7results about How to "Strong hydrogen bonding" patented technology

This invention discloses a modified activated carbon material for oil and gas recovery and its preparation method, specifically relating to the field of oil and gas recovery and adsorption materials. The modified activated carbon material comprises rice husk activated carbon and graphene oxide in a mass ratio of 1 to 4:1. The modified activated carbon material is prepared by microwave irradiation pretreatment of rice husk activated carbon, followed by graphene oxide loading and high-temperature carbonization and reduction. The microwave irradiation power is 400-800W, and the irradiation time is 2-6 minutes. This invention synergistically applies microwave physical activation and graphene oxide nano-loading to the modification of rice husk-based activated carbon. Microwave treatment rapidly creates pores and increases surface functional groups, providing anchoring points for graphene oxide, significantly improving the specific surface area and porosity of the activated carbon. The resulting modified activated carbon exhibits excellent adsorption performance, is low in cost, and is environmentally friendly.

The application discloses a temperature-resistant and salt-resistant filtrate reducer based on phenolic resin and a preparation method thereof, and comprises the following steps: S1, under the condition of an acid catalyst, linear phenolic resin is synthesized by polycondensation with phenol and formaldehyde as raw materials; S2, the linear phenolic resin is subjected to etherification reaction with a bromoalkyl nitrile under the condition of alkalinity; and S3, the phenolic resin after etherification is hydrolyzed into amide phenolic resin under the condition of alkalinity. The drilling fluid additive prepared by the application combines the high-temperature resistance of the phenolic resin and the excellent adsorption and filtrate reduction capacity of the polyacrylamide, solves the problem that the existing phenolic resin needs to be used in combination in the drilling fluid, and simultaneously has excellent effects of high-temperature resistance, salt resistance and filtrate reduction.

The invention relates to the technical field of PET polyester, and discloses an environment-friendly high-thermal-conductivity polyester material and a preparation process thereof.The polyester material comprises, by weight, 100 parts of polyethylene glycol terephthalate, 10-40 parts of hexagonal boron nitride and 0.5-2.5 parts of sodium polyethyleneimine urea carboxylate; polyethyleneimine ureido sodium carboxylate contains a large amount of active amine activity and sodium carboxylate groups, surface modification of boron nitride is effectively achieved, dispersity of boron nitride can be improved, compatibility with PET is better, the polyester material can keep good mechanical property and tensile strength, and the heat conductivity coefficient and heat conduction and heat dissipation performance of the material are improved. Meanwhile, the surface water contact angle of the polyester material is reduced, and the antistatic performance of the polyester material is improved.

The present application relates to the technical field of chemical materials, in particular to an optical transparent adhesive for flexible folding display screen, which is compounded by modified acrylic copolymer, acrylic resin and the like; firstly, the nano-silicon dioxide is treated by KH570 silane coupling agent, the vinyl group is introduced into the silicon dioxide to obtain the vinyl modified silicon dioxide, then the acrylic ester monomer, the vinyl modified silicon dioxide and the vinyl POSS are mixed, and the polymerization reaction is carried out under the action of the initiator, so that the acrylic ester copolymer containing the silicon dioxide and the POSS group chain segment is obtained, and the modified acrylic copolymer with organic-inorganic hybrid network is formed; on the one hand, the silicon dioxide is treated by KH570, which can effectively improve the compatibility of the silicon dioxide in the component, avoid the agglomeration phenomenon of the silicon dioxide during the reaction, make the silicon dioxide reaction more sufficient and complete, and improve the stability and consistency of the adhesive performance.

The application discloses a kind of composite adsorption materials for water environment purification treatment and preparation method thereof, belong to water treatment functional material technical field.The composite adsorption material uses discarded cow hair as matrix, and the surface of matrix is formed by dopamine self-polymerization and co-deposition with metal composite powder to form polydopamine / metal composite powder coating, and polyallyl glycidyl ether is grafted on the coating by surface-initiated atom transfer radical polymerization, and finally, L-arginine or 2,4-diamino butyric acid is used for ring-opening modification.The metal composite powder is mixed by nano TiO2, nano ZrO2 and nano CeO2 in a specific ratio.The material is modified by zwitterion to give pH responsiveness, and can selectively adsorb anionic or cationic dyes under different pH conditions, and after adsorption saturation, the dyes can be eluted and recovered with dilute acid or dilute alkali, and photocatalytic regeneration can be realized by sunlight irradiation.

The invention provides a method for simultaneously extracting rhaponticin, deoxyrhaponticin and anthraquinone compounds from rheum officinale, which can solve the problems of resource waste, high cost, complex process and low recovery rate caused by the fact that rhaponticin, deoxyrhaponticin and anthraquinone compounds cannot be simultaneously obtained by the existing method. The method comprises the following steps: cooking raw materials with boiling water to obtain a first filtrate and residues; adding industrial ammonia water and a first alcohol solution into the residues, stirring, extracting and filtering to obtain a second filtrate, concentrating, refrigerating and filtering to obtain a third filtrate and a first precipitate; modifying macroporous adsorption resin; dissolving the first precipitate with a small-polarity organic solvent, filtering to obtain a fourth filtrate and a second precipitate, concentrating, centrifuging, and combining a clear liquid with the first filtrate and the third filtrate to obtain a mixed liquid; adsorbing the mixed solution with modified macroporous adsorption resin, washing with water, eluting, concentrating and drying to obtain the anthraquinone compound; dissolving the second precipitate, filtering to obtain a fifth filtrate and a third precipitate, and concentrating and crystallizing to obtain a rhaponticin crude product; and refining.

The present invention belongs to the technical field of sodium ion batteries, and in particular to a sodium ion battery negative electrode sheet and a sodium ion battery. The sodium ion battery negative electrode sheet comprises: a negative electrode current collector; a negative electrode active material layer coated on at least one surface of the negative electrode current collector; the negative electrode active material layer comprises the following weight percentage composition: hard carbon 90-96%, conductive agent 1-3%, thickener 1-3%, binder 1-4%, liquid retaining agent 0.1-0.8%; and the hard carbon particle size distribution D50 (μm), tap density A (g / cm 3 ) and specific surface area B(m 2 / g) satisfies the following relationship: 3.0≤D50≤9.0, 0.1<A / B<1. Compared with the prior art, the flexibility, peeling force and liquid retention rate of the negative electrode sheet of the sodium ion battery provided by the present invention are significantly improved, which solves the problem that the cycle performance and safety performance of the electrode sheet are reduced due to the consumption of electrolyte.