8results about How to "High interface activity" patented technology

The application discloses a super-long chain glucose amide nonionic surfactant and a synthesis method thereof. The hydrophobic tail chain of the surfactant is derived from plant-based fatty acids such as oleic acid, erucic acid or nervonic acid, and the hydrophilic head group is derived from glucose derivatives such as meglumine and glycolglucamine. With oleic acid, erucic acid and nervonic acid in rapeseed by-product as hydrophobic tail chain raw material, glucose derivatives meglumine and glycolglucamine as hydrophilic head group raw material, methanol, ethanol, ethylene glycol or propylene glycol (single solvent or binary mixed solvent) as solvent, and DMAP or NaF as catalyst, a kind of bio-based surfactant is obtained. The super-long chain glucose amide nonionic surfactant is prepared by selective amination reaction, the hydroxyl group in the glucose amine molecule does not need to be protected complicatedly, the reaction temperature is close to room temperature, the operation is simple, and the purification process only needs a simple industrial crystallization method, which is suitable for industrial production.

This invention discloses a glycosyl carbon quantum dot oil displacement agent for unconventional oil reservoirs, its preparation method, and its application, belonging to the field of oilfield chemical technology. The preparation of the glycosyl carbon quantum dot oil displacement agent for unconventional oil reservoirs of this invention includes: adding a carbon source and a modifier to an alcohol solution, stirring to dissolve, and then carrying out a hydrothermal reaction to obtain the product; wherein the modifier is a ketoxime modifier; this method is simple, low-cost, has controllable particle size, and high yield, making it suitable for industrial application; the obtained carbon quantum dots have a high specific surface area and functional groups such as carboxyl and hydroxyl groups, which can penetrate nanopores and synergistically reduce the oil-water interfacial tension to below 5.0 mN / m; this product has outstanding high-temperature resistance and penetration ability, and can effectively penetrate into the nanopore throat structure of tight reservoirs, significantly improving oil displacement efficiency through interfacial modification, and is particularly suitable for the exploitation of unconventional nano-oil and gas resources.

The invention belongs to the technical field of chemical cleaning, and particularly relates to an environment-friendly efficient cleaning agent for a membrane material based on an environment-degradable material, which comprises a stimuli-responsive cleavable surfactant, a biogenic polycarboxylic acid chelating system, an environment-induced degradation accelerator, a modified biopolymer membrane layer protective agent and a permeation enhancement cofactor, the controlled extinguishing of interfacial activity is realized by utilizing the acid-induced fracture characteristic of an acetal bond of a surfactant, and active induced degradation is realized through a microcapsule packaging oxidation catalysis system; while efficient decontamination and membrane protection are realized, the medicament degradation period is remarkably shortened, and the foam impact of waste liquid on a biochemical system is thoroughly eliminated.

The application discloses an oil-based water-alcohol-ester multi-element microemulsion fuel additive and a preparation method and application thereof, and belongs to the technical field of fuel additives. The additive is prepared by compounding fuel oil as a continuous phase, a water-alcohol-ester mixture as a dispersed phase, constructing an interface film by using phospholipid, in-situ reaction of oleic acid and diethyldiethanolamine, and combination of high-pressure atomization and magnetic field synergistic stirring according to a specific ratio. The application has excellent stability, a high content of polar components, can significantly reduce nitrogen oxide, hydrocarbon, carbon monoxide and particulate matter emissions, saves oil, protects the engine, improves power, and is suitable for multiple scenes in multiple versions. The white oil version is suitable for field kitchens of troops, and has economic, environmental protection and special application values.

The invention provides a high-temperature-resistant clean fracturing fluid and a preparation method thereof, and belongs to the technical field of fracturing fluids. The cleaning agent is prepared from the following raw materials in parts by weight: 3-5 parts of a high-temperature-resistant gemini surfactant, 0.5-1 part of a cosurfactant, 5-7 parts of a cleanup additive, 1-2 parts of nano granules and 70-80 parts of water. The high-temperature-resistant clean fracturing fluid prepared by the invention has better high-temperature resistance, salt resistance and shear resistance, good sand-carrying effect and excellent viscoelasticity, avoids the damage of a large number of inorganic ions to the change of original properties of a stratum, is simple in preparation process and wide in raw material source, and has a wide application prospect in oil and gas field exploitation and yield increase.

The invention discloses a controllable degradation vinasse protein film as well as a preparation method and application thereof, and belongs to the technical field of biodegradable materials. Modified vinasse protein is added into the vinasse protein film, and the modified vinasse protein is prepared by taking vinasse protein as a raw material, modifying the vinasse protein by catalyzing and grafting C12-C18 aliphatic primary amine through transglutaminase, and compounding the modified vinasse protein with a film-forming matrix, a plasticizer, a reinforcing agent and a cross-linking agent. The degradation period of the film can be controlled and adjusted within 7-180 days by adjusting the enzyme dosage and the primary amine grafting proportion; in addition, the prepared vinasse protein film has good mechanical properties, barrier properties and biodegradability, is suitable for the fields of agriculture, packaging and the like, and has the advantages of environmental protection and resource utilization.

The invention relates to the technical field of surfactants, and provides a zwitterionic surfactant as well as a preparation method and application thereof. The surfactant is shown as a formula (I), wherein in the formula (I), R1 is selected from C4-C30 alkyl; r2 is selected from H and C1-C10 alkyl groups; r3 is selected from H, methyl and ethyl; r4 is selected from H and C1-C4 alkyl; m1 and m2 are respectively and independently selected from any integer between 0 and 50, and m1 + m2 = 1-50; the structure of R5 is shown as-(CH2) n1 (CH (OH)) n2 (CH2) n3SO3 (M) n, n1 is any integer selected from 1-4, n2 is selected from 0 or 1, n3 is any integer selected from 1-4, n1 + n2 + n3 is less than or equal to 6, M comprises at least one of alkali metal ions and alkaline earth metal ions, when M is the alkali metal ions, n is 1, and when M is the alkaline earth metal ions, n is 0.5; xi-is an anion, wherein i is the number of charges of the anion. The zwitterionic surfactant provided by the invention has the advantages of being good in temperature resistance and salt tolerance, high in interfacial activity and capable of effectively reducing the water injection pressure of the low-permeability reservoir, can be used in enhanced oil extraction production for reducing pressure and increasing injection of the low-permeability reservoir, and can obviously improve the recovery efficiency of the low-permeability reservoir.

The application relates to the technical field of oilfield sewage treatment, and particularly discloses a composite water clarifying agent for oilfield sewage treatment and a preparation method thereof. The composite water clarifying agent for oilfield sewage treatment is prepared from the following raw materials: double-modified polyacrylamide, imidazoline quaternary ammonium salt graft copolymer, scale inhibitor, adsorbent, dodecyl dimethyl betaine, coagulant aid and deionized water; the double-modified polyacrylamide is obtained by double modification of 2,3-epoxypropyl trimethyl ammonium chloride and a hydrophobic monomer on polyacrylamide; and the imidazoline quaternary ammonium salt graft copolymer is a graft copolymer of imidazoline quaternary ammonium salt, acrylamide and acrylamide-2-methylpropane sulfonic acid. The composite water clarifying agent can be used for treating high-salt and high-oil sewage generated in the middle and late stages of oilfield exploitation, has the advantages of strong salt resistance, complete demulsification and good flocculation effect, can efficiently remove oil and suspended solids, ensures that the effluent meets the standards, and meets the complex sewage treatment requirements of oilfields.