摘要:
Viral filtration media, an article comprising the viral filtration media, and a method of filtering a virus-containing sample using the viral filtration media, wherein the viral filtration media comprises: a porous substrate comprising a surface having a polymer grafted thereto, wherein the grafted polymer comprises interpolymerized monomers comprising: a (meth)acrylic acid monomer: and, optionally, a poly (alkylene oxide) monomer.
摘要:
The present invention belongs to the technical field of membranes, and in particular relates to a polyamide composite reverse osmosis membrane and to a preparation method thereof. The polyamide composite reverse osmosis membrane provided by the present invention comprises: a nascent membrane and a temperature-responsive polypeptide grafted to a surface of the nascent membrane; the nascent membrane comprises a support layer and a polyamide separation layer joined to the support layer; the temperature-responsive polypeptide is a homopolymeric (L-glutamate) containing oligo(ethylene glycol). The polyamide composite reverse osmosis membrane provided in the present invention has excellent pollution resistance and oxidation resistance capabilities, has a low difficulty of cleaning, and has extremely broad market prospects.
摘要:
The disclosure provides a porous polymeric membrane having ionizable nitrogen functional groups at least at its surface, wherein such groups are associated with a hydroxide anion. The membranes are useful in the purification of polar solvents such as water and alcohols and are capable of removing trace amounts of anionic contaminants such as halides, phosphates, nitrates, nitrites, sulfites, and sulfates.
摘要:
Disclosed are fouling resistant filtration membranes comprising a polymeric thin-film membrane comprising a surface. Also disclosed are methods of modifying thin-film filtration membranes, thereby improving, for example, the anti-fouling properties of the membranes. Also disclosed are methods of purifying water using the disclosed membranes. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.
摘要:
A porous asymmetric membrane comprises a hydrophobic polymer comprising a poly(phenylene ether) or poly(phenylene ether) copolymer; and a polymer additive. A separation module can be fabricated from the porous asymmetric membrane. A method of forming the porous asymmetric membrane comprises: dissolving a hydrophobic polymer comprising a poly(phenylene ether) or poly(phenylene ether) copolymer and, a polymer additive in a water-miscible polar aprotic solvent to form a porous asymmetric membrane-forming composition; and phase-inverting the porous asymmetric membrane forming-composition in a first non-solvent composition to form the porous asymmetric membrane. The polymer additive comprises hydrophilic functional groups, copolymerized hydrophilic monomers, or blocks of hydrophilic monomer repeat units. For example, the polymer additive can comprise a hydrophilic polymer or amphiphilic polymer. The porous asymmetric membrane can be a flat membrane or hollow fiber.
摘要:
The invention provides a medical intravenous support apparatus that facilitates patient mobility while reducing the likelihood of an accidental fall. The design incorporates improved features for bag support, tube management, cord management, patient steadiness, user-friendly braking, and electric power supply.
摘要:
A method is disclosed for purifying an antibody monomer, comprising providing a porous membrane comprising a hydrophobic porous substrate, a hydrophilic molecular chain of a different material from that of the porous substrate, immobilized on the surface of pores of the porous substrate, and a side chain of the molecular chain, containing a nitrogen atom to which one to three alkyl groups each having two or three carbon atoms are bonded; passing an antibody solution containing antibody aggregates of dimers or higher-order multimers through the porous membrane to adsorb the antibody aggregates to the porous membrane; and recovering the purified antibody monomer in the passed solution.
摘要:
Provided are methods of separating one or more components from a fluid by using membranes and other materials comprising polymer graft nanoparticles arranged in a lattice structure. The disclosed compositions exhibit an increase in selectivity between two penetrants that is greater than the neat polymer selectivity for those penetrants. The compositions also exhibit an increase in selectivity between two penetrants with increasing permeability. Also provided are systems for effecting such separations, systems for agent detection, and additional methods for constructing separation components.
摘要:
Disclosed are fouling resistant filtration membranes comprising a polymeric thin-film membrane comprising a surface. Also disclosed are methods of modifying thin-film filtration membranes, thereby improving, for example, the anti-fouling properties of the membranes. Also disclosed are methods of purifying water using the disclosed membranes. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.
摘要:
Provided are (1) a vinyl alcohol graft copolymer grafting polymerizable unsaturated monomers as a graft chain onto a side-chain mercapto group-containing vinyl alcohol polymer backbone, the graft chain being attached to the polymer backbone at a mercapto group, and the backbone including: a vinyl alcohol unit and a unit represented by the following formula (I): wherein R1 is a hydrogen atom or a carboxyl group; R2 is a hydrogen atom, a methyl group, a carboxyl group, or a carboxymethyl group; and X is a divalent C1-22 group which contains a carbon atom and a hydrogen atom and may contain a nitrogen atom and/or an oxygen atom; and (2) an ion-exchange membrane having controlled swelling in water and excellent flex resistance, the membrane including a vinyl alcohol graft copolymer as described above.