正二十烷/醋酸纤维素相变过滤材料的制备及其性能

doi:10.13475/j.fzxb.20180901407

纺织学报 ›› 2019, Vol. 40 ›› Issue (09): 15-21.doi: 10.13475/j.fzxb.20180901407

正二十烷/醋酸纤维素相变过滤材料的制备及其性能

郭新月¹, 杨占平², 宋晓梅², 徐阳¹()

1.生态纺织教育部重点实验室(江南大学), 江苏无锡 214122
2.南通醋酸纤维有限公司, 江苏南通 226008

收稿日期:2018-09-05 修回日期:2019-02-04 出版日期:2019-09-15 发布日期:2019-09-23
通讯作者: 徐阳
作者简介:郭新月(1996—),女,硕士生。主要研究方向为高导热储热降温复合纺织材料。
基金资助:
国家自然科学基金项目(51641303);江苏省研究生科研与实践创新计划项目(SJCX18_0625);江苏高校品牌专业建设工程资助项目(PPZY2015B147);中央高校基本科研业务费专项资金资助项目(JUSRP11701)

Preparation and properties of n-eicosane/cellulose diacetate phase change filter material

GUO Xinyue¹, YANG Zhanping², SONG Xiaomei², XU Yang¹()

1. Key Laboratory of Eco-Textiles (Jiangnan University), Ministry of Education, Wuxi, Jiangsu 214122, China
2. Nantong Cellulose Fibers Co., Ltd., Nantong, Jiangsu 226008, China

Received:2018-09-05 Revised:2019-02-04 Online:2019-09-15 Published:2019-09-23
Contact: XU Yang

摘要/Abstract

摘要：

为使过滤材料在使用过程中可实现烟气快速降温,以二醋酸纤维为载体基质,正二十烷为相变材料,采用静电纺丝技术制备了正二十烷/醋酸纤维素复合相变过滤材料,并通过掺杂单壁碳纳米管进一步加快其吸热降温速率。探讨了正二十烷质量分数对纺丝液可纺性、过滤材料表观形貌和热性能的影响,以及单壁碳纳米管质量分数对过滤材料表观形貌、热性能及储热速度的影响。结果表明:添加正二十烷使纺丝液可纺性下降,但随其质量分数的增加,纺丝液的可纺性与成纤性能有所改善,纤维平均直径增加,过滤材料熔融热焓增大,当正二十烷与二醋酸纤维素的质量比为3∶10时,过滤材料的相变焓效率最高,达84.1%;随着单壁碳纳米管质量分数的增加,过滤材料瞬时吸热速率提高,添加质量分数为1.0%时,过滤材料瞬时吸热速度由纯二醋酸纤维的0.062 ℃/s增加到0.202 ℃/s。

关键词: 烟气降温, 二醋酸纤维, 正二十烷, 单壁碳纳米管, 静电纺丝, 复合相变过滤材料

Abstract:

In order to achieve rapid cooling of flue gas, the composite phase-change gas filtration materials were prepared by using the common tobacco filter material diacetate fiber as the carrier matrix and n-eicosane as the phase change material, and the cooling rate of the composite filter materials were further accelerated by doping single-walled carbon nanotubes. The influence of the content of n-eicosane on the spinnability of compound spinning liquid and on the apparent morphology and thermal properties of composite phase change filter materials and the influence of the content of single-walled carbon nanotubes on the apparent morphology, thermal properties and heat storage velocity of composite phase change filter materials were discussed. The results show that adding n-eicosane lowers the spinnability of the compound spinning liquid, but with the increase of the content of n-eicosane, the spinnability and plasticity of the spinning solution are improved, the average fiber diameter increases, and the melting enthalpy of filter materials increases accordingly. When the mass ratio of n-eicosane to cellulose diacetate is 3∶10, the highest enthalpy efficiency of the filter material is 84.1%. As the content of single-walled carbon nanotubes increases, the instantaneous heat absorption rate of the filter material increases. When the doping amount is 1.0%, the instantaneous heat absorption rate of the filter material increases from 0.062 ℃/s of pure diacetate fiber filter material to 0.202 ℃/s.

Key words: flue gas cooling, diacetate fiber, n-eicosane, single-walled carbon nanotube, electrospinning, composite phase change filter material

中图分类号:

TQ342.94

郭新月, 杨占平, 宋晓梅, 徐阳. 正二十烷/醋酸纤维素相变过滤材料的制备及其性能[J]. 纺织学报, 2019, 40(09): 15-21.

GUO Xinyue, YANG Zhanping, SONG Xiaomei, XU Yang. Preparation and properties of n-eicosane/cellulose diacetate phase change filter material[J]. Journal of Textile Research, 2019, 40(09): 15-21.

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正二十烷与二醋酸纤维素质量比	表观黏度/ (Pa·s)	表面张力/ (mN·m^-1)	可纺性指标/ (cm·s^-1)
0:10	3 080.0	11.6	0.004
1:10	105.9	12.4	0.117
3:10	290.0	17.7	0.061
5:10	419.1	30.6	0.073
7:10	1 433.0	12.9	0.009

正二十烷与二醋酸纤维素质量比	熔融温度/℃	熔融热焓/ (kJ·kg^-1)	理论热焓/ (kJ·kg^-1)	相变焓效率 /%
正二十烷粉末	37.8	241.7
1:10	37.1	16.0	22.0	73.0
3:10	37.2	46.9	55.8	84.1
5:10	37.8	61.6	80.6	76.5
7:10	37.0	74.7	99.5	75.0

正二十烷/醋酸纤维素相变过滤材料的制备及其性能

Preparation and properties of n-eicosane/cellulose diacetate phase change filter material

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