Electrically conductive and light-weight branched polylactic acid-based carbon nanotube foams

被引：14
作者：
Liu, Wei [1 ]
Wu, Xian [1 ]
Ou, Yangjia [1 ]
Liu, Hao [1 ]
Zhang, Chun [1 ]
机构：
[1] Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang 550003, Peoples R China
来源：
E-POLYMERS | 2021年 / 21卷 / 01期
基金：
中国国家自然科学基金;
关键词：
foams; biopolymers; branched; nanofibers; conducting polymers; LOW-DENSITY; MECHANICAL-PROPERTIES; CRYSTAL-STRUCTURE; COMPOSITE FOAMS; ALPHA-FORM; BEHAVIOR; NANOCOMPOSITES; PERFORMANCE; MORPHOLOGY; NETWORK;
D O I：
10.1515/epoly-2021-0013
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
In spite of the high electrical conductivity of carbon nanotube (CNT), its tendency to aggregate and expensive cost in fabricating aerogel, foams, and porous materials remains a problem. Therefore, we described a simple and feasible way to design light-weight, high electrically conductive, and cost-efficient polylactic acid (PLA)/CNT foams. The branched PLA (BPLA) resin with excellent melt elasticity and foamability was induced by nucleophilic ring-opening reaction of epoxy-based acrylic/styrene copolymer and PLA. After that, BPLA/CNT composites and foams were prepared by melt-mixing and supercritical carbon dioxide foaming technology, respectively. The thermal, electrical, and foaming properties were studied. The resultant BPLA/CNT foam possessed a low density of 0.174 g/cm(3) and high crystallinity of 3.03%. An improvement of the oriented structure of CNT induced by cell growth in BPLA matrix increased the conductivity of the foam up to 3.51 x 10(4) Omega/m. The proposed foaming materials provided a way for designing and preparing high performance CNT products.
引用
收藏
页码：96 / 107
页数：12
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