104 results about "Interpenetrating polymer network" patented technology

The invention relates to the technical field of electric wires and cables, and discloses a fluoroplastic insulating high-temperature-resistant fireproof cable and a preparation method thereof.The cable comprises a conductor layer, the conductor layer is formed by twisting multiple strands of copper wires, the periphery of the conductor layer is coated with a fluoroplastic insulating layer, the periphery of the fluoroplastic insulating layer is coated with a shielding layer, and the shielding layer is arranged on the periphery of the conductor layer. The shielding layer is of a copper strip braided structure, the periphery of the shielding layer is coated with an armor layer, the armor layer is braided by stainless steel wires, the periphery of the armor layer is coated with a sheath layer, and the sheath layer comprises the following components in parts by mass: 50-70 parts of functionalized ethylene-tetrafluoroethylene copolymer. According to the invention, an interpenetrating polymer network formed by in-situ crosslinking of the functionalized fluoropolymer and the organosilicon elastomer is constructed in the sheath layer, and an energy field gradient response vulcanization process is adopted, so that the prepared cable sheath maintains the inherent high temperature resistance of fluoroplastic, and the flexibility and mechanical strength of the material are improved at the same time.

The invention relates to the technical field of adhesive tapes, in particular to a convex ball-mounting wafer thinning adhesive tape, a preparation method thereof and a wafer thinning machine, the thinning adhesive tape comprises a base material film, a viscosity-reducing adhesive layer and a release film; the preparation method comprises the following steps: preparing a first polymer network; preparing a second polymer network; the adhesive composition is obtained; forming a liquid film; covering the base material film on a liquid film; covering a release film on the upper surface of the fixed module in the wafer thinning machine; in a wafer thinning machine, the wafer with the base material film is installed on a release film, and heating treatment is carried out on the laminated wafer so as to directly form a solidified thinning adhesive tape on the wafer; by constructing a thermal / optical dual-curing interpenetrating polymer network with a dual visbreaking mechanism and combining with a special preparation method of the thinning adhesive tape in a thinning machine, the probability that a convex ball-mounting wafer generates microcracks or warps in a specific area when the adhesive tape is used for thinning operation is reduced.

The invention relates to the technical field of textile materials, and particularly discloses a fabric capable of improving thermal protection performance and a preparation method and application of the fabric. Nano-scale aluminum oxide; polyethylene glycol diacrylate; a closed type waterborne polyurethane emulsion; a silane coupling agent containing a vinyl group; a photochromic dye; a thermochromic dye; the preparation method comprises the following steps: S1, preparing composite slurry; s2, applying the composite slurry to the surface of a fabric base material in a dot matrix form by adopting a screen printing process to form a coating; s3, the coating is irradiated with ultraviolet light; and S4, carrying out baking treatment on the fabric subjected to the ultraviolet light curing treatment at the temperature of 140-160 DEG C. According to the invention, the polyethylene glycol diacrylate, the closed waterborne polyurethane and the vinyl-containing silane coupling agent are adopted to form an interpenetrating polymer network structure in situ, so that when the obtained fabric is rubbed or washed and the like, the coating is not easy to crack and peel off.

The precise molecular sieving architectures with Janus-like characteristics via an interpenetrating polymer network combining the hydrophilic cPI polymer and hydrophobic microporous covalent organic framework (COF) exhibit super-high permeances for both polar and nonpolar solvents. A unidirectional diffusion and convection process significantly speeds up chemically stable COFs with uniform and tailorable channels growing on polymeric hollow fibre that can efficiently separate organic solvents under ultrafiltration conditions.

The invention discloses a preparation method of a high-transparency TPE (thermoplastic elastomer) peristaltic pump pipe, and belongs to the technical field of high-molecular compounds. The preparation method comprises the following steps: blending high cis-1, 4-polybutadiene and polyethylene-polybutadiene to prepare a matrix phase; the method comprises the following steps: carrying out ester exchange reaction on dimethyl carbonate and polypropylene oxide glycol; then adding ethylene glycol as a chain extender to synthesize a polyurethane phase; carrying out melt blending on the two phases at a specific temperature, and adding dicumyl peroxide to initiate selective crosslinking; and finally, carrying out low-temperature and low-pressure extrusion molding to obtain the high-transparency TPE peristaltic pump pipe. By in-situ formation of an interpenetrating polymer network structure, nanoscale microphase separation is realized, so that the prepared pipe has high transparency, excellent fatigue resistance, excellent wear resistance and good chemical resistance at the same time. The method solves the industrial problem that a traditional peristaltic pump pipe is difficult to meet multiple high-performance requirements, and is suitable for the high-added-value fields such as biological pharmacy and precise instruments.

