14 results about "Surface initiated" patented technology

The invention discloses a medicinal glass bottle and a forming process thereof, and belongs to the technical field of medical materials, the medicinal glass bottle comprises a glass bottle body and a composite coating on the inner wall of the glass bottle; the forming process comprises the following steps: 1) pretreating the glass substrate; 2) constructing a composite layer; 3) constructing a barrier layer; and 4) cross-linking inerting and post-processing. According to the inner wall coating designed by the invention, a sandwich structure is adopted, and strong adhesive force of a bottom layer is realized through amino silane; the silver nanoparticles are anchored in situ by using a branched polyethyleneimine network, so that stable antibiosis is realized; a compact zwitterionic polymer brush is constructed on the outermost layer through surface-initiated polymerization, and a super-hydrophilic and biologically inert surface is provided; and finally, through cross-linking inerting treatment, the stability and safety of the coating are greatly improved. The problems of medicine adsorption, microorganism breeding, coating instability and the like of a traditional packaging material are solved, and a safe and reliable novel solution is provided for medicine packaging.

The present disclosure relates to a nanofiltration membrane and a method of manufacturing a nanofiltration membrane. The method includes providing a support structure having a first mesoporous layer made of TiO2 and / or ZrO2 and a second porous layer adjacent to the mesoporous layer made of aluminum oxide. The method further includes grafting an anchoring group within pores of the first mesoporous layer, wherein the second layer is inert to the grafting step. An initiator for a surface-initiated atom transfer radical polymerization (SI-ATRP) reaction is covalently bonded to the anchoring group. The support structure is impregnated with a monomer and a solvent, and a polymerization reaction is performed, which includes passing a catalyst through the mesoporous layer, the monomer being configured to start the polymerization reaction by grafting from the initiator in the presence of the catalyst.

The invention relates to a super-hydrophilic anti-fog coating based on an amphiphilic bottom layer and a preparation method of the super-hydrophilic anti-fog coating, and belongs to the technical field of polymer functional coatings. The invention aims to solve the problems of poor adhesive force, short antifogging time and insufficient durability of the existing antifogging coating. The surface of a base material is coated with an amphiphilic bottom layer composed of a hyperbranched polymer, then the base material with the bottom layer is soaked in a reductive metal ion solution, metal ions permeate into the bottom layer, then the base material is soaked in a deoxidized super-hydrophilic monomer solution, monomer polymerization is catalyzed in situ through the metal ions, and the super-hydrophilic polymer is obtained. A super-hydrophilic surface layer grows from the interior of the bottom layer. According to the method, through the composite structure of the bottom layer and the surface layer, the lasting anti-fog performance of the coating in a high-humidity environment is guaranteed, the overall adhesive force and the swelling resistance are improved, meanwhile, the coating is suitable for a base material in a complex shape through the thixotropic characteristic of the hyperbranched bottom layer and a surface initiation technology, and synergistic improvement of the anti-fog performance, the durability and the technology adaptability is achieved.

The invention relates to a polymer for treating a surface, which polymer comprises: n reactive intermediate precursor groups, wherein n is an integer equal to or greater than 3; and m groups which comprise an atom-transfer radical polymerization (ATRP) initiator, wherein m is an integer equal to or greater than 3, wherein the reactive intermediate precursor groups are selected from carbene precursor groups and nitrene precursor groups, wherein the carbene precursor groups are selected from hydrazone groups of formula (A), diazo groups of formula (B) and diazirine groups of formula (C), and the nitrene precursor groups are azide groups of formula (D), wherein R1 is H or -S(O)2R2, and R2 is an unsubstituted or substituted C1-6 alkyl group or an unsubstituted or substituted aryl group. The invention also relates to a process for producing a treated substrate, which treated substrate has a surface suitable for surface -initiated atom-transfer radical polymerization (SIATRP). The invention also relates to a treated substrate having a surface suitable for SIATRP, and to treated substrates obtainable by the aforementioned process of the invention. The invention also relates to a treated substrate which comprises: a substrate, a reacted polymer disposed on a surface of the substrate, and a further polymer, grown by SIATRP, bonded to the reacted polymer.

