Method for preparing polyvinylidene fluoride flat plate porous film by thermal phase separation process
Title：
Method for preparing polyvinylidene fluoride flat plate porous film by thermal phase separation process
Application Number：
 200510086337
Application Date：
 2005/09/02
Announcement Date：
 2006/03/22
Pub. Date：
Publication Number：
 1748844
Announcement Number：
Grant Date：
Granted Pub. Date：
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 B01D 71/34, B01D 69/06
Applicant(s)：
 Tsinghua Univ.
Inventor(s)：
 Chen Cuixian, Su Yi
Key Words：
 thermal phase separation process, polyvinylidene fluoride, flat plate porous film, preparing method
Abstract：
 The thermal phase separation process for preparing plate porous polyvinylidene fluoride film includes the following steps: mixing and heating polyvinylidene fluoride in 25-35 wt% and diluent in 65-75 wt% through stirring in high temperature reactor to obtain homogeneous polymer solution, debubbling and letting stand to obtain film casting liquid; preheating mold; pouring the film casting liquid into the mold and rolling to form; setting in cooling environment to cool and to crystallize polymer into film; setting the film inside extractant to eliminate diluent and obtain the plate porous polyvinylidene fluoride film. Prepared plate porous polyvinylidene fluoride film via the said process has narrow pore size distribution, various structure and powerful adaptability, and the preparation process is simple.
Claim：
Priority：
PCT：
LegalStatus：

Recommend this patent:
1 2 3 4 5
Average ( 0 votes):
                                                                          Recommended Patents>>

Relevancy information



Other Patents of Same Inventor

Bump interconnected decoding equalizer
Polyelectrolyte membrane for osmotic vaporization and method for making said membrane
Polyelectrolyte membrane for osmotic vaporization and method for making said membrane
Process for preparing compound polyelectrolyte (chitosan/sodium polyphosphate) membrane
Polyelectrolyte membrane for osmotic vaporization and process for preparing compound polyelectrolyte membrane
Low-temperature plasma grafting infiltration vaporization membrane and its preparing method
Method for hydrophilic modification of ultrahigh molecular weight polyethylene microporous membrane surface
Dinitrogen phenodiazine polyethersulfone ketone hollow fiber ultra filtration membrane and fabrication method thereof
Method for breeding transgenic zebra fish and its special plasmid
Method for breeding transgenic zebra fish and its special plasmid
Ultrafiltration membrane of hollow fiber made form polyarylether sulfone or polyarylether ketone of containing phenolphthalein lateral group, and preparation method
Permeation gasification gasoline desulfur blend composite film and its preparation method
Separation film for separating methanol/methyl-carbonate azotrope
Polyimide asymmetric membrane for desulfurization of gasoline, and preparation method
Organic steam-separated blend composite film and its production



News & Events More>>

Last Update  
2008-4-17
  Selected patents owned by Tsinghua University filed in 2005 are loaded.
2008-3-31
  Selected patents owned by Tsinghua University filed in 2006 and 2007 are load.







Copyright 2008-2015 All Rights Reserved Patent License of China.      Designed by Easygo