452 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 relates to a poly-(2-oxazoline) epoxy derivative and application thereof, and belongs to the technical field of crosslinking. The invention provides a poly-(2-oxazoline) epoxy derivative, which is completely different from existing cross-linking agents such as 1, 4-butanediol diglycidyl ether (BDDE), divinyl sulfone, glycidyl methacrylate and the like in structure, and has the advantages that the structure is simple; the polymer can be used as a cross-linking agent for cross-linking natural high-molecular polymers such as polysaccharide (such as hyaluronic acid) and protein and synthetic high-molecular polymers such as polyethylene glycol and polyvinyl alcohol. Compared with an existing cross-linking agent, the poly-(2-oxazoline) epoxy derivative has the advantages that the poly-(2-oxazoline) epoxy derivative can be easily subjected to a cross-linking reaction with high-molecular polymers such as hyaluronic acid, the prepared cross-linked substances such as sodium hyaluronate gel are more stable and uniform, the performance of the prepared cross-linked substances is easier to regulate and control and the like, and the poly-(2-oxazoline) epoxy derivative has a great application prospect.

The invention relates to the technical field of chemical reaction equipment, in particular to a reaction device for synthesizing high-molecular N-halamine resin, which comprises a viscosity adjusting mechanism, the viscosity adjusting mechanism comprises a detection plate for detecting viscosity, a first permanent magnet is embedded in the detection plate, a second permanent magnet is magnetically adsorbed by the first permanent magnet, and a second permanent magnet is embedded in the second permanent magnet; the top end of the second permanent magnet is provided with a magnetism isolating plate, and the top end of the magnetism isolating plate is fixedly connected with a conducting strip. The viscosity of the resin is fed back by detecting the movement distance of the detection plate, when the viscosity of the resin is increased, the friction force between the resin and the detection plate is also increased, the detection plate moves towards the side away from the connecting spring, and the movement drives the second permanent magnet and the conducting strip to slide on the resistance plate. And through a current monitor in the PLC, the current change of the slide rheostat can be detected, so that the viscosity of the resin is monitored in real time.

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.

It is provided a personal care product comprising two subproducts: a first subproduct which is a freeze-dried solid composition comprising a thickening agent and an humectant; and a second subproduct which is a dried solid film comprising a thickening agent and an humectant; wherein the second subproduct is adapted to contain the first product, thereby acting as a first enveloping element covering the first product, wherein the first product and the second product are adapted to be separately manipulated as two independent products, and each provide a different or equal personal care function by being water-soluble. The personal care product is suitable for cosmetic, oral care, dermatological and pharmaceutical use. Said product can further comprise a second enveloping element comprising a synthetic polymeric film and on the inner part a thickening agent. Furthermore, the present invention is directed to a method to prepare said product.

There is provided a method for improving grease and oil resistance of a moulded fiber based article comprising introducing to a fiber stock a composition comprising a synthetic polymer component and a cationic polymer component and thermoforming the fiber stock. There is also provided a moulded fiber based article and a use of the composition improving grease and oil resistance of a moulded fiber based article. There is also provided a method for preparation of a moulded fiber based article.

The present invention provides an automotive tire containing from 0.1 wt % to 50 wt % hydrophobic nanocellulose. Hydrophobic nanocellulose may include lignin-coated nanocellulose and / or a chemically modified surface to increase hydrophobicity. The nanocellulose may include cellulose nanofibrils and / or cellulose nanocrystals. The nanocellulose may be introduced into tire components such as inner liner, body ply, sidewall, beads, apex, belts, treads, cushion gum, and textile fabric. The nanocellulose may be obtained from a biomass-fractionation process utilizing an acid catalyst, a solvent for lignin, and water to generate a lignin-containing nanocellulose precursor, followed by mechanical treatment of the nanocellulose precursor to produce the nanocellulose. For example, the nanocellulose may be obtained from the AVAP® process. The tire may further include one or more additional components derived from lignocellulosic biomass. For example, the tire may contain lignin-derived carbon black, lignin-derived antioxidants, or biomass-derived silica. The tire may also contain synthetic polymers derived from biomass sugars.

Provided herein are cells, compositions, and methods for identifying enzyme mutants having increased activity in cleaving synthetic polymers. The methods employ high-throughput cell surface display and directed evolution for rapidly assessing millions of enzyme mutants.

