低温氮等离子体改性聚丙烯腈超滤膜及其光谱诊断  

Polyacrylonitrile ultrafiltration membrane modified by low temperature N_2 plasma and its spectral diagnosis

作　　者：李秋怡[1] 李茹[1] 樊琰[1] 张琪 李青 

机构地区：[1]西安工程大学环境与化学工程学院,陕西西安710048

出　　处：《西安工程大学学报》2017年第6期752-757,共6页Journal of Xi’an Polytechnic University

基　　金：国家自然科学基金资助项目(11105102);陕西省教育厅科研资助项目(12JK0651)

摘　　要：针对超滤膜的抗污染能力及亲水性问题,采用低温氮等离子体对聚丙烯腈(PAN)超滤膜进行表面改性,并对改性过程进行等离子体光谱诊断.通过测定改性前后接触角的变化表征膜表面的亲水性;利用膜通量、截留率、通量衰减率等表征超滤膜的过滤及抗污染性能.结果表明,当最佳处理条件为功率100 W,时间90s时,水接触角由原始膜的57°下降至17°.改性膜亲水性及抗污染性能进一步提高.等离子体改性时电子温度与放电功率呈现负相关,与反应室内部压强呈正相关.To improve the anti-pollution ability and hydrophilicity of ultrafiltration membrane,the polyacrylonitrile(PAN)ultrafiltration membrane was modified by low temperature nitrogen plasma,and the plasma was diagnosed during the modification process.The hydrophilization of the membrane surface was characterized by the change of the contact angle before and after modification.And the membrane flux,rejection rate and flux decay rate were used to characterize the filtration and anti-fouling properties of ultrafiltration membrane.The results show that when the best treatment condition is power 100 Wand time 90 s,water contact angle declines from 57°of the original membrane down to 17°.The hydrophilicity of the modifiedmembrane,and the anti-pollution performance are remarkably improved.The electron temperature is negatively correlated with the discharge power during plasma modification,and positively correlates with the pressure inside the reaction chamber.

关 键 词：聚丙烯腈超滤膜 等离子体改性 抗污染 光谱诊断 

分 类 号：TQ301.6[化学工程]