17 results about "Glycol methacrylate" patented technology

The invention discloses an intelligent hydrogel pH sensor based on a fiber bragg grating and a preparation method of the intelligent hydrogel pH sensor, and belongs to the technical field of optical fiber sensing. The preparation method comprises the following steps: by taking acrylic acid as a monomer, hydroxyethyl methylacrylate as a comonomer, ethylene glycol methacrylate as a cross-linking agent and benzoin dimethyl ether as a photoinitiator, mixing citric acid and adding graphene, thereby obtaining the pH value sensitive hydrogel. The pH response sensitivity of the sensor can be greatly improved; meanwhile, by adding citric acid, the number of carboxyl groups is increased, the cross-linking speed is increased and enhanced, and the response range of the sensor to pH is enlarged. The intelligent hydrogel pH sensor adopts a fiber bragg grating sensing method, signal transmission of the intelligent hydrogel pH sensor is an optical signal, the intelligent hydrogel pH sensor is not easily interfered by a surrounding electromagnetic field, and due to the fact that circuit elements do not exist, the working stability can be shown under the special complex environments such as fishing-light complementation and the like.

The invention relates to the technical field of leather chemicals, and discloses an isocyanate modified acrylate polymer fatting agent and a preparation method thereof, and the preparation method comprises the following steps: (1) adding acetoacetoxy methacrylic acid gylcol ester, octadecyl isocyanate and a catalyst into a reaction system, and carrying out reaction treatment; (2) adding a solvent, formaldehyde and N-methyl taurine into a reaction system in the step (1), and carrying out heating reaction; and (3) dropwise adding azodiisobutyronitrile and dodecanethiol into the solution obtained in the step (2) to carry out solution polymerization, after dropwise adding, carrying out heat preservation, and then adding tara gum to obtain a finished product. The polymer fatliquoring agent provided by the invention can more easily permeate into skin collagen, so that the fatliquoring performance is improved, and the polymer fatliquoring agent also has excellent stability and low temperature resistance.

The present invention relates to the field of microscopy, preferably the field of electron microscopy. In particular, the present invention relates to an embedding agent for imaging a biological sample by microscopy, comprising: 60% to 99% by weight of a diol dimethacrylate selected from alkylene glycol dimethacrylate and / or oligo(alkylene glycol) dimethacrylate; 0% to 38% by weight of a polyalkylene glycol diacrylate or polyalkylene glycol methacrylate; the polyalkylene glycol diacrylate or polyalkylene glycol methacrylate is optionally substituted with at least one hydrophilic group, such as a hydroxyl, amino or carbonyl group; at least one additive, preferably comprising at least one heavy metal salt or lanthanide salt; and 0.1% to 2% by weight of a free radical polymerization initiator. The present invention also relates to a conductive material obtained by polymerizing the embedding agent of the present invention, and a preparation method and a kit thereof; the material embedding at least one biological sample. The present invention also relates to a method for imaging a biological sample by microscopy, the method comprising using the embedding agent and / or conductive material of the present invention.

The invention discloses a high-initial-adhesion residue-free adhesive and paper pressure-sensitive adhesive and a manufacturing method thereof, and relates to the field of material chemistry, and the formula of the pressure-sensitive adhesive comprises the following components in parts by mass: 5 parts of a pre-emulsion 374.8, 57.3 parts of acrylic acid, 57.3 parts of EGDMA ethylene glycol dimethacrylate, 0.64 part of mercaptan, 22 parts of ammonium persulfate, 10 parts of polyvinyl alcohol, 3.2 parts of sodium bicarbonate, 6.4 parts of a seeding emulsifier SA-7 and 3.4 parts of tert-butyl. 3.4 parts of sodium hydrogen sulfite, 10-15 parts of organic amine, 13 parts of ammonia water, 18 parts of a wetting agent, 18 parts of a defoaming agent and 4080 parts of deionized water. The paper pressure-sensitive adhesive prepared according to the formula and the preparation method provided by the invention can achieve the effect of no residual adhesive in a high initial adhesion state.

