超临界CO2流体处理时间对二醋酯纤维结构与性能的影响

doi:10.13475/j.fzxb.20201103406

纺织学报 ›› 2021, Vol. 42 ›› Issue (12): 97-102.doi: 10.13475/j.fzxb.20201103406

超临界CO₂流体处理时间对二醋酯纤维结构与性能的影响

朱维维¹^,², 管丽媛¹^,², 龙家杰¹^,², 施楣梧¹^,²^,³()

1.苏州大学纺织与服装工程学院, 江苏苏州 215123
2.中国纺织工程学会超临界流体无水绳状匹染技术科研基地(苏州大学), 江苏苏州 215123
3.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:2020-11-16 修回日期:2021-09-15 出版日期:2021-12-15 发布日期:2021-12-29
通讯作者: 施楣梧
作者简介:朱维维(1989—),女,博士。主要研究方向为基于超临界CO₂流体的功能性纺织品开发。

Effects of supercritical CO₂ fluid treatment time on structure and properties of diacetate fibers

ZHU Weiwei¹^,², GUAN Liyuan¹^,², LONG Jiajie¹^,², SHI Meiwu¹^,²^,³()

1. College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215123, China
2. CTES Scientific Research Base for Waterless Coloration with Supercritical Fluid(Soochow University), Suzhou, Jiangsu 215123, China
3. Institute of Quartermaster Engineering & Technology, Institute of System Engineering, Academy of Military Sciences, Beijing 100010, China

Received:2020-11-16 Revised:2021-09-15 Published:2021-12-15 Online:2021-12-29
Contact: SHI Meiwu

摘要/Abstract

摘要：

为将超临界CO₂流体应用于二醋酯纤维的功能化加工,赋予二醋酯纤维高附加值,借助扫描电子显微镜、傅里叶红外光谱仪、X射线多晶衍射仪、热重差热分析仪、万能材料试验机探讨了超临界CO₂流体处理时间对二醋酯纤维表观形态、化学结构、聚集态结构及热性能和拉伸断裂性能的影响。结果表明:经超临界CO₂流体处理60、90、120 min后,二醋酯纤维表面颗粒状杂质被去除,其分子链排列规整度下降,结晶度由未处理纤维的39.41%分别下降至35.33%、31.57%、36.10%,纤维断裂强力呈先下降后增加趋势;当处理时间为120 min时,二醋酯纤维分子链间氢键作用强度略微降低,其熔点基本不变,高温下纤维质量损失率由未处理纤维的89.52%增加至95.66%。

关键词: 超临界CO₂流体, 二醋酯纤维, 表观形态, 聚集态结构, 热稳定性, 断裂强力

Abstract:

In order to functionally finish diacetate fibers using supercritical CO₂ fluid technology, which gives high added value to diacetate fibers, the effects of supercritical CO₂ fluid treatment time on surface morphology, chemical structure,aggregation structure,thermal property and tensile strength of diacetate fiber were investigated by means of scanning electron microscope, Fourier infrared spectrometer, X-ray polycrystalline diffractometer, thermogravimetric analyzer, differential scanning calorimetry and universal strength tester. Results show the particulate impurities are removed on the surface of the diacetate fiber treated by supercritical CO₂ fluid for 60, 90 and 120 min, and the order of the molecular chain decreased, as well as the crystallinity of diacetate fibers decreases from 39.41% of untreated fiber to 35.33%, 31.57%, 36.10% respectively, and the breaking strength of fiber decreased first and then increased. After 120 min of supercritical CO₂ fluid treatment, the breaking strength of hydrogen bond between molecular chains of diacetate fibers shows a slight decrease. The melting point of the diacetate fibers is basically the same, and the mass loss rate of fiber increase from 89.52% to 95.66% in high temperature.

Key words: supercritical CO₂ fluid, diacetate fiber, surface morphology, aggregation structure, thermal stability, breaking strength

中图分类号:

TS195.6

朱维维, 管丽媛, 龙家杰, 施楣梧. 超临界CO₂流体处理时间对二醋酯纤维结构与性能的影响[J]. 纺织学报, 2021, 42(12): 97-102.

ZHU Weiwei, GUAN Liyuan, LONG Jiajie, SHI Meiwu. Effects of supercritical CO₂ fluid treatment time on structure and properties of diacetate fibers[J]. Journal of Textile Research, 2021, 42(12): 97-102.

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处理时间/ min	起始分解温度/℃	最大分解速率对应温度/℃	质量损失率/%
0	341.0	366.3	89.52
60	341.6	367.7	91.40
90	341.8	367.6	89.64
120	338.5	363.3	95.66

处理时间/ min	第1个峰		第2个峰		第3个峰		玻璃化转变温度/℃
处理时间/ min	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/℃
0	91.46	62.724 2	204.27	2.717 9	233.35	6.807 6	194.62
60	88.85	85.406 1	201.37	2.513 0	233.12	6.416 9	195.98
90	73.61	19.074 3	202.92	2.702 3	233.17	6.249 1	196.59
120	102.41	102.273 2	202.57	2.762 4	233.48	6.418 8	194.80

处理时间/min	断裂强力/cN	断裂强力变化率/%
0	3.20
60	2.92	-8.75
90	3.48	8.75
120	3.35	4.69

超临界CO₂流体处理时间对二醋酯纤维结构与性能的影响

Effects of supercritical CO₂ fluid treatment time on structure and properties of diacetate fibers

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