54 results about "Star polymer" patented technology

The invention discloses a multi-scale synergistically enhanced self-healing solid polymer electrolyte and a preparation method thereof, and belongs to the technical field of electrolyte materials. The preparation method of the electrolyte comprises the following steps: S1, adding the eight-arm star polymer, the carborane lithium salt, the neutral plastic crystal additive, the ionic liquid monomer and the crown ether functionalized boron alkene two-dimensional filler into a mixed solvent to form electrolyte slurry; s2, uniformly coating a base material with the electrolyte slurry to form a wet film, and drying the wet film; s3, transferring the dried membrane to an environment filled with inert gas, and initiating in-situ polymerization of an ionic liquid monomer by using ultraviolet irradiation to form a polyionic liquid nanofiber network; and S4, placing the membrane under a vacuum condition at a constant temperature of 120 DEG C for 5 hours to obtain the solid polymer electrolyte membrane. The solid polymer electrolyte membrane provided by the invention overcomes the problems of low ionic conductivity, low lithium ion transference number, insufficient mechanical properties, poor interface stability, narrow electrochemical window and the like of the existing solid polymer electrolyte.

The invention discloses a cellulose coated diaphragm and a preparation method thereof in the field of lithium ion batteries, the diaphragm comprises alpha-cellulose pulp, a cellulose grafted phenylboronic acid-co-oligomeric ethylene oxide copolymer, a thermal response star zwitterionic polymer and nano aluminum oxide, and an N-methylmorpholine-N-oxide aqueous solution is adopted as a solvent system. The preparation method comprises the following steps: firstly synthesizing a cellulose grafted copolymer with dynamic borate bonds through atom transfer radical polymerization, then preparing a star polymer with thermal response arms and zwitter-ion terminals by taking cyclodextrin as a core, and finally mixing all the components to prepare coating slurry. And the composite diaphragm is prepared through the processes of coating, phase conversion, ultraviolet curing and drying. The diaphragm combines the thermal stability and lyophilic property of cellulose, forms a dynamic self-adaptive interface layer through the synergistic effect of two functional compounds, has the advantages of active safety protection, dendritic crystal inhibition, long cycle life and the like, and remarkably improves the comprehensive performance of the lithium ion battery.

Provided is an aqueous based styrene-diene polymer emulsion composition including: i) from 2 to 50 wt. % of one or more polymers including linear polymers characterized by the formula:star polymers characterized by the formula:or combinations thereof; wherein D′, PA, D″, n and X are defined herein; ii) from 0.05 to 5.0 wt. % of one or more surfactants; and iii) the remainder of the composition comprising water. Also provided are an electrode slurry composition for a secondary metal ion battery composition, a secondary metal ion battery anode, a method of improving the life of a secondary metal ion battery, a method of making an aqueous based styrene-diene polymer emulsion composition, and a method of making an electrode slurry composition for a secondary metal ion battery.

The present invention refers to a polymer obtainable by reacting lactide, optionally glycolide, and an alcohol having the molecular formula C5H12O5, in the presence of at least one catalyst. Furthermore, the present invention refers to a composition comprising at least one polymer according to the present invention and at least one flow agent. In addition, the present invention pertains to a SLS 3D printing method comprising the steps a) providing a powder of the at least one polymer according to the invention or a composition according to the invention, b) heating the powder or the composition of step a) in a chamber, c) sintering by applying laser. Furthermore, the present invention pertains to a 3D printing method of a freeformer, according to an injection molding process, providing pellets of the polymer according to the invention or a powder of the polymer according to the invention. Finally, the present invention refers to an article comprising or consisting of the polymer according to the present invention, optionally obtained by one of the methods of the present invention.