The invention relates to the technical field of ecological restoration, in particular to an ecological restoration composite material and a preparation method thereof. Comprising a base material: 30-70 parts of a natural polymer material or a degradable synthetic polymer material; reinforced fibers: 5-40 parts of natural fibers or degradable synthetic fibers; a functional additive: 10-40 parts of at least one of a water-retaining agent, an organic fertilizer, a microbial carrier and a soil conditioner; a plant growth promoter: 1-15 parts of humic acid, a seaweed extract, a trace element fertilizer or an antagonistic antibacterial agent; a binder: 0 to 15 parts of a degradable polymer binder; and 5-15 parts by weight of water. According to the invention, the biodegradability of the material is ensured, the mechanical strength is improved and the overall performance of the composite material is enhanced by optimizing the combination of base materials, pretreating the reinforced fibers, achieving the synergistic effect of the multifunctional additive and efficiently loading the plant growth promoter; the ecological restoration composite material provides long-term support for plant growth.

The present disclosure provides a vitrimer comprising at least two polyolefin backbones, at least one of the at least two polyolefin backbones being connected, at least once, with one other polyolefin backbone of the at least two polyolefin backbones, said connection being via a diester containing bridge. Further provided is a method for obtaining a vitrimer, and a method of polymer compatibilization making use of the vitrimer. Further, provided by the present disclosure is a homogenous polymeric blend comprising at least two synthetic polymers and the disclosed vitrimer, as well as an article of manufacture comprising the vitrimer or the homogenous polymeric blend.

An anti-fog sheet structure includes: a substrate made of polycarbonate, a first synthetic polymer film formed on a first main surface side of the substrate, and a second synthetic polymer film formed on a second main surface side, wherein the first synthetic polymer film has, on its surface, a plurality of first bumps having an equivalent circular area diameter Dp1 in the range of more than 50 nm and less than 500 nm, the second synthetic polymer film has, on its surface, a plurality of second bumps having an equivalent circular area diameter Dp2 in the range of more than 20 nm and less than 500 nm, and the first synthetic polymer film is formed from a cured product of a photocurable resin containing 30 mass % or more of ethoxylated pentaerythritol tetraacrylate.

The invention relates to the field of lithium batteries, in particular to a preparation method of a solid electrolyte for a lithium metal battery, which comprises the following steps: synthesizing a PI polymer; cOF is synthesized; and synthesizing the solid electrolyte: immersing COF in a 1 mol / L LiTFSI acetonitrile solution, washing and then carrying out vacuum drying to obtain an NKCOF compound, dissolving the NKCOF compound, a PI polymer and LiTFSI powder in DMAc, filtering, spreading, evaporating a solvent under a vacuum condition, soaking in methanol, and drying to obtain a finished product. According to the invention, Li < + > / TFSI transmission has structural selective decoupling through homologous imide bond molecule integration ion conduction pathway and polar microenvironment, the long-term problem in the field of lithium metal battery solid electrolyte is solved, and high ionic conductivity, stable interface contact and mechanical strength are realized at room temperature; and the polymer-covalent organic framework solid electrolyte is prepared.

The invention discloses a flame-retardant starch-based biomass composite material and a preparation method thereof. The flame-retardant starch-based biomass composite material comprises starch and N-methylmorpholine-N-oxide, and can also comprise biomass fibers, a biodegradable synthetic polymer, ammonium polyphosphate and pentaerythritol. The mass ratio of the starch to the N-methylmorpholine-N-oxide to the ammonium polyphosphate to the pentaerythritol is (60-75): (20-30): (6-12): (2-5). The preparation method of the flame-retardant starch-based biomass composite material comprises the following steps: firstly, mixing part or all of starch with N-methylmorpholine-N-oxide liquid, and heating to prepare a thermoplastic starch material; and melting, mixing and extruding the thermoplastic starch material, ammonium polyphosphate, pentaerythritol, a reinforcing material and a biodegradable synthetic polymer by adopting a screw extruder. The flame-retardant starch-based biomass composite material disclosed by the invention is completely biodegradable, excellent in mechanical property and flame-retardant property, and the preparation method is simple and convenient.

The invention provides coating-free thermal sublimation ink and a preparation method thereof, the thermal sublimation ink comprises disperse dye color paste, an organic solvent, a surfactant and a water-soluble synthetic polymer, the water-soluble synthetic polymer is polyvinyl alcohol, and the content of the polyvinyl alcohol is 0.1-0.8% by mass; the organic solvent comprises a first organic solvent, the first organic solvent is dihydric alcohol, and the content of the dihydric alcohol is 10-20% by mass; the content ratio of dihydric alcohol to polyvinyl alcohol is (15: 1)-(150: 1). The ink has good transfer printing rate, definition, printing fluency and excellent standby performance.

