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公开(公告)号：US10960362B2
公开(公告)日：2021-03-30
申请号：US15520221
申请日：2015-11-02
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Quan Huang , Oliver Schuster , Phung Ngoc Duong , Wolfgang Ansorge
Abstract: Hydrophobic flat membrane made from a vinylidene fluoride polymer with a wall, a first surface, and a second surface. The membrane has on its first surface a network structure with open pores and on its second surface a continuous skin in which pores are formed, and adjacent to the skin of the second surface a supporting layer with an isotropic pore structure across the wall thickness, wherein the supporting layer extends over at least 80% of the wall thickness and wherein the pores of the supporting layer have an average diameter of less than 1 μm. The weight average of the molecular weight MW of the vinylidene fluoride polymer lies in the range from 300 000 to 500 000 daltons, and the polydispersivity MW/MN is greater than 5.5.
The pores in the skin of the second surface have a closed perimeter in the plane of the skin and an average ratio of the extension in the direction of the longest axis thereof to the extension in the direction of the shortest axis thereof of at most 5. The pores in the first surface and second surface have an essentially isotropic distribution of their orientation. The porosity of the membrane lies in the range from 50 to 90 vol. % and the wall thickness in the range from 50 to 300 μm. The membrane has a maximum separating pore diameter dmax in the range from 0.05 to 1.5 μm.-
Patent Agency Ranking
公开(公告)号：US20190091626A1
公开(公告)日：2019-03-28
申请号：US16094833
申请日：2017-04-20
Applicant: 3M INNOVATIVE PROPERTIES COMPANY , DMF MEDICAL INCORPORATED
Inventor： Ina Voigt , Wolfgang Ansorge , Florentin Wilfart , Michael Schmidt , Jan Haelssig
Abstract: Hydrophobic poly(4-methyl-1-pentene) hollow fiber membrane for retention of anesthetic agents with an inner and an outer surface and between inner and outer surface an essentially isotropic support layer with a sponge-like, open-pored, microporous structure free of macrovoids and adjacent to this support layer on the outer surface a dense separation layer with a thickness between 1.0 and 3.5 μm. The membrane has a porosity in the range of greater than 35% to less than 50% by volume and a permeance for CO2 of IN 20-60 mol/(h·m2·bar), a gas separation factor α(CO2/N2) of at least 5 and a selectivity CO2/anesthetic agents of at least 150. The process of for producing this membrane is based on a thermally induced phase separation process in which process a homogeneous solution of a poly(4-methyl-1-pentene) in a solvent system containing components A and B is formed, wherein component A is a strong solvent and component B a weak non-solvent for the polymer component. After formation of a hollow fiber the hollow fiber is cooled in a liquid cooling medium to form a hollow fiber membrane. The concentration of the polymer component in the solution may be in the range from 42.5 to 45.8 wt.-% and the hollow fiber leaving the die runs through a gap between die and cooling medium with a gap length in the range of 5-30 mm.
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公开(公告)号：US10926214B2
公开(公告)日：2021-02-23
申请号：US16094833
申请日：2017-04-20
Applicant: 3M INNOVATIVE PROPERTIES COMPANY , DMF MEDICAL INCORPORATED
Inventor： Ina Voigt , Wolfgang Ansorge , Florentin Wilfart , Michael Schmidt , Jan Haelssig
Abstract: Hydrophobic poly(4-methyl-1-pentene) hollow fiber membrane for retention of anesthetic agents with an inner and an outer surface and between inner and outer surface an essentially isotropic support layer with a sponge-like, open-pored, microporous structure free of macrovoids and adjacent to this support layer on the outer surface a dense separation layer with a thickness between 1.0 and 3.5 μm. The membrane has a porosity in the range of greater than 35% to less than 50% by volume and a permeance for CO2 of 20-60 mol/(h·m2·bar), a gas separation factor α(CO2/N2) of at least 5 and a selectivity CO2/anesthetic agents of at least 150. The process for producing this membrane is based on a thermally induced phase separation process in which process a homogeneous solution of a poly(4-methyl-1-pentene) in a solvent system containing components A and B is formed, wherein component A is a strong solvent and component B a weak non-solvent for the polymer component. After formation of a hollow fiber the hollow fiber is cooled in a liquid cooling medium to form a hollow fiber membrane. The concentration of the polymer component in the solution may be in the range from 42.5 to 45.8 wt.-% and the hollow fiber leaving the die runs through a gap between die and cooling medium with a gap length in the range of 5-30 mm.
