摘要
利用聚多巴胺二次功能化法,将单端氨基聚乙二醇(PEG-NH_(2))仿生固定于聚偏氟乙烯膜(PVDF)表面,构建具有优异抗污染性的PVDF膜。利用X射线光电子能谱仪、扫描电子显微镜、原子力显微镜研究了PEG-NH_(2)对PVDF膜表面结构、元素组成等进行表征分析,同时利用接触角、静态蛋白吸附、表面荷电性、动态渗透分离性能等分析了PEG-NH_(2)对PVDF膜表面抗污染性能的影响。结果表明,经过PEG-NH_(2)在PVDF膜表面的仿生修饰,改性膜表面亲水性增强,形成了稳定的抗污染改性层,膜表面粗糙度降低,增强了膜表面亲水性和抑制蛋白黏附性能,同时改性膜渗透分离性能显著提升,在水处理领域展示出潜在的应用前景。
Single-ended amino polyethylene glycol(PEG-NH_(2)) was biomimetic modified on the surface of polyvinylidene fluoride membrane(PVDF)by means of polydopamine secondary functionalization method to build anti-fouling PVDF membrane.The effect of PEG-NH_(2) on PVDF membrane surface structure and elementary composition was characterized and analyzed by X-ray photoelectron spectroscopy(XPS),scanning electron microscope(SEM)and atomic force microscope(AFM).Meanwhile,the effect of PEG-NH_(2) on anti-fouling performance of PVDF membrane was analyzed by water contact angle,static protein adsorption,surface charge and dynamic osmotic separation performance.The results showed that,after PEG-NH_(2) biomimetic modification,the hydrophilicity of the modified membrane surface was enhanced and a stable anti-pollution modified layer was formed.The results also indicated that,the surface roughness of the modified membrane was reduced and the hydrophilicity and anti-protein adhesion properties of the modified membrane surface were enhanced.At the same time,the permeability separation performance of the modified membrane is significantly improved,which showed a potential application prospect in the field of water treatment.
作者
韩永良
安子韩
刘丽妍
白静娜
HAN Yong-liang;AN Zi-han;LIU Li-yan;BAI Jing-na(Tianjin CNCLEAR Environmental Protection Technology Co.,Ltd.,Tianjin 300401,China;The Institute of Seawater Desalination and Multipurpose Utilization,MNR〈Tianjin〉,Tianjin 300192,China;School of Textile Science and Engineering,Tiangong University,Tianjin 300387,China)
出处
《盐科学与化工》
CAS
2022年第8期31-35,共5页
Journal of Salt Science and Chemical Industry
基金
中国博士后科学基金资助项目(2019M650999)。
关键词
单端氨基聚乙二醇
仿生修饰
聚偏氟乙烯膜
抗污染改性
Single-ended amino polyethylene glycol
Bionic modification
Polyvinylidene fluoride membrane
Anti-pollution modification
