120 results about "High molecular weight polymer" patented technology

The invention relates to the field of electromagnetic functional composite materials, and particularly discloses a multi-layer composite structure flexible frequency selective surface material and a preparation method thereof. The ultra-high molecular weight polymer fiber-reinforced polymer-based composite material thin-film mechanical enhanced band-pass frequency selection array sequentially comprises an acrylic acid polyvinylidene fluoride organic polymer coating environment-resistant layer, a metal oxide organic film isolation layer, an ultra-high molecular weight polymer fiber-reinforced polymer-based composite material thin-film mechanical enhanced layer, a band-pass frequency selection layer and a packaging protection layer from top to bottom, and the band-pass frequency selection layer is a hexagonal / circular ring nested band-pass frequency selection pattern array. The packaging protection layer is formed by printing a conductive coating composed of conductive filler / polymer resin matrix, and the packaging protection layer is an ink coating. The flexible frequency selective surface material has the characteristics of light weight, high strength, salt fog / rain / ultraviolet and other severe environments, frequency selective wave transmission and multiple functions, has good gas barrier property, is beneficial to maintaining the shape of an inflatable hangar made of a skin and ensuring normal operation of radar equipment, and has good practical engineering application value.

The invention provides a porous bio-based polymer microsphere as well as a preparation method and application thereof. The porous bio-based polymer microsphere provided by the invention comprises a mixture of a bio-based high-molecular polymer P1 and a bio-based block copolymer P2, wherein the bio-based block copolymer P2 is a bio-based block copolymer of which the end-capped group at one end is a hydrophilic group and the end-capped group at the other end is a hydrophobic group. The porous microspheres are prepared by adopting a method of combining condensation phase separation, solvent replacement and solvent volatilization, the obtained microspheres are uniform and stable, the pelletizing rate of the microspheres is nearly high, the yield is high, and subsequent screening is not needed; the process is simple, and the difficulty in operation and control of the process caused by introduction of multiple water phases / oil phases is reduced.

The invention discloses a preparation method and application of a layered column three-dimensional MOF enhanced mixed matrix membrane, and belongs to the technical field of pervaporation membrane separation. The preparation method comprises the following steps: firstly, dissolving a copper metal source and 2, 3, 6, 7, 10, 11-hexahydroxytribenzene in a solvent to obtain Cu < 2 + > and a deprotonated organic ligand, adding a pillar ligand bipyridine in situ, and co-coordinating the double ligand and Cu < 2 + > to generate a layered column three-dimensional MOF (Metal Organic Framework); and doping the layered column three-dimensional MOF into a polymer matrix to prepare a membrane casting solution, and coating the surface of a support body with the membrane casting solution to prepare the layered column three-dimensional MOF enhanced mixed matrix membrane. According to the invention, the pillar ligand dipyridyl provides a supporting effect for the three-dimensional MOF and constructs a three-dimensional pore channel at the same time; the affinity site of the three-dimensional MOF has conjugated pi-pi, hydrophobic and hydrogen bond interaction on the perfume; the three-dimensional MOF and a high-molecular polymer have excellent compatibility, and the mixed matrix membrane simultaneously has affinity of the three-dimensional MOF to 2-PE and hydrophobicity of a polymer matrix; the pervaporation membrane can be used for pervaporation membrane perfume separation.

The invention relates to the technical field of organ transplantation, and discloses organ preserving fluid, application and organ dynamic supercooling perfusion equipment. The organ preserving fluid is prepared from ribose, glucose, mannitol, lidocaine, adenosine, a high-molecular polymer, L-proline, trehalose, inorganic salt and organic salt. The high-molecular polymer comprises one of hydroxyethyl starch, polyethylene glycol and albumin. According to the organ preserving fluid disclosed by the invention, the freezing point of the perfusate is reduced through the micromolecular cryoprotectant, and meanwhile, the micromolecular cryoprotectant and the high-molecular polymer jointly inhibit formation and growth of ice crystals; the problem of liquid preservation at the temperature below zero is solved from the two dimensions of physics (reducing the freezing point and inhibiting ice crystals) and biology (maintaining cell viability), and feasibility is provided for long-time low-temperature transfer and transplantation of organs. The preserving fluid can be used for static preservation or perfusion preservation of various organs such as kidney, liver, heart, pancreas, lung, small intestine, skin and the like.