This invention relates to the field of protective coating technology for ships and marine engineering equipment, specifically to a high interfacial bonding strength gradient bonding layer and its preparation method. The preparation method includes grafting epoxy resin with γ-glycidoxypropyltrimethoxysilane; dissolving the modified epoxy resin, polydimethylsiloxane, and their respective curing agents in an organic solvent to obtain a blended resin precursor; coating the precursor onto the surface of an anti-corrosion paint and curing it to form a film. By controlling the migration rate of the resin components and the curing reaction rate during the curing process, a continuous gradient distribution structure is formed from the coating air interface to the substrate interface, with the concentration of modified epoxy resin continuously increasing and the concentration of polydimethylsiloxane continuously decreasing. This invention, through the synergistic regulation of thermodynamics and kinetics, forms an interpenetrating polymer network structure within the bonding layer, significantly improving the interfacial bonding strength and long-term service stability between the anti-corrosion paint and the antifouling paint.

The invention provides a crosslinked polystyrene product and a preparation method thereof, and belongs to the technical field of high polymer material molding.The preparation method comprises the steps that after raw materials are mixed and degassed, prepolymerization is conducted, the density is measured, the casting amount is calculated according to the total volume of the product, the volume fraction (55%-70%) of a center layer, the density and a shrinkage compensation coefficient, and the product is obtained. Carrying out first forming and second forming; according to the preparation method, prepolymerization and step-by-step forming are combined, polymerization heat release is effectively dispersed, and implosion, bubble and crack risks are remarkably reduced, so that the performance consistency of the product is high, a central layer and a peripheral layer are integrally combined on the molecular level through interface swelling and formation of an interpenetrating polymer network, the layering defect is avoided, and the performance uniformity of the product is improved. And through a casting amount calculation model, accurate control over materials is achieved, and the forming repeatability and the size precision are improved.

The invention relates to the technical field of water-based paint, in particular to water-based industrial anti-rust paint for steel components and a preparation method of the water-based industrial anti-rust paint. The problems that existing water-based industrial anti-rust paint is insufficient in anti-rust performance and weak in mechanical performance are solved. According to the invention, a phosphate group and graphene are simultaneously bonded to an epoxy resin molecular chain to form synergy of chemical anchoring and physical shielding; an organic-inorganic interpenetrating network structure is formed by using a water-based polyamide curing agent modified by an organic silane coupling agent, so that the mechanical property of a coating film is remarkably improved; by introducing the self-crosslinking acrylate emulsion with a core-shell structure, the brittleness problem of a pure epoxy system is avoided, and a formed interpenetrating polymer network structure can further enhance the compactness of a coating film; the functional conductive polymer aqueous dispersion is added and forms active-passive electrochemical synergistic protection with the zinc-aluminum phosphate composite pigment; and the zinc-aluminum phosphate composite pigment and the glass powder are compounded, so that the anti-rust performance is improved.

This invention discloses the application of a self-healing epoxy-acrylate interpenetrating polymer network anti-corrosion coating in a seawater environment, belonging to the technical field of marine anti-corrosion coating materials. The self-healing epoxy-acrylate interpenetrating polymer network anti-corrosion coating includes a coating matrix and hydrophobic self-healing microcapsules uniformly dispersed within the coating matrix. The coating matrix is ​​formed by interpenetrating polymerization of epoxy resin, acrylate, and a curing agent. The hydrophobic self-healing microcapsules have a core-shell structure, including a core and a wall. The core is an oil-based healing agent, and the wall is a hydrophobic polymer material. This invention achieves cross-linking polymerization and curing through the interaction of the oil-based healing agent with dissolved oxygen in the water, without relying on an additional curing agent, greatly reducing the interference of the seawater environment on the curing reaction. The synergistic system of the hydrophobic self-healing microcapsules and the coating matrix constructed in this invention achieves the integration of in-situ self-healing and long-term anti-corrosion in underwater environments.

