静电纺丝
材料科学
多孔性
结晶
复合数
丙酮
醋酸纤维素
复合材料
聚合物
纳米纤维
膜
化学工程
溶剂
纤维素
化学
有机化学
工程类
生物化学
作者
Zihan Lu,Bowen Zhang,Rong Gong,Jiashen Li
出处
期刊:Polymer
[Elsevier]
日期:2021-06-01
卷期号:226: 123797-123797
被引量:23
标识
DOI:10.1016/j.polymer.2021.123797
摘要
Nanofibres with high surface area have various applications in many fields, such as filtration, tissue engineering and drug delivery. In the previous reported works, a lot of researchers have fabricated porous polymer nanofibres with porous surface structure, but few researchers could produce thoroughly hollow porous nanofibres by electrospinning. Here, we developed porous poly(l-lactide) (PLLA) fibres with good internal pore connection by two methods, i) removal of a pore-forming agent from PLLA composite fibres; ii) non-solvent induced re-crystallization of pure PLLA fibres. In the first method, electrospun PLLA/cellulose acetate butyrate (CAB) composite fibres were immersed into acetone to remove CAB. Results showed that the fibres with less CAB could produce porous structures. However, with the increasing of CAB content, the fibre surface had only a collapsed structure. In the second method, while pure PLLA fibres were immersed into acetone, the solvent-induced recrystallization of PLLA generated porous structures throughout the whole fibres. Owing to the higher crystallization, the mechanical properties of PLLA fibres were also highly improved.
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