Effects of F127 on Properties of PVB/F127 Blend Hollow Fiber Membrane via Thermally Induced Phase Separation  

作　　者：邱运仁 松山秀人 钟宏 叶红齐 黄可龙 

机构地区：[1]School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China [2]Department of Chemical Science and Engineering, Kobe University, Rokkodai, Nada-ku, Kobe 657-8501, Japan

出　　处：《Chinese Journal of Chemical Engineering》2010年第2期207-216,共10页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China（20776161）

摘　　要：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.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.

关 键 词：thermally induced phase separation hollow fiber membrane blend membrane poly（vinyl butyral） Pluronic F127 

分 类 号：TQ028.8[化学工程] TQ051.893