Formation of Poroas Membrane by Phase soparation with Supercritica/CO_2
Supercritica/CO_2相分离形成Poroas膜
基本信息
- 批准号:11450299
- 负责人:
- 金额:$ 4.16万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (B).
- 财政年份:1999
- 资助国家:日本
- 起止时间:1999 至 2000
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Microporous polystyrene membranes were prepared by the phase separation process using the supercritical CO_2 as a nonsolvent for the polymer solution. The thin polymer solution in a laboratory dish was located inside a cell and the supercritical CO_2 was introduced to induce the phase separation. The dry flat microporous membranes were obtained without collapse of the structure after the CO_2 pressure was diminished. Effects of the experimental conditions such as the CO_2 pressure, the polymer concentration and the temperature on the average pore size and membrane porosity were investigated.In the preparation of porous cellulose acetate membrane by phase separation with supercritical CO_2, five kinds of diluents were used and effect of the diluent on the membrane structure and performance was investigated. As the mutual affinity between diluent and supercritical CO_2 decreased, the membrane porosity and the average pore size near the center position increased and the thicker skin layer was formed at the top surface. In all cases, macrovoid was not formed, although the phase separation occurred instantaneously after CO_2 was introduced. This was a contrast to the macrovoid formation in the condition of instantaneous phase separation using water as nonsolvent. The membrane performances such as the solute rejection coefficient and the water permeability were measured for the obtained porous membranes.
以超临界CO_2为非溶剂,采用相分离法制备了聚苯乙烯微孔膜。将实验皿中的聚合物稀溶液置于池中,引入超临界CO_2以诱导相分离。降低CO2压力后,得到了干燥的平板微孔膜,膜结构没有塌陷。考察了CO_2压力、聚合物浓度、温度等实验条件对膜平均孔径和孔隙率的影响,并在超临界CO_2相分离法制备醋酸纤维素多孔膜中,选用了5种稀释剂,考察了稀释剂对膜结构和性能的影响。随着稀释剂与超临界CO2之间亲和力的降低,膜孔隙率和中心位置附近的平均孔径增加,上表面形成较厚的表皮层。在所有情况下,虽然在引入CO_2后立即发生相分离,但没有形成大孔。这与在以水为非溶剂的瞬时相分离条件下大孔的形成对比。测定了所得多孔膜的溶质截留系数和透水性等膜性能。
项目成果
期刊论文数量(10)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
H.Matsuyma: "Phase Separation Mechanism during Membrane Formation by Dry-cast Process"J.Applied Polymer Science. vol.77. 776-782 (2000)
H.Matsuyma:“干铸工艺膜形成过程中的相分离机制”J.Applied Polymer Science。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
H.Matsuyama: "Light Scattering Study of Kinetics of Pore Formation in TIPS Process;"Proc.the 5th International Symp.on Sep.Tech.-Korea and Japan,. 1. 731-734 (1999)
H.Matsuyama:“TIPS 过程中孔隙形成动力学的光散射研究”;Proc.the 5th International Symp.on Sep.Tech.-Korea and Japan,。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
H.Matsuyama: "Light Scattering Study of Kinetics of Pore Formation in TIPS Process ;"Proc.the 5th International Symp.on Sep.Tech.-Korea and Japan.. 1. 731-734 (1999)
H.Matsuyama:“TIPS 过程中孔隙形成动力学的光散射研究”;Proc.the 5th International Symp.on Sep.Tech.-Korea and Japan.. 1. 731-734 (1999)
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
H.Matsuyama: "Phase Separation Mechanism during Membrane Formation by Dry-cast Process"J.Applied Polymer Science. 77. 776-782 (2000)
H.Matsuyama:“干铸工艺膜形成过程中的相分离机制”J.Applied Polymer Science。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
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TERAMOTO Masaaki其他文献
TERAMOTO Masaaki的其他文献
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{{ truncateString('TERAMOTO Masaaki', 18)}}的其他基金
PROPOSAL OF NOVEL FACILITATED TRANSPORT MEMBRANE FOR GAS SEPARATION AND ITS APPLICATION FOR PROTECTION OF GLOBAL ENVIROMENT
新型气体分离促进传输膜的提案及其在保护全球环境中的应用
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$ 4.16万 - 项目类别:
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Formation of anistripic membrane by the hybrid process with thermally induced phase separation and nonsolvent induced phase separation
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