Abstract: Provided are an asphalt-like material and a method and use thereof as a plugging agent, and a water-based drilling fluid. The asphalt-like material has a structure shown in formula I, wherein, in the formula I, R1 is selected from the group consisting of —H, —COOH, and —CH2—COOH; R2 is selected from the group consisting of —NH—CH2—CH2—OH, —NH—CH2—CH2—NH2, —N—(CH2—CH2—OH)2, and —NH—CH2—CH2—CH2—OH; R3 is selected from the group consisting of —OH, —NH—CH2—CH2—OH, —NH—CH2—CH2—NH2, —N—(CH2—CH2—OH)2, and —NH—CH2—CH2—CH2—OH; R4 is selected from the group consisting of —NH—CH2—CH2—OH, —NH—CH2—CH2—NH2, —N—(CH2—CH2—OH)2, and —NH—CH2—CH2—CH2—OH; and n is 370 to 400.

Abstract: The invention relates to a dentin collagen fibril demineralizing material, and a preparation method and application thereof. The invention relates to a conjugate of water-soluble chitosan and an aminocarboxylic acid metal chelating agent used for dental demineralization, preferably dentin demineralization. The invention also discloses a dentin collagen fibril demineralizing material and a preparation method and application thereof, wherein the material is prepared from 0.5-1 part by mass of water-soluble chitosan, 10-30 parts by mass of EDTA, and 0.8-1.5 parts by mass of cross-linking agent. The invention relates to a dental demineralization composition comprising a conjugate and a material of the invention. The conjugate, material and composition can be used for dentin demineralization treatment before dental bonding and restoration.

Abstract: Provided are an asphalt-like material and a method and use thereof as a plugging agent, and a water-based drilling fluid. The asphalt-like material has a structure shown in formula I, wherein, in the formula I, R1 is selected from the group consisting of —H, —COOH, and —CH2—COOH; R2 is selected from the group consisting of —NH—CH2—CH2—OH, —NH—CH2—CH2—NH2, —N—(CH2—CH2—OH)2, and —NH—CH2—CH2—CH2—OH; R3 is selected from the group consisting of —OH, —NH—CH2—CH2—OH, —NH—CH2—CH2—NH2, —N—(CH2—CH2—OH)2, and —NH—CH2—CH2—CH2—OH; R4 is selected from the group consisting of —NH—CH2—CH2—OH, —NH—CH2—CH2—NH2, —N—(CH2—CH2—OH)2, and —NH—CH2—CH2—CH2—OH; and n is 370 to 400.

Abstract: Provided are a quaternary ammonium salt and a preparation method and use thereof as an inhibitor, and a water-based drilling fluid and use thereof. The quaternary ammonium salt has a structure shown in formula I, wherein, in the formula I, R1 is selected from the group consisting of —H and —COOH; R2 is selected from the group consisting of —H and —CH2—COOH; R3 is selected from the group consisting of —NH—CH2—CH2—CH2—NH2, —NH—CH2—CH2—NH2, —NH—CH2—CH2—OH, —O—CH2—CH2—NH2, —N—(CH2—CH2—OH)2, and —O—CH2—CH2—NH—CH2—CH2—OH; and n and m are independently 10 to 15.

Abstract: Provided are a polyaspartic acid derivative and a preparation method and use thereof as a lubricant, and a water-based drilling fluid and use thereof. The polyaspartic acid derivative has a structure shown in formula I, wherein, in the formula I, R1 is selected from the group consisting of —CH2—CH2—CH2—, —CH2—CH2—CH2—CH2—, and —CH2—CH2—CH2—CH2—CH2—CH2—; R2 is selected from the group consisting of —OH, —N—(CH2—CH2—OH)2, —O—CH2—CH2—NH—CH2—CH2—OH, —NH—CH2—CH2—OH, and —O—CH2—CH2—NH2; and n and m are independently 8 to 17.

Abstract: The present application provides an anti-corrosion super-slippery aluminum capillary tube and method and device for preparing the same. The preparation starts with the etching and drying of the inner walls of an aluminum capillary tube, which leads to the formation of an alumina capillary structure surface with micro-nano scale roughness. Next, the alumina capillary structure surface is modified to form a low surface energy modifying layer. Finally, the modified alumina capillary structure surface is wetted by a prewetting solution, so that a continuous film of the prewetting solution is formed on the inner wall of the aluminum capillary tube to function as a lubricating layer. The lubrication layer, on one hand, reduces the flow resistance for convey of liquid media, on the other hand, prevents the conveyed liquids from directly contacting the aluminum capillary tube body, thereby avoiding the corrosion of the aluminum capillary tube by corrosive liquids.

Abstract: The invention relates to a dentin collagen fibril demineralizing material, and a preparation method and application thereof. The invention relates to a conjugate of water-soluble chitosan and an aminocarboxylic acid metal chelating agent used for dental demineralization, preferably dentin demineralization. The invention also discloses a dentin collagen fibril demineralizing material and a preparation method and application thereof, wherein the material is prepared from 0.5-1 part by mass of water-soluble chitosan, 10-30 parts by mass of EDTA, and 0.8-1.5 parts by mass of cross-linking agent. The invention relates to a dental demineralization composition comprising a conjugate and a material of the invention. The conjugate, material and composition can be used for dentin demineralization treatment before dental bonding and restoration.

Abstract: a The invention relates to a dentin collagen fibril demineralizing material, and a preparation method and application thereof. The invention relates to a conjugate of water-soluble chitosan and an aminocarboxylic acid metal chelating agent used for dental demineralization, preferably dentin demineralization. The invention also discloses a dentin collagen fibril demineralizing material and a preparation method and application thereof, wherein the material is prepared from 0.5-1 part by mass of water-soluble chitosan, 10-30 parts by mass of EDTA, and 0.8-1.5 parts by mass of cross-linking agent. The invention relates to a dental demineralization composition comprising a conjugate and a material of the invention. The conjugate, material and composition can be used for dentin demineralization treatment before dental bonding and restoration.