125 results about "Polyethyleneglycol dimethacrylate" patented technology

The invention provides a preparation method of a semi-interpenetrating network polymer gel electrolyte membrane. The method comprises the following steps: (A) adding a linear polymer and a solvent to a sample bottle, stirring and dissolving the linear polymer and the solvent, adding polyethylene glycol dimethyl acrylic ester, vinylene carbonate and a photoinitiator, and mixing the polyethylene glycol dimethyl acrylic ester, the vinylene carbonate and the photoinitiator evenly to form a solution; (B) coating a glass plate with the solution, covering a layer of glass plate to form a sandwich structure, and curing the sandwich structure to obtain an ultraviolet-cured semi-interpenetrating network polymer membrane; and (C) immersing the ultraviolet-cured semi-interpenetrating network polymer membrane into liquid electrolyte. According to the gel electrolyte provided by the invention, the balance between the ionic conductivity and the mechanical property is relatively well realized; the ionic conductivity at room temperature can be up to 1.49*10<-3>S cm<-1>; the mechanical property is good; the heat stability is good; the electrolyte can be prevented from leaking; the interface stability is good; and a lithium iron phosphate / metal lithium battery assembled by the gel polymer electrolyte membrane has excellent cycle performance and rate performance.

The invention discloses a method for synthesizing hydrogel, one out of N, N-(dimethylamino) ethyl methacrylate or methylacrylic acid polyethylene glycol single methyl ether ester is taken as a monomer, the monomer, an initiator, a cross-linking agent, a catalyst, a complexing agent and a reductant are added according to the molar ratio that monomer: initiator: cross-linking agent: catalyst: complexing agent and reductant is equal to 100-1000: 1: 1-50: 0.05-3: 0.15-9: 1-10, so as to carry out the AGET ATRP reaction and synthesize the hydrogel; wherein the initiator is selected from one out of polyethylene glycol bis (alpha-bromoisobutyrate) ester or 2,6-dibromo dimethyl heptanedioate; the cross-linking agent is one out of ethylene glycol dimethacrylate or poly(ethylene glycol) dimethacrylate; and the catalyst is selected from one out of hexahydrated high ferric chloride or ferric bromide. The method can control the crosslinking degree by regulating the using amount of the cross-linking agent, so that the method can control the mesh size of the hydrogel, control the liquid absorption performance of the hydrogel and obtain the hydrogel with good biocompatibility.

The invention discloses a preparation method of pH responsive cation nanogel. The preparation method comprises the following steps: lauryl sodium sulfate and polyethylene glycol dimethyl acrylic ester are sufficiently dissolved in water to prepare a water-phase solution, ethylene glycol dimethacrylate and cationic monomer methylacrylic acid-(N, N-diethyl amine) ethyl ester or 2-(diisopropyl amino) ethyl methacrylate are uniformly mixed to obtain a mixture, and then the mixture is added into the water-phase solution to prepare microemulsion, and a water solution with an initiator is added in the microemulsion to react for 20-24 h to obtain the pH responsive cation nanogel dispersion liquid. The nanogel prepared has good pH responsiveness and dispersion stability, can be placed stably for more than 3 months, and the number-average grain size of the nanogel is smaller than 100 nm.

The invention provides a pre-crosslinked gel granulate for profile control and polymer flooding as well as a preparation method and application of a pre-crosslinked gel granulate. The pre-crosslinked gel granulate belongs to a reagent for oil exploitation, and is obtained by polymerizing and crosslinking a composite monomer and an instable crosslinking agent under initiation of an initiator so as to obtain body gel, drying and grinding, wherein the composite monomer comprises acrylamide and acrylic acid; and the instable crosslinking agent is selected from polyethylene glycol diacrylate, polyethylene glycol dimethacrylate, polypropylene glycol diacrylate, glycol diacrylate, trimethylolpropane triacrylate, ethoxy trihydroxymethyl triacrylate and the like. The volume of the gel granulate is expanded by absorbing water; after the gel granulates are injected into an oil deposit, big pore canals and ultrahigh pervious layers are plugged in the immediate vicinity of wellbore of an oil layer, so that the injected water enters into a low pervious layer area to start residual oil; after acting for certain time, the gel granulate is automatically hydrolyzed into a solution, so that oil-water mobility control is realized; and the gel granulate has double functions of profile control and polymer flooding, is suitable for the oil deposits of a high water holding period, and can be used for improving the recovery rate of petroleum.

The invention relates to an anti-fog / anti-frost coating based on a cationic polyelectrolyte copolymer, and a preparation method of the anti-fog / anti-frost coating. The anti-fog / anti-frost coating is prepared from 3-50% of poly(dimethylaminoethyl methacrylate-co-fluoroalkyl methacrylate)-b-cationic polyelectrolyte, 0.3-20% of oligo-ethylene glycol dimethacrylate, 0.05-0.5% of photoinitiator and thebalance of solvent. 2-(dimethylamino)ethyl methacrylate, fluoroalkyl methacrylate and methacryloyloxyethyl trimethyl ammonium chloride are used as raw materials; a block polymer is synthesized by using a reversible addition-fragmentation chain transfer polymerization method; polymers of different countra-ions are obtained by means of ion exchange and are taken as main components of the coating; the oligo-ethylene glycol dimethacrylate is used as a crosslinking agent, and a film is formed by cross-linking and solidifying the oligo-ethylene glycol dimethacrylate and a substrate by means of ultraviolet (UV) light. The prepared coating realizes a hydrophilic-hydrophobic balance, has good stability under the premise of guaranteeing excellent anti-fog / anti-frost performance, and realizes anti-fog / anti-frost long-term effect.

