32 results about "Surface initiated" patented technology

The invention discloses a medical catheter surface strong interface bonding hydrogel coating method based on subsurface initiated polymerization. The method comprises the steps that firstly, a mixed solvent of an organic solvent and water is adopted for conducting swelling pretreatment on the surface of a catheter base material, so that polymer chains on the surface layer of the base material are relaxed; a solution containing initiator molecules is injected into the inner cavity of the catheter, so that the initiator is diffused and anchored in the subsurface area of the base material; preparing a hydrogel monomer solution containing a hydrophilic monomer, a cross-linking agent and a catalyst, and pouring the hydrogel monomer solution into the inner cavity of the catheter; and finally, sealing the two ends of the conduit, and initiating polymerization reaction under a specific temperature condition, so that the initiator anchored on the subsurface is decomposed to generate free radicals. The hydrogel coating and the catheter base material form a double combination effect of physical interlocking and chemical bonding through a subsurface initiated polymerization mechanism, the firmness and stability of the coating are remarkably improved, and the method is particularly suitable for modification of the inner surfaces of various medical catheters with complex structures.

The invention discloses a corona-resistant polyimide film based on a core-shell structure nano SiO2 (at) PS filler and a preparation method of the corona-resistant polyimide film, and belongs to the technical field of high polymer materials. The preparation method comprises the following steps: dissolving diamine in a solvent under the protection of an inert atmosphere to obtain a diamine solution; preparing a nano SiO2 (at) PS filler dispersion liquid with a core-shell structure; adding the nano SiO2 (at) PS filler dispersion liquid into a diamine solution, fully stirring, and adding dianhydride to obtain polyamide acid resin; and carrying out vacuum negative pressure defoaming on the polyamide acid resin, and then carrying out curtain coating, stretching and imidization to obtain the corona-resistant polyimide film. The preparation method comprises the following steps: carrying out surface amination on a nano SiO2 filler, fixing an ATRP (Atom Transfer Radical Polymerization) initiator, and carrying out surface initiation on ATRP grafted polystyrene to obtain a nano SiO2 (at) PS filler with a core-shell structure; the nanofiller SiO2 (at) PS can effectively avoid the agglomeration phenomenon and is easier to disperse, meanwhile, the nanofiller SiO2 (at) PS has better compatibility in a polyamide acid solution system, and the prepared corona-resistant polyimide film has more uniform corona resistance, insulation and mechanical properties.

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 invention discloses a molecularly imprinted electrochemical sensor and a preparation method and application thereof. A magnetic molecularly imprinted polymer is obtained by ATRP polymerization using a magnetic MOFs material as a carrier; the magnetic molecularly imprinted polymer is modified onto an electrode surface to obtain the molecularly imprinted electrochemical sensor. In the present invention, a silicon dioxide layer is coated on the surface of a magnetic core to effectively prevent the magnetic core from being oxidized or corroded. Hydroxyl groups are introduced by coating polydopamine on the surface of the magnetic core, which facilitates complexation with metal ions during the synthesis of the MOFs material. The introduction of the MOFs material enriches the recognition sites. An initiator for ATRP polymerization is introduced on the surface of magnetic nanoparticles coated with the MOFs material to prepare a molecularly imprinted polymer layer by surface-initiated atom transfer radical polymerization. The sensor has the characteristics of low separation and recovery difficulty, high recognition efficiency and short detection cycle, avoids the risk of template molecule leakage during use, and has high safety and reliability.

The invention relates to the technical field of blood purification, and particularly discloses resin for adsorbing cell factors and a preparation method of the resin. The invention relates to a resin for adsorbing cytokines, which is a composite microsphere with a core-shell structure, a core layer is a porous polystyrene-divinyl phenyl body, and a phenylboronic acid functional group is covalently bonded on the core layer; the shell layer is a zwitterionic polymer brush grafted outside the core layer through surface-initiated atom transfer radical polymerization; the preparation method comprises the following steps: synthesizing porous polystyrene-divinyl benzene microspheres, and fixing chloromethyl on the skeleton of the microspheres to obtain a macromolecular initiator; reacting the macromolecular initiator with a compound containing phenylboronic acid groups, and covalently immobilizing the phenylboronic acid groups on the microsphere matrix; the microsphere matrix and the zwitterionic monomer are subjected to surface-initiated atom transfer radical polymerization reaction, and the zwitterionic polymer brush is formed on the surface of the microsphere. The resin provided by the invention has the advantages of high selectivity, high adsorption capacity and excellent blood compatibility.

