接枝量对等离子体接枝聚异丙基丙烯酰胺开关的多孔膜的温度感应透过性的影响

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接枝量对等离子体接枝聚异丙基丙烯酰胺开关的多孔膜的温度感应透过性的影响

褚良银^a; 朱家骅^a; 陈文梅^a; NIITSUMA Takuya^b; YAMAGUCHI Takeo^b; NAKAO Shin-ichi^b

^a School of Chemical Engineering, Sichuan University, Chengdu 610065, China
^b Department of Chemical System Engineering, University of Tokyo, Tokyo 113-8656, Japan

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2003-06-28 发布日期:2003-06-28
通讯作者: 褚良银

Effect of Graft Yield on the Thermo-Responsive Permeability Through Porous Membranes with
Plasma-Grafted Poly (N-isopropylacrylamide) Gates

CHU Liangyin^a; ZHU Jiahua^a; CHEN Wenmei^a; NIITSUMA Takuya^b; YAMAGUCHI Takeo^b; NAKAO Shin-ichi^b

^a School of Chemical Engineering, Sichuan University, Chengdu 610065, China
^b Department of Chemical System Engineering, University of Tokyo, Tokyo 113-8656, Japan

Received:1900-01-01 Revised:1900-01-01 Online:2003-06-28 Published:2003-06-28
Contact: CHU Liangyin

摘要/Abstract

摘要： The effect of graft yield on both the thermo-responsive hydraulic permeability and the
thermo-responsivediffusional permeability through porous membranes with plasma-grafted
poly(N-isopropylacrylamide) (PNIPAM)gates was investigated. Both thermo-responsive flat
membranes and core-shell microcapsule membranes with a widerange of graft yield of PNIPAM
were prepared using a plasma-graft pore-filling polymerization method. The graftedPNIPAM
was formed homogeneously throughout the entire thickness of both the flat polyethylene
membranes andthe microcapsule polyamide membranes. Both the hydraulic permeability and the
diffusional permeability wereheavily dependent on the PNIPAM graft yield. With increasing
the graft yield, the hydraulic permeability (waterflux) decreases rapidly at 25℃ because
of the decrease of the pore size; however, the water flux at 40℃ increasesfirstly to a
peak because of the increase of hydrophobicity of the pore surface, and then decreases and
finally tends tozero because of the pore size becoming smaller and smaller. For the
diffusional permeability, the temperature showsdifferent effects on the diffusional
permeability coefficients of solutes across the membranes. When the graft yieldwas low, the
diffusional coefficient of solute across the membrane was higher at temperature above the
lower criticalsolution temperature (LCST) than that below the LCST; however, when the graft
yield was high, the diffusionalcoefficient was lower at temperature above the LCST than
that below the LCST. It is very important to choose ordesign a proper graft yield of PNIPAM
for obtaining a desired thermo-responsive "on/of" hydraulic or diffusionalpermeability.

关键词: thermo-responsive membrane;poly(N-isopropylacrylamide);plasma-graft pore-filling polymerization;graft yield;hydraulic permeability;diffusional permeability

Abstract: The effect of graft yield on both the thermo-responsive hydraulic permeability and the
thermo-responsivediffusional permeability through porous membranes with plasma-grafted
poly(N-isopropylacrylamide) (PNIPAM)gates was investigated. Both thermo-responsive flat
membranes and core-shell microcapsule membranes with a widerange of graft yield of PNIPAM
were prepared using a plasma-graft pore-filling polymerization method. The graftedPNIPAM
was formed homogeneously throughout the entire thickness of both the flat polyethylene
membranes andthe microcapsule polyamide membranes. Both the hydraulic permeability and the
diffusional permeability wereheavily dependent on the PNIPAM graft yield. With increasing
the graft yield, the hydraulic permeability (waterflux) decreases rapidly at 25℃ because
of the decrease of the pore size; however, the water flux at 40℃ increasesfirstly to a
peak because of the increase of hydrophobicity of the pore surface, and then decreases and
finally tends tozero because of the pore size becoming smaller and smaller. For the
diffusional permeability, the temperature showsdifferent effects on the diffusional
permeability coefficients of solutes across the membranes. When the graft yieldwas low, the
diffusional coefficient of solute across the membrane was higher at temperature above the
lower criticalsolution temperature (LCST) than that below the LCST; however, when the graft
yield was high, the diffusionalcoefficient was lower at temperature above the LCST than
that below the LCST. It is very important to choose ordesign a proper graft yield of PNIPAM
for obtaining a desired thermo-responsive "on/of" hydraulic or diffusionalpermeability.

Key words: thermo-responsive membrane, poly(N-isopropylacrylamide), plasma-graft pore-filling polymerization, graft yield, hydraulic permeability, diffusional permeability

褚良银, 朱家骅, 陈文梅,NIITSUMA Takuya, YAMAGUCHI Takeo, NAKAO Shin-ichi. 接枝量对等离子体接枝聚异丙基丙烯酰胺开关的多孔膜的温度感应透过性的影响[J]. CIESC Journal.

CHU Liangyin, ZHU Jiahua, CHEN Wenmei, NIITSUMA Takuya, YAMAGUCHI Takeo, NAKAO Shin-ichi. Effect of Graft Yield on the Thermo-Responsive Permeability Through Porous Membranes with
Plasma-Grafted Poly (N-isopropylacrylamide) Gates[J]. .

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接枝量对等离子体接枝聚异丙基丙烯酰胺开关的多孔膜的温度感应透过性的影响

Effect of Graft Yield on the Thermo-Responsive Permeability Through Porous Membranes with
Plasma-Grafted Poly (N-isopropylacrylamide) Gates

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接枝量对等离子体接枝聚异丙基丙烯酰胺开关的多孔膜的温度感应透过性的影响

Effect of Graft Yield on the Thermo-Responsive Permeability Through Porous Membranes with Plasma-Grafted Poly (N-isopropylacrylamide) Gates

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Effect of Graft Yield on the Thermo-Responsive Permeability Through Porous Membranes with
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