摘要
研究了羟丙基醋酸纤维素反渗透膜的制膜工艺和膜性能。实验表明,以甘油—正丙醇或磷酸为添加剂,蒸发时间30—60s,热处理温度70℃,时间3—5 min,可得到在2 MPa 操作压力下,氯化钠脱除率95—98%,水通量1.0—2.1 ml/cm^2·h的反渗透膜。羟丙基醋酸纤维素膜具有一定的耐热性,其使用温度上限比醋酸纤维素膜至少提高了10℃以上。羟丙基醋酸纤维素的溶解性能与醋酸纤维素相似。x—射线衍射和热重分析显示羟丙基醋酸纤维素具有与醋酸纤维素相似的聚集态结构。
The casting process and reverse osmosis (RO) properties of hydroxy-propyl cellulose acetate (HPCA) membrane were studied.It was found thatthe suitable conditions for casting HPCA RO membrane were using glyce-rine-n-propanol or phosphoric acid as additive,evaperating for 30-60 seconds,and pre-treating with 70℃ water for 3—5 min.The membranes have theperformance of 95—98% rejection of NaCl and 1.0—2.1 ml/(cm^2·h) of waterflux when the operating pressure is 2MPa.The HPCA RO mambrane couldbe used at higher working temperature as cpmpared with CA membrane.The solubility of HPCA in organic solvents is almost the same as that ofCA.X-ray and TGA data show that the HPCA has almost the same aggre-gate structure as CA.
出处
《水处理技术》
CAS
CSCD
北大核心
1992年第2期123-129,共7页
Technology of Water Treatment
基金
广州化学所纤维素化学开放研究室资助项目
关键词
醋酸纤维素
反渗透膜
膜性能
hydroxypropyl cellulose acetate
reverse osmosis
membrane
membrane property
