229 results about "Synthetic polymer" patented technology

The invention discloses a biomass-based reinforcing agent for paper and application of the biomass-based reinforcing agent. The reinforcing agent comprises a biomass-based material, the biomass-based material comprises a micron-sized structure and a nano-sized structure distributed on the micron-sized structure. The reinforcing agent prepared by the invention has abundant nanostructures, is beneficial to physical crosslinking such as entanglement and bridging of fibers in paper pulp, and improves the wet strength of paper; the preparation of the reinforcing agent is a simple physical process, and a complex synthesis chemical process for synthesizing a polymer in a traditional organic reinforcing agent is avoided; the reinforcing agent is prepared by a dissolution regeneration method, so that the energy consumption is low, the solvent can be recycled and reused, no chemicals are consumed, and the reinforcing agent is environment-friendly; the reinforcing agent prepared by the invention can achieve a satisfactory wet strength effect at a lower content.

The invention discloses a method for in-situ rapid growth of a dual-network hydrogel coating on the surface of a base material by a one-step method, which comprises the following steps: putting the base material with an adhesion initiation layer on the surface into a hydrogel precursor solution, and carrying out in-situ polymerization for 0.1-10 minutes under light irradiation, wherein the adhesion initiation layer comprises an adhesive compound based on a catechol group and a first photoinitiator, and the hydrogel precursor solution comprises a natural polymer containing tyrosine, an acrylic monomer, a cross-linking agent and a second photoinitiator, and wherein the first photoinitiator and the second photoinitiator are different from each other and are independently selected from a divalent ruthenium compound and a persulfate. Compared with the prior art, the natural / synthetic polymer double-network gel coating with biological activity and mechanical property can grow on the surfaces of different substrates more quickly and efficiently through a one-step method; and the base material, the surface of which is modified by the in-situ grown double-network hydrogel coating, obtained by the method can be applied to in-vivo medical apparatuses and instruments.

The invention provides a compound microbial agent capable of resisting diseases and insect pests and a preparation method thereof, and the compound microbial agent consists of the following substances in parts by mass: 50-100 parts of bacillus subtilis, 40-80 parts of beauveria bassiana, 35-75 parts of trichoderma harzianum, 20-50 parts of modified straw powder, 10-15 parts of a humic acid-diatomite complex, 10-15 parts of trehalose, 5-10 parts of chitin powder and 5-10 parts of shellac. According to the invention, the modified straw powder and the humic acid-diatomite complex are adopted as a core carrier, so that the defects of poor adsorbability and nutrition deficiency of the traditional diatomite or synthetic carrier are overcome, and a high-porosity and nutrient-rich living environment is provided for bacillus subtilis, beauveria bassiana and trichoderma harzianum; compared with the prior art, the method provided by the invention has the advantages that the cost is low, the field planting rate and the field survival rate of viable bacteria in the microbial inoculum are remarkably improved, meanwhile, controllable coating is performed by utilizing an ethanol solution of shellac, a refractory synthetic polymer coating material is replaced, thalli are protected from environmental stress, and meanwhile, the risk of lasting residual pollution of a chemical coating material in soil is avoided.

A recycling system comprises a quality determination unit 710, which determines the quality of a solid material, such as PET flakes containing a polymer to be recycled, based on a predetermined quality determination criterion; a material sorting unit 720, which sorts the solid material into a high-quality material, which is determined to have a quality higher than the quality determination criterion, and a low-quality material, which is determined to have a quality lower than the quality determination criterion; a mechanical recycling device 900, which carries out a mechanical recycling process on the high-quality material; and a chemical recycling device 100, which carries out a chemical recycling process on the low-quality material.The chemical recycling device 100 includes a reaction vessel 300 for depolymerization, which decomposes the low-quality material into a depolymerized product through a depolymerization reaction; foreign material removal devices 340 to 360, which remove foreign material from the depolymerized product; a reaction vessel 400 for polymerization, which synthesizes the depolymerized product into a polymer through a polymerization reaction; and a polymerization promotion device 500, which increases the degree of polymerization of the polymer.

