Abstract:
A method of making a nanoporous structure comprising a matrix and at least one nanosized pore within the matrix, wherein the method comprises contacting at least a portion of a templated matrix with an acid solution, wherein the templated matrix comprises a matrix that selected from the group consisting of an organic polymer, a sol-based ceramic, an inorganic salt, an organoaluminate, and combinations thereof, and one or more nanosized templates within the matrix, wherein each nanosized template comprises a core that comprises an inorganic oxide, to dissolve at least a portion of the inorganic oxide of at least one of the cores and form the at least one nanosized pore within the matrix thereby forming the nanoporous structure.
Abstract:
A porous polyimide resin film having a high aperture ratio, and a method for producing a porous polyimide film. The method includes removing fine particles from a polyimide resin-fine particle composite film to obtain a porous polyimide resin film by either removing at least a part of a polyimide resin portion of the polyimide resin-fine particle composite film prior to removing the fine particles, or by removing at least a part of the porous polyimide resin film subsequent to removing the fine particles.
Abstract:
Pellets or granules comprise polymeric material, for example polyetheretherketone and a fugitive material, for example sodium chloride. The granules may be used in injection moulding to produce shapes for use in medical implants and may conveniently be used to form parts which are partially porous, or to prepare porous films.
Abstract:
A process for producing a porous film containing a liquid crystal polyester comprising the following steps (a), (b) and (c) in this order: (a) dispersing 1 to 1,500 parts by weight of a filler, based on 100 parts by weight of a liquid crystal polyester, in a solution in which 100 parts by weight of the liquid crystal polyester is dissolved in a solvent to produce a slurry coating liquid; (b) coating the coating liquid on at least one side of a substrate to form a coating film; and (c) removing the solvent from the coating film, immersing the film in a solvent which does not dissolve the liquid crystal polyester, and drying the film to form a porous film containing a liquid crystal polyester.
Abstract:
The invention provides a particulate material comprising porous polymeric microparticles having a mesoporous structure. A process for making the particles is also presented. The process comprises impregnating a porous microparticulate template material with a liquid comprising one or more monomers. The one or more monomers are then polymerised in and/or on the template material to form a polymer, and the template material is then removed to produce the particulate material.
Abstract:
A porous, molecularly imprinted polymer and a process for its preparation are described. The porous, molecularly imprinted polymer is characterised in that it is obtainable by providing a porous silica; attaching a molecular template to the surface of the porous silica; filling the pores of the porous silica with a polymer; removing the silica and the molecular template, thereby leaving a porous, molecularly imprinted polymer. The process is characterised by the above defined process steps. Also described are a porous polymer vesicle and its preparation with the same features as defined for the porous, molecularly imprinted polymer and its preparation, except for the lack of the molecular template and thus the lack of the molecular imprint in the porous polymer.
Abstract:
A method of making a silicone rubber having a structure adapted for growth of cells or living tissue, which comprises contacting a silicone rubber precursor with a biologically-acceptable sacrificial filler, curing the resultant mixture and removing the sacrificial filler to form a structured silicone rubber. The sacrificial filler is preferably an inorganic salt that has been ground, and the salt is selected from metal halides, metal carbonates and metal bicarbonates.
Abstract:
The invention relates to a porous membrane made of a particular fluorine resin, having excellent chemical resistance, excellent thermal resistance, excellent filtration performance and excellent mechanical properties, and having uniform porous structure comprising minute pores, and also relates to a process for preparing the same. In particular, the invention relates to a porous membrane suited for a microfilter having excellent thermal resistance and excellent filtration performance, especially a porous membrane suited for a microfilter for use in purification of chemicals such as strong acid and strong alkali by utilizing the excellent chemical resistance, and also a process for preparing the same.
Abstract:
The invention relates to a porous membrane made of a particular fluorine resin, having excellent chemical resistance, excellent thermal resistance, excellent filtration performance and excellent mechanical properties, and having uniform porous structure comprising minute pores, and also relates to a process for preparing the same. In particular, the invention relates to a porous membrane suited for a microfilter having excellent thermal resistance and excellent filtration performance, especially a porous membrane suited for a microfilter for use in purification of chemicals such as strong acid and strong alkali by utilizing the excellent chemical resistance, and also a process for preparing the same.