Defect reduction to enhance the mechanical strength of nanocellulose carbon aerogel  

作　　者：Haihong Lai Zehong Chen Hao Zhuo Yijie Hu Xuan Zhao Jiwang Yi Hongzhi Zheng Ge Shi Yifan Tong Ling Meng Xinwen Peng Linxin Zhong 

机构地区：[1]State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou 510641,China [2]Huangpu Hydrogen Energy Innovation Center/Guangzhou Key Laboratory for Clean Energy and Materials,School of Chemistry and Chemical Engineering,Guangzhou University,Guangzhou 510006,China

出　　处：《Chinese Chemical Letters》2024年第1期492-498,共7页中国化学快报（英文版）

基　　金：the National Natural Science Foundation of China(Nos.32201499,22208069 and 32071714);Guangdong Basic and Applied Basic Research Foundation(No.2021A1515110205);Fundamental Research Funds for the Central Universities(No.2022ZYGXZR019);the State Key Laboratory of Pulp&Paper Engineering(No.2022C01).

摘　　要：Carbon aerogels prepared from renewable nano building blocks are rising-star materials and hold great promise in many fields.However,various defects formed during carbonization at high temperature disfavor the stress transfer and thus the fabrication of flexible carbon aerogel from renewable nano building blocks.Herein,a structural defect-reducing strategy is proposed by altering the pyrolysis route of cellulose nanofiber.Inorganic salt that inhibits the generation of tar volatilization during pyrolysis can prevent the formation of various structural defects.Microstructure with fewer defects can reduce stress concentration and remarkably enhance the compressibility of carbon aerogel,thus increasing the maximum stress retention of carbon aerogel.The carbon aerogel also has high stress sensor sensitivity and excellent temperature coefficient of resistance.The structural defect-reducing strategy will pave a new way to fabricate high-strength carbon materials for various fields.

关 键 词：Biomass Cellulose nanofiber PYROLYSIS RENEWABLE Carbon aerogel 

分 类 号：TQ427.26[化学工程]