热气流固结纤维网串珠结构可控性及其结晶动力学

doi:10.13475/j.fzxb.20180706908

纺织学报 ›› 2019, Vol. 40 ›› Issue (8): 27-34.doi: 10.13475/j.fzxb.20180706908

热气流固结纤维网串珠结构可控性及其结晶动力学

周铃¹^,²^,³, 靳向煜¹^,²^,³()

1.东华大学纺织学院, 上海 201620
2.东华大学纺织面料技术教育部重点实验室,上海 201620
3.东华大学产业用纺织品教育部工程研究中心, 上海 201620

收稿日期:2018-07-25 修回日期:2019-05-09 出版日期:2019-08-15 发布日期:2019-08-16
通讯作者: 靳向煜
作者简介:周铃(1994—),女,硕士生。主要研究方向为热风非织造材料新产品的开发。
基金资助:
“纺织之光”应用基础研究项目(J201703)

Controllability of bead structure in hot air-through bonded nonwovens and crystallization kinetics thereof

ZHOU Ling¹^,²^,³, JIN Xiangyu¹^,²^,³()

1. College of Textiles, Donghua University, Shanghai 201620, China
2. Key Laboratory of Textile Science & Technology, Ministry of Education, Donghua University, Shanghai 201620, China;
3. Engineering Research Center of Technical Textiles, Donghua University, Shanghai 201620, China

Received:2018-07-25 Revised:2019-05-09 Online:2019-08-15 Published:2019-08-16
Contact: JIN Xiangyu

摘要/Abstract

摘要：

为研究热气流固结过程中纤维网串珠结构的可控性,采用二次热处理方法,通过调控聚乙烯/聚对苯二甲酸乙二醇酯(PE/PET)皮芯复合纤维处理温度、处理时间、纤维皮芯比制备不同的串珠结构;利用Image Pro Plus图像处理软件分析串珠结构的变化规律。借助X射线衍射仪研究纤维网中串珠纤维的结晶性能,并从结晶动力学角度,采用差式扫描量热法对纤维网中串珠纤维的结晶过程进行跟踪分析。结果表明:皮芯比为50:50的聚乙烯/涤纶皮芯复合纤维在140 ℃、120 s的二次热处理条件下可得到不规则参数值接近于1的串珠纤维;随热处理温度升高,串珠纤维结晶度先增加后降低,处理温度为140 ℃时结晶度最大;串珠纤维皮层Avrami指数在1左右,随着结晶温度的增加,串珠纤维结晶速率呈下降趋势。

关键词: 聚乙烯/聚对苯二甲酸乙二醇酯皮芯复合纤维, 热风非织造布, 直径分布, 串珠结构, 结晶动力学

Abstract:

In order to realize the controllability of bead structures in hot air-through bonded nonwovens, a secondary heating process was adopted. By controlling the processing temperature and processing time as well as the sheath-core ratio of polyethylene/polyester (PE/PET) composite fibers, beads of different structures were prepared. The change rule of the bead structure was analyzed by using Image Pro Plus image processing software. The crystallization properties of the bead fibers in the web were investigated by an X-ray diffractometer. Differential scanning calorimetry was also adopted to trace the crystallization process of bead structures in the web. The results show that the PE/PET bicomponent fibers with a sheath-core ratio of 50:50 can achieve the most rounded (irregular parameter value close to 1) bead structure under the conditions of the secondary heating temperature of 140 ℃ and the reheating time of 120 s. With the increase of temperature, the crystallinity of bead fiber increases first and then decreases. The isothermal crystal kinetics analysis of the Avrami equation shows that the Avrami index is around 1, and as the crystallization temperature increases, the crystallization rate decreases gradually.

Key words: polyethylene/polyester sheath-core fiber, hot air-through bonded nonwoven, diameter distribution, bead structure, crystallization kinetics

中图分类号:

TS174.1

周铃, 靳向煜. 热气流固结纤维网串珠结构可控性及其结晶动力学[J]. 纺织学报, 2019, 40(8): 27-34.

ZHOU Ling, JIN Xiangyu. Controllability of bead structure in hot air-through bonded nonwovens and crystallization kinetics thereof[J]. Journal of Textile Research, 2019, 40(8): 27-34.

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试样编号	温度/℃	时间/s	试样编号	温度/℃	时间/s
1^#	0	0	8^#	120	120
2^#	140	30	9^#	130	120
3^#	140	60	10^#	140	120
4^#	140	90	11^#	150	120
5^#	140	120	12^#	160	120
6^#	140	150	13^#	170	120
7^#	140	180

样品编号	2θ/(°)	I_c	I_a	β/(°)	X_c/%	D₁₀₁/nm	d/nm
未处理样品	22.133	14 387	22 981	8.678	38.50	0.93	0.401 3
10^#	21.889	21 034	33 444	8.547	38.61	0.94	0.405 7
13^#	21.945	9 246	21 483	9.769	30.09	0.81	0.404 6

T_c/℃	K	n	t_1/2/min	G/min^-1
103.5	0.89	0.67	0.69	1.45
104.0	0.71	0.70	0.97	1.03
104.5	0.56	0.97	1.25	0.80
105.0	0.45	1.00	1.54	0.65

热气流固结纤维网串珠结构可控性及其结晶动力学

Controllability of bead structure in hot air-through bonded nonwovens and crystallization kinetics thereof

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