酸腐蚀对聚丙烯非对称固液分离膜结构与性能的影响

对聚丙烯分离膜进行盐酸腐蚀处理后，得到不同处理浓度下分离膜各项性能的变化规律。通过对分离膜的形态结构、浸润性能和物理机械性能进行研究，结果表明：经过盐酸处理1d后，膜表面的浸润性均消失；在0.015 mol/L和0．025 mol/L的盐酸处理3 d后，分离膜导水率的保持率分别为50．33％和3．01％，此时膜的厚度均达到了最大值，较原样分别增加了14．75％和19．30％；在0．005、0．015 mol/L和0．025 mol/L的盐酸处理7 d后，断裂强度分别下降了5％、8．54％和12．19％，平均孔径分别下降了7．68％、11．98％和21．88％；而膜的接触角和透气率对盐酸浓度的变化不敏感。

The Impact of Acid Corrosion on Structure and Property of Polypropylene Asymmetric Solid-Liquid Separation Membrane

After hydrochloric acid corrosion of PP separation membrane ,the change laws of various properties of the separation membrane at different treatment concentrations are gained .The results show that the wettability of the membrane surface disappeared after it is treated by hydrochloric acid for 1 day ;the retention rates of the membrane＆#39;s hydraulic conductivity are 50 .33% and 3 .01% respectively after it is treated for 3 days by 0 .015 mol/L and 0 .025 mol/L hydrochloric acid ;and at this point ,the membrane thickness reached the maximum value and respectively increases by 14 .75% and 19 .30% ;the breaking strength respectively declined by 5% ,8 .54% and 12 .19% and the average pore diameter respectively de-clined by 7 .68% ,11 .98% and 21 .88% ,after it is treated for 7 days by the hydrochloric acid at 0 .005 mol/L ,0 .015 mol/L and 0 .025 mol/L ;the contact angle and permeability of the membrane are insensitive to variations in the concentration of hydrochloric acid .