This invention discloses a method for preparing an aqueous thermosensitive Cr(III) ion-imprinted polymer, belonging to the field of water pollution treatment technology. The method includes the following steps: (1) dissolving aminated multi-walled carbon nanotubes and potassium carbonate in N,N-dimethylformamide, and adding bromopropylene to obtain vinylated multi-walled carbon nanotubes; (2) dissolving CrCl3·6H2O, a functional monomer, and a thermosensitive monomer in a porous solvent composed of ethanol and water, adding vinylated multi-walled carbon nanotubes, ethylene glycol dimethacrylate, and azobisisobutyronitrile to obtain the Cr(III) ion-imprinted polymer. This invention introduces the thermosensitive functional monomer N-isopropylacrylamide, enabling the ion-imprinted polymer to respond to changes in ambient temperature and accurately identify and adsorb target ions in complex environments. The introduction of the thermosensitive functional monomer allows the polymer to form a hydrophilic layer, reducing non-specific adsorption caused by impurities such as humic acid, and improving the adsorption capacity and selectivity for target ions.

The invention discloses a preparation method of a pH-responsive core-shell microsphere emulsion. The preparation method comprises the following steps: S1, preparing a polystyrene emulsion; s2, uniformly mixing a spiropyran monomer, butyl acrylate, dimethylaminoethyl methacrylate, ethylene glycol dimethacrylate, an emulsifier and water to form a pre-emulsion; s3, dropwise adding the pre-emulsion into the polystyrene emulsion according to the mass ratio of the polystyrene emulsion to the pre-emulsion of 1: (0.2-0.5), preserving heat at 65 DEG C for 1 hour, preserving heat at 75 DEG C for 1 hour, preserving heat at 85 DEG C for 4 hours, and cooling to room temperature to obtain the core-shell microsphere emulsion. The core-shell microspheres prepared by the preparation method disclosed by the invention are good in washability and have a wider adjustable pH response range.

The invention discloses a multifunctional composite resin disc and a preparation method thereof. The multifunctional composite resin disc comprises an upper soft lining layer, a middle transition layer and a lower hard wear-resistant layer of which the hardness is gradually increased from top to bottom, the upper soft lining layer is composed of a modified acrylate elastomer, and the upper soft lining layer comprises polyethyl methacrylate, ethyl methacrylate, methyl methacrylate, polyester fibers, silica powder and pigment; the middle transition layer comprises polymethyl methacrylate, methyl methacrylate, ethylene glycol dimethacrylate and pigment; the lower hard wear-resistant layer is prepared from polymethyl methacrylate, methyl methacrylate, prepolymerized filler, ethylene glycol dimethacrylate and pigment. The flexible denture is provided with the soft lining layer and has good adaptive capacity in the oral cavity, and a doctor does not need to additionally adopt materials such as silicone rubber to manufacture the soft lining layer, so that the problem of pressing pain or instability when the flexible denture is worn is solved, and meanwhile, the hardness and the wear resistance of the materials can be remarkably improved.

The application discloses an intercalation coal gangue-based surface molecular imprinting adsorption material and a preparation method. First, intercalation coal gangue is used as a carrier, phenol is used as a template molecule, methacrylic acid is used as a functional monomer, ethylene glycol dimethacrylate is used as a crosslinking agent, azobisisobutyronitrile is used as an initiator, a surface molecular imprinting reaction is carried out on the surface of the intercalation coal gangue, and a polymer layer is formed. The layer fixes the template molecule and the functional monomer assembly together. The phenol template molecule is removed by elution, and finally, the intercalation coal gangue-based surface molecular imprinting adsorption material with a structure having a specific adsorption pore size is obtained. The intercalation coal gangue-based surface molecular imprinting adsorption material is prepared by mixing coal gangue as raw material after treatment with a solution of an intercalation agent with a certain concentration. The intercalation process includes direct intercalation of dimethyl sulfoxide, two intercalations of methanol, and macromolecular intercalation of cetyltrimethylammonium bromide, the intercalation process and imprinting effect are optimized, and the specific adsorption of phenol on the phenol adsorption performance is improved.