This invention discloses a four-armed star-shaped polymer containing a polyoxyethylene structure, its preparation method, composition, and applications. The polymer is prepared by mixing an unsaturated organic carboxylic acid compound, an unsaturated sulfonic acid compound, and water, stirring to obtain a reaction solution, and continuously stirring and heating the reaction solution. An aqueous solution of a polyether macromonomer compound and the initiator aqueous solution are added to the heated reaction solution, followed by polymerization and purification. The polymer structure contains a large number of carboxyl groups, sulfonic acid groups, and ether groups, as well as abundant polyoxyethylene groups and alkyl chains, giving the polymer good water solubility and excellent chelating properties for metal ions. The polymer prepared by this method shows good effects in cleaning, defoaming, and scale inhibition. Furthermore, compositions formed by combining the polymer with other corrosion and scale inhibitors exhibit good compatibility and can be used for scale inhibition in high-hardness water.

The invention discloses a polyether-ether-ketone composite material based on recycled carbon fibers as well as a preparation method and application thereof, and belongs to the technical field of carbon fiber reinforced thermoplastic resin composite materials. The composite material is prepared from the following components in parts by weight: 10 to 30 parts of treated recycled carbon fiber, 60 to 80 parts of PEEK resin and 5 to 15 parts of compatilizer. The preparation method comprises the following steps: adding ZIF-8 derived porous carbon into a sizing agent which takes a PEEK oligomer as a main component, repairing surface defects of recycled carbon fibers in a mode of combining ultrasonic oscillation sizing with vacuum impregnation, and combining with an added multi-arm star-shaped polymer compatilizer; the prepared recycled carbon fiber / polyether-ether-ketone composite material has the characteristics of high interfacial compatibility, high-strength stability and the like, and can be economically and efficiently applied to the field of robot lightweight, such as robot joint shells, arm levers and the like.

The invention belongs to the technical field of chemical production, aims to solve the problem of catalyst deactivation caused by crystallization and wrapping in the existing hydrogenated bisphenol A (HBPA) production process, and provides a star polymer for inhibiting crystallization and wrapping in the HBPA production process as well as a preparation method and application thereof. The star polymer provided by the invention takes a polyfunctional group compound (such as pentaerythritol and diethylenetriamine) as a core, a polyacrylic acid main chain with the molecular weight of 5,000-20,000 g / mol is extended, a polyethylene glycol side chain with the molecular weight of 500-2,000 g / mol and the grafting rate of 20%-50% is grafted on the main chain, and through the hydrogen-bond interaction of a carboxylic acid group and HBPA crystals and the steric hindrance effect of the polyethylene glycol side chain, the molecular weight of the HBPA crystals is increased, so that the molecular weight of the HBPA crystals is increased, and the molecular weight of the HBPA crystals is increased. Devitrification wrapping is efficiently inhibited. The invention develops a method which is efficient and environment-friendly and does not introduce new impurities, is used for inhibiting the crystallization wrapping phenomenon in the hydrogenated bisphenol A production process, and has important industrial application value.

The invention discloses a high-performance wear-resistant POM composite material and a preparation method thereof, modified resin and polyformaldehyde are subjected to melt extrusion, soaked in water and cooled, the POM composite material is prepared, modified resin molecules are dendritic-star polymers, and a dendritic multi-arm structure can effectively disperse stress when the composite material is subjected to external force, so that the wear resistance of the composite material is improved, and the wear resistance of the composite material is improved. Stress concentration in the composite material is reduced, the impact resistance of the composite material is improved, the elastic modulus of the composite material can be increased through a central cross-linking point, meanwhile, the cross-linking points can serve as physical cross-linking points to help to absorb and disperse external force and increase the toughness of the material, and the dendritic multi-arm side chain is a polyurethane elastomer, so that the impact resistance of the composite material is improved. A molecular chain contains boric acid ester bonds, so that the toughness and the impact resistance of the composite material can be further improved, and when the composite material is soaked in water, siloxane in modified resin molecules can be hydrolyzed and crosslinked, so that the crosslinking degree is slightly increased, and the mechanical strength of the composite material is further improved.