The application relates to the technical field of electric wire and cable, and discloses a fluoroplastic insulation high-temperature-resistant fireproof cable and a preparation method, the cable comprises a conductor layer, the conductor layer is twisted by multiple copper wires, the conductor layer is coated with a fluoroplastic insulation layer, the fluoroplastic insulation layer is coated with a shielding layer, the shielding layer is a copper-belt woven structure, the shielding layer is coated with an armor layer, the armor layer is woven by stainless steel wires, the armor layer is coated with a sheath layer, and the sheath layer comprises the following components in mass fractions: functionalized ethylene-tetrafluoroethylene copolymer, 50-70 parts by mass. The application constructs an interpenetrating polymer network formed by in-situ crosslinking of a functionalized fluoropolymer and an organic silicon elastomer in the sheath layer, and adopts an energy field gradient response vulcanization process, so that the prepared cable sheath keeps the inherent high-temperature resistance of fluoroplastic, and the flexibility and mechanical strength of the material are improved.

The invention relates to an environment intelligent response type easily-degradable coated controlled-release fertilizer for dry farmland and a preparation method of the easily-degradable coated controlled-release fertilizer. The easily-degradable coated controlled-release fertilizer is prepared by uniformly spraying a layer of controlled-release coating material which is sensitive to temperature and humidity on the surfaces of urea or compound fertilizer particles. The coating material is prepared from a temperature and humidity dual-sensitive composition and an interpenetrating network polymer through an emulsion interfacial polymerization reaction under a heating condition. The temperature and humidity double-sensitive composition is formed by molecular self-assembly of a temperature and humidity low-sensitive organic material and a temperature and humidity high-sensitive organic material; the invention fundamentally solves the problem that the controlled-release fertilizer is difficult to release at low temperature and drought in spring and quick to release at high temperature and high humidity in summer on dry field crops, is more accurate in nutrient supply and demand matching, can realize that the fertilizer is only applied once per plant under the condition of high and stable yield of the dry field crops, and can meet the requirements of simultaneous sowing of seed and fertilizer and lateral deep fertilization; the method has the outstanding advantages of time saving, labor saving, fertilizer saving, easy degradation of the membrane material, environmental friendliness and the like, and has a very wide application prospect.

The application provides a bipolar membrane and a preparation method and application thereof. The bipolar membrane comprises a cation exchange layer, an anion exchange layer and an interface catalytic enhancement layer arranged between the cation exchange layer and the anion exchange layer; the cation exchange layer is a cation exchange membrane containing sulfonic acid groups, the anion exchange layer is an anion exchange membrane containing quaternary ammonium groups; the interface catalytic enhancement layer is an interpenetrating polymer network structure containing Cu-ZIF, the interpenetrating polymer network structure is a crosslinked network of epoxy modified polystyrene and acrylate; the cation exchange layer and the interface catalytic enhancement layer are combined through covalent bonds; the anion exchange layer and the interface catalytic enhancement layer are combined through electrostatic adsorption. In the interface catalytic enhancement layer, the stable loading of the catalyst is realized by using Cu-ZIF, and the firm combination between the bipolar membrane layers is realized by using the interpenetrating polymer network structure.

The invention provides a medical adhesive and a preparation method thereof, the medical adhesive comprises a reagent A, a reagent B and a reagent C, the reagent A is a mixed solution of a water-soluble polyhydroxy polymer and an amino-containing nucleophilic reagent, the reagent C is an aldehyde compound, and the reagent B is an inorganic acid. In the process of preparing the medical adhesive, the reagent A and the reagent C can be subjected to a Schiff base reaction and an acetal reaction sufficiently and highly synchronously, so that an interpenetrating polymer network structure which is stable in structure and consistent in performance is formed, and the physical and chemical consistency and integrity of the medical adhesive are remarkably improved; the gelation time of the ternary system can be accurately controlled by controlling the concentration of the reagent B, the applicability and operation flexibility of the medical adhesive in different clinical scenes are enhanced, the problems of spraying failure, material loss and the like caused by premature curing or delayed forming of the gel in the using process are effectively avoided, and the success rate and effectiveness of intraoperative application are remarkably improved.

