Table of Content

15 October 2011, Volume 32 Issue 10

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Effects of character of silk fibroin on the properties of calcium phosphate cement

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  1-0. 

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The physicochemical properties of Calcium Phosphate Cement (CPC) were improved by adding in silk fibroin of varied character. The structure of the materials was investigated by X-ray diffraction and Fourier transform infrared spectroscopy. The surface morphology was observed by Scanning Electron Microscope. The porosity of the material was measured by drainage method. The mechanical properties were tested by Instron Universal Testing Machine. The results showed that the products of hardening reaction of CPC with silk fibroin of varied character added were similar to those of pure CPC as hydroxyapatite was produced in both reactions. Silk fibroin of varied character significantly improved the flexural strength of CPC. The character of the silk fibroin had distinct effects on the work-of-fracture, the work-of-fracture of CPC with silk fibers increased significantly, which was 7~21.8 times of that of pure CPC. The character of the silk fibroin had no significant effects on the structure of the materials, but the porosity decreased.

Synthesis of Poly(Butylene Succinate)

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  6-0. 

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High molecular weight Poly (Butylene Succinate) was obtained from Succinic Acid and 1, 4-Butanediol and based on different catalysts at different conditions through a polycondensation process, the side reaction of esterification were studied. The results showed that the esterification and the side reaction were significant affected by different esterification conditions, the number average molecular weight of the synthesized PBS being from 5.7*104 g/mol to 8.0*104 g/mol.

Composite low thermochomic energy-storage Materials Preparation

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  10-0. 

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Ultrasonic-assisted Extraction of Pigment from Natural Green Cotton

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  16-0. 

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This paper studied UV spectra Character of natural green cotton pigment in ethanol solution by UV spectrophotometer. There is linear relationship between the absorption values and pigment concentration at 360nm, R2=0.9992. Then, compared with normal extraction,the efficiencies of ultrasonic-assisted extraction in various conditions were studied. Theresults found that the efficiency of ultrasonic-assisted extraction was significantly higher than normal extraction， ultrasound-assisted extraction of natural green cotton pigment 20min reached the same extraction efficiency to ordinary extraction 5 hours, and ultrasonic-assisted extraction and normal extraction obtain the same pigment composition.

Influence of Environmental Moisture on Effects of Atmospheric Pressure Plasma Treatment

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  21-0. 

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As to the existence of water in atmospheric pressure plasma (APP) treatment, the influence of environmental moisture on the effects of atmospheric pressure plasma treatment of hydrophobic fiber was investigated. Ultrahigh modulus polyethylene fibers (UHMPE) fibers were treated using atmospheric pressure plasma in three different relative humidity levels, namely 5, 65% and 95%. The static contact angle and the interfacial shear strength (IFSS) of the control and the treated fibers were measured. The morphological and chemical changes on the fiber surface were characterized by Atomic Force Microscopy (AFM) and X-ray Photoelectron Spectra (XPS) respectively. After the plasma treatments, the surface roughness, the number of oxygen containing groups and IFSS increased while the water contact angle decreased and the tenacity din not change. The contact angle and IFSS did not obviously decrease and increase as the environmental moisture content increased. It was demonstrated that the moisture in the APP environment did not have a significant influence on effects of atmospheric pressure plasma treatment of hydrophobic fiber.

Catalytic oxidation of phenols by activated carbon fibers supported cobalt phthalocyanine

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  26-0. 

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In order to remove refractory phenolics, activated carbon fibers supported cobalt phthalocyanine combined with H2O2 as a catalytic oxidation system to catalytic degradation of substituted phenols was studied. The adsorption of ACF and the catalysis of cobalt phthalocyanine were brought into fullest play in this system. The effect of catalytic oxidation was analyzed by UPLC after 5h reaction which under the condition of CoPc-ACF 0.4g, H2O2 100 mmol/L, 25 oC and substituted phenols from 0.2 mmol/L to 0.5mmol/L. The results showed that surplus rate of phenols were under 3%, the kind and number of substitutent group has little effect on catalytic oxidation. The by-products formed in the catalytic oxidation of substituted phenols were identified by GC-MS methods. Catalytic oxidation degradation mechanism of substituted phenols by CoPc-ACF/ H2O2 was proposed

Effects of sputtering power on photocatalytic properties of TiO2 deposited fabrics

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  31-0. 