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 biomedicine, and particularly relates to a preparation method of a potassium K < + > recognition response quartz crystal microbalance chip and a blood potassium concentration quantitative detection method. A 3-aminopropyltriethoxysilane (APTES) solution is used for carrying out functionalization treatment on the surface of a silicon dioxide sheet, so that a large number of amino functional groups are obtained on the surface of the silicon dioxide sheet. The preparation method comprises the following steps: taking 4-acrylamide benzene-15-crown-5 as a template, then anchoring an ATRP (Atom Transfer Radical Polymerization) initiator-bromoisobutyryl bromide on the surface of the template through a covalent bond, and carrying out grafting construction of a benzene-15-crown-5 functional polymer brush by adopting Cu0-mediated surface-initiated atom transfer radical polymerization (Cu0-SI-ATRP) by taking 4-acrylamide benzene-15-crown-5 as a polymeric monomer. The potassium selective quartz crystal microbalance based on the crown ether functionalized polymer brush is obtained.

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.

The invention belongs to the technical field of liquid crystal elastomer fibers, and particularly relates to a subsurface modified enhanced conductive liquid crystal elastomer fiber and a preparation method and application thereof. The preparation method comprises the following steps: preparing a liquid crystal elastomer (LCE) fiber containing an atom transfer radical polymerization initiator; initiating atom transfer radical polymerization on the subsurface to graft a polymer brush; ion exchange treatment; carrying out metal electroless deposition to obtain the wrinkled metal coating LCE fiber; and coating the surface of the metal coating with an Ecoflex waterproof layer to obtain the subsurface modified enhanced conductive liquid crystal elastomer fiber. By introducing the polymer brush, the driving performance of the fiber is remarkably improved; the fiber shows a rapid response characteristic, and shows excellent stability and consistency in the aspect of sensing performance at the same time. The metal conductive layer of the fiber and the fiber matrix show excellent compatibility, and it is ensured that after multiple driving cycles, the excellent driving efficiency and the excellent conductive characteristic can still be maintained.

The present invention discloses a preparation method of a poly (4-vinylpyridine) grafted carbon nanotube / sea urchin gold nanonecklace structure and its SERS application, which is a simple and effective method for preparing a necklace-like nanostructure, wherein sea urchin gold is uniformly and stably connected in series on polymer-grafted carbon nanotubes through template-assisted nanocrystal growth. First, the surface of the carbon nanotube is covalently functionalized by surface-initiated atom transfer radical polymerization. Then, sea urchin gold (SUGNPs) nanostructures are grown using the polymer-grafted carbon nanotubes as a template. This special structure can prevent the aggregation of SUGNPs and ensure the long-term stability of the obtained necklace-like SUG-CNT shish-kebab nanocomposite material. The reliability and sensitivity of the necklace-like SUG-CNT shish-kebab nanocomposite material as a SERS substrate are verified by Raman detection of malachite green.

The invention relates to the technical field of oil and gas exploitation, in particular to a dense rock submicron emulsion type interface modifier and a preparation method and application thereof. In the components, the surfactant and the cosurfactant construct a composite interfacial film to stabilize submicro-droplets, water serves as a carrier to convey hydrophobic monomers and a hydrophobic reinforcing agent to the surface of dense rock, after an initiator initiates a polymerization reaction, the hydrophobic monomers form a polymer skeleton, and the hydrophobic reinforcing agent forms a hydrophobic reinforcing agent to stabilize the submicro-droplets. A hydrophobic reinforcing agent is embedded into the framework and chemically bonded with the surface of the rock, and finally a firmly-attached modified layer with high hydrophobicity is formed. According to the compact rock submicroemulsion type surface modifier obtained by the preparation method provided by the invention, at least 93% of the particle sizes are distributed in a range of 251-423nm, and the particle size range is matched with the characteristics that compact rock is low in porosity and low in permeability, and pores are mainly in a nano-micron order. In addition, the preparation method provided by the invention is simple and convenient to operate, controllable in condition and beneficial to realizing large-scale production.

