摘要
为了提高活性炭纤维在高含水率下对二氯甲烷气体的吸附回收性能,以道康宁184为试剂,通过气相沉积工艺在活性炭纤维表面制备疏水涂层,并表征其结构,评价其疏水和吸附性能。表面处理样品ACF-P250与水的接触角达到126°,SEM检测结果也证实其表面沉积了低表面能物质聚二甲基硅氧烷。采用自制的溶剂回收吸附装置对改性样品ACFP250和原样ACF-YY进行动态吸附实验,结果显示,同样在100%~110%含水率条件下,ACF-P250的动态吸附量高81.2%。
The hydrophobic coating technique is attractive for the selective adsorption of dichloromethane on adsorbents under high humidity conditions due to a decrease in the affinity of water. In this study,ACF coated with hydrophobic PDMS films was used for effective adsorption of dichloromethane under high humidity conditions. The structural and elemental compositional changes of samples before and after PDMS coating were observed using SEM analysis. The results indicated that thin films consisting of a PDMS framework were likely formed on the ACF surface. In contrast to the results for ACF-YY,the water contact angle of ACF-P250 was measured to be 126°. The dynamic adsorption performance was evaluated using a self-made solvent recovery column.The results showed that the dynamic adsorption capacity of ACF-P250 increased by 81. 2% compared with that of ACF-YY under moisture conditions of 100% to 110%. Thus,the PDMS coating can increase the adsorption efficiency of ACF for dichloromethane under high humidity conditions.
出处
《环境工程学报》
CAS
CSCD
北大核心
2016年第10期5730-5734,共5页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(21376268)
中央高校基本科研业务费专项资金资助项目(15CX06050A)
中国石油大学(华东)创新工程资助项目(YCXJ2016055)
关键词
疏水涂层
活性炭纤维
二氯甲烷
溶剂回收
吸附
hydrophobic film
activated carbon fiber
dichloromethane
solvent recovery
adsorption