The invention discloses a formula and application of a long-acting high-molecular polymer dust suppressant, and relates to the field of dust treatment. The long-acting high-molecular polymer dust suppressant comprises the following components: 5%-15% of a composite high-molecular polymer emulsion, 0.5%-3% of an environment-responsive polymer, 0.1%-1.5% of a nano reinforcing material, 0.2%-2% of a bio-based water-retaining agent, 0.05%-0.3% of a crosslinking catalyst and the balance of water. Through the synergistic effect of the composite high-molecular polymer emulsion, the environment-responsive polymer, the nano reinforcing material, the bio-based water-retaining agent and the cross-linking catalyst, a three-layer composite structure is formed, and the environment-friendly dust suppression agent has the advantages of long-acting stable dust suppression, high environmental adaptability, ecological friendliness, restoration function, integration of multiple functions, adaptation to multiple scenes and the like; the defects in the prior art can be effectively overcome.

The present invention provides a multimodal ethylene copolymer composition made of a copolymer of ethylene and at least two α-olefin comonomers having 3 to 10 carbon atoms, wherein the composition comprises at least low and high molecular weight polymer fractions and having specified properties in terms of molecular weight, molecular weight distribution, density, and melt flow properties in terms of MFR2, MFR5, and MFR21, and a film made therefrom, which provides improved mechanical characteristics especially in terms of dart drop impact strength and tensile modulus.

Mechanically and piezoelectrically anisotropic polymer fibers may be formed by spinning a polymer solution or gel that includes a high molecular weight crystallizable polymer and a liquid solvent. The solvent may be configured to interact with the polymer to facilitate chain alignment and, in some examples, create a higher crystalline content within the spun fibers. The polymer solution may also include a low molecular weight additive. The high and low molecular weight polymers may each be characterized by a bimodal molecular weight distribution where the molecular weight of the additive is less than the molecular weight of the crystallizable polymer. The polymer(s) and the additive(s) may be independently selected from vinylidene fluoride, trifluoroethylene, chlorotrifluoroethylene, hexafluoropropene, vinyl fluoride, etc. The spun fibers may be oriented, annealed, poled, and woven or laminated to form a polymer thin film having a high elastic modulus and a high electromechanical coupling factor.

The invention belongs to the technical field of aquaculture tail water treatment, and discloses a marine aquaculture tail water denitrification device based on elemental sulfur conversion and a method thereof. According to the device, agricultural wastes or high-molecular polymers are added into elemental sulfur to form an anaerobic sulfenyl polyculture denitrification system, and the anaerobic sulfenyl polyculture denitrification system is used for bearing filler and water pressure through a bearing layer arranged from the bottom; a sulfur autotrophy and heterotrophy synergistic polyculture denitrification system is formed through a functional layer arranged in the middle, and the pH value in the polyculture denitrification system is maintained; and intercepting the fallen biological membrane and suspended matters through a filter layer arranged at the top. According to the invention, heterotrophic denitrification and sulfur autotrophic denitrification technologies are combined to form a solid-phase sulfur-based polyculture denitrification system, elemental sulfur is converted into polysulfide / sulfide, conversion of sulfur is promoted, biocompatibility is improved, denitrification efficiency is improved, starting time of equipment is shortened, and the problem of carbon source dependence is effectively solved.

To provide a polymer flocculant excellent in flocculation performance, and a method for producing the same.SOLUTION: A polymer flocculant according to the present invention is a water-in-oil emulsion containing a high molecular weight polymer obtained by subjecting a monomer mixture containing the following components (a) to (d) to water-in-oil emulsion polymerization, the components (a) to (d) including: (a) a cationic monomer having a quaternary ammonium salt group; (b) an anionic monomer; (c) a nonionic monomer; and (d) a crosslinkable monomer, where a content of an anionic monomer having a neutralized acid group among the anionic monomers is less than 3 mol% with respect to the whole anionic monomers; a proportion of the nonionic monomer is 20 mol% or less with respect to the whole monomers; and viscosity at 25°C of a 1M sodium chloride aqueous solution containing 0.1 mass% of the water-in-oil emulsion in terms of the polymer is 1.3 to 3.5 mPa s.SELECTED DRAWING: None

Provided herein are compositions including polymeric binder or a salt thereof, high molecular weight polymer, pharmaceutically active agent and a low molecular weight cross-linking agent, methods for using the compositions to coat a substrate, and methods for making the compositions. Alternatively, the composition may include a polymeric binder or a salt thereof, high molecular weight polymer and a pharmaceutically active agent. In particular, the substrate may form part of an apparatus on which it would be beneficial to limit biofouling and / or protein binding.

