文献类型：期刊文献

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

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

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[2]Natl Light Ind Council, Key Lab Biobased Mat Engn China, Shanghai 200237, Peoples R China;[3]Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China;[4]East China Univ Sci & Technol, Sch Biotechnol, Shanghai 200237, Peoples R China

年份：2020

卷号：38

期号：1

起止页码：53

外文期刊名：CHINESE JOURNAL OF POLYMER SCIENCE

收录：;EI(收录号：20212810632635);WOS:【SCI-EXPANDED(收录号:WOS:000503827700007)】；

语种：英文

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.