The present disclosure pertains to a 3D scaffold for cell growth and proliferation. In particular, the present disclosure provides a method of producing an artificial 3D scaffold to support stem cell growth and later their differentiation, by converting biodegradable amphiphilic copolymers (star polymer) into nanowire scaffolds, through a molecular self-assembly process. The invention also relates to the use of said scaffold for cell culture and / or transplantation.

The invention belongs to the technical field of chemical production, aims to solve the problem of catalyst deactivation caused by crystallization and wrapping in the existing hydrogenated bisphenol A (HBPA) production process, and provides a star polymer for inhibiting crystallization and wrapping in the HBPA production process as well as a preparation method and application thereof. The star polymer provided by the invention takes a polyfunctional group compound (such as pentaerythritol and diethylenetriamine) as a core, a polyacrylic acid main chain with the molecular weight of 5,000-20,000 g / mol is extended, a polyethylene glycol side chain with the molecular weight of 500-2,000 g / mol and the grafting rate of 20%-50% is grafted on the main chain, and through the hydrogen-bond interaction of a carboxylic acid group and HBPA crystals and the steric hindrance effect of the polyethylene glycol side chain, the molecular weight of the HBPA crystals is increased, so that the molecular weight of the HBPA crystals is increased, and the molecular weight of the HBPA crystals is increased. Devitrification wrapping is efficiently inhibited. The invention develops a method which is efficient and environment-friendly and does not introduce new impurities, is used for inhibiting the crystallization wrapping phenomenon in the hydrogenated bisphenol A production process, and has important industrial application value.

The invention discloses preparation of an antibacterial surfactant and application of the antibacterial surfactant in a pesticide suspending agent, and belongs to the technical field of pesticide preparations.The method comprises the steps that esterified mPEG 500 succinic acid monoester, pentaerythritol and 12-hydroxystearic acid are subjected to condensation to obtain mPEG / hydroxystearic acid co-modified star-shaped pentaerythritol; the product and glycidyl trimethyl ammonium chloride are subjected to a ring-opening reaction under the alkaline condition, a four-function modified star polymer is obtained, and then the four-function modified star polymer is compounded with modified silicon dioxide to prepare the antibacterial surfactant. Through a double dispersion mechanism of a star-shaped structure and modified silicon dioxide, the problems that a traditional surfactant is easily polluted by microorganisms, particles are agglomerated due to hard water, and the suspension dispersion is poor are solved, the antibacterial property, the hard water resistance, the wetting property and the penetrating property are improved, the surfactant has long-acting stable dispersion and synergistic antibacterial ability, and the service life of the surfactant is prolonged. The storage and transportation of the pesticide suspending agent and the use requirements of farmlands with different water qualities are met.

The invention discloses a preparation method of cationic polyacrylamide for an oil field in the field of oilfield chemical agents, which comprises the following steps: firstly, preparing a carbon dioxide response type star polymer modified material which is synthesized by taking ethylenediamine as a core through four-step reaction: firstly, reacting with a brominating reagent to form a four-arm initiator; carrying out atom transfer radical polymerization on the star-shaped polymer, dimethylaminoethyl acrylate and hexafluorobutyl acrylate to construct a star-shaped skeleton; then carrying out inclusion modification with hydroxypropyl beta cyclodextrin through host-guest interaction; and finally, performing double crosslinking through zinc ion coordination and etherification reaction to obtain the modified material. The modified material, acrylamide, a cationic monomer and an auxiliary monomer are dissolved in water, a two-stage polymerization process of low-temperature pre-polymerization and high-temperature post-polymerization is performed, and granulation, drying and crushing are performed to obtain a final product. The polyacrylamide prepared by the method shows excellent tackifying performance and temperature-resistant and salt-resistant performance in oil field application, and is especially suitable for tertiary oil recovery operation under high-temperature and high-salt oil reservoir conditions.

