32 results about "Barrer" patented technology

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 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 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 discloses a new type of polyimide membrane with high permeances and high selectivities for gas separations and particularly for CO2 / CH4 and H2 / CH4 separations. The polyimide membranes have CO2 permeability of 50 Barrers or higher and single-gas selectivity for CO2 / CH4 of 15 or higher at 50° C. under 791 kPa for CO2 / CH4 separation. The polyimide membranes have UV cross-linkable functional groups and can be used for the preparation of UV cross-linked polyimide membranes having CO2 permeability of 20 Barrers or higher and single-gas selectivity for CO2 / CH4 of 35 or higher at 50° C. under 791 kPa for CO2 / CH4 separation.

The present invention relates to a body protecting barrier mounted on the four sides of bed. Said body protecting barrier is composed of barrer frame, enclosure curtain and loocking mechanism.

The invention discloses a method for preparing a gas separation membrane with high MOF filler content, and belongs to the technical field of membrane separation. Disperse MOF particles in a solvent to prepare MOF "ink", and then mix the "ink" with the polymer solution in a water bath and ultrasonically make the two compatible. The film solution obtained after the solvent evaporated was poured on a glass plate and scraped to remove the solvent to obtain a film with a high MOF filler content. Finally, the obtained membrane is immersed in an appropriate amount of polymer solution, and the solvent is completely volatilized to obtain a high-MOF filler gas separation membrane with high gas separation performance. The membrane can avoid the problem of agglomeration caused by excessive filler content in traditional mixed matrix membranes, which leads to the degradation of separation performance. Its MOF filler content can reach up to 70%, and it shows the 2 / N 2 , CO 2 / CH 4 、H 2 / N 2 、H 2 / CO 2 With moderate selectivity for such gas pairs, the gas permeability coefficient can reach thousands of barrers, which is expected to meet the requirements of practical industrial applications.

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.

The present invention provides inventive hollow fibers having defined gas permability characteristics. Hollow fibers of the present invention are characterized by a PMPCO2 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 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.

A composite membrane of multi-layer ionic liquid and MOF is prepared by layer-by-layer deposition method, which belongs to a new type of composite membrane material. The multilayer composite film prepared by [TETA]L and MOF pair H 2 / CO 2 It has high separation performance. The preparation method we invented can prepare double-layer and triple-layer composite membranes of ionic liquid and MOF. Bilayer composite membrane pair H 2 / CO 2 The separation selectivity of the three-layer composite membrane is 53 for H 2 / CO 2 The separation selectivity of 67, H 2 Throughput up to 125461 barrer. The membrane material we prepared has ultra-high gas flux and effective separation performance, and achieves step-by-step separation through layer-by-layer accumulation to improve the H 2 / CO 2 The separation effect has an important reference significance for the preparation and application of membrane materials in the future.

The application discloses a mixed matrix membrane with a highly selective gas channel and a preparation method thereof, belonging to the technical field of membrane separation. The preparation process is to first coat polydimethylsiloxane and polyvinyl alcohol on the surface of polysulfone to prepare a hydrophilic modified polysulfone membrane, and then adopt low-temperature solid-phase synthesis method, using metal salt and ligand In-situ synthesis of metal composite hydrophobic filler particles on the surface of the obtained hydrophilic modified polysulfone membrane to obtain a hydrophobic HMP / MPSf membrane, and finally coating the hydrophilic polymer polyvinylamine on the surface of the hydrophobic HMP / MPSf membrane After interfacial self-assembly and drying, a mixed matrix membrane with highly selective gas channels was obtained, and its CO 2 The penetration rate is 1800‑3400GPU, CO 2 The permeability coefficient is 490‑995 Barrer, CO 2 / N 2 The selectivity is preferably 65-70, especially suitable for the separation of mixed gases containing carbon dioxide.

