Citation: Tao Chen, Guo-Cheng Zhong, Yuan-Ting Zhang, Li-Ming Zhao, Yong-Jun Qiu. Bio-based and Biodegradable Electrospun Fibers Composed of Poly(L-lactide) and Polyamide 4[J]. Chinese Journal of Polymer Science, ;2020, 38(1): 53-62. doi: 10.1007/s10118-019-2299-8 shu

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

Tao Chen ^a,b,c,, ,
Guo-Cheng Zhong ^a,c ,
Yuan-Ting Zhang ^a,c ,
Li-Ming Zhao ^b,d ,
Yong-Jun Qiu ^b,d

a.
School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
b.
Key Laboratory of Bio-based Material Engineering of China National Light Industry Council, Shanghai 200237, China
c.
Shanghai Key Laboratory of Advanced Polymeric Materials, Shanghai 200237, China
d.
School of Biotechnology, East China University of Science and Technology, Shanghai 200237, China

Corresponding author: Tao Chen, tchen@ecust.edu.cn
Received Date: 22 March 2019
Revised Date: 7 May 2019
Available Online: 19 September 2019

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.
- Poly(L-lactide),
- Polyamide 4,
- " Click” reaction,
- Electrospinning,
- Fiber
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