Solvent-free production of porous polymer structures
AssigneeNovamem AG
InventorsChristoph Ruedi Kellenberger, Michael Loepfe
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Abstract
A method for manufacturing of porous polymer structures, in particular membranes, the method comprising the steps of providing a mixture of one or more polymers and one or more salt nano- and/or microparticles, primary shaping said blend, and removing said one or more salt particles, wherein at least part of the one or more salt nano- and/or microparticles is one or more solid acids, and whereby the ratio of polymer-to-particle is in the range of 3:1 to 1:10 by weight. Also provided are mixtures suitable to obtain such porous polymer structures, porous polymer structures as described herein, shaped articles containing such structures, and the use of such porous polymer structures, shaped articles and mixtures.
Claims16
A method of manufacturing a porous polymer structure having a pore size of 1 to 5000 nm, comprising the steps of:
- a) providing a powder mixture comprising:
- 1 to 90 wt. % of at least one of one or more polymers and oligomeric precursors thereof,
- 0.5 to 95 wt. % of at least one of salt nanoparticles and salt microparticles having primary particle sizes between 1 and 50,000 nm,
- wherein at least part of one or both of said at least one of salt nanoparticles and salt microparticles is one or more solid acids,
- and
- wherein the ratio of polymer to particles is in the range of 3:1 to 1:10 by weight;
- d) primary shaping said mixture to obtain a material;
- and
- i) removing said at least one of salt nanoparticles and salt microparticles with a non-organic solvent to obtain a porous polymer structure.
A method of manufacturing a porous polymer structure having a pore size of 1 to 5000 nm, comprising the steps of:
- a) providing a powder mixture comprising:
- 1 to 90 wt. % of at least one of one or more polymers and oligomeric precursors thereof,
- 0.5 to 95 wt. % of at least one of salt nanoparticles and salt microparticles having primary particle sizes between 1 and 50,000 nm,
- wherein at least part of one or both of said at least one of salt nanoparticles and salt microparticles is one or more solid acids,
- and
- wherein the ratio of polymer to particles is in the range of 3:1 to 1:10 by weight;
- d) primary shaping said mixture to obtain a material, wherein the primary shaping is performed by extruding said mixture through a die to form porous polymer structures with a constant cross-section or the primary shaping is performed by casting said mixture to form parts with a non-uniform cross-section;
- and
- i) removing said at least one of salt nanoparticles and salt microparticles with a non-organic solvent to obtain a porous polymer structure.
A method of manufacturing a porous polymer structure having a pore size of 1 to 5000 nm, comprising the steps of:
- a) providing a powder mixture comprising:
- 1 to 90 wt. % of at least one of one or more polymers and oligomeric precursors thereof,
- 0.5 to 95 wt. % of at least one of salt nanoparticles and salt microparticles having primary particle sizes between 1 and 50,000 nm,
- wherein 40 to 85 wt. % of said at least one of salt nanoparticles and salt microparticles is one or more solid acids,
- and
- wherein the ratio of polymer to particles is in the range of 3:1 to 1:10 by weight;
- d) primary shaping said mixture to obtain a material;
- and
- i) removing said at least one of salt nanoparticles and salt microparticles with a non-organic solvent to obtain a porous polymer structure.
Dependencies are inferred from the claim text.