9 results about "Ethyleneglycol dimethacrylate" patented technology

The present application belongs to the technical field of adsorbing materials, and particularly relates to a titanium dioxide molecular imprinting polymer as well as a preparation method and application thereof. The present application uses Sudan red as a template molecule, acrylamide as a functional monomer, ethylene glycol dimethacrylate as a crosslinking agent, and azobisisobutyronitrile as an initiator to construct a cavity structure matching the Sudan red molecule on the surface of the amino-modified titanium dioxide ultrafine particles, and successfully prepares the titanium dioxide molecular imprinting polymer. The material combines the photocatalytic characteristics of the titanium dioxide and the selective recognition ability of the molecular imprinting, can degrade the Sudan red under light, and has a higher photocatalytic efficiency than that of the pure titanium dioxide. The material synthesized through the surface imprinting technology has a three-dimensional cavity complementary to the template molecule, and has a larger adsorption capacity than that of the non-imprinted material. The material realizes the integration of the selective recognition, adsorption and degradation of the Sudan red, and is suitable for complex industrial environments.

This invention relates to an EPDM-based crosslinked rubber material and its preparation method. The rubber material is obtained by vulcanizing raw rubber composed of EPDM rubber, maleic anhydride-grafted polyethylene, a peroxide vulcanizing agent, ethylene glycol dimethacrylate, p-benzoquinone dioxime, lead metal oxide, paraffin oil, a silane coupling agent, and an antioxidant. The EPDM-based crosslinked rubber material obtained by this invention has a double crosslinked structure. The formulation system endows EPDM rubber with excellent physical and mechanical properties, electrical insulation properties, and aging resistance, while also possessing good injection molding performance. This material solves the problems of high prices and long procurement cycles associated with imported finished products, providing an efficient and economical solution for the production of cable accessories.

The present application belongs to the technical field of rectification separation, and provides a rectification separation and purification method for preparing high-purity o-dichlorobenzene. The present application adopts the design of loading surface-modified structured packing in the rectification section of the rectification tower. The structured packing is composed of an alumina ceramic matrix and a cross-linked copolymer layer. The cross-linked copolymer layer contains structural units formed by N-vinyl-2-pyrrolidone, 2-hydroxyethyl methacrylate and ethylene glycol dimethacrylate, and is prepared through a silanization and graft cross-linking polymerization process. The rectification tower is operated under the conditions of a tower top absolute pressure of 0.5-20 kPa and a reflux ratio of 2-6. The present application realizes the efficient separation of o-dichlorobenzene products with a purity of not less than 99.9 wt% from dichlorobenzene isomer mixtures, solves the problem that the structured packing in a low-pressure rectification system cannot simultaneously achieve low pressure drop, large flux and high separation efficiency, and the stability of the surface modification layer in a high-temperature organic vapor environment is insufficient, and has wide industrial application value.

The application discloses a gel polymer electrolyte membrane for lithium batteries and a preparation method and application thereof, and belongs to the polymer electrolyte field. The preparation method provided by the application is that a first prepolymer is obtained by reacting a double-end amino polyethylene glycol with o-phthaldehyde in an inert gas; then tetraethylene glycol dimethyl acrylate and a photoinitiator are added to the first prepolymer to obtain a second prepolymer; a lithium salt is added to the second prepolymer to obtain a precursor slurry; the precursor slurry is subjected to film coating treatment, and the film is subjected to ultraviolet curing treatment and standing treatment in sequence to obtain the gel polymer electrolyte membrane. The dynamic imine bond network is constructed by o-phthaldehyde and the double-end amino polyethylene glycol, the ether oxygen branched chain of the tetraethylene glycol dimethyl acrylate is used to construct a three-dimensional ion transmission channel, and the self-repairing is realized by combining the spontaneous and reversible recombination of the imine bond under the ambient humidity, so that the high ion conductivity of the polymer membrane is ensured to meet the high-frequency charging and discharging requirement.