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公开(公告)号：US20210170328A1
公开(公告)日：2021-06-10
申请号：US17154878
申请日：2021-01-21
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Ina Voigt , Wolfgang Ansorge , Florentin Wilfart , Michael Schmidt , Jan Haelssig
Abstract: Hydrophobic poly(4-methyl-1-pentene) hollow fiber membrane for retention of anesthetic agents with an inner and an outer surface and between inner and outer surface an essentially isotropic support layer with a sponge-like, open-pored, microporous structure free of macrovoids and adjacent to this support layer on the outer surface a dense separation layer with a thickness between 1.0 and 3.5 μm. The membrane has a porosity in the range of greater than 35% to less than 50% by volume and a permeance for CO2 of 20-60 mol/(h·m2·bar), a gas separation factor α(CO2/N2) of at least 5 and a selectivity CO2/anesthetic agents of at least 150.
The process for producing this membrane is based on a thermally induced phase separation process in which process a homogeneous solution of a poly(4-methyl-1-pentene) in a solvent system containing components A and B is formed, wherein component A is a strong solvent and component B a weak non-solvent for the polymer component. After formation of a hollow fiber the hollow fiber is cooled in a liquid cooling medium to form a hollow fiber membrane. The concentration of the polymer component in the solution may be in the range from 42.5 to 45.8 wt.-% and the hollow fiber leaving the die runs through a gap between die and cooling medium with a gap length in the range of 5-30 mm.-
公开(公告)号：US20210245110A1
公开(公告)日：2021-08-12
申请号：US17254139
申请日：2019-06-27
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Wolfgang Ansorge , Niklas M. Matzeit , Sven Frost , Ingmar Leismann
Abstract: The present disclosure is related to a polymeric membrane having a first surface and a second surface and a wall extending between the first and second surface, the membrane comprising pores on the first and second surfaces and throughout the wall, the membrane comprising a modified surface, the modified surface comprising acrylate and/or methacrylate polymers and/or copolymers, wherein the modified surface extends at least over the first and/or the second surface, and over the pores of at least 50% of the thickness of the wall. Furthermore, the present disclosure provides a method for producing such a membrane as well as a use of the membranes as disclosed herein for purification of aqueous media such as in biopharmaceutical applications.
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公开(公告)号：US20170312703A1
公开(公告)日：2017-11-02
申请号：US15520221
申请日：2015-11-02
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Quan Huang , Oliver Schuster , Phung Ngoc Duong , Wolfgang Ansorge
CPC classification number: B01D71/34 , B01D61/364 , B01D67/0011 , B01D67/0018 , B01D69/02 , B01D69/08 , B01D2323/08 , B01D2325/021 , B01D2325/026 , B01D2325/04 , B01D2325/24
Abstract: Hydrophobic flat membrane made from a vinylidene fluoride polymer with a wall, a first surface, and a second surface. The membrane has on its first surface a network structure with open pores and on its second surface a continuous skin in which pores are formed, and adjacent to the skin of the second surface a supporting layer with an isotropic pore structure across the wall thickness, wherein the supporting layer extends over at least 80% of the wall thickness and wherein the pores of the supporting layer have an average diameter of less than 1 μm. The weight average of the molecular weight MW of the vinylidene fluoride polymer lies in the range from 300 000 to 500 000 daltons, and the polydispersivity MW/MN is greater than 5.5.The pores in the skin of the second surface have a closed perimeter in the plane of the skin and an average ratio of the extension in the direction of the longest axis thereof to the extension in the direction of the shortest axis thereof of at most 5. The pores in the first surface and second surface have an essentially isotropic distribution of their orientation. The porosity of the membrane lies in the range from 50 to 90 vol. % and the wall thickness in the range from 50 to 300 μm. The membrane has a maximum separating pore diameter dmax in the range from 0.05 to 1.5 μm.
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