聚丙烯腈/醋酸纤维素/TiO2复合纳米纤维膜的制备及其光催化降解性能

doi:10.13475/j.fzxb.20181105807

纺织学报 ›› 2020, Vol. 41 ›› Issue (05): 8-14.doi: 10.13475/j.fzxb.20181105807

聚丙烯腈/醋酸纤维素/TiO₂复合纳米纤维膜的制备及其光催化降解性能

钱怡帆¹^,², 周堂³, 张礼颖²^,⁴, 刘万双²^,⁴, 凤权³()

1.东华大学纺织学院, 上海 201620
2.东华大学民用航空复合材料协同创新中心, 上海 201620
3.安徽工程大学纺织面料安徽省高校重点试验室, 安徽芜湖 241000
4.东华大学上海市高性能纤维复合材料协同创新中心, 上海 201620

收稿日期:2018-11-21 修回日期:2020-01-06 出版日期:2020-05-15 发布日期:2020-06-02
通讯作者: 凤权
作者简介:钱怡帆(1995—),女,硕士生。主要研究方向为功能性纳米纤维及其复合材料。
基金资助:
国家自然科学基金资助项目(21377004);安徽省自然科学基金资助项目(1408085ME87);安徽省高校自然科学研究项目(KJ2016SD04);安徽省科技计划项目(1604b0602024);地方高校国家级大学生创新创业训练计划项目(2016103630038)

Preparation of polyacrylonitrile/cellulose acetate/TiO₂ composite nanofiber membrane and its photocatalytic degradation performance

QIAN Yifan¹^,², ZHOU Tang³, ZHANG Liying²^,⁴, LIU Wanshuang²^,⁴, FENG Quan³()

1. College of Textiles, Donghua University, Shanghai 201620, China
2. Center for Civil Aviation Composites, Donghua University, Shanghai 201620, China
3. Anhui Provincial Key Laboratory of Textile Fabric, Anhui Polytechnic University, Wuhu, Anhui 241000, China
4. Shanghai Collaborative Innovation Center for High Performance Fiber Composites, Donghua University, Shanghai 201620, China

Received:2018-11-21 Revised:2020-01-06 Online:2020-05-15 Published:2020-06-02
Contact: FENG Quan

摘要/Abstract

摘要：

为研究碱改性前后复合纳米纤维膜的光催化降解性能,首先利用静电纺丝技术制备聚丙烯腈/醋酸纤维素/二氧化钛(PAN/CA/TiO₂)复合纳米纤维膜,依次用0.05、0.10 mol/L的氢氧化钠溶液对其进行碱处理,制得聚丙烯腈/再生纤维素/二氧化钛(PAN/RC/TiO₂)复合纳米纤维膜,并应用于染料废水处理。借助扫描电子显微镜、傅里叶红外光谱仪及接触角测量仪等手段表征了复合纳米纤维膜的结构与亲水性;同时研究了复合纳米纤维膜的力学与光催化降解性能。结果表明:经碱处理后,复合纳米纤维膜的静态接触角由125.30°减小到10.20°,亲水性能得到很大的改善;PAN/RC/TiO₂复合纳米纤维膜对亚甲基蓝(MB)溶液的降解率达到91.2%,而空白对照样对MB溶液的降解率仅为10.1%,且重复使用3次后,复合纳米纤维膜对MB溶液的降解率仍达74.7%。

关键词: 染料废水处理, 静电纺丝, 二氧化钛, 纳米纤维, 光催化

Abstract:

In order to investigate the photocatalytic degradation of composite nanofiber membrane before and after alkali modification, the polyacrylonitrile/cellulose acetate/nano-titanium dioxide (PAN/CA/TiO₂) composite nanofibers membrane were first prepared using the electrospinning technology, which was then alkaline treated with 0.05 and 0.10 mol/L NaOH solution respectively to achieve polyacrylonitrile/regenerated cellulose (PAN/RC/TiO₂) composite nanofiber membranes. Scanning electron microscopy observation, Fourier transform infrared spectroscopy analysis and static contact angle measurement were used to characterize the mechanical and photocatalytic degradation of the composite nanofiber membrane. The results show that after the alkali treatment, the static contact angle of the composite nanofiber membrane are reduced from 125.3°to 10.2°, the hydrophilic property is greatly improved. The degradation rate of PAN/RC/TiO₂ composite nanofiber membrane to MB solution reaches 91.2%, while the degradation rate of blank solution to MB solution is only 10.1%. After 3 repeated uses, the degradation rate caused by the MB solution still reaches 74.7%.

Key words: dye wastewater treatment, electrospining, titanium oxide, nanofibers, photocatalysis

中图分类号:

TQ619.2

钱怡帆, 周堂, 张礼颖, 刘万双, 凤权. 聚丙烯腈/醋酸纤维素/TiO₂复合纳米纤维膜的制备及其光催化降解性能[J]. 纺织学报, 2020, 41(05): 8-14.

QIAN Yifan, ZHOU Tang, ZHANG Liying, LIU Wanshuang, FENG Quan. Preparation of polyacrylonitrile/cellulose acetate/TiO₂ composite nanofiber membrane and its photocatalytic degradation performance[J]. Journal of Textile Research, 2020, 41(05): 8-14.

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样品	断裂强度/MPa	伸长率/%
PAN/CA	125.61	22.39
PAN/RC	95.70	21.20
PAN/CA/1%TiO₂	124.54	20.30
PAN/RC/1%TiO₂	87.62	19.80

样品	接触角/(°)
PAN/CA	125.30
PAN/RC	10.20
PAN/CA/1%TiO₂	119.10
PAN/RC/1%TiO₂	8.72

聚丙烯腈/醋酸纤维素/TiO₂复合纳米纤维膜的制备及其光催化降解性能

Preparation of polyacrylonitrile/cellulose acetate/TiO₂ composite nanofiber membrane and its photocatalytic degradation performance

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