14 results about "Star polymer" patented technology

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 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 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 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.

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.

This invention relates to the field of antitumor nanomedicine micelles, specifically to a charge-flipping amphiphilic star polymer, its preparation method, and its applications. The structural formula of the charge-flipping amphiphilic star polymer is shown in formula (I). This invention combines pH-responsive charge flipping, long circulation, and efficient cellular uptake with synergistic properties, as well as biodegradability, providing a new strategy to overcome the bottlenecks of traditional anticancer drugs in clinical applications. It is expected to achieve more precise drug release and higher treatment efficiency in tumor therapy.

The application discloses a kind of high transparent TPU hot melt adhesive film compositions and its production process, belong to high polymer material technical field.The composition contains TPU matrix, polymer modifier and the like component;Production process includes the synthesis of four-arm star polymer modifier, raw material vacuum dehydration, high-speed mixing, gradient temperature control extrusion granulation and gradient melting under nitrogen protection-quick cooling casting film.The application is to solve the defects of insufficient transparency, poor bonding durability and easy migration of the existing TPU hot melt adhesive film, proposes a star-shaped topological modifier design and a double covalent crosslinking synergistic scheme, realizes the molecular-level compatibility of the modifier and TPU, and finally obtains a hot melt adhesive film with high transparency, high bonding stability and excellent processing performance, suitable for optical device bonding and other high-end scenarios.

The application belongs to the technical field of cosmetics, and particularly relates to a water-soluble star-shaped polymer, a water-based sunscreen spray and a corresponding preparation method. An epoxy-terminated water-soluble star-shaped polymer is designed and synthesized, and a carboxyl-containing ultraviolet absorption group is grafted onto the epoxy-terminated water-soluble star-shaped polymer to obtain a water-soluble star-shaped polymer with a terminal grafted ultraviolet absorption group. The polysiloxane core segment provides film-forming property and hydrophobicity, the polyoxyethylene ether (EO) side chain provides water solubility, and the ultraviolet absorption group grafted at the end of the side chain provides a sunscreen effect, so that high sunscreen effect and high waterproof and sweatproof effect are achieved.

The invention relates to the technical field of coatings, and particularly discloses a sand-in-water coating as well as a preparation method and application thereof. The sand-in-water coating comprises a base material, a granulation liquid and a continuous phase. The continuous phase comprises a composite rheological regulation system consisting of gellan gum and a star polymer emulsion in a specific ratio, the gellan gum accounts for 0.1-0.5 part by weight, and the star polymer emulsion accounts for 3-8 parts by weight. The composite system enables the coating to present high viscosity at a low shear rate, and effectively prevents color particle sedimentation and water diversion; the viscosity is moderately reduced at a medium shearing rate (such as stirring and pumping), so that the operation is convenient; the viscosity is obviously reduced at a high shear rate (such as spraying), and an excellent atomization effect is obtained; after the shearing force is eliminated (coated on the wall surface), the viscosity is quickly recovered, and sagging is prevented. The invention solves the contradiction that the rheological property of the traditional sand-in-water coating is difficult to consider storage stability, construction smoothness and anti-sagging property of a coating film at the same time, and provides a high-performance product with self-adaptive rheological property.

The application discloses a kind of preparation of antibacterial surfactant and its application in pesticide suspending agent, belong to pesticide preparation technical field, the method first esterification mPEG500 succinic acid monoester is with pentaerythritol and 12-hydroxystearic acid, condensation is obtained mPEG / hydroxystearic acid co-modification star pentaerythritol, again the product occurs ring-opening reaction with epoxy propyl trimethylammonium chloride under alkaline condition, obtain four functional modification star polymer, and then composite modified silica is prepared antibacterial surfactant;The application is through the dual dispersion mechanism of star structure and modified silica, solves the problem that traditional surfactant is easily contaminated by microorganism, hard water causes particle agglomeration, poor suspended dispersion, improves antibacterial, hard water, wetting and penetration performance, so that surfactant has long-acting stable dispersion and synergistic antibacterial capacity, meets the use requirement of pesticide suspending agent storage and transportation and different water quality farmland.