The invention discloses reflective heat-insulation polymer cement waterproof slurry and a preparation method thereof, and relates to the field of waterproof coatings. The coating comprises a liquid material component and a powder material component, the liquid material component comprises a high-molecular polymer emulsion; the powder component comprises white cement, barium sulfate powder, calcined kaolin and perlite particles; the particle size of the barium sulfate powder is not less than 2000 meshes, and the particle size of the calcined kaolin is not more than 0.5 mu m; the rigid polymer cement-based waterproof slurry is endowed with reflective heat insulation performance, so that the energy-saving level of a building is remarkably improved while the waterproof safety is guaranteed.

To provide a container containing a coagulant for a disaster prevention toilet, which can prevent a polymer powder from coagulating before the coagulant for the disaster prevention toilet is used up. [Solution] A container 100 containing a coagulant for emergency toilets, which can prevent sticking during storage, includes a first flat sheet 110, a second flat sheet 120, a bottom sheet 130, a storage section 140, an easy-open line 150, and a zipper 160. The coagulant 200 for emergency toilets is a powder made by mixing a high molecular weight polymer powder with at least one of silica gel powder and zeolite powder.

To provide a system and a method for reprocessing ultra-high molecular weight polymer film offcuts, the film including a battery separator film.SOLUTION: A system for reprocessing ultra-high molecular weight polymer film offcuts is provided, the system comprising a feed device 202 and a comminution device 203. The feed device is configured to provide an ultra-high molecular weight polymer film offcut to the comminution device. The comminution device comprises at least one cutting screen, the cutting screen comprising a plurality of cutting openings and a plurality of cutting projections. At least one cutting projection spans close to a cutting opening allocated to it. The comminution device is configured to generate relative motion between the cutting screen and the fed film offcut of polymer film in order to comminute the film offcut.SELECTED DRAWING: Figure 2

An electrochemical reactor, which may be a half-cell of a rechargeable battery, comprises a liquid electrolyte which is pumped through the half-cell and has an electrochemical system in which a solid is deposited at an electrode while electric current is flowing. The liquid comprises a high molecular weight polymer or a viscoelastic surfactant enabling elastic turbulence to occur and the half-cell is configured to compel through flow to make changes in direction, so that elastic turbulence occurs, enhancing mass transport through the liquid and reducing overpotential at the electrode, which enhances uniformity of deposited solid and inhibits parasitic reactions.

A production device for melt-blown non-woven fabric, with which a high molecular weight polymer can be reduced in molecular weight by applying a shear force to the high molecular weight polymer without adding an additive such as a peroxide that promotes thermal decomposition reaction, and a low molecular weight polymer can be efficiently produced. The low molecular weight polymer and the melt-blown non-woven fabric are produced using a continuous high shearing device that applies a shear force to the high molecular weight polymer serving as a raw material by rotation of a screw body 37 to reduce the molecular weight of the high molecular weight polymer so as to obtain a low molecular weight polymer, and cools the low molecular weight polymer by passing the low molecular weight polymer through a passage 88 arranged in the axial direction inside the screw body 37.

The present invention discloses the application of an H + / OH — switch-type multifunctional monomer in emulsion polymerization, belonging to the fields of synthesis of multifunctional monomers and application of emulsion polymerization. The present invention synthesizes multifunctional monomers DMAMA and DMAIA. These monomers can exhibit different roles in different pH value systems. By using acid and base solutions with a certain concentration to adjust the H + / OH — content in the emulsion, it is found that at a specific pH value, it is both an emulsifier, a polymerization monomer, and a reducing agent. At this time, the emulsion system is stable, and free radical emulsion polymerization can be carried out at room temperature, and branched polymerization reaction occurs to obtain a high molecular weight polymer. When the H + concentration is less than OH — , the emulsion system is unstable, flocculation occurs, and the polymerization reaction terminates. Demulsification can be achieved without additional addition of a demulsifier. The present invention provides a new method for regulating the stability of the emulsion polymerization system and the preparation of functional polymers.

This invention relates to the field of additive manufacturing, providing a high-strength, low-carbon-residue bicomponent binder, its preparation method, and its application. The bicomponent binder comprises a first component, a second component, a solvent, and a surfactant: the first component is composed of a low molecular weight polymer with a weight-average molecular weight ranging from 2000 to 20000; the second component is composed of a high molecular weight polymer with a weight-average molecular weight ranging from 50000 to 500000. The low molecular weight polymer provides structural support in the initial stage of printing the preform; the high molecular weight polymer is used to improve the strength of the preform and reduce impurity content during heat treatment. This invention significantly improves the mechanical strength of the preform and reduces impurity residue, especially carbon residue, by optimizing the combination and ratio of low and high molecular weight polymers. The final preform exhibits excellent mechanical strength after drying and has extremely low impurity content, greatly improving the quality and performance of additively manufactured products.

