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

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 R¹Si (OR²) ₃, trialkoxysilane R³Si (OR²) ₃ or dialkoxysilane R⁴R⁵Si (OR²) ₂ and the corresponding hydrolysis polycondensation oligomer, wherein, substituents R¹ and R⁴ are C_{1 to 18} chain alkyls, R² is methyl, ethyl, propyl, etc., and R³ and R⁵ 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 present invention provides a method for modifying multiwall carbon nano tube, belonging to the field of nano technology. Said method includes the following several steps: (a), adding dried multiwall carbon nano tube raw material and strong oxidative acid into a flask, making ultrasonic treatment, heating, making reflux reaction under the condition of stirring, filtering, repeatedly washing to make the above-mentioned solution be reached to neutrality, vacuum drying so as to obtain acidified multiwall carbon nano tube; (b), adding the above-mentioned acidified multiwall carbon nano tube and acylacting agent into a flask, heating, making reflux reaction under the condition of stirring, filtering, reduced pressure distillation, vacuum drying so as to obtain the acylated multiwall carbon nano tube; and (c), adding the acylated multiwall carbon nano tube and dehydration reagent into flask, at the same time adding the solvent with aminophospholipid into said flask, making ultrasonic treatment, heating, making reflux reaction under the condition of stirring, filtering, repeatedly washing, vacuum drying so as to obtain the multiwall carbon nano tube modified by water-soluble phospholipids.

The invention discloses a universal safe intelligent terminal starting method. According to the method, firstly, a safe starting module s-boot is arranged at the starting skipping position of an intelligent terminal, wherein the integrity reference value of a bootstrap program and the integrity reference value of an operating system are stored; secondly, s-boot is executed after the intelligent terminal is started, the storage positions of the bootstrap program and the operating system of the intelligent terminal are acquired; thirdly, the bootstrap program is installed on the s-boot, the integrity measuring value of the bootstrap program is obtained, the bootstrap program is verified, and if the bootstrap program does not pass the verification, the intelligent terminal is forced to reset; if the bootstrap program passes the verification, the operating system continues to be installed, the integrity of the operating system is measured, the integrity measuring value of the operating system is obtained, the operating system is verified, and if the operating system passes the verification, the bootstrap program is started; if not, the intelligent terminal is forced to reset. The safe starting process of the system can be guaranteed without making other change on a terminal device.

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 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 discloses a preparation method of a single-component liquid fluorine sealing rubber based on silane-terminated liquid fluororubber. According to the preparation method, carboxyl-terminated liquid fluorubber is taken as an initial raw material, reaction with an epoxy silane compound is carried out at base catalysis so as to obtain silane-terminated liquid fluororubber; the obtained silane-terminated liquid fluororubber is taken as a basic polymer, and a diluent, a cross-linking agent, and a filling material are added so as to obtain the single-component silane-terminated liquid fluorine sealing rubber. The advantages of the preparation method are that: the production technology is simple; the resources of the basic polymer are widely available; requirements of different application fields can be satisfied; and when liquid fluorubber containing ether bonds is taken as the basic polymer, the low temperature resistance is better, the cost performance is higher, no volatile component is contained, and no environment pollution is caused.

The invention discloses a preparation method of a polymer anion exchange membrane. The method comprises the following steps: 4,4'-difluoro benzophenone, hydroquinone with one or more methyl groups or a derivative of hydroquinone with one or more methyl groups, and alkali metal carbonate with a mass ratio of 1:1:1.1-1.2 are dissolved in a mixed solvent of N-methylpyrrolidone and toluene; the mixture is subjected to a reaction under high temperature, such that a polymer containing methyl group is obtained; the polymer with methyl group, bromosuccinimide and an initiator with a mass ratio of 1:0.5-0.8:0.01-0.015 are dissolved in chloroform; heating and reflux suction filtration are carried out; a mixture obtained after suction filtration is added into a precipitating agent, and precipitation is carried out, such that a brominated polymer is obtained; the brominated polymer is subjected to a quaternization treatment and is cast into a membrane; and the membrane is heated and dried, such that the polymer anion exchange membrane is obtained. The method is simple and highly efficient. The obtained polymer anion exchange membrane has high ion exchange capacity, high chemical stability, high thermal stability, and excellent mechanical properties.

The invention belongs to the technical field of polymer materials and particularly provides a preparation method of a waterborne PES (polyether sulfone) coating. The method comprises steps of polymersynthesis, emulsification and purification; a compound precipitation liquid containing a surfactant is designed firstly and is added gradually through a high-speed dispersion device after resin polymerization, so that milk-white mixed slurry is separated out of PES resin gradually in a liquid phase, and the PES coating with different solid content is prepared after separation and purification. Thewaterborne PES coating is prepared directly through polymerization, the technological process of production is shortened, the problem of difficulties in product purification and solvent recovery is solved effectively, meanwhile, macromolecular chains of the PES resin are not damaged, and purity and performance of the product are guaranteed. The waterborne PES coating prepared with the method is small in particle size, stable in performance and capable of being widely applied to the field of heat-resistant and corrosion-resistant coatings.

The invention discloses a folding and unfolding device of a foldable catamaran. The device comprises a front folding and unfolding device, a rear folding and unfolding device, two floating bodies, an operation platform, and a front base and a rear base which form the foldable catamaran. The operation platform and the floating bodies are connected through retracting and releasing mechanisms, unfolding and folding can be carried out, the stability of water surface navigation can be improved when the device is unfolded, the size is smaller when the device is folded, and carrying, transportation and storage are convenient. The folding and unfolding device is composed of symmetrical hinge four-bar mechanisms, the kinematics of the folding and unfolding device meets the condition that a hinge four-bar mechanisms have determined motion, the folding and unfolding system can form a truss structure after being unfolded, and the folding and unfolding device has high strength and rigidity. All the assemblies of the whole ship body can be detached, and installation, debugging, transportation and storage are convenient. The operation platform is free in design, a user can carry out refitting design on the operation platform according to own requirements, and the requirements of different application fields of the ship can be met.

Disclosed is a manufacturing method of an aluminum alloy cavity board for furniture. Two or more aluminum alloy cavity veneers are bonded and spliced in a side surface parallel mode, and the side surfaces of the aluminum alloy cavity veneers are bonded and spliced in parallel. The aluminum alloy cavity board for the furniture is manufactured through the manufacturing method of the aluminum alloy cavity board for the furniture. Compared with an existing large-size profile extrusion technology and an existing welded profile, the bonded aluminum alloy cavity board is high in splicing and forming speed, high in flexibility, small in flatness tolerance and small in weight, the demands of different application fields can be met, the operation is convenient and fast, and therefore the purposes of saving raw materials and reducing product manufacturing cost are achieved.

According to a preparation method of a hard-water-resistant, acid-alkali-resistant and degradable multifunctional surfactant, succinic anhydride sodium sulfonate, polyether amine and alkylamine are used as raw materials to prepare the multifunctional surfactant containing an amido group, a hydrophilic nonionic polyoxyethylene ether chain, a hydrophilic sulfonate anion group and an oleophylic alkyl chain. A series of surfactants with different molecular weights and different HLB values can be obtained by adjusting the length of a polyoxyethylene chain and the length of the alkyl chain, and the surfactant has the advantages of hard water resistance, difficulty in hydrolysis and capability of meeting the requirements of different application fields.