Mechanically Robust Polylactide Fibers with Super Heat Resistance via Constructing in situ Nanofibrils  

作　　者：Jun Lu Li-Xiang Yi Yong-Huan Zhao Yang Meng Peng-Xiang Yu Juan-Juan Su Jian Han 

机构地区：[1]College of Materials and Textiles,Zhejiang Sci-Tech University,Hangzhou 310018,China [2]The Key Lab of Industrial Textile Material and Manufacturing Technology,Zhejiang Province,Zhejiang Sci-Tech University,Hangzhou 310018,China

出　　处：《Chinese Journal of Polymer Science》2023年第6期962-971,I0011,共11页高分子科学（英文版）

基　　金：financially supported by the Natural Science Foundation of Zhejiang Province(No.LGG21E030013);Postdoctoral Research Foundation of China(No.2019M662111)。

摘　　要：All-PLA fibers with excellent comprehensive performance and recycling convenience are realized efficiently.High molecular weight poly(D-lactide)(HPDLA)is incorporated into poly(L-lactide)(PLLA)matrix to construct in situ nanofibrils structure by taking advantages of the microphase separation between HPDLA and PLLA.The tensile strength of HPDLA/PLLA composite fibers(HDL-8)is enhanced from 2.1 cN/dtex of neat PLLA-8 fibers up to 2.9 cN/dtex.Its boiling water shrinkage(BWS)and shrinkage in hot air(HAS)significantly decrease to 7.8%and 2.8%,respectively.The abundance of in situ nanofibrils creates a grille-like structure that is crucial for both heat and hydrolysis resistance.More strikingly,a hybrid shish-kebab structure induced by the in situ nanofibrils serves as a mechanical reinforcement.This work paves a new way for heat resistance and self-reinforcement modification of PLA materials.

关 键 词：materials. fibers LACTIDE 

分 类 号：TQ342[化学工程—化纤工业]