8results about How to "Adjustable viscosity" patented technology

This invention provides a method for preparing an emulsion-gel fracturing fluid and a solid proppant, as well as their applications. The method for preparing the emulsion-gel fracturing fluid includes: uniformly mixing epoxy resin, diluent, emulsifier, pH adjuster, and defoamer to obtain a mixture; adding water to the mixture while stirring to obtain an oil-in-water emulsion; adding a curing agent to the emulsion; heating and stirring; allowing sedimentation; ensuring the epoxy resin and curing agent are fully mixed and initially cured; then adding gel for crosslinking to obtain the emulsion-gel fracturing fluid; or adding a curing agent to the emulsion; stirring thoroughly; adding gels of different concentrations; stirring; and crosslinking to obtain the emulsion-gel fracturing fluid. The emulsion-gel fracturing fluid is heated to a curing temperature to generate a proppant. The emulsion-gel fracturing fluid of this invention has adjustable viscosity, low filtration loss, and can generate a solid proppant in situ under formation conditions, making it suitable for oil and gas field development. The generated proppant has high mechanical strength, good conductivity, and adjustable particle size.

The application relates to the adhesive technical field and discloses a sisal polishing wheel setting adhesive and a preparation method thereof, wherein the sisal polishing wheel setting adhesive is prepared by compounding a specific formula of vinyl-acrylic emulsion, silica sol, ethylene-vinyl acetate copolymer emulsion and a thickening agent; the vinyl-acrylic emulsion is prepared by deionized water, vinyl acetate, butyl acrylate, methyl methacrylate, acrylic acid, a functional monomer, a composite emulsifier and an oxidation-reduction initiation system through a specific pre-emulsification-step-by-step dropping process. The functional monomer is introduced to participate in copolymerization, a chemical bridge between a polymer and sisal fibers is constructed, the composite silica sol forms a Si-O-Si inorganic network and produces strong hydrogen bond action with the organic polymer chain, the VAE emulsion is added to improve the flexibility of the adhesive film and the wettability of the plant fibers, the three are synergistic, a stable interpenetrating network structure is formed, and the technical problems that the traditional setting adhesive is poor in temperature resistance, insufficient in wear resistance, difficult to consider environmental protection and performance at the same time are solved.

The utility model discloses a viscosity-adjustable cream stirring device which comprises a cream stirring barrel movably installed on the inner side of a supporting frame, a stirring motor is arranged at the top of the cream stirring barrel, an output shaft of the stirring motor is fixedly connected with a stirring shaft, and the bottom end of the stirring shaft rotationally penetrates into the cream stirring barrel and is fixedly connected with a scattering head. Stirring paddles are fixedly connected to two sides of the stirring shaft; an adjusting bin is fixedly mounted on the left side of the top of the cream stirring barrel, and corn starch is stored in the adjusting bin. According to the utility model, not only is the viscosity of cream convenient to adjust, but also the cream material can be fully and uniformly stirred and processed by utilizing the matching of up-down vibration and rotary stirring of the cream material, particularly, the dispersion effect on the powder material is better, the phenomena of starch caking and insufficient colloid dissolution in the prior art are avoided, and the production efficiency is improved. Therefore, the cream viscosity distribution is more uniform, and the overall stirring and using effects are better.

This application provides a tubing thread sealant for shallow coalbed methane wells, its preparation method, and its application, belonging to the field of oilfield development. The tubing thread sealant comprises: component A, component B, and component C; wherein, by weight, component A includes the following chemical components: 41-61 parts of polymer matrix, 15-23 parts of 5-methylthio-7-fluoro-1H-indene, and 23-37 parts of excipients; component B includes the following chemical components by weight: 80-90 parts of epoxy curing agent and 10-25 parts of epoxy curing accelerator; and component C is an additive. In component A, a polymer matrix is ​​used as the matrix. By introducing molecularly designed active substances containing fluorine and sulfur elements, such as 5-methylthio-7-fluoro-1H-indene, the material combines the weather resistance and toughness of rubber while maintaining stable performance at high temperatures, making it less prone to deformation or failure.

