Synthesis of high-purity mesoporous nanosilica microspheres from retired composite insulators based on orthogonal experiment  

作　　者：Rongxin Chen Li Cheng Yunfan Liu Liang Yu Ruijin Liao Tingting Wang 

机构地区：[1]School of Electrical Engineering,Chongqing University,Chongqing,China [2]State Key Laboratory of Power Transmission Equipment and System Security and New Technology,Chongqing University,Chongqing,China [3]Electric Power Research Institute of China Southern Power Grid,Guangzhou,Guangdong Province,China

出　　处：《High Voltage》2022年第6期1111-1122,共12页高电压（英文）

基　　金：National Natural Science Foundation of China,Grant/Award Number:52077013;Science and Technology Project of Electric Power Research Institute of China Southern Power Grid CO.,Grant/Award Number:066600KK52190015 and 1500002020030101JC0074;Graduate Research and Innovation of Chongqing,China,Grant/Award Number:CYS21014。

摘　　要：Silicone rubber is an indispensable insulation material for power equipment and is difficult to degrade naturally,posing a serious threat to the environment.It remains challenging to dispose this alarming amount of waste.In our previous research,a green pyrolysis recycling method was proposed for waste composite insulators.In this article,the experimental device was further improved,and the recycling process was optimised by orthogonal experiments to obtain nanosilica microspheres(NSMs)with higher purity and controllable particle size for the state-of-the-art engineering applications.Firstly,the effect of three factors(calcination temperature,constant-temperature duration,and heating rate)on the particle size of NSMs were investigated by single-factor analysis.ANOVA and response analyses were then used to examine the goodness of fit of the multi-parameter fitting equation and the interaction impact of multiple factors on the particle size.Finally,homogeneous mesoporous NSMs with higher purity(increased from 97%to 99%)and smaller particle size(decreased from 160 to 103 nm were prepared under the guidance of model.The SiO_(2)-recovery rate of this method was 74.7%,revealing superior economic value.

关 键 词：PURITY SILICA INSULATOR 

分 类 号：O62[理学—有机化学]