The application provides an ultrasonic response piezoelectric ionic hydrogel and application thereof, and the hydrogel is formed by cross-linking and solidification of a precursor solution under ultraviolet irradiation; components of the precursor solution include a photosensitive polymer, an ionic polymer, a photoinitiator and a solvent; the photosensitive polymer includes any one or a combination of at least two of polyether F127 diacrylate, polyhydroxyethyl methacrylate, polyethylene glycol dimethyl acrylate, methacrylated gelatin or methacrylated collagen; and the ionic polymer includes any one or a combination of at least two of epsilon-polylysine, polyethyleneimine hydrochloride, polyallylamine hydrochloride, polyquaternary ammonium salt-10 or cationic guar gum. The application uses ultrasonic waves as an external remote driving signal to non-invasively and painlessly activate the piezoelectric ionic effect of the hydrogel, generate detectable periodic voltage and current signals in the hydrogel, and has excellent treatment effect on acne and infected wound repair.

This invention discloses a magnetic molecularly imprinted polymer, its preparation method, and its applications. First, Fe3O4 nanoparticles are prepared via co-precipitation. Then, the Fe3O4 nanoparticles are surface-modified with tetraethyl orthosilicate and 3-(trimethoxysilyl)propyl methacrylate to obtain Fe3O4@SiO2@CH2=CH2 nanoparticles. Using these as the magnetic core of the molecularly imprinted polymer, hexabromocyclododecane is used as the template molecule, 4-vinylpyridine as the functional monomer, azobisisobutyronitrile as the initiator, ethylene glycol dimethacrylate as the crosslinking agent, and acetonitrile as the porogen, to prepare the magnetic molecularly imprinted polymer. The magnetic molecularly imprinted polymer prepared by this invention can rapidly separate hexabromocyclododecane under an external magnetic field with good specificity, exhibiting excellent adsorption and desorption effects. It has low preparation cost, can be recycled, and has good application prospects.

This invention belongs to the field of sealing material technology, specifically relating to an anaerobic sealing liquid and its preparation method and application. The anaerobic sealing liquid comprises the following components by weight: 20-50 parts monomer, 0.5-2 parts initiator, 0.1-1 parts accelerator, and 0.1-1 parts co-accelerator. The monomer includes one or more of polyurethane acrylate, bisphenol A epoxy acrylate, (4) ethylene oxide bisphenol A dimethacrylate, triethylene glycol dimethacrylate, hydroxyethyl methacrylate, and hydroxypropyl methacrylate. Due to the rational formulation of monomers and various additives, the obtained anaerobic sealing liquid has a fast curing rate and excellent airtightness, pull-out resistance, storage stability, and corrosion resistance, meeting the airtightness requirements of pipe connection technology.

This invention discloses an enzyme-catalyzed stabilized teeth whitening and bleaching composite composition and its preparation method, relating to the field of teeth whitening technology. The composition comprises three components: a whitening gel, a catalyst, and a light-cured gingival barrier resin, which synergistically achieve teeth whitening and bleaching. The whitening gel contains hydrogen peroxide, carbomer, propylene glycol, a stabilizer, water, and sodium hydroxide. The catalyst contains propylene glycol, catalase, carbomer, glycerol, sodium hydroxide, sodium benzoate, purified water, and fragrance. The resin contains polyether polyurethane methacrylate, 1,6-hexanediol dimethacrylate, triethylene glycol dimethacrylate, camphorquinone, ethyl p-dimethylaminobenzoate, tert-butylhydroquinone, fumed silica, pigment, fragrance, and MIG-type silica. This invention utilizes enzyme catalysis to achieve natural-looking whitening; the whitening gel is stable during storage and does not easily dilute or release water; the resin cures gently and has a flexible texture; and the process is controllable, making it suitable for industrial production and clinical teeth whitening treatment.

This invention relates to the field of online detection in materials chemistry, specifically an online detection material for 1,2,4-trichlorobenzene and its preparation method. It provides a film-forming sensitive layer material that can be coated onto the surface of a transducer. After drying, it comprises chitosan, a crosslinking component (calculated as 0.1–5 wt% of glutaraldehyde), and magnetic core-shell molecularly imprinted particles. The magnetic core-shell molecularly imprinted particles contain a magnetite magnetic core, a silica intermediate layer, and a molecularly imprinted polymer shell. The shell is a copolymer network of cyclodextrin methacrylate and ethylene glycol dimethacrylate, using 1,2,4-trichlorobenzene as a template. The material maintains membrane integrity and long-term stability while ensuring rapid response under circulation and regeneration conditions, and controls residual 1,2,4-trichlorobenzene to no more than 0.10 wt% and residual glutaraldehyde to no more than 0.5 wt%. This material alleviates structural mass transfer contradictions and the coupling contradiction between processing and coating caused by high filler loading, and has value for online detection applications.