350 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.

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.

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.

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 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.

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 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 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.

The invention relates to a pyrolysis system, such as a pyrolysis plant (100), for generating hydrocarbon compounds from a residual polymer product, such as a synthetic polymer, the system comprises5—a densifier (101) configured to receive and heat the residual polymer product, —a degas feeder configured to transfer the residual polymer product from the densifier, and wherein a pH regulating additive, such as Calcium Oxide (CaO), is added to the residual polymer product, —a degasser (102) configured to receive the residual polymer product from the 10 degas feeder, wherein the degasser comprises a degasser conveyor (112), such as a degasser screw conveyor, for moving the residual polymer product to a degasser exit (122a) and a heater for heating the residual polymer product to a temperature within a range from 240 to 280° C., and —a pyrolysis reactor (103) comprising an inlet (123a) configured to receive the 15 residual polymer product from the degasser, wherein the pyrolysis reactor (103) comprises at least one reactor conveyor (113) for moving solid parts of the residual polymer product towards a black carbon outlet (123b) and a heater for heating the residual polymer product to generate pyrolysis vapour, and wherein the pyrolysis reactor comprises a reactor vapour outlet (123c) for release of the 20 pyrolysis vapour comprising the hydrocarbon compounds.

The invention discloses a synthetic polymer waterproof coiled material and a preparation method thereof, and relates to the technical field of waterproof coiled materials, the synthetic polymer waterproof coiled material comprises a synthetic polymer layer, polyester layers are arranged on the upper and lower sides of the synthetic polymer layer, the top of the upper polyester layer is fixedly coated with a waterproof coating, and the bottom of the lower polyester layer is fixedly coated with a primer. Oil film protection paper is fixedly adhered to the bottom of the primer, and the preparation method of the synthetic polymer waterproof roll comprises the following steps: step 1, preparing raw materials; 2, preparing a sizing material; the polyester layers are compounded on the upper side and the lower side of the synthetic polymer layer, so that the tensile property and the stability of the whole coiled material are improved by utilizing the characteristics of the polyester layers, meanwhile, the waterproof coiled material has excellent properties such as moisture resistance, UV resistance and chemical substance resistance, and meanwhile, the waterproof coating is coated on the top of the uppermost polyester layer, so that the waterproof performance of the coiled material is improved. Therefore, the waterproof effect of the coiled material is further optimized, and the waterproof comprehensiveness is improved.

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 belongs to the technical field of sewage treatment, and particularly discloses a sludge deep dehydration conditioner based on a tannic acid graft polymer as well as a synthesis method and industrial application of the sludge deep dehydration conditioner. The conditioner is a novel derivative formed by grafting tannic acid to a main chain of a synthetic polymer or a natural polymer in a chemical bonding mode, the molecular structure of the conditioner comprises high-density cation active sites and three-dimensional net-shaped chelating groups, and the conditioner has the strong current neutralizing capacity and the multi-level adsorption characteristic. The derivative is realized through an oriented synthesis technology for the first time, is innovatively applied to the field of sludge dewatering, can efficiently destroy a sludge extracellular polymer structure, and remarkably improves the bound water release efficiency. According to the conditioner disclosed by the invention, through accurate design of a molecular structure, the sludge dewatering rate is increased by 20% or above while the dosage of a medicament is reduced, and the grafting rate and charge density parameters form core protection characteristics, so that the technical bottleneck of a traditional flocculating agent in deep sludge dewatering is broken through.

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 invention discloses a thermoplastic starch-based biomass composite material, a product and a preparation method. The thermoplastic starch-based biomass composite material or product comprises 70%-84% of a biomass material, 16%-24% of N-methylmorpholine-N-oxide and 0%-8% of urea. The biodegradable plastic also can contain one or more of an inorganic filler, a biomass derived material and a biodegradable synthetic polymer. The biomass material can be one or more of a starch material, a cellulose material, a protein material and a chitin material. The mass ratio of the N-methylmorpholine-N-oxide to the urea is preferably (3: 1)-(1: 1). The thermoplastic starch-based biomass composite material is prepared by thermoplastic melting, mixing and extruding, and a product is prepared by thermoplastic extrusion or thermoplastic injection molding. The thermoplastic starch-based biomass composite material and the product are completely biodegradable, excellent in mechanical property and low in cost, and the preparation method is simple, convenient and feasible.

The present disclosure is directed to nonwoven webs particularly well suited as wiping products that can be constructed without containing synthetic polymer fibers. In one aspect, the webs are made from a blend of cellulose pulp fibers and regenerated cellulose fibers. The nonwoven webs can be formed in a foam forming process in combination with one or more hydroentangling steps.

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 invention relates to a velour needle-punched nonwoven fabric produced by depositing a possibly pre-consolidated nonwoven fabric on a brush-like stitch base and needling the nonwoven fabric onto this base, wherein the nonwoven fabric comprises a spunbonded nonwoven fabric with filaments, wherein the filaments comprise multi-component filaments with at least one high-melting and at least one thermally activatable low-melting component, wherein the melting point of the low-melting component, measured according to DIN ISO 11357-3 (2013), is at least 10 °C below the melting point of the higher-melting component, wherein the velour needle-punched nonwoven fabric contains at least 70 wt.%, based on the total weight of the velour needle-punched nonwoven fabric, of recycled synthetic polymer material.

The present invention belongs to the technical field of patch materials and relates to a double-layer composite patch with a healing and repairing function and a preparation method thereof. The double-layer composite patch is composed of an oriented fiber layer and a random dense layer composited up and down; the components of the oriented fiber layer are synthetic polymers and natural polymers, the synthetic polymer is polylactic acid, poly (L-lactide-caprolactone) or poly (lactic acid-glycolic acid copolymer), and the natural polymer is insoluble type I collagen; during preparation, the oriented fiber membrane obtained by electrospinning is first cut and pre-tensioned and placed in a bidirectional clamping device, and then the bidirectional clamping device is placed in a vacuum oven for annealing treatment, and finally the random dense membrane obtained by electrospinning and the oriented fiber membrane after annealing treatment are composited by ultrasonic welding to obtain the double-layer composite patch. The double-layer composite patch of the present invention has both anti-inflammatory and repair functions while achieving the synergy of "exogenous efficient barrier" and "endogenous precise guidance" functions; the preparation method is simple.