吸水 poly (乙烯基 butyral )(PVB )/Pluronic F127 (F127 ) 混合空纤维膜经由热地导致的阶段分离(尖端) 被准备,并且吸水的 PVB/F127 的表演上的混合作文的效果相配空纤维膜被调查。到 PVB/polyethylene 乙二醇(木钉) 的 F127 的增加系统减少云点温度,当云点温度与 20% 的 F127 的增加稍微增加时(由质量) PVB/F127/PEG200 系统当 F127 的集中不比 5% 高时(由质量) 。轻散布结果证明周期的距离从 20% 的阶段分离形成了的起始的分裂期间(由质量) 有 F127 的增加的 PVB/F127/PEG200 系统减少,生长因此在冷却期间评价过程。在空气差距 5mm,水渗透增加和拒绝准备的空纤维膜几乎不随 F127 集中的增加改变的混合。为在零空气差距准备的膜, PVB/F127 混合膜的水渗透和拒绝比 PVB 膜的那些大,当张力的力量改变很少时。基本分析证明在聚合物答案罐头的大多数 F127 坚定地在聚合物矩阵存在,增加在 5mm 的空气差距准备的混合膜的 hydrophilicity。
Hydrophilic poly(vinyl butyral)(PVB) /Pluronic F127(F127) blend hollow fiber membranes were prepared via thermally induced phase separation(TIPS) ,and the effects of blend composition on the performance of hydrophilic PVB/F127 blend hollow fiber membrane were investigated.The addition of F127 to PVB/polyethylene glycol(PEG) system decreases the cloud point temperature,while the cloud point temperature increases slightly with the addition of F127 to 20%(by mass) PVB/F127/PEG200 system when the concentration of F127 is not higher than 5%(by mass) .Light scattering results show that the initial inter-phase periodic distance formed from the phase separation of 20%(by mass) PVB/F127/PEG200 system decreases with the addition of F127,so does the growth rate during cooling process.The blend hollow fiber membrane prepared at air-gap 5mm,of which the water permeability increases and the rejection changes little with the increase of F127 concentration.For the membrane prepared at zero air-gap,both water permeability and rejection of the PVB/F127 blend membrane are greater than those of PVB membrane,while the tensile strength changes little.Elementary analysis shows that most F127 in the polymer solution can firmly exist in the polymer matrix,increasing the hydrophilicity of the blend membrane prepared at air-gap of 5mm.