文献类型：期刊文献

中文题名：Bio-based and Biodegradable Electrospun Fibers Composed of Poly(L-lactide) and Polyamide 4

英文题名：Bio-based and Biodegradable Electrospun Fibers Composed of Poly(L-lactide) and Polyamide 4

作者：Tao Chen[1,2,3];Guo-Cheng Zhong[1,3];Yuan-Ting Zhang[1,3];Li-Ming Zhao[2,4];Yong-Jun Qiu[2,4]

机构：[1]School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China;[2]Key Laboratory of Bio-based Material Engineering of China National Light Industry Council,Shanghai200237,China;[3]Shanghai Key Laboratory of Advanced Polymeric Materials,Shanghai200237,China;[4]School of Biotechnology,East China University of Science and Technology,Shanghai200237,China

年份：2020

卷号：38

期号：1

起止页码：53

中文期刊名：Chinese Journal of Polymer Science

外文期刊名：高分子科学（英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2019_2020】；

基金：financially supported by the National Key Research and Development Program of China (Nos. 2017YFB0309301 and 2017YFB0309302);the Natural Science Foundation of Shanghai, China (No. 17ZR1407200)

语种：英文

中文关键词：Poly(L-lactide);Polyamide 4;"Click"reaction;Electrospinning;Fiber

外文关键词：Poly(L-lactide);Polyamide 4;"Click" reaction;Electrospinning;Fiber

摘要：Novel bio-based and biodegradable block copolymers were synthesized by "click" reaction between poly(L-lactide)(PLLA) and polyamide 4(PA4). Upon tuning the molar mass of PLLA block, the properties of copolymers and electrospun ultrafine fibers were investigated and compared with those of PLLA and PA4 blends. PLLA and PA4 were found incompatible and formed individual crystalline regions, along with reciprocal inhibition in crystallization. Electrospun fibers were highly hydrophobic, even if hydrophilic PA4 was the rich component. The crystallinity of either PLLA or PA4 decreased after electrospinning and PLLA-rich as-spun fibers were almost amorphous. Immersion tests proved that fibers of block copolymers were relatively homogeneous with micro-phase separation between PLLA and PA4. The fibrous structures of copolymers were different from those of the fibers electrospun from blends, for which sheath-core structure induced by macro-phase separation between homopolymers of PLLA and PA4 was confirmed by TEM, EDS, and XPS.
Novel bio-based and biodegradable block copolymers were synthesized by "click" reaction between poly(L-lactide)(PLLA) and polyamide 4(PA4). Upon tuning the molar mass of PLLA block, the properties of copolymers and electrospun ultrafine fibers were investigated and compared with those of PLLA and PA4 blends. PLLA and PA4 were found incompatible and formed individual crystalline regions, along with reciprocal inhibition in crystallization. Electrospun fibers were highly hydrophobic, even if hydrophilic PA4 was the rich component. The crystallinity of either PLLA or PA4 decreased after electrospinning and PLLA-rich as-spun fibers were almost amorphous. Immersion tests proved that fibers of block copolymers were relatively homogeneous with micro-phase separation between PLLA and PA4. The fibrous structures of copolymers were different from those of the fibers electrospun from blends, for which sheath-core structure induced by macro-phase separation between homopolymers of PLLA and PA4 was confirmed by TEM, EDS, and XPS.