The invention discloses a carbon dioxide separation membrane and its application. The carbon dioxide separation membrane comprises a support layer, a nanoparticle composite layer and a polymer layer arranged in sequence; the carbon dioxide permeability of the carbon dioxide separation membrane is greater than 3400 Barrer, CO 2 / N 2 The selection factor is greater than 45. The carbon dioxide separation membrane prepared by the present invention has a three-layer structure, and the nanoparticle composite layer is formed by combining nanoparticles and the first polymer to solve the defect problem caused by uneven dispersion or agglomeration of nanoparticles in the mixed matrix membrane in the related art; At the same time, it also solves the problem of selectivity loss caused by the mismatch between the polymer component and the inorganic nanoparticle phase interface in the traditional mixed matrix membrane. The carbon dioxide separation membrane of the present invention has high selectivity to carbon dioxide and high permeability.

The invention discloses a VZIF-67 / ZIF-67-polyimide mixed matrix film, a preparation method and an application. The material of the matrix film is polyimide 6FDA-Durene, the filler is VZIF-67 or ZIF-67, and the filler is The mass fraction in the mixed matrix film is 10-30%, and the rest is polyimide 6FDA-Durene. VZIF-67 is uniformly dispersed in the matrix film solution by ultrasonic dispersion, and the solution casting method is used to prepare the described VZIF‑67 / polyimide mixed matrix membrane. The mixed matrix membrane pair separates CO 2 / CH 4 The mixed gas has remarkable separation performance (PCO 2 >1210 Barrer, αCO 2 / CH 4 >32.5), with higher CO compared to pure polyimide membrane 2 The gas permeability and separation selectivity can be applied to the purification of natural gas.

A class of glassy MOF membrane materials with hydrogen separation properties of the present invention is obtained by pressing the obtained MOFs powder material into tablets-melting-cooling or hot pressing on a substrate to prepare a glassy MOF with hydrogen separation properties The membrane material method is characterized in that: the steps are as follows: MOFs powder material preparation method: mix the materials in 2 or 3, add ethanol to grind, wash and dry the solid to obtain the target product, this kind of glassy MOFs membrane material It is synthesized by melting-cooling method for MOFs materials with glass transition behavior. This method is universal, easy to operate, low in raw material cost, large-scale processability, and different selectivities can be obtained by adjusting different metal salts The separation membrane material, the prepared glass MOF membrane H 2 / CO 2 The highest separation ratio can reach 92.7, and it has a hydrogen flux of 230.4 Barrer.

The invention discloses a polyimide gas separation membrane as well as a preparation method and applications thereof. The separation membrane is made of a polyimide resin which is shown in a formula I and has a fluorobenzene side group containing structure. The polyimide gas separation membrane has the characteristics of high permeability and high selectivity, the permeability coefficient to CO2 is greater than or equal to 180 barrer, the selective coefficient to CO2 / CH4 is greater than 30, and the separation membrane shows excellent heat resistance and mechanical properties. The gas separation membrane has an important application value in various CO2-related separation and recovery applications such as the separation of carbon dioxide and methane in biological gas, the removal of acid gases such as carbon dioxide and the like, the recovery of carbon dioxide in tertiary oil recovery of oil fields, and the like.

The invention relates to an amphoteric co-continuous polymer network. The amphoteric co-continuous polymer network is prepared through chemical crosslinking reaction by using an organic siloxane polymer as a raw material and N-isopropyl acrylamide as a reactant monomer to generate a graft copolymer. The gel dissolving rate in water is in the range of 0-10%, the swelling rate in water is in the range of 20-50%, and the oxygen transmissibility is in the range of 150-600 barrers. The invention also relates to a method for producing the amphoteric co-continuous polymer network. The method comprises the following steps: (1) synthesis of methacrylic acid-3-(1,1,3,3-tetramethyldisiloxane)propyl ester; (2) preparation of a modified unsaturated organic siloxane polymer mixture; (3) synthesis of the graft copolymer; and (4) preparation of amphoteric co-continuous network. The amphoteric co-continuous polymer network is used for biomedical materials, including contact lens, artificial organs, controlled-release drug carriers etc.

Described is a silicone hydrogel contact lens having non-uniform morphology. The contact lens may be made from a reactive mixture comprising: a silicone-containing component; a hydrophilic component;a non-reactive polymeric internal wetting agent; and a polymerization initiator, the contact lens having an oxygen permeability of at least about 60 barrers, and wherein the molar ratio in the lens ofthe polymeric non-reactive internal wetting agent to silicone, without a surface treatment, is greater in the lens's surface than in its bulk.