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以聚砜超滤膜为底膜,间苯二胺为水相单体,均苯三甲酰氯为有机相单体,通过界面聚合的方法制备了聚酰胺反渗透复合膜。研究了有机相共溶剂1,3-二甲基-2-咪唑啉酮、N,N-二甲基丙烯基脲、磷酸三丁酯对聚酰胺反渗透复合膜表面形貌及分离性能的影响。扫描电子显微镜观察表明,共溶剂的存在有助于复合膜表面形成“叶片状”结构;傅里叶变换红外光谱仪则对聚酰胺分离层化学结构进行了分析。通过改变共溶剂的种类和含量,可有效改变聚酰胺复合膜的表面形貌,最终调控膜的水通量和截留率。
Polysulfone ultrafiltration membrane as the basement membrane, m-phenylenediamine as the water-phase monomer, trimesoyl chloride as the organic phase monomer, prepared by interfacial polymerization of polyamide reverse osmosis composite membrane. The effects of organic phase co-solvents such as 1,3-dimethyl-2-imidazolidinone, N, N-dimethylpropenyl urea and tributyl phosphate on the surface morphology and separation performance of polyamide reverse osmosis composite membranes . Scanning electron microscopy showed that the presence of co-solvent contributed to the formation of “leaf-like ” structure on the surface of the composite membrane; Fourier transform infrared spectroscopy analysis of the chemical structure of polyamide separation layer. By changing the type and content of the co-solvent, the surface morphology of the polyamide composite membrane can be effectively changed, and finally the membrane water flux and the rejection rate can be regulated.