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.

This invention relates to a method for preparing ultralong polypeptide polymer brushes using a biphase polymerization system, belonging to the field of functional nanomaterials. In the reaction system of this invention, an aminated magnetic nanostirring rod is used as the core, proposing a universally applicable biphase polymerization system that successfully prepares nanorods modified with ultralong polypeptide polymer brushes. This invention employs a dichloromethane / water biphase polymerization system, utilizing the in-situ purification effect of the aqueous phase and the synergistic dipole-covalent polymerization between polypeptide chains to achieve grafting of ultrathick polypeptide polymer brushes with a single-sided shell thickness exceeding 358 nm (up to 490 nm) and a polymer molecular weight of 455.6 kDa, breaking the thickness limit of traditional surface-initiated polymerization. Addressing the problem that traditional polypeptide deprotecting agents easily corrode magnetic nanomaterials, this invention uses anhydrous aluminum chloride as the deprotecting agent, successfully achieving non-destructive deprotection. The ultralong polypeptide polymer brushes possess abundant drug binding sites; the thicker the polypeptide shell on the nanorod surface, the greater the drug adsorption capacity.

The present invention discloses a method for preparing a salt-tolerant strong cation exchange chromatography medium. The method comprises reacting a compound having a sulfate group with a polymerizable monomer having a vinyl group to prepare a polymerizable functional monomer having a sulfate group; and initiating graft polymerization of the obtained functional monomer on the surface of porous microspheres to obtain a salt-tolerant cation exchange chromatography medium. The preparation process of the method is simple and easy to operate, and a wide range of ligands can be selected. The prepared salt-tolerant cation exchange chromatography medium has a wide ionic strength tolerance range, can maintain a high protein adsorption capacity at high salt concentrations, has a wide range of applications, and can improve the separation and purification efficiency of protein drugs.

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 application belongs to the technical field of medical biomaterials, and particularly relates to a kind of poly-peptide biomimetic nanofiber scaffold with bone inductive activity and its preparation method and application.The application uses synthetic poly-peptide, and PBLG is grafted on bismuth-substituted hydroxyapatite by surface-initiated polymerization, to solve the problem of particle agglomeration and interface;Double bond-containing copolymer P[BLG co ‑(LG g ‑APEG)] is introduced, and 3D printing is used to crosslink and form covalent network to enhance mechanical properties;Combining with phase separation, ECM-like nanofiber structure is obtained.The scaffold obtained by the application has macro-pore and micro-biomimetic fiber network, and organic-inorganic hybrid components provide mineralization interface, and bismuth ion release promotes bone formation, to realize bone defect repair.

A method for modifying a material through rapid surface grafting, and a use thereof are provided. In the method, with an olefin-functionalized nanomaterial as a model matrix, a cycloolefin as a polymerization monomer, a Grubbs catalyst as an initiator, and ethyl vinyl ether as a terminator, surface olefin cross-metathesis is conducted to prepare a polyolefin-grafted nanomaterial. In the use, with a thermoplastic resin as a matrix and the surface-polyolefin-grafted nanomaterial as a reinforcing material, a composite is prepared. The compatibility between the reinforcing material and the thermoplastic resin matrix is evaluated through cross-sectional morphology and mechanical performance characterization. A chain-transfer reaction is adopted as an alternative approach for surface-initiated ring-opening metathesis polymerization to avoid the growth of polymer chains from the surface. This alternative approach can significantly improve a reaction rate, shorten a reaction time, and simplify a technical flow, and demonstrates a promising industrialization prospect.

The present invention relates to a method for preparing surface-imprinted microspheres by horseradish peroxidase-mediated surface initiation and its application. The method comprises the following steps: preparing and modifying nano-microspheres; dissolving a main monomer, a functional monomer, a polypeptide cross-linking agent, and a template protein in a water-soluble solvent to obtain a prepolymer solution; adding horseradish peroxidase-modified nano-microspheres and an initiator to the mixed solution to initiate free radical polymerization; and eluting the template protein to obtain polypeptide-crosslinked surface-imprinted microspheres. The nano-imprinted microspheres disclosed in the present invention are prepared by an enzyme-mediated free radical polymerization method, which can achieve sufficient pre-assembly of monomers and templates at high concentrations to improve the problem of poor imprinting effect in traditional free radical polymerization, while avoiding the agglomeration phenomenon that may occur under high-concentration reaction conditions. The introduction of the polypeptide cross-linking agent enables the imprinted microspheres to have highly specific selection and recognition capabilities for the target protein, and can significantly shorten the time for adsorbing the template protein.