Methods for applying a polymeric coating to a substrate are provided comprising:(a) generating reactive functional groups on the polymeric substrate;(b) contacting the substrate with a radical polymerization initiator;(c) allowing the polymerization initiator to be chemically bonded to the substrate by reaction of the polymerization initiator with the reactive functional groups on the substrate;(d) contacting the polymerization initiator that is chemically bonded to the substrate with a monomer composition comprising a free-radical polymerizable monomer having at least one hydrophilic functional group;(e) forming a polymeric coating layer on the substrate via a radical polymerization process; and optionally(f) subjecting the polymeric coating layer on the substrate to conditions to effect curing of reactive functional groups on the polymers of the polymeric coating layer. The monomer composition may comprise at least 10 percent by weight of a (meth)acrylamide monomer having at least one ionic functional group.

The application discloses a kind of composite adsorption materials for water environment purification treatment and preparation method thereof, belong to water treatment functional material technical field.The composite adsorption material uses discarded cow hair as matrix, and the surface of matrix is formed by dopamine self-polymerization and co-deposition with metal composite powder to form polydopamine / metal composite powder coating, and polyallyl glycidyl ether is grafted on the coating by surface-initiated atom transfer radical polymerization, and finally, L-arginine or 2,4-diamino butyric acid is used for ring-opening modification.The metal composite powder is mixed by nano TiO2, nano ZrO2 and nano CeO2 in a specific ratio.The material is modified by zwitterion to give pH responsiveness, and can selectively adsorb anionic or cationic dyes under different pH conditions, and after adsorption saturation, the dyes can be eluted and recovered with dilute acid or dilute alkali, and photocatalytic regeneration can be realized by sunlight irradiation.

The invention provides adjustable electronic skin sensing ink as well as a preparation method and application thereof, and particularly relates to the technical field of flexible electronic functional materials. According to the preparation method, the active component of the electronic skin sensing ink is composite nanoparticles with a core-shell structure; wherein the core structure of the core-shell structure composite nanoparticle adopts a metal nanoparticle; a shell structure of the core-shell structure composite nanoparticle adopts a copolymer monomer; the preparation method specifically comprises the following steps: S1, synthesizing and pretreating a metal nano core; s2, preparing a copolymerized macromolecular monomer aqueous dispersion; s3, surface initiation and polymerization reaction; and S4, carrying out post-treatment on the reaction to obtain the electronic skin sensing ink. The method provided by the invention effectively solves the problem that the silver nanoparticles are easy to oxidize, and provides an electronic skin ink preparation technology which is adjustable in performance, high in stability and controllable in cost.

The invention discloses a low-odor environment-friendly functional textile fiber and a surface modification method thereof. The method comprises the following steps: by taking polyethylene glycol terephthalate fibers as a base material, sequentially carrying out washing and alkali treatment by using a nonionic surfactant, forming an intermediate layer by self-polymerization of dopamine, initiating group fixation, and initiating two-stage polymerization on the surface of a water phase to construct a gradient-distributed zwitterionic polymer brush layer; and carrying out poly (diallyldimethylammonium chloride) treatment and salt solution stabilization treatment to obtain the functional fiber with a stable surface structure. The modification method is completed under a water phase condition, the process is mild, release of peculiar smell substances in the fibers can be effectively reduced, and the fibers are endowed with good hydrophilicity, low adsorptivity and washing resistance. The obtained fiber shows a relatively low peculiar smell release level, a relatively stable surface state and good environmental adaptability under the conditions of use and repeated washing.

The invention belongs to the technical field of surface graft polymerization, and particularly relates to an aluminum-magnesium composite flame retardant and a preparation method thereof, the aluminum-magnesium composite flame retardant is a nano lamellar magnesium-aluminum layered double hydroxide grafted with a copolymer brush on the surface, and the copolymer brush is covalently grafted on the surface of the hydroxide through a surface-initiated atom transfer radical polymerization technology. According to the preparation method, the ultrathin LDH nanosheet is prepared through induction of the template agent, a high specific surface area and a basic physical barrier are provided, and the temperature-sensitive copolymer brush is grafted in situ; the grafted temperature-sensitive copolymer brush is hydrophilic and stretchable in an environment lower than LCST, the original mechanical property of a matrix is reserved to the maximum extent, when the temperature is high in fire and the environment temperature is higher than LCST, the copolymer brush efficiently triggers an expansion charring reaction cooperating with LDH, the flame-retardant function is achieved, and the problem that inherent high flame retardance and high mechanical property of a traditional flame retardant are contradictory is solved.