This invention discloses a photo / thermal dual-curing bio-based UV ink composition and its preparation method, relating to the field of UV-curable printing materials. It comprises the following raw materials in parts by weight: 100 parts of polypropylene carbonate diol-type polyurethane acrylate oligomer, 5-20 parts of a thermosetting component, 50-150 parts of an reactive diluent, 2-10 parts of a free radical photoinitiator, 0-80 parts of a colorant, and 0-10 parts of other additives; the thermosetting component includes eugenol-furfurylamine type benzoxazine monomer. The UV ink composition obtained by this invention can be heat-treated after photocuring. The polybenzoxazine network is interpenetrated after the formed polyurethane acrylate pre-crosslinked network, forming an interpenetrating or interpenetrating polymer network, and additional crosslinking can occur. This not only improves the strength and flexibility of the ink layer but also effectively enhances solvent resistance and adhesion, resulting in a UV ink composition with excellent overall performance.

The invention relates to a supramolecular semi-interpenetrating polymer network electrolyte and a preparation method and application thereof.The supramolecular semi-interpenetrating polymer network electrolyte is prepared from, by weight, 150-300 parts of polytetrahydrofuran, 150-300 parts of 18-crown ether-6, 40-60 parts of dicyclohexylmethane 4, 4 '-diisocyanate, 2, 2'-(1, 4-phenyl)-bis [4-(4-hydroxybutyl)-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4- The composite material is prepared from the following components in parts by weight: 32 to 48 parts of 1, 2-dioxaborolane], 1 to 1.2 parts of a catalyst, 5.5 to 8.5 parts of an end-capping reagent, 1500 to 2500 parts of 1, 3-dioxolame, 500 to 840 parts of lithium bis (trifluoromethylsulfonyl) imide, 23 to 38 parts of scandium trifluoromethanesulfonate and 15 to 25 parts of a cross-linking agent. According to the invention, a functional thermoplastic polyurethane elastomer-rotaxane is introduced into a polydioxolame matrix to form a supramolecular semi-interpenetrating network structure, so that concentration polarization and growth of lithium dendrites can be inhibited, and the cycling stability is improved.

The invention provides a “host-guest” supramolecular hydrogel. The hydrogel contains an AAm / NVP interpenetrating polymer network (IPN) with supramolecular cross-linkers assembled from β-lactam / adamantane-containing guest molecule with host polymeric cyclodextrin (PCD). An advantage of this hydrogel is that because of the molecular association of polymeric cyclodextrin and adamantane, the supramolecular hydrogels self-heal without any external stimuli after the hydrogels are severed. The invention also provides methods of making the hydrogel, methods of making the synthesis intermediates, and methods of diagnosis or treatment of β-lactamase-containing bacteria.

This invention discloses a 3D printing composition based on the synergistic effect of RAFT and interpenetrating polymer networks, comprising a free radical crosslinking monomer, a diepoxy monomer, a RAFT chain transfer agent, and a cationic photoinitiator. The composition undergoes a synergistic reaction of RAFT polymerization and cationic ring-opening polymerization under light irradiation to form an interpenetrating polymer network structure. This invention selects specific ratios of free radical crosslinking monomer, diepoxy monomer, and RAFT chain transfer agent, and performs a synergistic reaction of RAFT polymerization and cationic ring-opening polymerization under light irradiation to form an interpenetrating polymer network structure, achieving a balance between strength and toughness. It maintains high toughness while maintaining high strength, thus meeting the requirements for both high strength and high toughness.

This invention relates to the field of adhesive technology, specifically to an interface-stabilizing adhesive for silicon anodes and its preparation method. The adhesive comprises curcumin-modified silicon-containing waterborne polyurethane-acrylate, a terpolymer, and a multifunctional monomer, wherein the mass ratio of the curcumin-modified silicon-containing waterborne polyurethane-acrylate, the terpolymer, and the multifunctional monomer is 3-5:1-2:1-1.2. The curcumin-modified silicon-containing waterborne polyurethane-acrylate is synthesized using acrylate and γ-methacryloyloxypropyltrimethoxysilane as modifiers and curcumin as a chain extender via an interpenetrating polymer network method. Through chemical bonding such as grafting and crosslinking, and supramolecular interactions such as hydrogen bonding and coordination, an intelligent network integrating elastic buffering, rigid support, interface passivation, self-healing, and ion conduction is constructed. After cycling, the electrode thickness expansion rate is controlled to <40%, with no macroscopic cracks and high electrode peel strength retention.