A fracturing fluid for fracturing subterranean formations comprising ascorbic acid. The fracturing fluid can use ascorbic acid to delay increases in viscosity until desired. The viscosity increase can then be maintained over a period of time to perform fracturing operations.

The invention provides temperature-sensitive enhanced composite hydrogel as well as a preparation method and application thereof. The temperature-sensitive enhanced composite hydrogel is prepared from the following raw materials: a triblock copolymer, hydroxybutyl chitosan and an aqueous medium. According to the invention, the synthetic polymer material and the natural biopolymer derivative are compounded, so that the defects of a single-component material are overcome, the mechanical strength and stability of the hydrogel are remarkably improved, and the prepared hydrogel has good biocompatibility and degradability.

The invention relates to the technical field of food packaging, in particular to a plasma modified polysaccharide intelligent packaging film and a preparation method and application thereof. The plasma modified polysaccharide film forming matter comprises a compound obtained by blending plasma modified polysaccharide and a water-soluble synthetic high-molecular polymer, and a nano-carrier loaded with a natural pH indicator. The invention aims to provide a degradable multifunctional intelligent packaging film which aims to overcome the defect that the stability of a natural indicator and the synergism of a film-forming substrate are insufficient. The method mainly solves the problems of degradation and migration of anthocyanin (ACNs) under the interference of light / heat / pH fluctuation and complex food matrix components, poor compatibility / dispersibility of a proteoglycan nano-carrier and a film-forming matrix, uneven color change caused by agglomeration, insufficient water resistance, biological activity, mechanical property and gas / water vapor barrier of a starch-based film and the like. And rapid, reversible and naked-eye-readable visual response can be realized in a pH / TVBN interval related to aquatic product spoilage.

The invention discloses a preparation method of an alpha halogenated acrylate polymer with porous performance and narrow distribution. According to the method, an initiator does not need to be additionally added, and the yield can reach gt; the obtained halogenated acrylate polymer has the characteristics of porosity and narrow molecular weight distribution. The preparation of the alpha halogenated acrylate polymer material does not need additional addition of an initiator, and a polymer can be synthesized by using a one-pot method. The synthesized alpha-halogenated acrylate polymer has a degradable characteristic and a porous property, and can generate a porous fibrous structure during processing. The method is simple to operate and high in yield, the porous and narrow-distribution alpha-halogenated acrylate polymer can be obtained, and the method has application prospects in the fields of plastic processing, plastic green circulation and the like.

The application belongs to the technical field of polymer materials and engineering, and discloses a preparation method of a phosphate cross-linked organic porous uranium extractant. A phenylacetylene is cross-linked with 1,4-dithioerythritol through a click chemistry reaction by using a photo-induced cross-linking method. Compared with common mercaptans, 1,4-dithioerythritol contains an adsorption group. The cross-linking reaction is carried out under the condition that the ratio is 1:3 and the light irradiation time is 1h. An organic polymer PCM with a porous structure is synthesized. After the synthesized polymer is subjected to Soxhlet extraction for 48h, the polymer is modified by phosphating with phosphorus oxychloride to prepare a porous polymer containing a phosphate group. After the synthesized polymer is subjected to Soxhlet extraction for 48h and is dried, a purple black powder P-PCM is obtained. The target polymer can be synthesized only through three steps of reactions. The polymer preparation is relatively simple under the photo-induced cross-linking, which is of great significance to improving the uranium adsorption capacity. The preparation is simple, the reaction is stable, the safety is high, and the cost is low through the click chemistry reaction.

This item is a metal fitting for fixing a synthetic polymer roofing sheet as a waterproof sheet that covers at least a portion of the floor of a structural body, and is used to fix an arrangement body (for example, a solar panel unit or piping and wiring connected to a solar panel unit) that is placed on the synthetic polymer roofing sheet.

