摘要
利用非溶剂相转化法(NIPS)制备聚偏氟乙烯(PVDF)超滤膜,考察了以多壁碳纳米管(MWCNT)、氧化石墨烯(GO)和聚乙烯醇(PVA)作为添加剂对膜性能的影响,并且进行膜污染实验。结果表明,PVA与GO和MWCNT形成氢键,能够提高GO和MWCNT的分散作用,提高其的亲水性,PVA能促使膜孔向指状孔发展,形成类似于毛细血管状结构。在相同的膜污染环境下,添加PVA的复合膜的通量恢复率更高,这是由于PVA能够在膜表面形成亲水层,使得膜表面与污染物之间的黏附力下降,抗污染能力提高。
In this experiment, polyvinylidene fluoride(PVDF)ultrafiltration membrane was prepared by non-solvent phase inversion(NIPS) method. The effect of carbon nanotubes(MWCNT), graphene oxide(GO) and polyvinyl alcohol(PVA) additives on the performance of membrane was investigated. The membrane fouling experiments were performed. The results showed that the formation of hydrogen bonds between PVA and GO, MWCNT improved the dispersion of GO and MWCNTs and improved their hydrophilicity;PVA promoted the development of membrane pores toward finger-like pores, forming capillary-like structure. Under the same membrane fouling environment, the flux recovery rate of the composite membrane with PVA was higher, because PVA formed hydrophilic layer on the membrane surface, which made the adhesion between the membrane surface and pollutants decrease and the anti-fouling ability improve.
作者
房平
李浩
FANG Ping;LI Hao(School of Urban Planning and Municipal Engineering,Xi’an Polytechnic University,Shaanxi Xi’an 710048,China)
出处
《当代化工》
CAS
2020年第1期79-82,86,共5页
Contemporary Chemical Industry
关键词
PVDF
PVA
MWCNT
GO
抗污染
Polyvinylidene fluoride(PVDF)
Polyvinyl alcohol(PVA)
Carbon nanotubes(MWCNT)
Graphene oxide(GO)
Pollution resistance
作者简介
房平(1975-),男,吉林省吉林市人,副教授,博士,2011年毕业于西安建筑科技大学环境工程专业,研究方向:从事水处理膜材料与技术方向工作。E-mail:469493@qq.com;通讯作者:李浩(1994-),男,硕士,研究方向:从事水处理膜材料与技术方向工作。E-mail:839838805@qq.com。
