發(fā)布時(shí)間：2019-01-24 20:36

【摘要】：以醋酸纖維素(CA)為成膜材料,不銹鋼網(wǎng)為支撐層,采用相轉(zhuǎn)化法制備CA正滲透膜。研究了CA濃度、溶劑和添加劑種類、凝固浴溫度、熱處理溫度及不銹鋼網(wǎng)目數(shù)對膜性能(水通量和截留率)的影響,并采用顯微鏡對膜的表面和斷面形貌進(jìn)行了表征。結(jié)果表明,當(dāng)CA質(zhì)量分?jǐn)?shù)為4%,溶劑為丙酮和1,4-二氧六環(huán)的混合溶劑,添加劑為甲醇和乳酸混合添加劑,凝固浴溫度為20℃,熱處理溫度為80℃,不銹鋼網(wǎng)目數(shù)為500目時(shí),所制備的正滲透膜性能最佳。利用0.1 mol/L的Na Cl為原料液,2 mol/L的葡萄糖為汲取液,室溫條件下,膜的分離層朝向原料液時(shí),所制備的正滲透膜的水通量為2.6 L/(m~2·h),對Na Cl的截留率為99.86%。
[Abstract]:Using cellulose acetate (CA) as film-forming material and stainless steel mesh as supporting layer, CA orthosmotic membrane was prepared by phase inversion method. The effects of CA concentration, solvents and additives, coagulation bath temperature, heat treatment temperature and mesh number of stainless steel on the film properties (water flux and retention) were studied. The surface and cross section morphology of the film were characterized by microscope. The results show that when the mass fraction of CA is 4, the solvent is a mixture of acetone and 1-dioxane, the additive is a mixture of methanol and lactic acid, the coagulation bath temperature is 20 鈩，

本文編號：2414832