超临界CO2处理温度对二醋酸纤维结构与性能的影响

doi:10.13475/j.fzxb.20190302507

纺织学报 ›› 2020, Vol. 41 ›› Issue (03): 8-14.doi: 10.13475/j.fzxb.20190302507

超临界CO₂处理温度对二醋酸纤维结构与性能的影响

朱维维¹, 蔡冲²^,³, 张聪²^,³, 龙家杰²^,³, 施楣梧¹^,³^,⁴()

1.东华大学纺织学院, 上海 201620
2.苏州大学纺织与服装工程学院, 江苏苏州 215000
3.苏州大学超临界流体无水绳状匹染技术科研基地, 江苏苏州 215123
4.军事科学院系统工程研究院军需工程技术研究所, 北京 100010

收稿日期:2019-03-12 修回日期:2019-12-17 出版日期:2020-03-15 发布日期:2020-03-27
通讯作者: 施楣梧
作者简介:朱维维(1989—),女,博士生。主要研究方向为基于超临界CO₂技术的亲肤性纤维的开发。

Effect of supercritical CO₂ treatment temperature on structure and property of diacetate fiber

ZHU Weiwei¹, CAI Chong²^,³, ZHANG Cong²^,³, LONG Jiajie²^,³, SHI Meiwu¹^,³^,⁴()

1. College of Textiles, Donghua University, Shanghai 201620, China
2. College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215000, China
3. National Scientific Research Base for Waterless Coloration with Supercritical Fluid, Soochow University, Suzhou, Jiangsu 215123, China
4. Institute of Quartermaster Engineering & Technology, Institute of System Engineering, Academy of Military Science, Beijing 100010, China

Received:2019-03-12 Revised:2019-12-17 Online:2020-03-15 Published:2020-03-27
Contact: SHI Meiwu

摘要/Abstract

摘要：

为拓展超临界CO₂技术在二醋酸纤维加工中的应用,采用不同超临界CO₂处理温度对二醋酸纤维进行处理,借助扫描电子显微镜、傅里叶变换红外光谱仪、X射线多晶衍射仪、热重分析仪、差示扫描量热仪和万能强力仪探讨了处理前后纤维表面形态、化学结构、聚集态结构、热降解性能、热稳定性和断裂强力的变化。结果表明:不同温度(80、100、120 ℃)条件下,纤维结晶度均有所下降,由处理前的39.41%分别降低至32.43%、31.57%、32.16%;当温度达120 ℃时,二醋酸纤维中部分氢键被破坏,纤维耐热性能、热稳定性有一定下降,但并不显著,纤维的表面形态、化学结构并未发生明显改变,拉伸断裂强力仍保持在3.20 cN左右。

关键词: 超临界CO₂, 二醋酸纤维, 表面形态, 聚集态结构, 热降解性能, 热稳定性, 拉伸断裂强力

Abstract:

In order to develop applications of supercritical CO₂ technology in processing diacetate fibers, supercritical CO₂ treatment to diacetate fibers at different temperatures was carried out. The fiber surface morphology,chemical structure, aggregation structure, thermal degradation property, thermal stability and tensile strength were investigated respectively by scanning electron microscope technology, infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, differential scanning calorimetry and universal strength tester. The results indicate that the crystallinity of diacetate fibers decrease from 39.41% to 32.43%, 31.57% and 32.16% respectively under different treatment temperatures(80, 100, 120 ℃). When the temperature is 120 ℃ some hydrogen bonds in diacetate fibers are destroyed, and the thermal resistance and thermal stability of diacetate fibers decrease slightly, but the surface morphology and chemical structure of diacetate fibers are virtually unchanged, and tensile strength remains to be about 3.20 cN.

Key words: supercritical CO₂, diacetate fiber, surface morphology, aggregation structure, thermal degradation property, thermal stability, tensile strength

中图分类号:

TS195.6

朱维维, 蔡冲, 张聪, 龙家杰, 施楣梧. 超临界CO₂处理温度对二醋酸纤维结构与性能的影响[J]. 纺织学报, 2020, 41(03): 8-14.

ZHU Weiwei, CAI Chong, ZHANG Cong, LONG Jiajie, SHI Meiwu. Effect of supercritical CO₂ treatment temperature on structure and property of diacetate fiber[J]. Journal of Textile Research, 2020, 41(03): 8-14.

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处理温度/℃	第1个峰		第2个峰		第3个峰		玻璃化转变温度/℃
处理温度/℃	温度/℃	热焓/(J·g^-1)	温度/℃	热焓/(J·g^-1)	温度/℃	热焓/(J·g^-1)	玻璃化转变温度/℃
未处理样	91.46	62.724 2	204.27	2.717 9	233.35	6.807 6	194.62
80	89.02	18.266 6	201.64	2.736 2	233.22	5.275 2	195.60
100	73.61	19.074 3	202.92	2.702 3	233.17	6.249 1	196.59
120	95.91	74.741 0	201.57	2.945 5	233.32	6.077 4	194.29

处理温度/℃	断裂强力/cN	强力变化率/%
未处理样	3.20	—
80	2.85	-10.94
100	3.48	8.75
120	2.90	-9.38

超临界CO₂处理温度对二醋酸纤维结构与性能的影响

Effect of supercritical CO₂ treatment temperature on structure and property of diacetate fiber

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