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Nanoscale titanium dioxide (TiO2) functional films were prepared on the surface of nonwoven polyester fabric at room temperature by DC reactive magnetron sputtering process. The surface morphology and the structural properties of TiO2 films deposited under different sputtering powers were characterized by X-ray photoelectron spectroscopy, X-ray diffraction and atomic Force Microscope. The deposition rate and photocatalytic properties of the fabrics with TiO2 films prepared under different sputtering powers analyzed. The test results showed that the deposition rate and sputtering efficiency increased with increasing sputtering powers within a proper range, although it had little influence on the chemical structure of coated film. Furthermore, the sputtering powers increased led to the uniformity and compactness increasing of TiO2 films. The potocatalytic activity of the polyester nonwoven fabric with TiO2 films were enhanced by increasing the sputtering powers. But overhigh sputtering power led to overheating of target, not only decrease the deposition rate and the uniformity of TiO2 films, also damage the target.

Study on the Semi-Open-End Twist Insertion Mechanism of the Fiber Strand in the Condensing Zone in Pneumatic Compact Spinning with Lattice Apron

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  37-0. 

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In the spinning process of pneumatic compact spinning with lattice apron, the existence of a wrap twisting phenomenon has been approved via high-speed photography technology. The additional twists in the fiber strand in the condensing zone, which are considered to be real twists, are also approved to exist through yarn spinning experiment. Based on these results, a ‘semi-open-end twist insertion’ model is proposed. The model can well explain the formation mechanism of the additional twists in the fiber strand in the condensing zone of the pneumatic compact spinning and enriches the yarn spinning theory.

Measurement of yarn fineness by digital image processing

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  42-0. 

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In this paper, taking the pure cotton pure yarn for example, a method based on digital image processing for yarn fineness visual measurement was proposed. The yarn image captured with video microscope was treated sequentially with 2-D adaptive Wiener filtering, segmentation using 2-D maximum entropy algorithm optimized with genetic algorithm, and morphology operation. Then, the yarn diameter and fineness are calculated from the clear and complete binary image after the above operations. The test data extracted from the yarn images that are taken as carriers can describe the yarn diameter and fineness more intuitively. Furthermore，when the fineness of the sample can not be measured by standard skein method, the sufficient fineness information still can be provide by splitting a certain number of yarns from the sample and carrying out the proposed method The experimental results indicate that the method for measurement the yarn diameter and fineness based on image processing and data analysis is feasible.

Determination on slub length for slub yarn of ring bobbin

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  47-0. 

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High degree of accuracy slub yarn can be produced by EJM128K model ring bobbin with servo-actuator of PLC control and mechanics change.In this paper，With transfer function of the control system was analysed ,this close loop control system possess stability ,precision and rapidity at parameter of slub length.The slub yarns were tested with USTER® TESTER5, and the distribution curve of slub length and slub space can be attained.Therefore,slub length deflection was influenced on slub length set ,slub yarn twist factor and fiber nature etc. This result can control effectively slub length and produce high-class slub yarn.

Effect of seam types and directions on drapability of seamed knitted fabrics

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  53-0. 