The present invention discloses a kind of glue for flocking and its preparation method, and relates to the field of adhesives. A kind of glue for flocking is prepared by the following raw materials including parts by weight: 45-65 parts of soft monomers; 6-15 parts of hard monomers; 1.5-3 parts of eleostearic acid; 1-4 parts of cross-linking monomers; 2-4 parts of glycidyl methacrylate; 1-3 parts of methacryloyloxyethyl phosphate; 0.5-2 parts of emulsifiers; 0.5-1 parts of initiators; 0.05-0.2 parts of regulators; 65-120 parts of deionized water; wherein, the cross-linking monomers are selected from one or more of ethylene glycol dimethacrylate, diacetone acrylamide / adipic acid dihydrazide, and the weight ratio of the diacetone acrylamide and the adipic acid dihydrazide is (1.8-2.1): (0.8-1.3). The present application has the effect of taking into account both the flocking fastness and the feel of the flocking product.

The invention relates to the field of glue preparation, in particular to a high-strength glue preparation system and method.The high-strength glue preparation method comprises the following steps that S1, water and polyvinyl alcohol are added into a mixing device, raw materials are made to flow back and forth to be fully stirred and mixed till the polyvinyl alcohol is completely dissolved, and a mixed solution A is obtained; s2, under the stirring condition, adding part of the emulsifier into the mixed solution A, then slowly adding vinyl acetate and an initiator, and continuously stirring to obtain a mixed solution B; s3, after the mixed solution B is cooled, adding sodium bicarbonate, dibutyl phthalate, diethylene glycol dibenzoate, octanol and isopropanol under a stirring condition, and uniformly mixing to obtain a mixed solution C; and S4, adding the residual emulsifier, allyl methacrylate, glycol dimethacrylate and toluene diisocynate into the mixed solution C, uniformly stirring and mixing, preserving heat at 45 DEG C, and cooling to room temperature to obtain the high-strength glue. The mixing device is used for enabling raw materials to flow back and forth to be fully stirred and mixed.

The invention discloses a preparation method and application of a high-molecular emulsifier, acrylamide and nano calcium carbonate are dispersed in a mixed solution of ethylene glycol monomethyl ether and water as a water phase, ethylene glycol dimethacrylate and 2, 4, 6-(trimethylbenzoyl)-diphenyl phosphine oxide are added in toluene as an oil phase, and the high-molecular emulsifier is prepared by a hydrothermal method. Dispersing the water phase and the oil phase in a homogenizer to form Pickering emulsion, polymerizing the emulsion under ultraviolet light, demulsifying, adding acid to remove calcium carbonate, and washing and drying the product to obtain the macromolecular emulsifier. The method has the advantages that the operation method is simple, the reaction condition is mild, the plant essential oil emulsion can be stabilized by using a very small amount of the microsphere emulsifier, and the method has a wide application prospect in the field of polymer emulsifiers.

The invention belongs to the field of molecular sieve preparation, and particularly relates to a preparation method of a strong-adsorption MCM-41 molecular sieve, vinyltrimethoxysilane and ethylene glycol dimethacrylate are used as hydrophobic modifiers, the molecular sieve is subjected to pre-freezing treatment, the temperature difference between the molecular sieve raw material and the hydrophobic modifiers is utilized, and the strong-adsorption MCM-41 molecular sieve is prepared. In addition, after the polymerization reaction is finished, the molecular sieve is washed with ethyl alcohol, on one hand, the hydrogen-bond interaction between hydroxyl groups in the molecular sieve can be destroyed, and the effect of a pore-enlarging agent is achieved; on the other hand, blockage of a polymer formed by self-polymerization of vinyltrimethoxysilane and ethylene glycol dimethacrylate to pore channels of the molecular sieve can be removed, and the strength and adsorption performance of the molecular sieve are improved.

The invention relates to the technical field of resin processing, and discloses macroporous adsorption resin with high cycle stability and a preparation method thereof.The macroporous adsorption resin is prepared from styrene, ethylene glycol dimethacrylate, trimethylolpropane triacrylate, a dispersing agent, a chelating type nanometer material, an initiator, an epoxy compound and a pore-foaming agent; the chelating nano material is prepared by performing surface modification on nano silicon dioxide through a silane coupling agent containing acrylate nitrile guanidine s-triazine, the chelating nano material contains acrylate groups, and the chelating nano material, monomer styrene, cross-linking agent ethylene glycol dimethacrylate and trimethylolpropane triacrylate can be polymerized through a suspension polymerization method, so that the chelating nano material is prepared. Adsorption resin microspheres embedded with inorganic particles are formed, the adsorption resin microspheres can be cross-linked with an epoxy compound, the macroporous adsorption resin is finally obtained through supercritical carbon dioxide treatment, the macroporous adsorption resin has high cycle stability and excellent mechanical strength, and the adsorption rate of copper ions is increased.

