31 results about "Barrer" patented technology

The present invention relates to a composition comprising a hydrogel polymer having less than 100% haze, and distributed therein an oxygen enhancing effective amount of oxygen permeable particles having an oxygen permeability of at least about 100 barrer, average particle size less than about 5000 nm.

The present invention relates to soft contact lenses having an overall comfort preference of at least about 2 to 1 as compared to an Acuvue® contact lens and measured after one week of daily wear. The present invention further relates to a soft contact lens comprising an oxygen transmissibility greater than about 70 barrers/mm and physical properties suitable to provide wearer comfort over at least about 9 hours in at least about 80% of wearers, as measured in a randomized, double masked clinical study.

The invention discloses a polyimide-zinc organic framework loaded graphene oxide hybrid membrane. A preparation process comprises the following steps: preparing graphene oxide by adopting a Hummer method, preparing dispersing liquid with a mass ratio of methanol to water of (1 to 4) to 1, and performing ultrasonic dispersion; adding the graphene oxide and the dispersing liquid into a mixed solution of zinc nitrate hexahydrate and 2-methylimidazole, and performing a stirring reaction at room temperature, thus preparing a zinc organic framework loaded graphene oxide compound nanosheet; and blending the zinc organic framework loaded graphene oxide compound nanosheet and a polyimide solution to prepare a membrane casting solution, and preparing the hybrid membrane through a tape casting method. The polyimide-zinc organic framework loaded graphene oxide hybrid membrane disclosed by the invention has the advantages that the raw materials of the hybrid membrane are easy to obtain, and the preparation process is simple and controllable; and the prepared compound membrane is used for gas separation, and has excellent separation performance. Particularly, under a humidification condition, the permeability of CO2 pure gas is 238 barrer, and the CO2/N2 selectivity is 65.

The invention discloses an amphiphilic copolymer network, which is composed of a star amphiphilic copolymer and a hydrosilation crosslinking agent by crosslinking, wherein the star amphiphilic copolymer is prepared by carrying out chemical reaction on a star amphiphilic homopolymer and a suspension alkynyl containing hydrophobic segmented copolymer; and the swelling degree of the amphiphilic copolymer network in n-hexane is 20-150%, the swelling degree of the amphiphilic copolymer network in water is 50-800%, the swelling degree of the amphiphilic copolymer network in ethanol is 400-1000%, and the oxygen transmittance is 500-1600 Barrers. The amphiphilic copolymer network can be used as a medical polymer material. The invention also discloses a preparation method of the amphiphilic copolymer network.

The present invention provides inventive hollow fibers having defined gas permability characteristics. Hollow fibers of the present invention are characterized by a PMP_CO2 greater than 30,000 Barrer*MPa. Curable compositions and silicone elastomers produced by curing the curable compositions are provided by the present invention. Compositions and methods for making the hollow fibers and devices incorporating them are provided by the present invention.

The disclosed preparation method with hydrothermal and Barrer non-equilibrium synthesis techniques is for improved 13X molecular sieve. Wherein, the said sieve is metastable phase; when using sodium silicate and sodium aluminate as silicon source and aluminium source separately, the silicate radical has different polymerization states, the aluminate radical and aluminosilicate radical have different structures and states; in alkaline condition, the silicate and aluminate polymerize and form crystallized glue and obtain the said sieve; wherein, the mole ratio of indredients is: Na2O/Al2O3: 3.0-4.0, SiO2/Al2O3: 2.5-3.2, H2O/Al2O3: 30-40.

A gas permeable glass window, suitable for use with liquid interface additive manufacturing, has an optically transparent glass article greater than about 0.5 millimeters in thickness defining a firstsurface and a second surface. A plurality of gas channels are disposed through the article from the first surface to the second surface. The gas channels occupy less than about 1.0% of a surface areaof the article and are configured such that the article has a gas permeability between about 10 barrers and about 2000 barrers.

The invention discloses a gas separation membrane, and a preparation method and application thereof. The gas separation membrane comprising 60-100 mol% of monomeric units derived from alpha,beta,beta-trifluorostyrene, has an intrinsic viscosity of 0.5-5.0 dL/g, a tensile strength of at least 50 MPa, and a hydrogen permeability coefficient of at least 100 barrer according to a test result of the GB/T 1038-2000 test method.