Preparation and thermal-mechanical property evaluation of cellulose insulation paper with differing nano-SiC contents  

作　　者：Yiyi Zhang Chuqi Xu Wenchang Wei Yuke Deng Shuangxi Nie Junwei Zha 

机构地区：[1]Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education,Guangxi University,Nanning,China [2]Guangxi Key Laboratory of Disaster Prevention and Engineering Safety,Guangxi University,Nanning,China [3]School of Light Industry and Food Engineering,Guangxi University,Nanning,China [4]School of Chemistry and Biological Engineering,University of Science&Technology Beijing,Beijing,China

出　　处：《High Voltage》2023年第3期599-610,共12页高电压（英文）

基　　金：The National Natural Science Foundation of China,Grant/Award Numbers:52277138,51867003;the Interdisciplinary Scientific Research Foundation of Guangxi University,Grant/Award Number:2022JCB008。

摘　　要：Cellulose insulation paper is the main component of oil-paper insulation systems in oilimmersed transformers.However,the poor thermal conductivity and thermal stability of the cellulose can lead to thermal ageing.It is critical to address this issue by improving the performance of cellulose,nano-SiC-modified cellulose models were established by molecular simulation,while nano-SiC composite papersheets were prepared based on the simulation results,and the effects of different contents of nano-SiC on the papersheets were investigated.Macroscopically,doping nano-SiC particles can enhance the thermal stability of cellulose;compared with the unmodified papersheet,the thermal conductivity and tensile strength of the modified papersheets are increased by 44.3%and 42.8%,respectively.The degree of polymerisation of the modified papersheet decreased more slowly than that of the unmodified papersheet under accelerated thermal ageing,showing that the modified papersheet has better anti-ageing properties.Microscopically,with the addition of nano-SiC,the simulations showed that the mean square displacement of the cellulose decreases dramatically and the distribution of the free volume becomes difficult to disperse,which corresponds to the decrease in porosity in the experiments.As a result,this research provides a way for improving the thermal-mechanical properties of cellulose that has practical application significance.

关 键 词：INSULATION THERMAL PROPERTY 

分 类 号：TB383[一般工业技术—材料科学与工程]