6 results about "Methacrylamide" patented technology

The invention belongs to the field of water environment treatment, and particularly relates to a preparation method and application of a hydroxyethyl cellulose modified scale inhibitor capable of effectively inhibiting silicon dioxide scale bodies in a green and efficient manner. The green modified cellulose scale inhibitor is prepared by taking hydroxyethyl cellulose as a raw material, ammonium persulfate as an initiator and N-(3-dimethylaminopropyl) methacrylamide as a grafting monomer through a grafting reaction. According to the method, a grafting chain containing an amide group and a tertiary amine group can be introduced to a cellulose molecular chain, so that scale forming substances can be effectively dispersed, and the efficient environment-friendly scale inhibitor is obtained. The scale inhibitor prepared by the invention can effectively inhibit the generation of scale bodies and prevent the size of the scale bodies from being increased; when the scale inhibitor is applied to a reverse osmosis system, the reduction of membrane flux is effectively relieved, and the membrane has a good application prospect in controlling silicon dioxide scaling on the surface of the reverse osmosis membrane.

The invention provides a weak gelling agent, a preparation method of the weak gelling agent, a cement paste suspension stabilizer and application of the cement paste suspension stabilizer. The weak gelling agent is obtained by initiating reaction of raw materials through an initiator, and the raw materials comprise sodium p-styrenesulfonate, itaconic acid, acrylic acid, N, N '-dimethylacrylamide, N-isopropylacrylamide or N-hydroxymethyl acrylamide and N-vinyl pyrrolidone. The weak gelling agent can relieve the phenomena of dilution and viscosity reduction generated in well cementation construction. The invention further provides a cement paste suspension stabilizer which comprises a tackifying and shear strength improving agent and the weak gelling agent. The invention further provides application of the cement paste suspension stabilizer in well cementation construction at the temperature of 200 DEG C or above. The cement paste suspension stabilizer can ensure the safety of cementing and well cementation construction under high-temperature and ultrahigh-temperature working conditions, and can improve the packing effect and well cementation quality of a deep stratum.

The invention relates to the technical field of biomedical materials, in particular to a block copolymer, organic nano-particles and a preparation method and application of the block copolymer and the organic nano-particles. Preparation monomers of the block copolymer comprise a dopamine methacrylamide monomer and a sulfobetaine methacrylate monomer in a molar ratio of 1: (0.25-4). The organic nanoparticles formed by the block copolymer have low cytotoxicity, excellent biocompatibility, lubricating ability, anti-inflammatory efficacy and anti-aging effect.

The invention belongs to the technical field of optical adhesives, and particularly relates to a hot-melt optical adhesive with an ultraviolet blocking function and a preparation method thereof, and the hot-melt optical adhesive comprises the following components in parts by weight: 100 parts of a mixed copolymer; 1-5 parts of a coupling agent; 0.2-0.6 part of an antioxidant; 0.1-0.6 part of a light stabilizer; 5-10 parts of a water blocking agent; the mixed copolymer is obtained by reacting an ethylene-vinyl acetate copolymer, a cross-linking agent, an anti-ultraviolet agent, an initiator and a polymerization initiator in a weight part ratio of 100: (5-10): (0.5-1): (1-3): (0.5-1); the anti-ultraviolet agent is composed of 4-methacrylamido salicylic acid and thiazolyl-2 (1H)-pyridone-4-methallyl formate, and the thiazolyl-2 (1H)-pyridone-4-methallyl formate is obtained in the mode that citric acid and 2-aminoethanethiol are subjected to a reaction to obtain an intermediate product, and then the intermediate product is subjected to methallyl alcohol esterification to obtain the thiazolyl-2 (1H)-pyridone-4-methallyl formate. According to the optical adhesive, the optical adhesive has a shielding effect on ultraviolet rays with the wavelength of 320-400 nm in sunlight, so that the damage of most ultraviolet rays to the optical cement is reduced, and the service life of the optical cement is prolonged.