This invention relates to pharmaceutical inclusion compounds, their preparation methods, and uses. Specifically, it provides a buggerfuran inclusion compound and its preparation method, wherein the inclusion compound comprises buggerfuran, cyclodextrin compounds, and optionally a high molecular weight polymer. This inclusion compound has a simple composition, high encapsulation efficiency, stability, and high safety, and can be used to prepare various liquid and solid dosage forms.

The invention relates to the technical field of artificial dermis, in particular to a preparation method and application of artificial dermis based on bionic acellular matrix. The artificial dermis comprises a bionic acellular matrix component A and an auxiliary material component B, wherein the component A comprises type I collagen, type VI collagen, elastin, fibronectin, laminin, mother cell protein and glucan; the component B comprises antibacterial peptide, antibiotics and a high-molecular polymer material; the mass ratio of the component A to the component B is (4-6): (1-4). The preparation method comprises the following steps: respectively preparing procedure mother liquor of the component A and the component B, preparing hydrogel with a double-layer gradient structure through step-by-step crosslinking, and then carrying out freeze drying and sterilization treatment. The artificial dermis disclosed by the invention has good biocompatibility and antibacterial property, can effectively promote wound healing, is suitable for repairing acute and chronic wounds of four limbs, faces and trunk parts, and is particularly suitable for repairing complex wounds with exposed bones, tendons, nerves and blood vessels.

The present invention discloses a method for preparing a composite gel electrolyte, as well as its preparation method and application. The method comprises the following steps: preparing a polymer solution: mixing a high molecular weight polymer matrix with an organic solvent, stirring and dissolving the mixture at room temperature to obtain a transparent and uniform polymer solution; preparing a composite gel film: adding a metal alkoxide additive to the polymer solution, stirring the mixture evenly, and then standing the mixture to solidify. After the solvent evaporates, a smooth and flexible polymer film is obtained, and the polymer film is then dried; and preparing a composite gel electrolyte: immersing the polymer film in an electrolyte solution, and obtaining a gel polymer electrolyte after the polymer film swells. The composite gel electrolyte prepared by this method can have excellent ionic conductivity, high energy density, and stability, good compatibility with the positive and negative electrodes of lithium batteries, and can exhibit excellent electrochemical performance when applied to lithium metal batteries.

The invention provides a forming method of a multi-layer composite pipe, which comprises the following steps: forming a composite blank which comprises a molten auxiliary forming layer and low-friction layer powder attached to at least one side of the molten auxiliary forming layer; the low-friction-resistance layer powder is heated, so that a molten-state low-friction-resistance layer is formed on at least one side of the molten-state auxiliary forming layer; the molten-state auxiliary forming layer and the molten-state low-friction-resistance layer are formed into a composite pipe; wherein the friction resistance coefficient M of the low-friction-resistance layer is smaller than that of the outer surface layer of the pipe wall, and the low-friction-resistance layer is made of an ultra-high molecular weight polymer and an antioxidant. The forming efficiency of the pipe can be effectively improved.

The present application discloses a quenching agent and its basic high molecular polymer after heat treatment, wherein the basic high molecular polymer has the following molecular formula: wherein n=1000-3000; m=1000-3000.

The invention relates to a method for improving the storage stability of carbodiimide modified isocyanate. The method comprises the step of adding a fatty acid amide pour point depressant into carbodiimide modified isocyanate, wherein the fatty acid amide pour point depressant is synthesized by using fatty acid and polyethylene polyamine as raw materials. In the low-temperature storage process, on one hand, the added pour point depressant can play a certain solubilizing role, on the other hand, pour point depressant molecules are preferentially separated out to form crystal nucleuses, polar long chains of the pour point depressant can induce high-molecular-weight polymers in modified isocyanate to be separated out around to form crystals with more compact volumes, the specific surface area of the crystals is reduced, and the surface energy is reduced; therefore, the precipitation rate of isocyanate monomer molecules is reduced, and the storage stability of the modified isocyanate is improved.