The present invention discloses a method for preparing a super-lubricating hydrogel and its application, relating to the field of medical technology. The present invention utilizes a surface-initiated atom transfer radical polymerization reaction to graft a 2-methacryloyloxyethyl phosphorylcholine polymer onto the surface of a methacrylated gelatin hydrogel matrix to obtain a super-lubricating hydrogel. The super-lubricating hydrogel prepared by the present invention can be used as a super-lubricating interface for enhancing tribological properties of biomimetic articular cartilage, constructing a novel low-friction, wear-resistant biomimetic articular cartilage scaffold, thereby resolving the shortcomings of current cartilage repair materials. This is of great significance for promoting the development of articular cartilage repair technology and improving the quality of life of patients with articular cartilage injuries.

The present invention discloses a SiO2@pMPC chromatographic stationary phase, its preparation method, and application, belonging to the technical field of hydrophilic chromatographic stationary phases. The preparation method comprises the following steps: acidifying silica gel to obtain activated silica gel; subjecting the activated silica gel to a silane coupling reaction with a silanizing agent under a nitrogen atmosphere to obtain amino-modified silica gel; modifying the surface of the silica gel with an initiator to obtain bromosilica gel with bromine on the surface; mixing the bromosilica gel with bromine on the surface with a catalyst, a catalyst ligand, and a functional monomer; and subjecting the mixture to a surface-initiated atom transfer radical polymerization reaction at 20 to 75°C to obtain the SiO2@pMPC chromatographic stationary phase. The SiO2@pMPC chromatographic stationary phase synthesized by this method greatly improves the surface monomer grafting rate, has excellent chemical stability, and exhibits excellent chromatographic performance in actual separation and analysis applications, thus having great promotional value.

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 invention discloses an ultrathin conformal electrode based on interfacial polymerization and a preparation method and application thereof, and belongs to the technical field of electrode materials. The preparation method comprises the following steps: dissolving lipoic acid and N-hydroxysuccinimide in dichloromethane, cooling, adding dicycloethylcarbodiimide, heating, stirring and filtering in an inert atmosphere, volatilizing dichloromethane from the obtained filtrate, and precipitating and filtering in cold ether to obtain a solid S1; the method comprises the following steps: dissolving lipoic acid in absolute ethyl alcohol, adding an S1 / DMSO solution, adding an ionic liquid, dripping the obtained solution on the surface of a PBS buffer solution or secondary water, initiating a liquid-liquid interface polymerization reaction, and completely volatilizing the ethyl alcohol to obtain the electrode. The preparation conditions are mild, the operation is simple and convenient, the obtained electrode material is tightly combined with the substrate, the thickness is controllable, and the stability is high; in addition, the electrode is excellent in electrical performance, can effectively improve the equipment fitting degree and use experience in the fields of wearable equipment, biomedical monitoring, flexible display and the like, and expands the application scene and applicability of the electrode.

The invention provides a patterned hydrogel coating based on synergism of surface laser ablation and surface-initiated grafting, preparation of the patterned hydrogel coating and application of the patterned hydrogel coating in drag reduction. The preparation method comprises the following steps: carrying out plasma treatment on a substrate, soaking in a silane coupling agent solution, and drying; then soaking in an initiator solution, and drying to obtain a substrate treated by an initiator; performing patterning treatment on the initiator layer on the surface of the substrate treated by the initiator by using a laser; and then soaking in a hydrogel precursor solution, and initiating a surface controllable polymerization reaction through ultraviolet irradiation to obtain the patterned hydrogel coating. The method disclosed by the invention can be compatible with various substrates and various photo-initiated hydrogels, and the friction coefficient of the substrate can be adjusted as required by regulating and controlling the patterning of the hydrogel coating. The patterned hydrogel coating provided by the invention has excellent resistance reduction regulation and control performance, and the preparation strategy has the characteristics of strong interface bonding, high-precision patterns and multi-system applicability.

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.