The present invention discloses a high-strength waterproof concrete pole, which belongs to the technical field of concrete materials. The pole comprises high-strength waterproof concrete, a steel skeleton and a waterproof coating applied on the surface of the pole. The high-strength waterproof concrete comprises 750-850 kg / m of cement in terms of mix ratio. 3 Silica fume 130~170kg / m 3 , sand 1000~1300kg / m 3 , Steel fiber 150~250kg / m 3 , water reducing agent 10~15kg / m 3 , water 170~190kg / m 3 and defoaming agent 0.5~1.5kg / m 3 ; A waterproof coating and a defoamer with a multi-arm star polymer as the main component are used to achieve the effect of waterproofing both inside and outside; the defoamer of the present invention has good dispersibility and defoaming performance in concrete, and can also fill some micropores of the concrete to a certain extent.

The application discloses a kind of self-healing solid-state polymer electrolyte of multiscale synergistic enhancement and preparation method thereof, belong to electrolyte material technical field.The preparation method of electrolyte: S1, eight-arm star polymer, lithium carborane salt, neutral plastic crystal additive, ionic liquid monomer, crown ether functionalized boronene two-dimensional filler are added into mixed solvent to form electrolyte slurry;S2, electrolyte slurry is uniformly coated on substrate to form wet film, and is dried;S3, the film of drying is transferred to the environment filled with inert gas, and in-situ polymerization of ionic liquid monomer is initiated using ultraviolet irradiation to form polyionic liquid nanofiber network;S4, the film is placed at 120 DEG C under vacuum condition for 5 h, and solid-state polymer electrolyte film is obtained.The solid-state polymer electrolyte film of the application overcomes the problems of low ionic conductivity, low lithium ion transference number, insufficient mechanical properties, poor interface stability, narrow electrochemical window and other problems existing in existing solid-state polymer electrolyte.

The present invention relates to the field of polymer compound preparation, and in particular to a macromolecular branching agent, a star-branched polymer, and a preparation method and application thereof, wherein the macromolecular branching agent comprises a white carbon black carrier; the outer surface of the white carbon black carrier is chemically coupled with a coupling agent; and the coupling agent is grafted with a telechelic polymer segment containing a double bond. The present application uses a coupling agent to improve the dispersibility of white carbon black, and fixes it as a reaction site for grafting with a telechelic polymer. This method can more simply and effectively prepare a star-shaped polymer with better performance on the basis of achieving a good dispersion of white carbon black to achieve a reinforcement effect.

Novel star polymers comprising graft copolymer backbone arms, for example, for the delivery of active agents and / or imaging agents to target cells or tissues.

The application discloses a multifunctional multi-arm star polymer and a preparation method and application thereof, and belongs to the technical field of biomedical materials.The functional multi-arm star polymer disclosed by the application takes an internal ring polymer as a core molecule, and a functionalized acrylate monomer is used to prepare the multi-arm star polymer through ATRP.The polymer prepared by the application has the characteristics of adjustable terminal reaction site of the core molecule, controllable and narrow molecular weight distribution of the number, length and functionalization unit of the arm molecule, excellent affinity to mRNA, and the like.The complex nanoparticles formed by the polymer and mRNA are uniformly distributed and have good stability.The in-vitro transfection result shows that the polymer can efficiently deliver mRNA in various tissue cell lines, which provides an application basis for further genetic disease, cancer gene therapy and virus vaccine development.

The application relates to the technical field of polymer micelles, in particular to a pH response star polymer micelle and a preparation method and application thereof. The pH response star polymer micelle takes pentaerythritol as a core, and other block structures include polyethylene glycol monomethyl ether, a dynamic imine bond, gamma-amino-epsilon-caprolactone and epsilon-caprolactone. After loading an anticancer drug doxorubicin, the polymer micelle can stably exist in a neutral environment of human normal tissues, and can control the release of the drug in a slightly acidic environment of tumor cells.

