摘要
依次采用浸渍法与原位聚合法在玄武岩纤维表面均匀负载铁酸钴(CoFe_(2)O_(4))纳米粒子,后经充磁处理后制备成磁性玄武岩功能滤料。在此基础上,分别采用SEM、VSM、FTIR、XRD等表征方法分析了磁性玄武岩滤料中CoFe_(2)O_(4)纳米颗粒的分布形态、剩磁及矫顽力大小、纤维表面官能团的作用机制及CoFe_(2)O_(4)负载结晶度。接着将原位聚合法制得的磁性玄武岩滤料在高温中处理24 h,并依次对原始玄武岩滤料、磁性玄武岩滤料及高温处理的磁性玄武岩滤料进行过滤性能实验。结果发现:相较于浸渍法,通过原位聚合法制备的磁性玄武岩滤料剩磁更强,CoFe_(2)O_(4)纳米粒子负载结晶度更好;250℃高温处理的磁性玄武岩滤料过滤性能最佳,对PM2.5的过滤效率达到了92.1%,相较原始玄武岩滤料提高了33.9%;同时原始玄武岩滤料过滤阻力低于磁性玄武岩滤料,但随着滤料粉尘负荷的增大,磁性玄武岩滤料的磁性粒子对滤料过滤阻力的影响变小。
Cobalt ferrite(CoFe_(2)O_(4))nanoparticles are successfully loaded on the surface of basalt fiber by impregnation method and in-situ polymerization method respectively.The magnetic basalt functional fiber filter material is prepared after magnetization treatment.SEM,VSM,FTIR,XRD and other characterization methods are used to analyze the distribution morphology,the remanence and coercivity of CoFe_(2)O_(4)nanoparticles in the magnetic basalt filter material,the action mechanism of functional groups on the fiber surface,and the crystallinity of CoFe_(2)O_(4).Then,the magnetic basalt filter material prepared by the in-situ polymerization method is treated at different high temperature for 24 hours.Filtration performance experiments are conducted for primary basalt filter material,the magnetic basalt filter material and the high-temperature treated magnetic basalt filter material.The results show that the magnetic basalt filter material prepared by the in-situ polymerization method has stronger remanence compared with the impregnation method,and the crystallinity of CoFe_(2)O_(4)nanoparticles on basalt filter is better.The magnetic basalt filter material treated at 250°C shows the best filtration efficiency of 92.1%for PM2.5 removal,which is higher than the primary basalt filter material with efficiency of 33.9%.At the same time,the filtration resistance of the primary basalt filter material is lower than magnetic basalt filter material,but with the increase of the dust load of the filter material,the magnetic particles of the magnetic basalt filter material have less influence on the filter resistance of basalt filter material.
作者
杨炳文
刁永发
杨学宾
周发山
费建信
YANG Bingwen;DIAO Yongfa;YANG Xuebin;ZHOU Fashan;FEI Jianxin(College of Environmental Science and Engineering,Donghua University,Shanghai 201620,China;Jiangsu Xiankai New Material Co.,Ltd.,Xinghua 225755,China)
出处
《功能材料》
CAS
CSCD
北大核心
2021年第8期8144-8150,共7页
Journal of Functional Materials
基金
国家重点研发计划资助项目(2018YFC0705300)
中央高校基本科研业务费重点资助项目(2232017A-09,CUSF-DH-D-2017097)。
关键词
玄武岩纤维
纳米铁酸钴
耐高温
PM2.5
磁性滤料
basalt fiber
nano cobalt ferrite
high temperature resistance
PM2.5
magnetic filter material
作者简介
杨炳文(1995-),男,江西九江人,硕士研究生,师承刁永发教授,从事磁性滤料研究;通讯作者:刁永发,E-mail:diaoyongfa@dhu.edu.cn。