The present invention relates to a cleaning textile for cleaning a surface, wherein the cleaning textile is designed to be attached to a carrier and has a rear side facing the carrier and a cleaning side facing the surface to be cleaned, wherein the cleaning textile comprises a pile fabric, pile warp-knitted fabric or pile knitted fabric having pile filaments on the cleaning side, and wherein the pile fabric, pile warp-knitted fabric or pile knitted fabric is formed from one or more multifilament yarns based on synthetic polymers. At least the pile filaments are formed from a multifilament yarn based on one or more synthetic polymers which contain at least one additive for improving biodegradability, and / or which comprise at least one modified polymer for improving biodegradability.

This invention relates to the field of Xuan paper production, specifically to a specialized modern papermaking machine for producing Xuan paper without synthetic polymers. The papermaking machine includes an interconnected pulp tank and headbox. Inside the headbox, a cylindrical wire cage with its lower part immersed in the pulp is rotatably mounted. As the cylindrical wire cage rotates, a loose, wet sheet is formed on the wire surface. An air compressor is located beside the pulp tank. A closed-loop long wire is located on one side of the cylindrical wire cage. The long wire is tangential to the outer wall of the cylindrical wire cage, forming a transfer bonding area. A peeling mechanism is provided in the transfer bonding area to transfer the wet sheet to the long wire. The peeling mechanism includes a peeling plate with a main air channel connected to the air compressor. One end of the peeling plate has a rubber cone plate with a peeling air channel, and the other end has a peeling water channel. A pressing mechanism is located at the upper end of the peeling plate. This invention enables continuous production of Xuan paper, fully preserving the core qualities of traditional Xuan paper. The wet sheet is transferred without damage or residue, exhibiting strong production stability and suitability for large-scale continuous production of Xuan paper.

This invention discloses an artificial corneal endothelial graft based on natural degradable proteins, its preparation method, and its application, relating to the field of medical implant materials technology. Currently, artificial corneal endothelial grafts for corneal endothelial decompensation are all non-degradable synthetic polymer materials. This invention uses a natural degradable material as the substrate to prepare the graft. A material preparation stock solution is obtained by mixing a silk fibroin solution extracted from a high-salt solution with a certain proportion of glycerol. The mixed solution is then spin-coated onto a mold using a gradient method, and dried to obtain a silk fibroin film. The obtained silk fibroin film is then circumcised and placed in a mold for hot-press steam fumigation. The resulting silk fibroin film can serve as an artificial corneal endothelial graft, providing a donor source for artificial corneas and possessing potential application value in corneal transplantation.

The invention provides a multi-nozzle 3D printing composite scaffold capable of promoting bone regeneration as well as a preparation method and application thereof, the multi-nozzle 3D printing composite scaffold is prepared by adopting multi-nozzle collaborative printing of a 3D printing system, the multi-nozzle 3D printing composite scaffold comprises a synthetic polymer material printed by a high-temperature nozzle and a hydrogel material printed by a low-temperature nozzle, and microfilament patterns formed by the two materials are alternately arranged. Wherein the synthetic polymer material is prepared from polycaprolactone and magnesium oxide nano particles; the hydrogel material is prepared from methacrylated gelatin, methacrylated gilan gum and double drug loading nano particles. The 3D printing composite scaffold provided by the invention has excellent mechanical properties, the double-drug-loaded nanoparticle sequence released osteogenesis promoting and vascular promoting drug coupling osteogenesis-vascularization promoting effects, released magnesium ions synergistically enhance osteogenesis and vascularization performance, and the 3D printing composite scaffold has a good bone defect repair effect and has application potential in the field of bone tissue repair.

