摘要
将聚苯乙烯（ＰＳ）和乙基纤维素（ＥＣ）溶于ＣＨ_２Ｃｌ_２中，利用水中干燥法制备ＰＳ－ＥＣ复合膜微胶囊。当复合膜的微孔中含有磷酸三丁酯（ＴＢＰ）时，微胶囊膜对Ｃｒ_２Ｏ_７^（２－）具有传输功能。芯材采用高浓度ＮａＯＨ时，可使Ｃｒ_２Ｏ_７^（２－）逆浓差传输。研究了ＰＳ和ＥＣ的比例、微胶囊粒径、ＮａＯＨ浓度及ＴＢＰ含量对传输的影响．在适当条件下，１０ｍｉｎ内Ｃｒ_２Ｏ_７^（２－）的浓度由１×１０^（－４）ｍｏｌ／Ｌ降至１×１０^（－７）ｍｏｌ／Ｌ以下。
PS(polystyrene) and EC(ethyl cellulose) were dissolved with CH_2Cl_2,and PS-EC microcapsule was prepared by means of drying in water.When the tiny pores of the film contain TBP(tributyl phosphate),it shows the function transferring .Cr_2O_7￣(2-) We investigated the effect of proportions of PS and EC, the radii of microcapsule,and the concentrations of NaOH and TBP.The results show that the concentration of was dropped down in l0min from 1×10￣(-4) mol/L to 1×10￣(-7)mol/L under the appropriate conditions.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1994年第7期1034-1037,共4页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
微胶囊
铬离子传输
PS-EC复合膜
Microcapsule,Polystyrene,Ethyl cellulose.Transfer of chromium ion