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In order to know the drapability of seamed knitted fabrics, four representative samples were selected. Influence of seam type and seam direction on the drape behavior of knitted fabrics was investigated through experiment. The results show that seamed knitted fabrics have greater drape coefficient, less number of folds, stable minimum amplitude of folds, and higher maximum amplitude of folds and poor uniformity of the distribution of folds. A comparison of seam types and the drape coefficients of fabrics show that drape coefficient for samples with overlock and flat-lock stitch type together is higher than for samples with overlock alone. Seam type and seam direction both have significant effect on thin knitted fabrics, however, only seam direction has significant influence on drape coefficient for thick fabrics, and the influence of seam type is insignificant.

A simple model for effective thermal conductivity of thermal protection fabrics considering radiation attenuation characteristics

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  57-0. 

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Thermal radiation makes a great contribution to heat transfer within protective fabrics under high temperature conditions. The thermal attenuation within the high-temperature fabric is investigated under high flux conditions in the present study. A numerical model analysis of thermal protective fabric is given by using one-dimensional finite differential technique. The governing heat transfer equations are solved numerically and effective thermal conductivity is calculated from the steady-state results. Predicted results are in good agreement with experimental data and the results are helpful to the optimum design of thermal protective fabrics and thermal protection system (TPS).

The tensile properties research of Multi-axial warp reinforced materials

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  61-0. 

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[4] LomovSV, Verpoest I, Barburski M, Laperre J. Carbon composites based on multiply stitched preforms. Part 2. KDS-F characterisation of the deformability of the preforms at low loads. Composites Part A 2003;34:359–70. [8] H. Kong , A.P. Mouritz , R. Paton Tensile extension properties and deformation mechanisms of multiaxial non-crimp fabrics. Composite Structures 2004;66:257–259. [9] Lussier D, Chen J. Material characterization of woven fabrics for thermoforming of composites. J Thermoplast Compos Mater 2002;15:497–509.

Study on the synthesizing process of sizing agent for acetate filament

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  66-0. 

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The sizing agent for acetate filament was synthesized by using vinyl acetate, methacrylic acid and butyl acrylate as monomers and adopting semi-continuous emulsion polymerization method. Solid content of the polymer, viscosity of size pastes conversion rate of monomers and water resistance of sizing film were tested. Then using single factor analysis to optimize these influencing factors, the best synthesizing process was established. Besides, the structure and properties of the polymer were analyzed by FTIR. Experimental results indicate that the property of copolymer emulsion is excellent with 0.75% initiator (APS, based on the total monomer), 3% complex emulsifier (OP-10:SDS is 3:1) and 4 hours of dropwisetime.

Study on synthesis and properties of a new type of polyester polyether copolymer hydrophilic finishing agent

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  73-0. 

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A new type of polyester polyether copolymer hydrophilic finishing agent was synthesized by adding modifying monomer with Sodium-5-sulfoisophthalic acid dimethyl ester (SIPM). The effect of these factors such as the dosage of SIPM、temperature and time of polycondensation and amount of catalyst on solubility in water or hydrophilic properties of finishing agent were studied, the synthesis reaction conditions was optimized, the structure and properties of finishing agent was studied by using FTIR、Thermal gravimetric analyzer and X-Ray diffraction, and the application properties of finishing agent were studied. The results indicate that when the molar ration of SIPM to ester(total amount of SIPM and DMT) is 30%, polycondensation temperature is 260℃, time is 45min, mass fraction of catalyst to ester is 0.20%, the water solubility, hydrophilicity and washing durability of finishing agent are good. TR analysis indicates that finishing agent has polyester polyether structure; TG analysis indicates thermal stability of finishing agent is good; XRD analysis indicates that finishing agent is non crystal compound; the hydrophilicity and washing durability of finished fabric with the finishing agent are equivalent with conventional polyester polyether finishing agent A, and the water solubility of the finishing agent is improved obviously.

Growth Inhibition Effects of Ethoxylate Fatty alcohol on Chinese hamster CHO cells and HeLa cells

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  79-0. 

