摘要
以甲基丙烯酸羟乙酯(HEMA)为单体、过硫酸钾-焦亚硫酸钠溶液为引发剂体系,通过在聚酰胺复合膜表面进行接枝聚合改性处理,得到亲水性聚酰胺复合反渗透膜.采用衰减全反射红外光谱、场发射扫描电子显微镜、接触角测量仪等仪器分别对膜表面的化学结构、表面形貌和亲水性能进行表征.结果表明,亲水性单体接枝改性提高了膜的亲水性和抗污染性能,且会影响膜的分离性能;当接枝单体HEMA溶液质量分数为4%时,制备的膜综合性能最好,脱盐率最高为99.67%,水通量为40.7 L/(m^2·h),亲水性和抗污染性能较好.
This study focuses on improving the properties of polyamide thin-film composite(TFC) reverse osmosis(RO) membranes by surface modification. The hydrophilic polyamide composite RO membrane was obtained by grafting hydroxyethyl methacrylate(HEMA) onto the surface of polyamide composite RO membrane by using potassium persulfate and sodium metabisulfite solution as the initiator. The chemical structure, surface morphology and hydrophilicity of the membrane material were characterized by attenuated total reflection infrared spectroscopy(ATR-FTIR), field emission scanning electron microscopy(SEM) and a contact angle measuring instrument, respectively. The results show that the HEMA-grafted membrane had better separation performance and hydrophilicity compared with the original membrane. When the concentration of the HEMA solution reaches 4%, the comprehensive performance of the grafted membrane is best, the desalination rate is as high as 99.67%, the water flux is 40.7 L/(m^2·h), the hydrophilic and the anti-fouling performance are good.
作者
胡群辉
周丰平
彭博
路宏伟
张海良
黄涛
喻慧
贺攀
HU Qunhui;ZHOU Fengping;PENG Bo;LU Hongwei;ZHANG Hailiang;HUANG Tao;YU Hui;HE Pan(Hunan Ovay Technology Co. Ltd., Zhuzhou 412000, China;Hunan Ovay Membrane Technoloygy Co., Ltd, Zhuzhou 412300, China;The College of Chemistry of Xiangtan University, Xiangtan 411105, China)
出处
《膜科学与技术》
CAS
CSCD
北大核心
2019年第1期22-27,共6页
Membrane Science and Technology
基金
湖南省创新创业技术投资项目(2017GK5013)
关键词
反渗透
表面接枝
膜
抗污染
分离
reverse osmosis
surface modification
membrane
antifouling
separation