This application relates to the technical field of oxygen absorber processing, and more specifically, to a manufacturing method and product of a curd-type oxygen absorber. The manufacturing method includes the following steps: (1) mixing a high-molecular-weight polymer powder with purified water, heating in a water bath, and uniformly stirring to obtain an environmentally friendly, translucent colloid; (2) uniformly stirring the environmentally friendly colloid, bentonite, and short fiber to obtain a clay mixture; (3) adding iron powder, activated carbon, and edible salt to the clay mixture and uniformly stirring to obtain mixture A; (4) placing mixture A between two layers of release film and repeatedly rolling until a predetermined thickness is reached, peeling off the top film to obtain a wet sheet; (5) forming the wet sheet into a fixed shape and completely dehydrating it in a hot air process to obtain a dry sheet; and (6) cutting the dry sheet, rewetting it in salt water, and sealing it to obtain a curd-type oxygen absorber. The active ingredients, such as iron powder and activated carbon, are uniformly dispersed in the matrix formed by the high-molecular-weight polymer and bentonite to enhance oxygen scavenging efficiency.

The invention provides a multi-layer composite pipe. The multi-layer composite pipe comprises at least one layer of pipe wall. Wherein at least one layer of pipe wall comprises a pipe wall outer surface layer and a low-friction layer. Wherein the low-friction-resistance layer is located on the side, close to the axis of the pipe, of the pipe wall outer surface layer, the friction resistance coefficient of the low-friction-resistance layer is smaller than that of the pipe wall outer surface layer, and the low-friction-resistance layer is made of an ultra-high molecular weight polymer and an antioxidant. The inner surface of the pipe wall is provided with a material with a low friction coefficient to manufacture the pipeline, so that the friction coefficient of the inner surface of the pipe is reduced, and the possibility of blockage caused by precipitation and accumulation in the pipe is further reduced. The invention further provides a composite pipe system for improving clogging and a method for improving clogging through the composite pipe.

The utility model relates to the technical field of oil-free resin bearings, in particular to a wear-resistant oil-free resin bearing which comprises a bearing body, the bearing body comprises an outer ring, a first groove is formed in the inner wall of the outer ring and facilitates sliding, the first groove is connected with a ball in a rolling mode, and the ball is used for reducing friction and bearing loads. The surfaces of the balls are connected with positioning blocks in a sliding mode, the positioning blocks are used for isolating the balls, the balls are connected with an inner ring in a rolling mode, the inner ring and the rotating shaft rotate together to achieve the supporting effect, a second groove is formed in the outer wall of the inner ring, and a rolling shaft is arranged in the second groove in a sliding mode. The material has excellent wear resistance and high temperature resistance, the ball adopts high molecular weight polymer resin, the material has a self-lubricating property, and additional lubricating oil or lubricating grease is not needed to reduce friction and wear.

Food and beverage products including natural stabilizers, and particularly to replace EDTA, are provided. In particular, the food products comprise oil-in-water emulsions and the natural stabilizers include high molecular weight polymers which are effective to extend the shelf-life of the products.

The utility model relates to a self-locking split type hot press forming mold for an ultra-high molecular weight polymer, and relates to the technical field of molds, the self-locking split type hot press forming mold for the ultra-high molecular weight polymer comprises a lower mold and an upper mold, the lower mold comprises a lower cavity and a lower insert plate, the lower cavity is hollow, and the lower insert plate is arranged in the lower cavity; the upper die is arranged at the upper end of the lower die, the upper die comprises an upper cavity and an upper pressing plate, the upper cavity is hollow and is fixedly matched with the lower cavity in a stepped mode, the upper pressing plate is arranged in the upper cavity, powder is arranged in the upper cavity and the lower cavity in a surrounding mode, and the powder is located between the upper pressing plate and the lower insert plate. The hot-press forming mold is used for solving the problem that when the hot-press pressure of an existing hot-press forming mold for the ultra-high molecular weight polymer is too large, powder is likely to be extruded out, and consequently plates deform.

The application relates to the field of petroleum drilling aids, in particular to a hydrophobic monomer, a high-molecular polymer and a preparation method thereof, and a water-based drilling fluid and application, and provides the hydrophobic monomer with a structural formula shown in formula (I) and a preparation method thereof, on the basis of which a high-molecular polymer and a preparation method thereof are provided, and a water-based drilling fluid and application are provided. The high-molecular polymer provided by the application is used as a high-cutting agent for the water-based drilling fluid, can improve the dynamic cutting force of the drilling fluid while showing a lower tackifying effect, can be used as an ideal flow pattern regulator, has outstanding temperature resistance and salt resistance, has better weather resistance, and is environment-friendly.