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In this article, MTT assay is adopted to study three different kinds of ethoxylate fatty alcohol on Chinese Hamster Ovary（CHO）cells and Hela cells. The results indicate that the reproduction restraining effect of fatty alcohol ethoxylates both on CHO cells and Hela cells gradually decreased as the numbers of EO increased. In the other words, AEO5 shows the maximum inhibitory rates, followed is AEO9, and the minimum is AEO15. When the concentration of AEO5 is more than 0.05μL/mL and AEO9 is more than 0.075μL/mL, both their trend toward gentle inclined. When the concentration of AEO15 is 0. 1μL/mL, it’s growth inhibition rate still shows upward tendency. When the concentration of AEO5 and AEO9 are less than 0.005μL/mL, their reproduction restraining effects on CHO cells and Hela cells are unconspicuous. When the concentration of AEO15 is no more than 0.01μL/mL, its reproduction restraining effect on CHO cells and Hela cells is obsolete.

A Study on the Rheological Properties of Thickener For Digital Printing

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  83-0. 

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Abstract In this paper, the rheological properties of modified polyacrylate thickener for digital printing were studied and the results about the effect of that a variety of modifiers, additives, antifoamers and other additives as well as temperature on the rheological properties were also understood. They showed that the modified polyacrylate thickener presents pseudoplastic characteristics, which has a relatively stability to electrolyte, and the non-ionic surfactant has little effect on the performance of the system. The flow curve was fitted with exponential mode τ=k•γn and treated with unary linear regression, and the Arrhenius equation can describe the influence of temperature on flow energy of polyacrylate thickener accurately.

Effect of the crystal of nano-TiO2 on the performances of finished cotton fabric

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  88-0. 

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Rutile and anatase TiO2 and its poly(butyl acrylate) composites latexes were used to finish cotton fabric. The aging resistance, ultraviolet resistance and sterilization properties of finished cotton fabric under UV-irradiation were measured, in order to understand the response mechanism of different crystal TiO2 particles to UV-irradiation and its effect on the performances of finished cotton fabric. It was found that, rutile TiO2 finished cotton fabric exhibits excellent ultraviolet resistance, outstanding aging resistance and bad sterilization properties attributing to the strong optical absorption and diffuse scattering of rutile TiO2 particles, while anatase TiO2 finished cotton fabric excellent ultraviolet resistance, outstanding sterilization and accelerated aging properties attributing to the strong photocatalytic effect of anatase TiO2 particles. The strong photocatalytic effect under UV-irradiation can induce many strong oxidizing free radicals, which can effectively kill bacteria and simultaneously break the molecular chain of fiber inevitably. Thus, the crystal of TiO2 and its negative effects should be careful considered during function finishing of fabric.

Study on the structure and properties of the cotton fabric finished by MPCMs

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  93-0. 

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To develop thermo-regulated fabrics, the fabrics were finished by MPCMs. The structure and properties of the fabric before and after finish were characterized by means of SEM, FTIR, DSC and tensile tester. The results indicated the MPCMs could be fiished to the fabrics uniformly, and the hydrogen bonding between the cotton fibers were increased. The crystallinity of the finished fabrics were higher than that of the unfinished. The finished fabrics had excellent thermoregulation, which could absorb amounts of heats, and the decomposition temperature and enthalpy of the finished fabrics were higher than those of the unfinished. The breaking strength of the finished fabrics was increased, however, the air permeability of the finished fabrics decreased.

Laser surface treatment for fashion design

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  98-0. 

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In this study, surface treatment using laser engraving for fashion design was investigated on polyester fabric. The properties of original and treated materials such as weight, thickness, tear strength, tensile strength, colour difference and optical microscope view were evaluated. The results demonstrate this treatment is a feasible design method for fashion design and it can engrave different motifs for the changing of garment appearance. In addition, this treatment approach differs from ordinary design methods without discharging any polluted water and can present fine appearance and create higher added value.

The establishment of mathematical model base on over-turned collar Concave structure

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  104-0. 

