59results about How to "Meet the needs of different application fields" patented technology

The invention relates to a homogeneous cation exchange membrane and a preparation method thereof, the homogeneous cation exchange membrane is characterized in that: cinnamene or / and alkyl cinnamene is taken as a monomer, divinylbenzene is taken as a crosslinking agent, benzoyl peroxide or / and azobisisobutyronitrile is taken as an initiator and bromomethyl or chloracetyl poly 1, 4-dimethyl-2, 6-phenylene oxide are taken as a polymer reinforcing agent to prepare even solution which is coated on a reinforced fabric for polymerization to obtain a base membrane which is then sulfonated in a mixture of concentrated sulphuric acid and chlorosufonic acid to obtain the homogeneous cation exchange membrane. Due to adopting aromatic polymer to produce a functional group by further sulfonation, the cation exchange membrane obtained has high exchange capacity, excellent electrochemical property and even structure. In addition, as the monomer used as the solvent can be polymerized, the preparation method is a green solvent-free technology. The cation exchange membrane series with different structures and functions can be obtained by regulating the content of polymer and crosslinking degree and changing the categories of supporters and the sulfonation condition.

The invention relates to a hollow fiber anion exchange membrane and a preparation method thereof, and is characterized in that bromide polyphenylether is dissolved in organic solvent to obtain spinning solution the polymer mass concentration of which is 20 to 60 percent; then a dry-jet wet spinning is adopted for molding to obtain a bromide polyphenylether hollow fiber inophragma, wherein, the methyl bromide degree is 60 to 120 percent, and the benzene ring bromide degree is 0 to 20 percent; then the inophragma is pretreated and aminated to obtain the hollow fiber anion exchange membrane, wherein, the anion exchange capacity is 1.5 to 2.5mmol / g dry membrane, and the water capacity is 50 percent to 90 percent. The preparation method has the advantages of simpleness, convenience, rapidity and economy, and obtains a hollow fiber anion exchange membrane with different exchange capacity and stable performance through the control on the bromide polyphenylether structure, the spinning conditions, etc.; the hollow fiber anion exchange membrane has the characteristics of uniform structure, high ion exchange capacity, and strong pollution resistibility, and can be series-developed to meet the needs of different application fields.

The invention discloses a high-hardness high-conductivity cooper-carbon composite and a preparation method thereof. According to the method, graphite powder is evenly sandwiched between completely annealed and degreased pure copper plates of which oxidation films are removed, and then the copper plates are subjected to continuous accumulative rolling for many times. Under the action of rolling force, graphite particles are crushed and refined, layers in graphite are gradually separated, and a graphene structure having a remarkably strengthening effect is formed. With increase of rolling passes, carbon (including graphite and graphene) are not only dispersed in a surface parallel to the rolling direction along with lengthening of a sample in the rolling process, but also rapidly dispersed in the thickness direction of the sample. In the accumulative rolling process, copper base bodies generate a strain strengthening effect, so that the uniform high-hardness high-conductivity cooper-carbon composite is obtained finally. The composite has good hardness and comprehensive conductivity. The hardness of the composite can be 3.3 times that of pure copper, and the conductivity of the composite is higher than 90% IACS. The method is simple is preparation process, low in cost and beneficial to large-scale industrial application.

The invention relates to a highly stable aqueous chain alkyl silane emulsion and a preparation method. The emulsion includes continuous aqueous phase, dispersed hydrolyzable alkoxy silane oil phase and emulsifier; the weight ratio of hydrolyzable alkoxy silane, emulsifier and water is 10 to 65:2 to 15:20 to 88. The hydrolyzable alkoxy silane oil phase is composed of chain alkyl trialkoxysilane <OR><1>Si (<OR><2>)3, trialkoxysilane <OR><3>Si (<OR><2>)3 or dialkoxysilane <R><4><R><5>Si (<OR><2>)2 and the corresponding hydrolysis polycondensation oligomer, wherein, substituents <R><1> and <R><4>are C1 to 18 chain alkyls, <R><2> is methyl, ethyl, propyl, etc., and <R><3> and <R><5> are acryloyl oxy propyl, ethenyl, amino propyl, Gamma-glycidyl ether oxyl, etc. The emulsifier is nonionic and ionic complex, including OP series, Span series, Tween series and a composite system composed of sodium dodecyl sulfonate, sodium dodecyl sulfate and dodecyl benzene sulfonate.

The invention relates to spray-forming high-ductility tool steel, which comprises the following chemical components in percentage by mass: 0.75%-1.18% of C, 0.1%-0.4% of W, not more than 3.0% of Mo, 4.2%-6.5% of Cr, 2.8%-4.8% of V, 0.3%-0.9% of Nb, 0.05%-0.5% of Co, not more than 1.2% of Si, 0.2%-1.0% of Mn, 0.05%-0.4% of N, and the balance of iron and impurities, wherein a carbide of the spray-forming high-ductility tool steel is an MC carbide; and the type of the MC carbide is (V, Nb) (C, N). The prepared spray-forming high-ductility tool steel has excellent overall performance, especially shows high toughness property and abrasive resistance, can meet the requirements of different application fields, and is wide in application.