The present disclosure relates to a method for separating an organic zinc catalyst dispersed in a polyalkylene carbonate resin solution by filtering the polyalkylene carbonate resin solution using a composite filtering membrane, which is a composite material comprising a hydroxyl group-containing material and polyolefin material and has a form in which one or both surfaces of the polyolefin material is coated with the hydroxyl group-containing material.

The present disclosure is directed to methods and systems of purifying solvents. The purified solvents can be used for cleaning a semiconductor substrate in a multistep semiconductor manufacturing process.

The present disclosure is directed to methods and systems of purifying solvents. The purified solvents can be used for cleaning a semiconductor substrate in a multistep semiconductor manufacturing process.

The present disclosure is directed to methods and systems of purifying solvents. The purified solvents can be used for cleaning a semiconductor substrate in a multistep semiconductor manufacturing process.

A microporous membrane for filtering and a method for preparing the same, a flat filtering element and a gas filtering article are disclosed. The microporous membrane is composed of following raw materials in parts by weight: 100-110 parts of polyethylene, 27-30 parts of acrylonitrile, 0.1-0.2 parts of dicumyl peroxide, 2-4 parts of plasticizer, 1-2 parts of antimonous oxide, 0.8-1 part of zinc borate, 1-2 parts of antioxidant, 0.8-2 parts of heat stabilizer, 1-2 parts of octylisothiazolinone, 1-3 parts of calcium propionate, 0.7-2 parts of triglycidyl isocyanurate, 4-6 parts of diacetone alcohol, 0.7-1 part of oleic diethanolamide, 0.5-1 part of sodium myrastate and 1-2 parts of glycolic acid.

An electrochemical gas conversion device is provided, that includes a flexible membrane formed in a sack-shape, where the membrane includes a gas permeable and liquid-impermeable membrane, where at least a portion of the flexible membrane is surrounded by a liquid electrolyte held by a housing, where the flexible membrane includes a gas interior, an electrically conductive catalyst coating on an exterior surface of the flexible membrane, where the flexible membrane and the electrically conductive catalyst coating are configured as a anode or a cathode, and an inlet/outlet tube configured to flow the gas to the interior, from the interior, or to and from the interior of the flexible membrane.

An adsorption assembly and a battery are provided. The adsorption assembly includes: a housing including a gas permeable portion; and an adsorbent encapsulated by the housing. The adsorption assembly can effectively isolate the adsorbent from the external environment by providing the housing, thereby preventing the adsorption performance of the adsorbent from being affected, and the housing includes a gas permeable portion, which can make the produced gas in the external environment enter the housing and be effectively adsorbed by the adsorbent. In particular, when the adsorbent is used for a battery, especially a soft pack battery, the gas produced inside the battery can be effectively adsorbed to prevent liquid leakage of the battery seal caused by breakage of the battery seal by gas, improving reliability and safety of the battery and extending lifetime of the battery.

Embodiments disclosed herein generally relate to a microporous separator with a pore geometry that creates a low or no tortuosity architecture. In one embodiment, a battery cell may comprise of an anode layer, a cathode layer, and a separator layer positioned between the cathode layer and the anode layer. The separator layer may be comprised of one or more block copolymers. The block copolymers that make up the separator layer may be materials that self-align into a vertical nanostructure. The vertical nanostructures may allow ions within the battery cell to flow in a vertical path between the cathode and anode. This vertical path my create a low or no tortuosity environment within the battery cell.

A particulate plug for removing a preservative from a solution, suspension, or emulsion comprising a drug is presented. The plug comprises microparticles of a hydrophobic polymer/fatty acid blend. The microparticles of hydrophobic polymer/fatty acid blend selectively absorb preservative allowing the drug to remain in solution for delivery.

This application is directed to new and/or improved MD and/or TD stretched and optionally calendered membranes, separators, base films, microporous membranes, battery separators including said separator, base film or membrane, batteries including said separator, and/or methods for making and/or using such membranes, separators, base films, microporous membranes, battery separators and/or batteries. For example, new and/or improved methods for making microporous membranes, and battery separators including the same, that have a better balance of desirable properties than prior microporous membranes and battery separators. The methods disclosed herein comprise the following steps: 1.) obtaining a non-porous membrane precursor; 2.) forming a porous biaxially-stretched membrane precursor from the non-porous membrane precursor; 3.) performing at least one of (a) calendering, (b) an additional machine direction (MD) stretching, (c) an additional transverse direction (TD) stretching, and (d) a pore-filling on the porous biaxially stretched precursor to form the final microporous membrane. The microporous membranes or battery separators described herein may have the following desirable balance of properties, prior to application of any coating: a TD tensile strength greater than 200 or 250 kg/cm2, a puncture strength greater than 200, 250, 300, or 400 gf, and a JIS Gurley greater than 20 or 50 s.