The invention discloses a photosensitive resin composition for a photocuring 3D printing high-toughness product and a preparation method of the photosensitive resin composition. The preparation method comprises the following steps: dissolving 5-30% of MBS resin in ethyl acetate / vinyl acetate to prepare an MBS solution, then mixing and adding 20-60% of an acrylic-terminated flexible polyurethane prepolymer, 20-60% of acrylate resin, 5-30% of polyethylene glycol dimethacrylate resin and 20-50% of a reactive diluent, conducting mixing and heating to 30-110 DEG C, conducting stirring and mixing for 0.5-12 hours, removing a solvent in vacuum, and finally, adding 0.1-1.0% of a defoaming agent, 0.1-1.0% of a flatting agent, 0.1-1.0% of an antioxidant and 0.1-5.0% of a photoinitiator, and uniformly conducting stirring and mixing to obtain the photosensitive resin composition for the photocuring 3D printing high-toughness product. The high-toughness photosensitive resin composition for photocuring 3D printing prepared by the invention has the characteristic of high toughness, and also has the characteristics of low viscosity, low shrinkage, high curing speed and the like which accord with a photocuring 3D printing forming process.

A method for shape representation of hydrogel micro-pore arrays comprises the steps that firstly, a selected hydrogel material is polyethylene glycol dimethacrylate and an optical masking method and a template method are adopted for preparing the polyethylene glycol dimethacrylate hydrogel micro-pore arrays with different pore diameters and different pore depths; secondly, a scanning electrochemical microscope probe is prepared and a scanning electrochemical microscope detection system is established; finally, home position representation is conducted on the shape of the polyethylene glycol dimethacrylate hydrogel micro-pore arrays in an aqueous solution through a scanning electrochemical microscope. According to the method, natural oxygen couples in the aqueous solution serve as redox couples, home position representation is conducted on the shape of the polyethylene glycol dimethacrylate hydrogel micro-pore arrays in the aqueous solution through the scanning electrochemical microscope technology, two-dimensional pore diameter and three-dimensional shape information of the surfaces of the hydrogel micro-pore arrays is obtained, and the method has the advantages that home position representation, reversible representation and lossless representation can be conducted on a sample in the aqueous solution and the three-dimensional shape information of the hydrogel material can be obtained.

The invention discloses snowman-shaped Janus particles and a preparation method thereof, belongs to the technical field of Janus particles, and solves the problems of non-strict chemical partition andpoor strength and toughness of a Janus material in the prior art. The snowman-shaped Janus particles are organic / inorganic composite snowman-shaped Janus particles, the hydrophilic ends of the organic / inorganic composite snowman-shaped Janus particles are silicon dioxide, and the hydrophobic ends of the organic / inorganic composite snowman-shaped Janus particles are ethylene glycol dimethacrylate / polybutyl acrylate. The preparation method of the snowman-shaped Janus particles comprises the following steps of: preparing a polybutyl acrylate / polyethylene glycol dimethacrylate seed emulsion; slowly dropwise adding a silane coupling agent monomer emulsion into the polybutyl acrylate / polyethylene glycol dimethacrylate seed emulsion, and carrying out a constant-temperature reaction for 18-24 h;centrifuging to obtain a product, centrifugally washing the product, and freeze-drying the product to obtain the organic / inorganic composite snowman-shaped Janus particles. The snowman-shaped Janus particles are uniform in particle size, high in strength and toughness and good in oil resistance and chemical resistance.

The invention discloses a novel wound dressing used by hospital patients. The novel wound dressing includes an adhesive tape layer, an adhesive layer, a cotton yarn layer and a protective layer. The adhesive layer is located on the upper surface of the adhesive tape layer, and the protective layer is located on the upper surface of the cotton yarn layer. A bamboo fiber layer and a moisture absorption layer are arranged between the adhesive layer and the cotton yarn layer, the bamboo fiber layer is located on the upper surface of the adhesive layer, the moisture absorption layer is located on the upper surface of the bamboo fiber layer, and the moisture absorption layer is located on the lower surface of the cotton yarn layer. The surface of the adhesive layer is covered with 4-vinylbenzoicacid esterified gelatin and methacrylate esterified dextran, and the surface of the moisture absorption layer is covered with methacrylated amylopectin, polyethylene glycol dimethacrylate and acrylamide.

The invention discloses a purification method of 4N-purity nitric oxide gas, and the purification method comprises steps of mixing reaction of dilute sulfuric acid and sodium nitrite, absorption through alkali liquor, gas-liquid separation, drying and separation, and the purification method is characterized in that dried gas forwardly flows through a polyethyleneglycol dimethacrylate adsorption area under the condition with temperature of minus 20DEG to 30DEG C and pressure of 0.5MPa to 1.0MPa; and the adsorbed gas is collected. The polyethyleneglycol dimethacrylate is used as an adsorption agent, so that the disproportionation and oxidization of the nitric oxide can be effectively inhibited, content of impurities such as nitric dioxide and nitrous oxide can be reduced, the purity of the nitric oxide gas is improved, the purity of the purified nitric oxide gas is more than 99.99 percent, the content of the nitric dioxide is smaller than 20ppm, and the content of nitrous oxide is less than 20ppm.