A method for preparing a 4,4'-dihydroxybiphenyl compound relates to a method for preparing an organic compound. The method uses 2,6-di-tert-butylphenol as a raw material and a new copper complex as a catalyst to efficiently generate 3,3',5,5'-tetra-tert-butylbiphenyl, which is de-tert-butylated to generate 4,4'-dihydroxybiphenyl. 4,4'-dihydroxybiphenyl is an important organic intermediate, often used as a rubber antioxidant and plastic antioxidant, for colorless vulcanized rubber products, rubber products for food packaging and medical latex products, and also for sulfur chloride cold vulcanized products, such as medical gloves. At the same time, it is also a dye intermediate and a stabilizer for petroleum products, such as a stabilizer for synthetic photosensitive materials and lubricating greases. In terms of synthetic polymers, due to its excellent heat resistance, it is often used as a modified monomer for polyesters, polyurethanes, polycarbonates, polysulfones and epoxy resins, etc., to manufacture excellent engineering plastics and composite materials.

A nanobandage solution having Faidherbia albida nanoparticles, olibanum gum, and polyvinyl alcohol and methods of making the nanobandage solution and topically applying the nanobandage to a subject in need thereof are provided.

This disclosure refers to a method for the synthesis of polymers with weight average molecular weights greater than 50,000 g / mol, chemically inert, with a minimum decomposition temperature of 425° C., and a main chain composed only of carbon-carbon bonds, which contain structures of the type of naphthalene, phenanthrene, anthracene, pyrene, carbazole or any other where two or more aromatic rings of six carbon atoms of the benzene-type are fused, which may or may not contain aromatic heterocycles. In addition, the polymers obtained from the present disclosure may or may not contain fluorine atoms in their structure. The synthesis described here is carried out by means of polycondensation between a polycyclic aromatic compound and a compound with a carbonyl group in its structure in a strong acid medium.

The present application provides a synthetic molecule and a method for producing the same, and also provides methods for determining a disease or condition in a subject. The method comprises introducing a synthetic molecule comprising a synthetic polymer and a linker, wherein the linker comprises an organic molecule, a spacer sequence, and a reporter, wherein the reporter is cleaved by an agent present in the environment. Diseases and conditions that can be determined by the method are also described in the present application.

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 present invention relates to a lithium metal negative electrode modified with a polymer on the surface, and the use thereof in an all-solid-state battery. A preparation method for the lithium metal negative electrode comprises: S1, polymer preparation, involving: heating a monomer solution for reaction, so as to form a polymer; and S2, preparation of a polymer-modified lithium negative electrode, involving: dispersing the polymer obtained in step S1 in a solvent to form a polymer dispersion; and coating the surface of metal lithium with the polymer dispersion, and drying same to obtain a lithium metal negative electrode modified with a polymer on the surface. By means of a reaction between the polymer and lithium, an organic / inorganic hybrid SEI film is generated, thereby improving the stability of the lithium negative electrode, and solving the problem of metal lithium dendrites; in addition, the polymer is synthesized by using a one-step solvent method in the present invention, and the preparation method is simple and easy to implement and facilitates large-scale production.

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.

The invention relates to a textile composite, comprising a textile substrate, which comprises a synthetic polymer and cotton, and a composition for enhancing the biodegradability of the textile substrate, wherein the composition is absorbed by the cotton.

A bio-derived wearable film includes an acid-hydrolyzed palm stem pith, a starch, a cellulose, a synthetic polymer, a plant hydrogel, glycerin, and a dye, and a method of producing the bio-derived wearable film. The bio-wearable film has a water absorption of 0.00 to 0.16% measured according to ASTM D570; a carbonate content of 100 to 200 ppm; and shows no cracks when tested according to ASTM D5419.