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In order to make the lapel and collar band brought fold accurate, simple structure, even the lapel fold freely, keep attractive appearance, this study through direct drawing method, according to Japanese culture bodice prototype for garment body, using different bust, different collar band and collar concave, draft turndown collar. It make 96 pieces collar sample, try on the standards body mold, confirm the center point of collar, measure lapel and collar band, then analyse change rules of lapel structure, carry out correlation analysis and regression analysis, establish of mathematical model of over-turned collar Concave structure. It will realize lapel structure scientific and simple. It will provide pattern experience for technical personnel, and provide basic structure for intelligent CAD pattern system.

Testing and Simulation for the anti-electromagnetic property of electromagnetic shielding clothing for pregnant women

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  108-0. 

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Abstract Based on the analysis of the electromagnetic shielding clothing for pregnant women, the anti-electromagnetic property of two electromagnetic shielding vests for pregnant women are tested through specific experiment. According to the actual testing conditions, a simulation model is established by the three-dimensional electromagnetic simulation software Ansoft HFSS to obtain the shielding effectiveness (SE) of clothing. The effects of changes in body shape for pregnant women during pregnancy on the anti-electromagnetic property of clothing are analyzed through the simulation model. The results show that the simulation results are basically identical with the actual measurement results, and the model of testing clothing can be applied for the researches on the protective function for electromagnetic radiation. The study also shows that the changes in body shape for pregnant women will directly cause the increase of bottom opening, and then the anti-electromagnetic property of clothing shows a downtrend. When the bottom opening of clothing increases to a certain degree, the SE values of clothing under the irradiation of electromagnetic waves at different frequencies are very small, that is to say the protective clothing has no function to protect pregnant women from electromagnetic radiation.

Investigation into the she

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  113-0. 

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"Phoenix-style" is the typical national fashion type,forming with the evolving history of She."Phoenix-style" is communioning manifestations of the material culture and spiritual culture of She,containing rich cultural connotation and aesthetic arts.This article deeply discusses the origin,the morphological features of She, and the She rich folk culture, religion and history, culture and other aspect condensed by the "Phoenix-style",and deeply analysis the reasons forming this unique cultural connotation, and then deeply proclaims the process of She history development and the essence of traditional dress culture.

Establishment and application of the methematival model of the computerized fly frame control system

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  118-0. 

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According to the complexity of the mechanical structure of traditional fly frame, analyses the forming principle of roving winding, and put forward the overall design scheme of multi-motor drives fly frame, cancelled multifarious mechanical structure, and its corresponding function is controlled by computer, analyses several motor three winding mathematic model, the method established by the mathematical pattern of the motor speed changing and roving winding shaping mathematical pattern parameters are given, the influence of yarn tension trend line, especially from the point of view of the actual use of the area, the ideal reversing forbid it realized the commutation of the mathematical model including size yarn forbid it before, and reversing for different provide a guarantee of good shape, with four motor drive for both divisions are introduced with both traditional fly frame parameters adjustment method, both the difference of electrical fly frame and traditional fly frame can be conveniently set, change the parameters, transform the roving varieties, has high practical value.

Improvement on closing fibers-converging device of swirl spinning and yarn performance

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  122-0. 

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In order to explore a new method to lead yarn in swirl spinning, the closed fibers-converging device of swirl spinning is improved by designed with lead yarn channel and yarn guide roller. The yarn is formed by fetching the converged fiber bundles and then twisting the bundles through the swirl nozzle. This paper firstly analyzes the different improvements on the before and after fibers-converging device and the principles of yarn. And then the yarn spun through changing the pressure of the swirl nozzle, is tested two main performances such as breaking force, yarn hairiness. Through the results of analyzing the tests and the changes in the structure of yarn analyzed by electron microscope, we can find the method can be used to spin cotton yarn, the air pressure also have a big influence on the yarn quality and the yarn of improved swirl spinning have different from appearances from before. The results provide a basis for the study on the new fibers-converging device of swirl spinning.