The application discloses an anti-bending artificial blood vessel, which comprises an artificial blood vessel inner layer, a synthetic polymer anti-bending ring and an artificial blood vessel outer layer; the artificial blood vessel inner layer is a synthetic polymer tube body; the artificial blood vessel outer layer is a synthetic polymer fiber membrane; the shape of the synthetic polymer anti-bending ring is a non-equidistant spiral structure; the synthetic polymer anti-bending ring is wound on the outer wall of the artificial blood vessel inner layer, is between the artificial blood vessel inner layer and the artificial blood vessel outer layer, and is fixed by being covered by the artificial blood vessel inner layer and the artificial blood vessel outer layer. The application further discloses a preparation method of the artificial blood vessel. The application can make the artificial blood vessel to be bent by 180 degrees in a full ring without flat collapse and kinking, can ensure that the whole artificial blood vessel has good anti-bending performance, can effectively improve the anti-bending performance of the artificial blood vessel, and can effectively improve the compliance of the artificial blood vessel.

The utility model relates to the technical field of waterproof coiled materials, in particular to a synthetic polymer roof waterproof coiled material which comprises a base tire layer, a heat preservation layer, a protection layer, a reinforcing mechanism and a connecting mechanism. A bonding layer is arranged at the bottom of the base tire layer; the insulating layer is arranged at the top of the base tire layer for slowing down heat exchange on two sides of the insulating layer; the protective layer is arranged at the top of the heat preservation layer and used for improving the durability of the coiled material; the protective layer comprises a fireproof layer, a waterproof layer and an anti-corrosion layer; the reinforcing mechanism is arranged in the base tire layer and used for improving the overall strength of the coiled material; the connecting mechanisms are arranged on the two sides of the base tire layer and used for connecting adjacent coiled materials. The connecting mechanism comprises a connecting strip; the connecting strips are fixedly connected with the protective layer, and connecting grooves matched with the connecting strips are formed in the surface of the base tire layer. Through the arrangement of the connecting mechanism, the waterproof performance of the connecting position of the waterproof coiled material is guaranteed, meanwhile, the difficulty of laying the waterproof coiled material is greatly reduced, and then the laying efficiency of the waterproof coiled material is improved.

The application belongs to the technical field of biological medicine and medical cosmetology, and particularly relates to a kind of composition for mitochondrial protection type cosmetology and skin repair based on hydrogel and application thereof, the composition comprises a mitochondrial protection system and a synergistic active ingredient, the mitochondrial protection system comprises a hydrogel and a mitochondrial protection solution, the hydrogel comprises a synthetic polymer, and the mitochondrial protection solution comprises 200-300 mM mannitol, 0.2-5 mM ATP and 0-5% w / v trehalose; the synergistic active ingredient comprises a mixture of one or more of 0.01-0.1% ascorbyl palmitate, 0.1-1 mM glutathione and 0.5-2% nicotinamide. The composition is applied to microneedle repair, ice needle patch preparation and mask preparation and other aspects; through microneedle repair, ice needle patch or mask and other forms, effective delivery of mitochondria is realized, all-round care and repair are provided for the skin, and the delivery capacity is improved.

The invention provides a preparation method of acacia gum nano-composite hydrogel. The preparation method comprises the following steps: S1, mixing an acacia gum aqueous solution with a free radical initiator, and then sequentially adding acrylonitrile, CuFe2O4 nanoparticles and a cross-linking agent into the mixture to obtain the acacia gum nano composite hydrogel. The acacia gum nano-composite hydrogel combines the characteristics of a natural polymer, a synthetic polymer and inorganic nanoparticles, and is an effective adsorbent for removing heavy metals in an aqueous solution, the prepared magnetic hydrogel is treated by hydroxylamine hydrochloride, so that a nitrile group is converted into an amidoxime group to serve as a bidentate ligand, and the adsorption capacity of the hydrogel is improved. The existence of CuFe2O4 in the acacia gum nano-composite hydrogel makes the recoverable magnetic hydrogel possible, the recoverable magnetic hydrogel can be easily removed from an aqueous solution and regenerated, and after three continuous cycles, the recoverable magnetic hydrogel still has high heavy metal adsorption capacity.

