Journal of Textile Research ›› 2023, Vol. 44 ›› Issue (08): 143-150.doi: 10.13475/j.fzxb.20220605301

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Interfacial bonding properties of ultra-high molecular weight polyethylene fabric/thermoplastic polyurethane composites

ZHANG Xing1,2, YE Wei1,2,3, LONG Xiaoyun1,2, CAO Haijian1,2, SUN Qilong1,2, MA Yan1,2, WANG Zheng4()   

  1. 1. National & Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Protection, Nantong University, Nantong, Jiangsu 226019, China
    2. College of Textiles and Clothing, Nantong University, Nantong, Jiangsu 226019, China
    3. Yangzhou Sparkle Industrial Co., Ltd., Yangzhou, Jiangsu 225200, China
    4. Institute of Defense Engineering, AMS, Beijing 100036, China
  • Received:2022-06-22 Revised:2023-05-22 Online:2023-08-15 Published:2023-09-21

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Abstract:

Objective This research is to tackle the poor adhesion between ultra-high molecular weight polyethylene (UHMWPE) fiber fabric and thermoplastic polyurethane (TPU) by using atmospheric pressure dielectric barrier discharge (DBD) plasma to treat the surface of UHMWPE fabric and adjust the adhesive process aiming to improve the composite material interface bonding properties.

Method The UHMWPE fiber fabrics were treated by hot-pressing using a hot melt bonding machine with different parameters such as voltage and number of atmospheric pressure in DBD plasma treatment. The composite properties such as fiber structure, surface morphology, chemical composition, breaking strength and peeling strength were tested and characterized by scanning electron microscope, X-ray diffractometer, X-ray photoelectron spectrometer and electronic universal material testing machine.

Results With the increase of heating temperature and time in the thermal compounding process, the monoclinic crystalline shape gradually disappeared and the diffraction peaks of orthogonal crystalline shape became smaller, and the high heating temperature easily led to the destruction of the regular fiber structure (Fig. 2), causing decrease in fracture strength of fibers. For the adhesion performance of UHMWPE fiber fabric and TPU without atmospheric pressure DBD plasma treatment, the peel strength became larger with the increase of hot-pressing time at the lower temperature of 110 ℃ and below.The peel strength increased and then decreased with the increase of hot-pressing time when the treatment temperature increases to 120 ℃ and 130 ℃. When the hot-pressing temperature was 120 ℃ and the time is 30 s, the adhesion performance of UHMWPE fiber fabric and TPU reached the optimum, and the peel strength reached 42.88 N/(25 mm) (Fig. 5). After the atmospheric pressure DBD plasma treatment, the surface of UHMWPE fibers produced obvious etching marks (Fig. 6), while a large number of free radicals were generated on the fiber surface under the excitation of plasma, and the free radicals reacted with oxygen in the air to produce oxygen-containing polar groups such as C=O and O—C=O (Fig. 7), and the content of polar groups increased from 0% to 7.02% and 3.85% (Tab. 2), the increase of reactive groups were shown to significantly improve the adhesion performance of UHMWPE fabric and TPU. The mechanical properties of the filament bundle and the peel strength of the fabric increased and then decreased with the increase of the treatment voltage and the number of treatments. When subjected to three atmospheric DBD plasma treatments under 200 V, the fabric composite performance reached the optimal state, where the filament bundle breaking strength increased by 1.8%, and the peel strength reached 56.05 N/(25 mm), representing an increase of 30.72% (Fig. 8).

Conclusion In the composite manufacturing process of UHMWPE fiber fabric and TPU, when the hot-pressing temperature is 120 ℃ and the hot-pressing time is 30 s, the bonding property of UHMWPE fabric and TPU is the best, with the peel strength being 42.88 N/(25 mm). After atmospheric pressure DBD plasma treatment, obvious etching marks are produced on the UHMWPE fiber surface, the oxygen-containing polar functional groups on the fiber surface are increased, and the mechanical properties of the tow and the peel strength of the fabric increase and then decrease with the increase of the treatment voltage and the number of treatments. When the treatment voltage was 200 V for 3 times, the breaking strength of the tow is increased by 1.8% and the peel strength is increased by 30.72%. In this paper, through the exploration of composite process, atmospheric pressure DBD plasma was used to improve the interfacial bonding properties of UHMWPE fiber fabric/TPU composites, which promoted the application of UHMWPE fiber fabric in light and high strength tent membrane materials.

Key words: ultra-high molecular weight polyethylene fiber, thermoplastic polyurethane, breaking strength, interface, bonding property

CLC Number: 

  • TS102.6

Fig. 1

Schematic diagram of atmospheric pressure dielectric barrier discharge plasma equipment"

Fig. 2

XRD patterns of UHMWPE fibers after different heat treatment temperatures"

Fig. 3

SEM images of UHMWPE fiber surface before and after heat and pressure treatment(×5 000). (a)Before hot-press treatment; (b) After hot-press treatment at 120 ℃; (c) After hot-press treatment at 130 ℃"

Fig. 4

Relationship between hot pressing temperature(a), hot pressing time(b) and breaking strength of UHMWPE tow"

Fig. 5

Relationship between hot pressing temperature, hot pressing time and peel strength"

Fig. 6

SEM images of UHMWPE fiber surface before and after DBD plasma treatment (×1 000). (a) Untreated fiber; (b) Treated with 100 V DBD plasma; (c) Treated with 150 V DBD plasma; (d) Treated with 200 V DBD plasma; (e) Treated with 250 V DBD plasma"

Fig. 7

XPS spectra of UHMWPE fiber. (a) XPS spectra before and after DBD plasma treatment; (b) O1s spectra before and after DBD plasma treatment; (c) C1s spectra before DBD plasma treatment; (d) C1s spectra after DBD plasma treatment"

Tab. 1

Changes of contents of C,O and N on surface of UHMWPE fiber before and after DBD plasma treatment"

样品 元素含量/%
C N O
未处理 95.94 0.80 3.26
处理后 92.27 0.62 7.10

Tab. 2

Changes of surface functional group content of UHMWPE fiber before and after DBD plasma treatment"

基团种类 基团含量/%
未处理 处理后
C—C/C—H 88.76 80.21
C—O/C—N 11.24 8.90
C=O 0 7.02
O—C=O 0 3.85

Fig. 8

Relationship between plasma treatment voltage(a), times(b) and UHMWPE fabric peel strength and fabric bundle breaking strength"

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