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408results about How to "Good elasticity" patented technology

High-temperature-resistant polymer thickening agent for oil field fracturing fluid as well as preparation method and application of thickening agent

ActiveCN104449643AGood elasticityStrong ability to carry sandDrilling compositionSalt resistanceCarrying capacity
The invention discloses a high-temperature-resistant polymer thickening agent for an oil field fracturing fluid as well as a preparation method and application of the thickening agent. The preparation method of the thickening agent comprises the following step: polymerizing acrylamide, other olefin monomers, an initiating agent and a chain transfer agent in an aqueous solution by virtue of a solution process, wherein the weight ratio of acrylamide to the other olefin monomers to water is (10-20):(6-18):(62-84); and the other olefin monomers are selected from one or more, preferably two or three, of anionic olefin monomers, cationic olefin monomers or non-ionic olefin monomers. According to the high-temperature-resistant polymer thickening agent disclosed by the invention, free radicals are generated by using an aqueous solution catalyst process so as to ensure that the monomers are subjected to ternary polymerization or quaternary polymerization to form the anionic high molecular polyacrylamide polymer with the molecular weight of 4,000,000-8,500,000. After the thickening agent is crosslinked with a crosslinking agent, the thickening agent can be used for tolerating high temperature of more than 210 DEG C, and has the advantages of good crosslinked gel elasticity, strong sand carrying capacity, anti-shearing performance, salt resistance, no residues and the like.
Owner:PETROCHINA CO LTD

Production method for PTT (Poly Trimethylene terephthalate)/PET (Poly Ethylene Terephthalate) side-by-side composite elastic short fibers

The invention discloses a production method for PTT (Poly Trimethylene terephthalate)/PET (Poly Ethylene Terephthalate) side-by-side composite elastic short fibers. The production method comprises the following steps of (1) compositing a raw material a, namely, modified PET and a material b, namely, PTT in a large-capacity two-channel composite spinning assembly after respectively passing through crystallizing and drying equipment, melting and extruding equipment and a spinning manifold, obtaining a strand with a side-by-side shape, and then obtaining a PTT/PET side-by-side composite elastic short fiber precursor c after spinning, circular blowing cooling, oiling, rolling and falling into a barrel; (2) feeding the precursor c into a packaging machine for packaging after bundling, drafting, oiling, tension heat setting, oiling, mechanical rolling, relaxation heat setting and cutting. According to the production method disclosed by the invention, since the special composite spinning manifold, the large-capacity two-channel composite spinning assembly and a multi-roller tension heat setting instrument device are adopted, the PTT/PET side-by-side composite elastic short fiber prepared by the production method has moderate elasticity, excellent hand feeling and good stretch elastic recovery.
Owner:福建省海兴凯晟科技有限公司

Molybdenum disulfide-graphene aerogel electrode material preparation method

InactiveCN107394127AGood elasticityGood thermal and electrical conductivityCell electrodesSecondary cellsPolytetrafluoroethyleneMegasonic cleaning
The invention discloses a molybdenum disulfide-graphene aerogel electrode material preparation method. The preparation method is specifically implemented according to the following steps: step one, adding molybdenum trioxide and graphene oxide into a certain amount of distilled water, and ultrasonically dispersing by using an ultrasonic cleaner and uniformly mixing the molybdenum trioxide and graphene oxide and the distilled water to obtain an intermediate solution; step two, adding the sulfur source in the intermediate solution obtained through the step one, stirring to uniform mixing to obtain the mixed solution; step three, transferring the mixed solution obtained in the step two to the polytetrafluoroethylene hydrothermal lining, and placing the lining in an oven, performing hydrothermal reaction for a certain time at a certain temperature, and naturally cooling the reactant to the room temperature after the reaction is finished; and step four, washing the reactant after cooling, separating and precipitating, taking out the separated precipitate, and freezing and drying at a vacuum condition to obtain the molybdenum disulfide-graphene aerogel electrode material. The preparation process is simple and the cost is low.
Owner:SHAANXI UNIV OF SCI & TECH
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