The present application relates to the technical field of new materials, in particular to a porous ulinastatin adsorbent with a responsive shell and a preparation method thereof.The porous ulinastatin adsorbent with a responsive shell is a full-synthetic polymer matrix, and has a solid structure.A high-crosslinking-degree polyvinyl alcohol / styrene / divinylbenzene core and a MOF nanoparticle-enhanced framework endow the porous ulinastatin adsorbent with a responsive shell with excellent mechanical strength, and the porous ulinastatin adsorbent with a responsive shell can withstand the pressure in an industrial chromatography column and is not prone to breakage.Because both recognition and desorption are physical processes, the replacement frequency and overall cost of the porous ulinastatin adsorbent with a responsive shell in the production process are greatly reduced, and a reliable guarantee is provided for industrial large-scale and continuous production.

This invention belongs to the field of new biomedical materials and relates to a biomedical hydrogel and a biological tissue imaging method using this hydrogel. The invention first involves using a small monomer of propylene oxyalkyl urea ester to penetrate into the tissue at low temperature. By initiating the homopolymerization of this monomer or copolymerization with a crosslinking agent, a polymer hydrogel is rapidly synthesized in situ within the biological tissue, quickly forming a uniformly embedded tissue sample. The embedded sample exhibits good mechanical properties and anti-swelling properties, is easy to cut, and the hydrogel also has good biocompatibility, resulting in excellent fluorescence retention. This makes it suitable for tissue section imaging applications.

Provided is a fiber material with antibacterial function and a preparation method thereof. Processes of synthesizing an antibacterial agent, dissolving a polymer, uniformly dispersing the antibacterial agent in the polymer and the like are combined into one step, which could be completed in the same one reactor. The in-situ preparation of the antibacterial agent and the dissolution of the polymer could be realized by using the same solvent skillfully, having advantages of saving time and labor.

Branched and crosslinked polymeric fluid loss control agents and methods are provided that have at least one acrylamide-based monomer, at least one sulfonated anionic monomer, and at least one crosslinking monomer. The at least one acrylamide-based monomer and the at least one sulfonated anionic monomer are crosslinked. The branched and crosslinked polymeric fluid loss control agents have between 50 and 99 mol % of the at least one acrylamide-based monomer, between 1 and 30 mol % of the at least one sulfonated anionic monomer, and between 0.1 and 10 mol % of the at least one crosslinking monomer.

The present invention relates to a method for treating a chitin-containing material comprising: (i) milling the chitin-containing material, (ii) contacting the milled chitin-containing material from step (i) with a mixture comprising an aqueous solution of an organic acid, and (iii) contacting the chitin-containing material with an alkaline solution, the alkaline solution comprises water, glycerol and potassium hydroxide with the concentration of 0.2 M to 5M in a ratio of (50-100): (1-50) (v / v); and thereby treating the chitin-containing material. The invention also relates to a chitin formulation, a calcium salt of an organic acid, a protein product or an astaxanthin, which is prepared or can be prepared from a chitin-containing material according to the method of the invention, and to the chitin formulation prepared or can be prepared in the manufacture of natural or synthetic polymers, in agriculture, in packaging, in particular in food packaging. The invention also relates to the use thereof as an ingredient in construction, or in environmental protection, in the preparation of pharmaceuticals, foods or cosmetics, and / or as an immobilized enzyme carrier.

The invention is in the field of secondary batteries. In particular, the present invention is directed to a method of manufacturing an electrode substrate and to an electrode substrate. There is provided a method of manufacturing an electrode substrate, comprising the steps of: i) providing an electrically conductive 3D current collector substrate comprising a plurality of electrically conductive upstanding protrusions, ii) depositing on the 3D current collector substrate a polymer layer having a thickness that progressively increases towards terminal ends of the upstanding protrusions, the step of depositing comprising: iia) exposing a first face of the 3D current collector to one or more organic monomers, one or more initiators, and optionally one or more crosslinkers, iib) applying a temperature gradient to the 3D current collector substrate with an increasing temperature towards terminal ends of the upstanding protrusions, iic) activating the initiator, thereby polymerizing the one or more monomers into a polymer layer.