The invention discloses a star polymer polyester dye dispersant based on host-guest interaction and a preparation method thereof. The invention discloses a star-shaped polymer polyester dye dispersant based on interaction of a subject and an object. The star-shaped polymer polyester dye dispersant comprises a subject and 3-6 arms which are circumferentially and uniformly distributed and connected to the subject, the configuration of the arm is as follows: # imgabs0 #; in the formula, R is a terpolymer chain segment of vinyl pyrrolidone, vinyl imidazole and a vinyl imidazole-cyclodextrin object derivative, and the structural general formula of the terpolymer chain segment is as follows: # imgabs 1 #; wherein the cyclodextrin derivative main body X is an alpha-cyclodextrin derivative main body or a beta-cyclodextrin derivative main body or a gamma-cyclodextrin derivative main body; the polymerization degree m of the vinyl pyrrolidone is 5 to 20; the total polymerization degree n of the vinyl imidazole and the vinyl imidazole-cyclodextrin guest derivative is 10 to 30; the polymerization degree n-n'of the vinyl imidazole-cyclodextrin guest derivative is 1-9, and the homogeneity macromolecules can improve the stability and the compounding property with other substances.

The invention relates to a resin modifier, in particular to a star rubber polymer and application thereof as a resin modifier. The method comprises the following steps: taking conjugated diene as a monomer, and carrying out anionic polymerization and coupling to obtain a star polymer; and further carrying out selective hydrogenation and epoxidation, graft copolymerization modification and isocyanate functionalization on the obtained polymer to obtain the star rubber polymer. The star-shaped rubber polymer with molecular weight of 1-50,000 and arm number of less than 8 is prepared by the method. The product obtained by the invention is used as a modifier for toughening epoxy resin (EP) or improving the compatibility of a blending system of EP and impact polystyrene resin (HIPS).

The invention discloses a star polymer-based front silver paste and a preparation method thereof, and a Topcon solar cell, the star polymer-based front silver paste comprises the following components by weight: 85-92% of silver powder, 1.0-4.0% of glass powder, and 4.61-15% of an organic carrier; wherein on the basis of the total weight of the front silver paste, the organic carrier comprises 0.1-4.0% of a star polymer. According to the invention, the problems of grid breaking and virtual printing of a superfine line in a traditional formula are solved, the height-width ratio of the grid line is improved, the series resistance of the grid line is reduced, and the electrical performance is improved.

The invention belongs to the technical field of anion exchange membranes, and discloses a star polymer anion exchange membrane as well as preparation and application thereof. The piperidine type three-monomer polymer with excellent alkali stability, dimensional stability, chemical stability and mechanical properties is synthesized. The preparation method comprises the following steps: constructing a star topological structure in a polymer skeleton by controlling the feeding sequence of monomers, reacting the polymer with iodomethane to obtain a quaternized polymer, and casting the membrane by using the quaternized polymer. Compared with a traditional branched ionic membrane, the prepared membrane has the advantages that the conductivity and the dimensional stability are remarkably improved, and excellent performance is achieved in an anion exchange membrane fuel cell.

The invention provides a soil conditioner for soil remediation and a preparation process thereof, and belongs to the technical field of soil remediation. The preparation process comprises the following steps: synthesizing a four-arm star polymer; preparing a modified ZSM-5 molecular sieve; preparing a complex microbial inoculant; and preparing the soil conditioner. The ZSM-5 molecular sieve is modified by the four-arm star-shaped polymer, so that proper gaps are kept among soil particles, the air permeability of soil is enhanced, plant root systems can smoothly breathe, root system growth and nutrient absorption are promoted, microorganisms can be protected from being damaged by harmful substances in the soil after the modified ZSM-5 molecular sieve is used for loading microorganisms, and the soil quality is improved. The activity of microorganisms is maintained and the reproduction of the microorganisms is promoted.

