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制备了聚氯乙烯(PVC)/N-(4-乙氧基亚甲基)-4~-丁基苯胺(EBBA)/全氟三丁胺(PFTA)三元复合膜,并对其氧气的选择透过性进行了研究。在这种膜体系中,PFTA 包含在 A-B-A 型嵌段共聚物(L44)的表面活性剂所形成的胶束中。含 PFTA的三元复合膜的氧渗透系数P_(0_2)大于不含PFTA 的双元膜。三元复合膜的P_(0_2)是10~(-9)～10~(-8)cm~3(STP)-cm~(-1)-sec~(-1)-cmHg~(-1),而分离系数 P_(O_2)/P_(N_2),在EBBA的各向同性或向列型温度范围内约为3.5～4.0。加入 PFTA能引起 P_(O_2)的增加,说明:PFTA 增加了氧在复合膜表面的溶解度,三元复合膜的 P_(O_2)/P_(N_2)—P_(O_2)关系表现出独特趋向,即P_(O_2)/P_(N_2)与 P_(O_2)是同时增加的。
The PVC / N- (4-ethoxymethylene) -4-butaniline (EBBA) / perfluorotributylamine (PFTA) ternary composite membrane was prepared and its oxygen We chose to study permeability. In this membrane system, PFTA is contained in the micelles formed by the surfactant of the A-B-A type block copolymer (L44). The oxygen permeability coefficient P_ (0_2) of PFTA-containing ternary composite membrane is larger than that of double membrane without PFTA. The P_ (0_2) value of the ternary composite membrane was in the range of 10 -9 to 10 -8 cm -3 (STP) -cm -1 -ccm -1 , While the separation coefficient P_ (O_2) / P_ (N_2) is about 3.5 ~ 4.0 in the isotropic or nematic temperature range of EBBA. The addition of PFTA can cause the increase of P_ (O_2), indicating that PFTA increases the solubility of oxygen on the surface of the composite membrane, and the P_ (O_2) / P_ (N_2) -P_ (O_2) P_ (O_2) / P_ (N_2) and P_ (O_2) increase at the same time.