The present invention relates to a solid synthetic particle (SSP). The SSP may comprise a synthetic polymer, which may form a crosslinked structure. The SSP may have a diameter of 0.2 - 20 µm. A method for producing extracellular vesicles (EVs) by host cells is provided, comprising (a) exposing host cells to a plurality of the SSPs; internalizing the SSPs by the host cells through phagocytosis; and (c) secreting EVs by the host cells. Also provided are host cells comprising the SSPs, and EVs produced by the host cells. Further provided is a method for modulating a biological activity of target cells, for example, immune cells.

The present invention relates to a method of repairing pipe and tank surfaces using a poly fill and coated fabrics. The invention relates to a method of repairing pipe and tank surfaces by applying a poly fill and PTFE coated e-glass fabric patches or wraps to both synthetic polymer and / or non-synthetic polymer pipe and tank surfaces. The method utilizes a synthetic polymer preparation solution to prepare the synthetic polymer surface for the molecular integration, a polymerization catalyst as well as a heating source for activating and accelerating the molecular integration process, and a surface-insensitive bonding agent formulated to react with the pipe or tank surfaces for a more consistent, and reliable molecular integration.

The present invention relates to elastomer materials, and more precisely to an elastomer material blend of at least one polyisoprene polymer and at least one natural or synthetic polymer. The invention also relates to the method for preparing the blend and to the processing thereof by means of an electro-hydrodynamic process or an aero-hydrodynamic process, or to the combination of both processes.

The invention relates to a method for synthesizing polymeric dyes by polymerizing polymerizable monomers bearing polymerizable functional groups (e.g., acrylates, methacrylates, acrylamides or methacrylamides) and chromophore functional groups, in which the polymerization is carried out in a solvent selected from a mixture of methyl ethyl ketone and ethanol or acetonitrile, and the purification of the resulting polymeric dye is carried out with a solvent selected from the group consisting of diisopropyl ether, methyl tert-butyl ether, dimethyl carbonate, ethyl acetate and water. The invention also relates to the resulting polymeric dyes and to ink compositions comprising same. In particular, the following polymeric dyes are disclosed:.

The application provides a crosslinked thermal rearrangement polybenzoxazole hollow fiber gas separation membrane and a preparation method and application thereof, and belongs to the technical field of polymer membrane separation. In the synthesis of the polymer, a phenolphthalein-based diamine monomer with a lactone ring is introduced, so that the phenolphthalein-based diamine monomer is polycondensed with a dianhydride to form a polyimide, and then the polyimide is prepared into a hollow fiber membrane precursor, and then crosslinking is performed at a lower temperature, and then the temperature is further increased to prepare a thermal rearrangement hollow fiber membrane. At this time, the polymer chains are crosslinked, the flowability is hindered, the thickening degree of the skin layer is greatly reduced, and the plasticization resistance is also improved.

Systems and methods for recycling polymers. A method for recycling synthetic polymers by combining the polymers with a solid depolymerizing catalyst in a vessel, mechanically shearing the combined polymers and the solid depolymerizing catalyst against each other to produce monomers from the polymers; and collecting the monomers. The solid depolymerizing catalyst can be solid sodium hydroxide. Collecting the monomers can be achieved by contacting the sheared polymer and catalyst with a recyclable volatile solvent to dissolve the monomers. The method can include purifying the collected monomers for repolymerization. Purifying the monomers can be achieved using nanofiltration membrane technology, cyclic fixed bed adsorption, simulated moving-bed adsorption or a combination thereof.