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AssigneeNational Institute for Materials
InventorsIzumi Ichinose, XinSheng Peng
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The object of the invention is to provide an organic polymers-separation membrane filter capable of physically separating organic polymers based on their molecular stereostructure difference without giving rise to chemical changes in them and without selecting their chemical compositions. The organic polymers-separation membrane filter comprising an ultrafilter membrane is characterized in that a path taken by a nano permeation pore has a narrower path portion having a width narrower than that of the rest, wherein organic polymers capable of changing in their stereostructure are passed through the path while their width is transformed into a configuration along the narrower path portion, thereby separating the organic polymers. In the ultrafilter membrane, particulate materials are mutually coupled together in its thickness and planar directions. The particulate materials comprise a protein. The particulate materials comprise protein particles deposited onto a nanostrand such that they are mutually crosslinked and integrated together. The nano permeation pore includes a mark remaining where the nanostrand is removed. The invention also provides a method for separating organic polymers capable of changing in their stereostructure, using the organic polymers-separation membrane filter.
An organic polymers-separation membrane filter which comprises an ultrafilter membrane, characterized in that a path taken by a nano permeation pore in the ultrafilter membrane has a narrower portion having a width narrower than that of the rest, and organic polymers capable of changing in their stereostructure pass through the path taken by the nano permeation pore while widths of the organic polymers are transformed into a configuration along the narrower portion, thereby separating the organic polymers.
An organic polymers-separation method, characterized in that using an organic polymers-separation membrane filter comprising an ultrafilter membrane in which a path taken by a nano permeation pore has a narrower portion having a width narrower than that of the rest, organic polymers capable of changing in their stereostructure pass through the path taken by the nano permeation pore while widths of the organic polymers are transformed into a configuration along the narrower portion, thereby separating the organic polymers.
An organic polymers-separation method in which, with a pressure difference of 20 kPa or more set between one surface side and another surface side of a filter, a solution having organic polymers dispersed therein passes through the filter, characterized in that using an organic polymers-separation membrane filter comprising an ultrafilter membrane in which a path taken by a nano permeation pore has a narrower portion having a width narrower than that of the rest, and dispersing in the solution an organic compound capable of being included in the organic polymers.
Dependencies are inferred from the claim text.