The invention discloses a preparation method and application of silicone hydrogel. The invention relates to the technical field of silicon hydrogel, which specifically comprises the following preparation steps: step 1, pouring lauryl sodium sulfate into a sodium chloride solution, and carrying out ultrasonic treatment for 15-25 minutes at room temperature; step 2, adding an organic silicon macromonomer, heating to 35-50 DEG C, and stirring to react for 1.5-2 hours; and 3, adding N-vinyl pyrrolidone, hydroxyethyl methylacrylate, octadecyl acrylate and ethylene glycol dimethacrylate, and uniformly stirring and mixing at room temperature. According to the preparation method and the application process of the silicon hydrogel, the crosslinking density of the silicon hydrogel can be better controlled by adopting the organic silicon macromonomer, and the pore size and distribution of the silicon hydrogel can be accurately changed by adjusting the structure and the dosage of the organic silicon macromonomer in the polymerization process, so that the oxygen permeability of the silicon hydrogel is optimized.

The application relates to the technical field of biological separation engineering, and discloses a recombinant biomimetic affinity ligand for purifying bromelain as well as a preparation method and application of the recombinant biomimetic affinity ligand, which is prepared from the following raw materials in parts by weight: double-bonded silica-coated magnetic microspheres: 100 parts; monomer methyl acrylate: 150-250 parts; epoxy-containing monomer glycidyl methacrylate: 50-100 parts; crosslinking agent ethylene glycol dimethacrylate: 3-6 parts; and biomimetic affinity heptapeptide: 10-20 parts. The biomimetic affinity heptapeptide with a specific amino acid sequence is used as the affinity ligand, the hydrophobic residues and charged side chains in the sequence can specifically bind to the S2 sub-site and surrounding residues of the active center of bromelain to realize cavity complementation, high-specificity recognition of the target enzyme is realized, and the affinity medium prepared by using the ligand can effectively eliminate the interference of homologous impure proteins which are highly similar in structure and physicochemical properties.

The present invention relates to ocular compositions for the controlled release of a therapeutic agent. The ocular composition comprises at least 20% w / w of a therapeutic agent; 5 to 75% w / w of a photopolymerizable composition selected from the group consisting of fragments or monomers of polyalkylene glycol mono-acrylate, polyalkylene glycol diacrylate, polyalkylene glycol methacrylate and polyalkylene glycol dimethacrylate, and mixtures, copolymers, and block copolymers thereof; 0.1 to 40% w / w of a biodegradable polymer selected from the group consisting of lactide / glycolide copolymer (including poly(lactide-co-glycolide) (PLGA)), poly (L-lactide) (PLA), polyhydroxyalkanoates, including polyhydroxybutyrate, polyglycolic acid (PGA), polycaprolactone (PCL), poly (DL-lactide) (PDL), poly (D-lactide), lactide / caprolactone copolymer, poly-L-lactide-co-caprolactone (PLC) and mixtures, copolymers, and block copolymers thereof; and a photoinitiator.

The invention relates to the technical field of leather finishing agents, and discloses an acrylate polymer leather waterproof finishing agent and a preparation method thereof, and the preparation method comprises the following steps: (1) adding acetoacetoxy methacrylic acid gylcol ester, octadecyl isocyanate and a catalyst into a reaction system, and carrying out reaction treatment; (2) adding deionized water and an emulsifier into the reaction system in the step (1), and emulsifying to obtain an emulsion; (3) taking part of the emulsion in the step (2), dropwise adding an initiator, then adding the rest emulsion, and carrying out heat preservation treatment; and (4) adding adipic acid dihydrazide into the product obtained in the step (3), and reacting to obtain a finished product. The finishing agent provided by the invention has the advantages of good permeability, good wear resistance, good bonding strength with leather, and no pollution in the preparation method.