The present disclosure relates to a nanofiltration membrane and a method of manufacturing a nanofiltration membrane. The method includes providing a support structure having a first mesoporous layer made of TiO2 and / or ZrO2 and a second porous layer adjacent to the mesoporous layer made of aluminum oxide. The method further includes grafting an anchoring group within pores of the first mesoporous layer, wherein the second layer is inert to the grafting step. An initiator for a surface-initiated atom transfer radical polymerization (SI-ATRP) reaction is covalently bonded to the anchoring group. The support structure is impregnated with a monomer and a solvent, and a polymerization reaction is performed, which includes passing a catalyst through the mesoporous layer, the monomer being configured to start the polymerization reaction by grafting from the initiator in the presence of the catalyst.

The invention belongs to the technical field of antifouling coatings, and particularly relates to a modified polysilazane coating, a modified polysilazane coating, a preparation method of the modified polysilazane coating and a repairing method of the modified polysilazane coating. According to the modified polysilazane coating provided by the invention, the polysilazane compound and the low-surface-energy compound are combined to construct a firm anti-attrition coating, the polymer brush monomer is grafted with the polymer brush on the surface of the anti-attrition coating to enhance the surface hydration lubrication and antifouling performance of the anti-attrition coating, and the rigid polysilazane is grafted with the low-surface-energy fluorine to endow the surface with low viscous resistance. The preparation method comprises the following steps: firstly, constructing a tough bottom layer taking polysilazane as a main body, and introducing active sites which can be subjected to multiple times of controllable surface-initiated polymerization on the surface of the tough bottom layer; the initially grafted polymer brush layer provides a first efficient anti-fouling defense line. And when the function of the polymer brush is degraded under long-term friction and abrasion in a marine environment, active sites reserved in the substrate are activated again, so that secondary grafting and even multiple grafting of the polymer brush can be realized, and the original antifouling property of the surface of the coating can be recovered.

The application discloses a medicinal glass bottle and a forming process thereof, and belongs to the technical field of medical materials, and comprises a glass bottle body and a composite coating of the inner wall of the glass bottle; the forming process comprises the following steps: 1) glass substrate pretreatment; 2) composite layer construction; 3) barrier layer construction; 4) cross-linking and inactivation and post-treatment. The inner wall coating designed in the application adopts a sandwich structure, realizes strong adhesion of a bottom layer through amino silane, realizes stable antibiosis by in-situ anchoring of silver nanoparticles through a branched polyethylene imine network, constructs a dense zwitterionic polymer brush on the outermost layer through surface-initiated polymerization, provides a super-hydrophilic and bio-inert surface, and finally, through cross-linking and inactivation treatment, the stability and safety of the coating are greatly improved. The application solves the problems of drug adsorption, microbial breeding and unstable coating existing in traditional packaging materials, and provides a safe and reliable new solution for medicine packaging.

The present application relates to the technical field of oil and gas exploitation, and particularly relates to a dense rock sub-micro emulsion type interface modifier, a preparation method and application thereof. In the composition: a surfactant and a co-surfactant construct a composite interface film to stabilize sub-micro droplets, water is used as a carrier to deliver a hydrophobic monomer and a hydrophobic enhancer to the surface of the dense rock, and the initiator initiates a polymerization reaction, so that the hydrophobic monomer forms a polymer skeleton, the hydrophobic enhancer is embedded in the skeleton and chemically bonded with the rock surface, and finally a modified layer with strong hydrophobicity and firm adhesion is formed. By using the preparation method provided by the present application, the obtained dense rock sub-micro emulsion type surface modifier has at least 93% of the particle size distributed in the range of 251-423 nm, which is matched with the characteristics of the dense rock with low porosity and low permeability and mainly nanometer-micron level pores. In addition, the preparation method provided by the present application is simple in operation and controllable in conditions, and is conducive to realizing large-scale production.

The application discloses a kind of composite adsorption materials for water environment purification treatment and preparation method thereof, belong to water treatment functional material technical field.The composite adsorption material uses discarded cow hair as matrix, and the surface of matrix is formed by dopamine self-polymerization and co-deposition with metal composite powder to form polydopamine / metal composite powder coating, and polyallyl glycidyl ether is grafted on the coating by surface-initiated atom transfer radical polymerization, and finally, L-arginine or 2,4-diamino butyric acid is used for ring-opening modification.The metal composite powder is mixed by nano TiO2, nano ZrO2 and nano CeO2 in a specific ratio.The material is modified by zwitterion to give pH responsiveness, and can selectively adsorb anionic or cationic dyes under different pH conditions, and after adsorption saturation, the dyes can be eluted and recovered with dilute acid or dilute alkali, and photocatalytic regeneration can be realized by sunlight irradiation.