Abstract:
The present invention relates to a process for the manufacture of a porous polymer; wherein a composition comprising a polymerizable component, a porogen having an inverse temperature dependent solubility and a solvent are polymerized at a temperature around the cloud point temperature of the composition. The porous polymers obtainable according to the process of the invention are useful, for example, as materials for the manufacture of biomedical devices and prostheses, including ophthalmic devices such as contact lenses or artificial corneas.
Abstract:
Porous poly(aryl ether ketone) Membranes, Processes for Their Preparation and Use Thereof Porous poly(aryl ether ketone) (PAEK) articles are prepared from PAEK/polyimide blends by selective chemical decomposition and subsequent removal of the polyimide phase. Porous PAEK articles exhibit highly interconnected pore structure and a narrow pore size distribution. The porous PAEK articles of the present invention can be utilized as a porous media for a broad range of applications, including membranes for fluid separations, such as microfiltration, ultrafiltration, nanofiltration, and as a sorption media.
Abstract:
The preparation and use of novel porous poly(aryl ether) articles is disclosed. The porous articles are prepared from blends of poly(aryl ether) polymers with polyimides by selectively decomposing the polyimide phase. The preferred reagents used to decompose the polyimide phase include monoethanolamine and tetramethylammonium hydroxide. The porous articles can be configured as a single layer or as a multilayer article. The porous articles of the present invention are unique that at least one of the layers exhibits a narrow pore size distribution. The articles of the present invention can be used as a porous media for a broad range of applications, including porous membranes for fluid separations, such as microfiltration, ultrafiltration, and gas separation, as a battery separators, and as a sorption media.
Abstract:
The present invention discloses a method for preparing a hydrophilic porous polymeric material comprising the step of mixing a hydrophilic polymeric material with a hydrophobic material; solvent sintering the surface of the hydrophilic polymeric material with water or an aqueous solution; and removing the hydrophobic material contained within the hydrophilic polymeric material with a massive organic solvent. Thus, the hydrophilic porous polymeric material with high porosity and stable structure is rapidly mass produced.
Abstract:
A microporous polybenzimidazole membrane having a uniform pore structure and a narrow pore size distribution, and a process for making the membrane. The process requires coating a polybenzimidazole powder with a high temperature stable polymer and compression molding the coated particles at a temperature in the approximate range of 435.degree.-450.degree. C. to form a sheet or membrane. The polymer is then extracted from the sheet, leaving a fine, uniform, polybenzimidazole microporous structure.
Abstract:
Porous articles are provided that include a fibrous porous matrix and porous polymeric particles. The porous polymeric particles are distributed throughout the fibrous porous polymeric matrix. The porous article can be used to prepare a separation device or a system that includes the separation device. The porous articles can be used for the separation of a target material such as a microorganism (i.e., cellular analyte) from a sample.
Abstract:
A three-dimensionally ordered macroporous hydrogel for immobilizing a selected bioresponsive molecule and method of making are disclosed. The three-dimensionally ordered macroporous hydrogel comprises a crosslinked polymer that has a system of interconnected pores. The interconnected pores have a uniform pore size in the range of 50 to 5000 nm, and a plurality of first pore functional groups. The plurality of first pore functional groups is selected to immobilize a selected bioresponsive molecule. Examples of bioresponsive molecules include an enzyme; a molecule for: a protein scaffold, solid phase synthesis, nucleic acid synthesis, polypeptide synthesis, analyte detection, adsorption of analytes and measuring analyte concentrations, organic synthesis, and degradation of biologically active agents in wastewater. A method includes forming a colloidal crystal template, polymerizing a hydrogel within the pores of the colloidal crystal template, and selectively removing the colloidal crystal template. The hydrogel can be polymerized using CRP, ATRP and FRP polymerization processes.
Abstract:
Porous poly(aryl ether ketone) (PAEK) articles are prepared from PAEK/polyimide blends by selective chemical decomposition and subsequent removal of the polyimide phase. Porous PAEK articles exhibit highly interconnected pore structure and a narrow pore size distribution. The porous PAEK articles of the present invention can be utilized as a porous media for a broad range of applications, including membranes for fluid separations, such as microfiltration, ultrafiltration, nanofiltration, and as a sorption media.