脱硼功能性聚砜复合膜的制备与性能表征

Preparation and Characterization of Deborated Functional Polysulfone Composite Membrane

将多巴胺和聚乙烯亚胺共沉积在聚砜超滤膜表面,通过环氧丙醇与表面氨基基团进行环氧开环反应制备了具有邻羟基结构的复合膜;然后通过红外光谱表征了复合膜的表面化学结构,通过XPS表征了复合膜的表面元素及其含量,通过渗透性能测试表征了膜的水通量。结果表明:在0.1 MPa、25℃测试条件下,新型复合膜的水通量为45 L/(m^2·h),最大硼吸附量为1.6 mmol/g。

Composite membranes with o-hydroxyl structure were prepared by epoxy ring-opening reaction between propylene oxide and surface amino groups by co-deposition of dopamine and polyvinylimide on the surface of polysulfone ultrafiltration membrane.Then the surface chemical structure of the composite membrane was characterized by infrared spectroscopy,the surface elements and their contents were characterized by XPS,and the water flux of the membrane was characterized by permeability test.The results show that:the test pressure is 0.1 MPa,the temperature is 25℃,the water flux of PSF-OH membrane is 45 L/(m^2·h),and the maximum adsorption capacity of boron is 1.6 mmol/g.