Study on tension and velocity decentralized control of let-off system with servo control

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  127-0. 

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To solve the change of Web diameter resulting in the warp tension and velocity becoming more complicated, time-varying and non-linear, which has a severe influence on performance of let-off system controller, such as stability, accuracy and dynamic performance, this paper presents a warp tension and velocity decentralized control with servo controller as actuator. First, an accurate dynamic model is developed for the let-off system; Second, the let-off system is decoupled into the constant tension control and the velocity control; Finally, a strategy for computing reference velocity of let-off is presented, which integrated with feed-forward control, PID control, being composed of the constant tension controller. An experimental analysis between general decentralized PI controller and proposed decentralized controller show that proposed decentralized controller is capability of suppressing the disturbance more effectively and has better accuracy, faster response, more robust and wide range of applications broader.

Testing system for high-speed solenoid valve of knitting machinery based on virtual instrument

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  134-0. 

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At present, the dynamic response characteristics of the high-speed solenoid valve for knitting machinery cannot be quantitatively tested. In this paper, a testing system for high-speed solenoid valve of knitting machinery is designed, which can be applied in the quantitative determination of dynamic response characteristics and electrical parameters of high-speed solenoid valve (e.g. solenoid valve for needle selecting). The system, which is designed based on virtual instrument, consists of the general-purpose computer, data acquisition card and customized testing platform. The high-speed data acquisition technology and non-contact measurement methods based on machine vision are utilized in this system. Proper software design is also taken into account to guarantee the functionality of the system. Experimental results indicate that the system can effectively measure the dynamic response characteristics and electrical parameters of the high-speed solenoid valve for knitting machinery.

Texture segmentation and contour extraction of jacquard fabric

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  141-0. 

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To improve the intelligent analysis and design technology of warp knitting jacquard fabric, a new way of texture segmentation and contour extraction based on wavelet-transform and canny operator is proposed in this paper. Firstly making use of the wavelet-transform which has the ability of orientation and multiresolution, the algorithm decomposes the low frequency part of the fabric image in a way of pyramid-structure. Secondly from the biggest level after decomposition, the image is automatic clustered and segmented with the information at the next level. Lastly the texture’s contour of image is traced and extracted through the method of canny operator. The results show that this algorithm is a feasible way for jacquard fabric, and it supplies a theoretical platform for subsequent research.

Research on the simulation model of 2-step three-dimensional braided fabrics

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  147. 

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By taking the 2-step braided rectangular fabrics as an example, the place where the minimum distance between two crossing yarns locates in the fabrics is explored with the help of math and diagram after yarns’ moving regulation and curvilinear state are studied; Then the determination of minimum pitch length is discussed on the understanding that yarns only keep touching not interfering with each others in compacted state. A simulation model of braided fabrics is also presented on 3DS MAX platform in which braiding yarns appear straight inside the fabrics, bending at the surface with a circular cross-section. The model expresses fabrics appearance and yarns interlacing clearly, and prepares the ground for analysis of braid microstructure and related mechanics.

The history and research hotspot of three-dimensional virtual clothing display

JOURNAL OF TEXTILE RESEARCH. 2011, 32(10):  153-0. 

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Virtual garment simulation and display involves a combination of a large range of techniques, including modeling techniques, numerical methods, collision detection and user interface techniques. From the late 1980s, the virtual clothing simulation techniques have developed from early fabric draping to complex haute couture garments. Simulation of the complex cloth deformation and fashion garments can only be reached through an optimal combination of modeling techniques and numerical methods. There is, however, no universal solution for integrating the equations of a mechanical model of cloth. In this paper, the history of the visualization for the fabric deformation and the display for the virtual clothing are introduced respectively. Furthermore, the key issues of three-dimensional virtual clothing display, such as challenges, research hotspot and trends, are discussed.