The application discloses a synthesis method of polyether polyol and belongs to the technical field of chemical synthesis of fine chemicals. The method comprises the following steps: mixing 4-n-hexyl resorcinol and a small-molecule alcohol compound, adding an inorganic alkali catalyst to perform reaction, and then performing vacuum distillation treatment; a mixture of propylene oxide and ethylene oxide is added to the system to perform reaction; after the reaction is completed, propylene oxide is introduced to perform reaction, and then ethylene oxide is introduced to perform reaction; after the reaction is completed, an acid is added to adjust the pH value, and then filtration and vacuum distillation treatment are performed to obtain the polyether polyol. The synthesis of the 4-n-hexyl resorcinol-based special polyether polyol is realized under mild conditions, the viscosity, the hydroxyl value, the average molecular weight and the HLB value can be controlled, the polyether polyol can replace the use of environmental hormone chemical substances such as nonyl phenol and octyl phenol polyoxyethylene ether, and the polyether polyol has remarkable environmental protection and application values.

The application provides an edible enzyme cross-linking color drawing coating, a preparation method and application, and belongs to the technical field of food packaging materials, and comprises the following components in percentage by weight: 4-10% of edible connecting material, 0.1-3% of biological cross-linking enzyme, 1-6% of microcapsule natural pigment, 1-5% of enzyme activity aid, 0.1-1% of rheological modifier, 1-5% of plasticizer, and the rest is solvent; the biological cross-linking enzyme comprises one or more combinations of glutamine transaminase, laccase, tyrosinase, polyphenol oxidase, peroxidase and lysine oxidase. The biological cross-linking enzyme is used to catalyze the connecting material and the casing substrate to form a covalent bond, so that the defects of weak adhesion and easy peeling of the traditional physical adsorption type coating are fundamentally overcome, the coating is non-toxic and non-residual, conforms to the clean label trend, realizes the perfect combination of food safety and excellent processing performance, and has high industrialization value.

The utility model discloses an artificial lower limb capable of intelligently adjusting damping based on an IMU (Inertial Measurement Unit) and magnetorheological fluid. Comprising a stump mounting sleeve, an artificial thigh part, a knee rotary magnetorheological fluid damper, an artificial shank part, a leg telescopic magnetorheological fluid damper, an ankle rotary magnetorheological fluid damper, an artificial foot part, a foot telescopic magnetorheological fluid damper, an inertia measurement sensor, a first pressure sensor, a second pressure sensor and a damping controller, the stump mounting sleeve is arranged at the upper end of the thigh artificial limb part and used for being connected with a thigh amputation part, and the bottom end of the thigh artificial limb part is rotationally connected with the shank artificial limb part through the knee rotary magnetorheological fluid damper; the bottom end of the lower leg artificial limb part is connected with the artificial foot part through the ankle rotary magnetorheological fluid damper, a gravity center cavity is formed in the gravity center position of the whole artificial lower limb, and the inertia measurement sensor is installed in the gravity center cavity.

In order to improve the AMOLED display quality, the application solves the residual image problem by using a polyimide material. The application discloses a polyimide precursor prepared from diamine monomers and dianhydride monomers. The application introduces 0.1-6 mol% fluorine-containing diamine monomers into the diamine monomers and 0-4 mol% fluorine-containing dianhydride monomers into the dianhydride monomers to reduce the dielectric constant of the polyimide precursor after curing. Meanwhile, the application discloses a preparation method of the polyimide precursor. The method controls the water content of the reaction system to perform high-temperature hydrolysis reaction, so as to control the proportion of the amine group as the end and the carboxyl group as the end, thereby achieving the effect of adjusting the viscosity of the polyimide precursor slurry. In the case of combining the fluorine-containing reaction raw materials and the high-temperature hydrolysis reaction, the viscosity of the polyimide precursor slurry is more controllable, the dielectric constant of the polyimide film is lower, and the expansion coefficient is smaller, thereby achieving a better effect of improving the residual image.