溶液环境中疏水性聚丙烯膜结构性能的变化

通过浸渍方法研究了疏水性聚丙烯膜在不同种类溶液环境中膜结构的变化,采用元素分析、机械强度和渗透通量测定等手段,表征了一乙醇胺(MEA)、甘氨酸盐(GLY)、氢氧化钾(KOH)和水(H_2O)对疏水性聚丙烯膜结构的影响.结果表明:在3种不同性质的溶液中,膜组成中的H元素变化最大;溶液浓度增大,元素变化趋势增大;在相同浸渍时间内,溶液对疏水性聚丙烯膜机械强度的影响次序为MEA高于GLY高于KOH;与无机溶液相比较,有机溶液的影响较大;疏水性聚丙烯膜经过溶液浸渍后,渗透通量均有所提高,其中MEA溶液对渗透通量影响最大,H_2O对其影响未显示.

Structure Performance Changes of Hydrophobic Polypropylene Membrane in Solution Environment

Structure changes of hydrophobic polypropylene membrane are investigated by dipping the hydrophobic polypropylene membrane into different types of solutions. Effects of monoethanolamine (MEA), glycinate (GLY), potassium hydroxide (KOH) and water (H_2O) on the structure of hydrophobic polypropylene membrane are characterized by means of element analysis, mechanical intensity and penetration flux determinations. The results show that: the change of element H in the membrane components is the largest after the membrane dipped in the three solutions; the change trend of elements of the membrane components increases with the increase of solution concentrations; the effect order of the solutions from big to small on mechanical intensity of the membrane is MEA, GLY and KOH within the same dipping time. Effects of organic solutions on mechanical intensity are bigger than those of inorganic solutions. Penetration fluxes of the membrane increase after the hydrophobic polypropylene membrane are dipped in solutions. Among the effects on penetration flux, the effect of aqueous MEA on the penetration flux is the largest, and the effect of H_2O on the penetration flux is unshown.