中国电机工程学报2017，Vol.37Issue(15)：4548-4556,9.DOI:10.13334/j.0258-8013.pcsee.161907
基于分子模拟的绝缘纸高温裂解过程水分产生及其破坏作用研究
Study on H2O Formation During the Pyrolysis of Insulating Paper and Its Destructive Effect Based on Molecular Simulation
摘要
Abstract
A large amount of water is produced in the pyrolysis process of insulating paper.ReaxFF molecular dynamics simulation was introduced to study the formation mechanism of H2O molecule and the destruction of moisture on insulating paper.In the pyrolysis process,many H2O molecules were generated.H2O molecules increased with time,but the number of H2O molecules fluctuated obviously in some time intervals due to the disappearance and regeneration of some H2O molecules.The dehydration reaction was divided into three ways because of the O atoms in different positions have different activities:H captured by secondary alcohol hydroxyl;H captured by the O atom of ether group;H captured by primary alcohol hydroxyl.Finally,the destruction of moisture on insulating paper was simulated using molecular dynamics.H2O molecules moved in the free space of cellulose chains and many hydrogen bonds were formed,which bounded the movement of the H2O molecules.The hydrogen bonding network of cellulose was also destroyed.The simulation results coincided well with the experimental conclusions,which may provide references for analysis of overheating fault on transformer.It also showed that it is an effective method to research on the aging process and modification of insulating polymer materials by using molecular simulation method.关键词
绝缘纸/高温裂解/水分/破坏作用/氢键/分子模拟Key words
insulating paper/pyrolysis/moisture/destruction/hydrogen bond/molecular simulation分类
信息技术与安全科学引用本文复制引用
赵彤,石雷,张远涛,邹亮,张黎..基于分子模拟的绝缘纸高温裂解过程水分产生及其破坏作用研究[J].中国电机工程学报,2017,37(15):4548-4556,9.基金项目
国家自然科学基金项目(51407110、 51677110).Projects Supported by National Natural Science Foundation of China (51407110,51677110). （51407110、 51677110）
