静电纺聚乳酸纤维的孔隙结构及其空气过滤性能

纺织学报 ›› 2014, Vol. 35 ›› Issue (11): 6-0.

静电纺聚乳酸纤维的孔隙结构及其空气过滤性能

王哲,潘志娟

苏州大学纺织与服装工程学院

收稿日期:2013-10-18 修回日期:2014-04-27 出版日期:2014-11-15 发布日期:2014-11-20
通讯作者: 潘志娟 E-mail:zhjpan@suda.edu.cn
基金资助:
苏州市纳米技术专项资助项目；江苏高校优势学科建设工程资助项目

Porous structure and air filtration performance of electrospinning PLA fibers

Received:2013-10-18 Revised:2014-04-27 Online:2014-11-15 Published:2014-11-20
Contact: PAN Zhi-Juan E-mail:zhjpan@suda.edu.cn

摘要/Abstract

摘要： 采用静电纺丝法制备了纤维表面和内部均具有孔隙结构的超细聚乳酸（PLA）纤维。研究了PLA溶液的质量分数、DCM/DMAC混合溶剂配比、电压、纺丝液流量等参数对纤维表面孔隙覆盖率及孔隙大小的影响。结果表明，PLA溶液浓度和DCM/DMAC溶剂质量配比对纤维表面孔隙结构的影响较大，纺丝电压的影响次之，纺丝液流量的影响最小。在溶液质量分数为7%、DCM/DMAC质比10:1、电压16kV、流量1mL/h的条件下，制备得到的PLA多孔纤维纤维膜，具有高效低阻的过滤性能，其对数量中值直径为75nm的氯化钠气溶胶颗粒的过滤效率达99.964%，压降仅为197.9Pa。

关键词: 静电纺丝, 多孔纤维, 聚乳酸, 空气过滤材料

Abstract: PLA fibers with nanoporous structures both inside and on the surfaces of them were fabricated via electrospinning. The effect of electrospinning parameters such as PLA mass fractions, weight ratios of the mixed solvent dichloromethane(DCM)/N,N-Dimethylacetamida(DMAC), voltage and flow rate on the pore coverage rate and the pore size on the surface of the fibers have been studied. The results show that PLA mass fractions and weight ratios of the mixed solvent DCM/DMAC affect mostly, voltage take the second place while the flow rate have weak influence. The porous PLA fibrous membrane which was prepared with PLA mass fractions of 7 wt%, DCM/DMAC 10:1, voltage 16kV and flow rate 1mL/h had high efficiency and low resistance for air filtration, the filtration efficiency could reach 99.964% when tested by using NaCl aerosol with 75nm volume median diameter and the pressure drop was just about 197.9Pa.

Key words: electrospinning, porous fiber, PLA, air filtration materials

中图分类号:

TQ 340.64

王哲潘志娟. 静电纺聚乳酸纤维的孔隙结构及其空气过滤性能[J]. 纺织学报, 2014, 35(11): 6-0.

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