This invention discloses a polydicyclopentadiene material, prepared from dicyclopentadiene monomers and phenolic or amine compounds containing norbornene or norbornene structures under the catalysis of a main catalyst and a co-catalyst. The phenolic or amine compounds containing norbornene or norbornene structures not only possess antioxidant capabilities but can also undergo cross-linking reactions with dicyclopentadiene under the action of the dicyclopentadiene ring-opening metathesis polymerization system and the catalyst, forming a fully interpenetrating polymer network with dicyclopentadiene. This simultaneously achieves the purposes of reinforcement, toughening, and anti-aging, resulting in a polydicyclopentadiene material with high strength, toughness, and anti-aging properties, as well as good dielectric properties.

The invention relates to the technical field of gels, in particular to a temperature-sensitive gel for female private part nursing and a preparation method thereof. The invention relates to a pore-foaming agent which is prepared from the following components in parts by mass: 17 to 22 parts of poloxamer 407, 8 to 12 parts of poly N-isopropylacrylamide, 0.5 to 2 parts of carboxymethyl chitosan, 5 to 8 parts of pore-foaming agent, 0.1 to 0.5 part of ionic cross-linking agent and 0.5 to 3 parts of traditional Chinese medicine extract, wherein the poloxamer 407 and the poly (N-isopropylacrylamide) form an interpenetrating polymer network structure, the poloxamer 407 provides basic thermosensitivity, the gel mechanical strength is enhanced by combining the poloxamer 407 with the poly (N-isopropylacrylamide), the low critical solution temperature of the poly (N-isopropylacrylamide) is 32 DEG C, and the low critical solution temperature of the poly (N-isopropylacrylamide) and the gelling temperature (30-34 DEG C) of the poloxamer 407 form complementation; the storage modulus of a mixed system at 35 DEG C breaks through 1500 Pa, and compared with traditional single poloxamer, the mechanical strength is greatly improved.

A micro-magnetic invisible orthodontic appliance is provided. The micro-magnetic invisible orthodontic appliance includes a bottom brace (1), an outer periodontal brace (2) and an inner periodontal brace (3). The bottom brace (1), the outer periodontal brace (2) and the inner periodontal brace (3) together form a U-shaped brace. A tooth receiving groove is defined between the outer periodontal brace (2) and the inner periodontal brace (3). The bottom brace (1), the outer periodontal brace (2) and the inner periodontal brace (3) are made from one of a polymer composite material, biological ceramic, and an interpenetrating polymer network material, dispersed with permanent magnetic neodymium-iron-boron powder, by one-piece molding or three-dimensional printing.

The application relates to the technical field of high polymer composite materials and thermoplastic elastomer modification, and discloses a wear-resistant thermoplastic elastomer and a preparation method thereof. The thermoplastic elastomer is composed of a thermoplastic elastomer matrix and a wear-resistant modification component dispersed in the matrix, the wear-resistant modification component comprises bio-based hyperbranched polysiloxane, nano ceramic particles and short-cut glass fibers; wherein the bio-based hyperbranched polysiloxane forms a semi-interpenetrating polymer network with the matrix, the short-cut glass fibers form a microfiber structure in a melting process, and a reversible dynamic covalent crosslinking structure is further introduced into the matrix, so that the material has certain network reconstruction and self-repairing capacity under the action of friction heat. The application also discloses a corresponding preparation process. The material has low abrasion, low friction coefficient, high tensile strength, high elongation at break and good self-repairing performance, and is suitable for the preparation of products such as wear-resistant sealing parts, wear-resistant conveying components and flexible protection components.

