8 results about "Glycol methacrylate" patented technology

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 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 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 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.