The invention relates to functionalized cellulose composite aerogel for water treatment and a preparation method thereof. The preparation method comprises the following steps: firstly, growing ZIF-8 between MXene layers in situ; then mixing the obtained ZIF-8-coated MXene material with AM and 2-AMPS, carrying out in-situ growth of a star polymer under the initiation of a star chain transfer agent and an initiator, and finally dispersing the compound in a sodium carboxymethyl cellulose aqueous solution to form the lightweight porous composite aerogel. The star polymer is adopted to synergistically construct the composite aerogel of the ZIF-8 (at) MXene composite material and the cellulose, the star polymer provides abundant acylamino and sulfonic acid group adsorption sites, the star polymer, the ZIF-8 and MXene materials generate a synergistic interaction effect, and the adsorption capacity on metal ions and organic matters is remarkably improved.

A drilling fluid includes an aqueous phase, a clay-based component, and an amphiphilic branched star polymer. The amphiphilic branched star polymer is a crosslinked, polymerized reaction product of crosslinker C, hydrophobic monomer B, and hydrophilic monomer A. The crosslinked polymerized reaction product includes a plurality of block copolymer segments of hydrophobic monomer B and hydrophilic monomer A interconnected via crosslinker C.

This invention relates to a self-compacting concrete and its preparation method, belonging to the field of concrete technology. The raw materials for the self-compacting concrete provided by this invention include cement, fly ash, slag powder, sand, crushed stone, a high-performance water-reducing agent, an air-entraining agent, and water. The high-performance water-reducing agent is obtained by blending a polycarboxylate water-reducing agent, an organosilicon-modified hyperbranched star polymer, and a polyether-modified organosilicon polymer. The air-entraining agent is obtained by compounding sodium dodecylbenzene sulfonate and sodium fatty alcohol polyoxyethylene sulfonate. The self-compacting concrete prepared by this invention has a high water reduction rate, low slump loss, and high stability, resulting in a significant improvement in overall performance.

A color conversion composition as one embodiment of the present invention is a color conversion composition containing at least one light-emitting material and a binder resin. The binder resin includes at least one branched polymer selected from the group consisting of star polymers, graft polymers, and hyperbranched polymers.

The invention discloses a waterborne epoxy coating as well as a preparation method and application thereof, and relates to the technical field of coatings. The waterborne epoxy coating is prepared from a component A and a component B, the component A comprises waterborne epoxy resin, spherical zinc powder, flaky zinc powder, nano silicon dioxide and carbon nanotubes; the component B comprises a curing agent, a directional arrangement auxiliary agent and an anchoring auxiliary agent; the directional arrangement auxiliary agent is an auxiliary agent which has a directional arrangement effect on the carbon nano tube and the flaky zinc powder; the anchoring aid comprises a block copolymer and / or a star polymer. The waterborne epoxy coating has the advantages of being high in drying speed, high in water resistance and salt spray resistance, good in corrosion resistance, excellent in weather resistance and high in adhesive force, also has good welding resistance and cutting resistance, is suitable for the field of heavy corrosion prevention, and is particularly suitable for being used as workshop primer to be applied to the fields of containers, ships, steel structure bridges and petrochemical mechanical equipment.

The application provides a platable polypropylene composite material. The platable polypropylene composite material comprises the following components in parts by weight: 40-60 parts of polypropylene, 30-50 parts of talcum powder, 3-8 parts of polyethylene glycol star polymer, 1-5 parts of lubricant, and 0.1-1 parts of antioxidant. The main chain of the polyethylene glycol star polymer is a copolymer chain formed by benzyl ether with one vinyl group on each benzene ring, and the branch chain is a chain formed by the reaction of aldehyde groups on the benzene ring with polyethylene glycol. The D50 particle size of the talcum powder is 1-5 microns. The weight average molecular weight of the polyethylene glycol star polymer is 10000-30000. By adding the polyethylene glycol star polymer with a specific structure and the small particle size talcum powder, the polypropylene composite material has high rigidity and excellent plating effect, meets the application requirements, and the shrinkage rate of the polypropylene composite material is close to that of ABS material, so that the polypropylene composite material can directly replace the ABS material without updating the mold, and has a good production application prospect.