CAJ | 학술논문

以三乙酸纤维素（CTA）为膜材料，1,4-二氧六环、丙酮为溶剂，甲醇、乳酸为添加剂，采用相转换法制备了三乙酸纤维素正渗透膜。研究了不同1,4-二氧六环/丙酮配比、添加剂乳酸含量、挥发时间、膜厚度、热处理温度条件下正渗透膜性能的变化规律。研究表明，当采用纯水为原料液，0.56mol/L CaCl2为汲取液时，优化制备的CTA正渗透膜的水通量达到14.10L/(m2·h)，溶质反扩散量为0.031mol/(m2·h)；采用0.1mol/L NaCl为原料液，4mol/L葡萄糖为汲取液时，优化制备的CTA正渗透膜的水通量保持在5L/(m2·h)以上，对NaCl的截留率大于99%。CTA正渗透膜相比于HTI膜，具有较高的亲水性、水通量、截留率，稳定性更好。
이삼을산섬유소（CTA）위막재료，1,4-이양륙배、병동위용제，갑순、유산위첨가제，채용상전환법제비료삼을산섬유소정삼투막。연구료불동1,4-이양륙배/병동배비、첨가제유산함량、휘발시간、막후도、열처리온도조건하정삼투막성능적변화규률。연구표명，당채용순수위원료액，0.56mol/L CaCl2위급취액시，우화제비적CTA정삼투막적수통량체도14.10L/(m2·h)，용질반확산량위0.031mol/(m2·h)；채용0.1mol/L NaCl위원료액，4mol/L포도당위급취액시，우화제비적CTA정삼투막적수통량보지재5L/(m2·h)이상，대NaCl적절류솔대우99%。CTA정삼투막상비우HTI막，구유교고적친수성、수통량、절류솔，은정성경호。
Cellulose triacetate based membranes for forward osmosis were prepared by immersion precipitation. The polymer solution consisted of cellulose triacetate as the membrane material, 1,4-dioxane and acetone as solvent,methanol and lactic acid as additives. Casting composition and preparation conditions-1,4-dioxane/acetone ratio,lactic acid content,evaporation time,casting thickness and annealing temperature-were tested for their effects on membrane performance. The optimized membrane showed 14.10L/(m2·h) water flux and 0.031mol/(m2·h) reverse solute flux using a feed solution of pure water and draw solution of 0.56mol/L CaCl2. When 0.1mol/L NaCl was used as the feed solution and 4mol/L glucose was used as the draw solution,water flux was above 5L/(m2·h) and rejection for NaCl was above 99%. The optimized membrane had a more hydrophilic surface, higher water flux,higher salt resistance and better membrane performance than the HTI membrane.