The invention provides an ordered macroporous carbon-supported bimetallic monatomic catalyst, a preparation method and application, the preparation method comprises the following steps: S1, synthesizing a polymer microsphere template, preparing a first transition metal-organic precursor solution, putting a polystyrene sphere template into the first transition metal-organic precursor solution, and dipping for 2 hours at normal temperature to obtain a product A; s2, carrying out vacuum degassing and suction filtration on the product A, drying the product A in an oven overnight, carrying out vacuum degassing in a solution of ammonia water and methanol in a volume ratio of 1: (0.8-1.2), impregnating the product A at normal temperature for 20-30 hours, carrying out suction filtration to obtain an impregnated template, and drying the impregnated template in the oven overnight to obtain a precursor-filled microsphere template; s3, putting the microsphere template filled with the precursor liquid into a tubular furnace, introducing inert gas, and calcining to obtain a product B; and S4, the product B and a second transition metal precursor liquid are mixed, aged, centrifuged and dried and then placed in a tubular furnace, inert gas is introduced, and calcination is conducted for 2-4 h at the temperature of 600-1000 DEG C.

Hybrid hydrogels for organogenesis support organogenesis from mammalian cells, including human cells. The hybrid hydrogels typically include a network of crosslinked branched synthetic polymers including a branched polyalkylene oxide polymer and a thiolated extracellular matrix polymer, preferably hyaluronic acid. These polymers are crosslinked to adhesion ligand peptides. Also provided are methods of making the hybrid hydrogels and methods of using the hybrid hydrogels for organogenesis.

The invention belongs to the technical field of biomedical materials, and discloses a conductive composite scaffold of a bionic nerve orientation structure and a preparation method of the conductive composite scaffold of the bionic nerve orientation structure, and the conductive composite scaffold of the bionic orientation structure is formed by compounding a structural layer and a functional layer, the structural layer is an oriented nanofiber membrane (made of a natural high-molecular polymer containing amino and a synthetic high-molecular polymer), the functional layer is ionic conductive hydrogel (made of a natural high-molecular polymer containing amino and a natural high-molecular polymer containing carboxyl), and the structural layer and the functional layer are compounded through the action of an amido bond; the amido bond is formed by reacting amino of the oriented nanofiber membrane with carboxyl of the ionic conductive hydrogel under an acidic condition; the preparation method comprises the following steps: compounding the structural layer and the functional layer by using glacial acetic acid by adopting a chemical cross-linking method to prepare the conductive composite nerve scaffold with the bionic orientation structure. According to the invention, electric signal transmission between cells can be realized, and the efficiency of damaged nervous tissue repair is improved.

The invention discloses a composite stent for rotator cuff repair and a preparation method thereof, and belongs to the field of medical instruments. The stent comprises a sheet-shaped composite layer and a strip-shaped composite layer, the sheet-shaped layer is formed by compounding a synthetic polymer woven body with a natural polymer sponge, the strip-shaped layer is formed by compounding a synthetic polymer woven body with a natural sponge containing nano-hydroxyapatite, the sheet-shaped layer and the strip-shaped layer are directly connected through a warp knitting or weft knitting process, and the width ratio is (5: 1)-(10: 1). During preparation, the woven sheet layer and the woven strip layer are soaked in a natural polymer solution and a solution containing nano-hydroxyapatite respectively, and the porous sponge composite is formed through pre-freezing and freeze-drying. According to the scaffold, mechanical strength matching is achieved through weaving connection, bone regeneration is induced in a targeted mode through hydroxyapatite, meanwhile, the porous sponge is matched with soft tissue healing, the problems that a traditional patch is poor in bone tunnel integration and interface stress is concentrated are solved, and the scaffold is suitable for rotator cuff injury repair.

An antimicrobial composition that includes: an antimicrobial component having at least one quaternary ammonium compound; a synthetic polymer that includes: at least one cationic monomer Ab, optionally, at least one anionic monomer Ba, and optionally, at least one non-ionic monomer Ca; an organic acid; at least 20 wt. % of an organic polar solvent, preferably at least 30 wt. % of an organic polar solvent, based on a total weight of the composition; and a surfactant selected from cationic surfactants, amphoteric surfactants and combinations thereof, wherein the composition is free of non-ionic surfactants and the composition has a pH of at least 7. This composition when applied to a surface provides a combination of “quick-kill” efficacy and robust long lasting disinfection.

A continuous loop reinforced food grade belt includes a plurality of extruded filaments comprising a meltable synthetic polymer, and at least one matrix material embedding the filaments. The matrix material includes a food grade polymer, and the matrix material and filaments form a length of belt having opposed first and second ends. The first and second ends are melted together to form a continuous loop belt with no filaments exposed to the belt environment.

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.