The invention discloses a bacteriostatic and deodorant EVA (Ethylene Vinyl Acetate) foam material and a preparation method thereof, belongs to the technical field of macromolecules, and aims to solve the problems that an antibacterial agent in an existing antibacterial EVA material is easy to separate out and lose efficacy, the mechanical property is reduced due to filler, and common quaternary ammonium salt is not resistant to high-temperature processing. The material comprises an EVA (Ethylene Vinyl Acetate) matrix and an intrinsic antibacterial vinyl elastomer network penetrating through the EVA matrix. An intrinsic antibacterial vinyl elastomer with a double bond and a long-chain alkyl pyridine quaternary ammonium salt side group is used as a core modifier and is chemically crosslinked with an EVA matrix in a mold pressing foaming process to construct an interpenetrating polymer network, and an antibacterial group is permanently locked in the material network. The material has the advantages of long-acting bacteriostasis, excellent rebound resilience and tearing strength, and is especially suitable for manufacturing high-performance antibacterial mould pressing foaming shoe materials.

The application relates to the technical field of vascular closure devices, in particular to a semi-interpenetrating polymer network and a preparation method and application thereof. The semi-interpenetrating polymer network is prepared through photo-crosslinking after blending of functional polyether and polyester; and the semi-interpenetrating polymer network is provided with an adhesion functional group and a photo-crosslinking functional group. The shape memory molecular switch and the adhesion functional group are integrated into one material through an interpenetrating network structure design, the synergy of 3D printing and in-situ crosslinking of the material is realized through photo-crosslinking, the structural stability and shape memory performance of a printing device are improved, and intelligent self-deployment and stable adhesion plugging of the vascular closure device are realized.

Microfibers and nanofibers containing quaternary ammonium polymers and / or interpenetrating polymer networks are provided. For example, a microfiber or nanofiber including a blend, composite, or interpenetrating polymer network is provided. The blend, composite or interpenetrating polymer network can include (i) a polyethyleneimine intermediate, in which the polyethyleneimine intermediate includes a reaction product of reagents including a polyethyleneimine and one or more alkylating agents; at least one of the one or more alkylating agents introduces hydroxyl group functionality or thiol group functionality on the polyethyleneimine intermediate; and nitrogen atoms present in the polyethyleneimine intermediate that are partially or completely quaternized by the one or more alkylating agents; and (ii) a hydroxy-functionalized oligomer, polymer, or copolymer including pendant and / or terminal hydroxy group(s).

The invention discloses a mycelium synthetic material processing technology. The process comprises the following steps: carrying out thermal pretreatment on a wet mycelium substrate; an alkaline activated precursor emulsion containing sodium lignin sulfonate and epoxidized soybean oil is infiltrated into the mycelium matrix by using vacuum pulse; then immersing into an acidic phase transformation locking solution containing metal salt, inducing sodium lignin sulfonate to be separated out in situ in pores of the mycelium matrix by utilizing pH gradient, and finishing coordination locking by utilizing metal ions; and after washing and pre-drying, gradient hot-pressing curing is carried out. Deep filling of modified components is achieved through acid-base phase conversion, residual metal ions serve as Lewis acid to catalyze ring opening polymerization of epoxy bonds, and a metal coordination and covalent crosslinking coexisting interpenetrating polymer network is constructed in the material. The obtained material has high density, high static bending intensity and excellent water-resistant stability, and the problems that a traditional mycelium material is loose in structure and poor in mechanical property are solved.

In examples, the present application discloses an indwelling medical device such as a catheter and other medical devices, which may include a core region and a surface region which may include an interpenetrated polymer network, the interpenetrated polymer network may include a primary polymer network and a secondary polymer network.

Drug delivery systems comprising a floating interpenetrating network (IPN) are provided. The pharmaceutical compositions contain at least one IPN forming system, at least one drug, and at least one gas generating agent, such that upon oral ingestion of the compositions, a floating IPN is formed in situ. These floating IPN provide extended release of the drug entrapped therein for at least about 3 hours.

An example of a flow cell includes a substrate and a resin molded and cured on the substrate. The molded and cured resin has nanodepressions separated by interstitial regions. Each nanodepression has a maximum aperture dimension ranging from approximately 10 nm to approximately 1000 nm. The molded and cured resin also includes an interpenetrating polymer network. This network comprises an epoxy-based polymer and a (meth)acryloyl-based polymer.