文献类型：期刊文献

英文题名：Fabrication of biodegradable poly (lactic acid)/carbon nanotube nanocomposite foams: Significant improvement on rheological property and foamability

作者：Li, Yang Yin, Dexian Liu, Wei Zhou, Hongfu Zhang, Yuxia Wang, Xiangdong

第一作者：Li, Yang

通信作者：Zhou, HF[1]

机构：[1]Beijing Technol & Business Univ, Sch Mat & Mech Engn, Beijing Key Lab Qual Evaluat Technol Hyg & Safety, Beijing 100048, Peoples R China;[2]Guizhou Inst Technol, Sch Mat & Met Engn, Guiyang 550003, Guizhou, Peoples R China

第一机构：Beijing Technol & Business Univ, Sch Mat & Mech Engn, Beijing Key Lab Qual Evaluat Technol Hyg & Safety, Beijing 100048, Peoples R China

通信机构：corresponding author), Beijing Technol & Business Univ, Sch Mat & Mech Engn, Beijing Key Lab Qual Evaluat Technol Hyg & Safety, Beijing 100048, Peoples R China.

年份：2020

卷号：163

起止页码：1175-1186

外文期刊名：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

收录：;Scopus(收录号：2-s2.0-85088091783);WOS:【SCI-EXPANDED(收录号:WOS:000579839600118)】；

基金：This work was supported by the National Natural Science Foundation of China (51703004 and 51703039), Top Young Innovative Talents Program of Beijing Municipal University (CIT&TCD201704041), and the School Level Cultivation Fund of Beijing Technology and Business University for Distinguished and Excellent Young Scholars (BTBUYP2020).

语种：英文

外文关键词：Poly (lactic acid); Multi-walled carbon nanotube; Nanocomposite; Foam; Rheological property

摘要：Recently, biodegradable macromolecules have been highly desired as a promising alternative for traditional oil-based plastics to work out the eco crisis and biological health problems triggered by microplastics. Herein, we presented a simple, effective, environmentally friendly and CO2-based foaming methodology for fabricating ultra-low-density poly (lactic acid)/carbon nanotube (PLA/CNTs) nanocomposite foam. By the gradual incorporation of CNTs, three kinds of networks generated in PLA/CNTs nanocomposites and had a distinct reinforcement influence on their melt viscoelasticity, which testified by transmission electron microscope, electrical conductivity and rheological property measurements, severally. Specifically, the storage modulus of PLA/CNTs nanocomposites were 3 orders of magnitude higher in contrast to pure PLA. Interestingly, relative to that under regular differential scanning calorimetry (DSC), a double melting peak phenomenon appeared in the high-pressure DSC curves of diverse PLA specimens. Biodegradable PLA/CNTs nanocomposite foam was successfully fabricated with a super-high volume expansion ratio (VER) of 49.6 times, which could offer a promising strategy for developing other thermoplastic polyester foams with ultra-high VER to obtain some unique functional attributes. (C) 2020 Elsevier B.V. All rights reserved.