126results about How to "Strong intermolecular forces" patented technology

The present invention uses polycarboxylic acid type high-molecular copolymer as dispersing agent and fixing agent to prepare superfine pigment ink as ink-jet printing ink. It is characterized by that the pigment dispersing agent and fixing agent are made into the same compound, after it is jetted and printed, the high temperature can be used to fix the pigment on the fibre and obtain required fastness. The average grain size of pigment granules prepared by said method is less than 300 nm.

The invention discloses a diaphragm for a sounding device, a sounding device and an assembling method thereof. The diaphragm includes a diaphragm layer prepared by subjecting at least one of an ethylene-acrylate copolymer and an ethylene-acrylic ester-carboxylic acid copolymer to crosslinking reaction. The molecular structure of the diaphragm includes a vinyl-acrylic group. The group reduces the chemical structure symmetry of a material, reduces tacticity, and increase steric hindrance, so that the diaphragm has a high loss factor and the sounding device has a good damping effect.

The invention discloses a novel PLGA-PEG-PLGA multipolymer microbubble ultrasound contrast agent and preparation method thereof. The microbubble ultrasound contrast agent is provided with an outer housing prepared from the polymer material PLGA-PEG-PLGA, the components of the inner core of gas include perfluoropropane, decafluorobutane or sulphur hexafluoride, and the like, and the molecular weight of the PLGA-PEG-PLGA multipolymer ranges from 2000 to 20000 dal. The preparation of the agent adopts the double emulsion method, and after being frozen and dried, gas molecules are led into microbubbles. The multipolymer microbubble contrast agent has favorable backscattering performance, shows the enhanced effect of ultrasonic contrast during in vivo and in vitro experiments, is safe and nontoxic, and meets the requirement of the ultrasound contrast agent.

The invention relates to a flexible cell based on metallic oxide/graphene composite macroscopic fibers and a preparation method. The preparation method comprises the following steps: after mixing an anionic metal oxide aqueous solution with graphene oxide to obtain a spinning solution, adding the spinning solution in wet spinning equipment to obtain nascent fibers; repeatedly washing the obtained nascent fibers with deionized water, and drying the nascent fibers to obtain metallic oxide and graphene oxide composite fibers; reducing the metallic oxide and graphene oxide composite fibers with hydroiodic acid, and then washing and drying the metallic oxide and graphene oxide composite fibers to obtain the metallic oxide and graphene composite fibers; placing the composite fibers, lithium lines and lithium manganate loaded carbon cloth fibers in a shrinkable tube in parallel; and adding diaphragms and electrolyte so that half cells and total cells can be assembled respectively. The preparation process is simple and controllable, and large-scale production is facilitated. The metallic oxide and graphene composite fibers which are prepared by the preparation method for the first time have unlimited prospects in the field of energy storage of flexible cells.

The invention provides a preparation method of an intelligent stress response material, and the preparation method comprises the following steps of: (A) mixing organic polydimethylsiloxane, a boron-containing compound, a difunctional chain extender and a functional modifier, and reacting and drying to obtain an intelligent stress response material precursor; and (B) carrying out post processing on the intelligent stress response material precursor to obtain the intelligent stress response material, wherein the post processing is one or more of heating, microwave radiation, dispersant mixing, dispersant removal, extrusion and rolling. The intelligent stress response material provided by the invention has the advantages of better stress response capacity, high energy absorption rate and self-repairing property.

The invention belongs to the field of luminescent materials, and relates to a rare earth metal organic framework material and a synthesis method thereof. The rare earth metal organic framework material is constructed with deprotoned 2,4,6-tris(4-carboxyphenyl)-1,3,5-triazine as ligands, with rare earth metal ions as luminescent centers by pi-pi interaction of the ligands or C-H-pi interaction of the ligands and a solvent. The distance between the centers of aromatic rings corresponding to the pi-pi interaction of the ligands is 5 Angstroms, the interaction of the ligand molecules is enhanced,the rigidity of a material skeleton is increased, the loss of energy on the skeleton is reduced, the energy transfer from the ligands to the rare earth metals is also enhanced, the energy utilizationefficiency is greatly enhanced, and thus high quantum yield is obtained. The luminescent metal organic frame material has high energy utilization rate, and the quantum yield of the luminescent metal organic frame material is increased from less than 60% to 99.9% compared with that of a conventional rare earth metal organic frame material.

The invention discloses a polymer emulsifying and thickening agent and a preparation method thereof. The polymer emulsifying and thickening agent contains a plurality of polymerization monomers, wherein each polymerization monomer contains the following components in percentage by mass: 30.0-99.9% of anionic monomers and 0.1-10.0% of amphoteric cationic monomers; the anionic monomers are one or at least two selected from acrylic acid, methacrylic acid and 2-acrylamide-2-methylacrylsulfonate; the amphoteric cationic monomers are one or at least two selected from N, N-dimethyl-N-dodecyl methylallyl ammonium chloride, N, N-dimethyl-N-tetradecyl methylallyl ammonium chloride, N, N-dimethyl-N-dodecyl allyl ammonium chloride and N, N-dimethyl-N-dodecyl tetradecyl allyl ammonium chloride; and the weight-average molecular weight of the polymer emulsifying and thickening agent is 2000-6000 thousands. The polymer emulsifying and thickening agent is good in thickening and emulsifying effects and salt resistance, high in swelling speed and low in preparation cost and can be produced on a large scale.

The invention provides a printing method adopting a photo-curing 3D printer. The printing method comprises a single-layer printing step: setting of cross section patterns; setting of a scanning area; rotation display; irradiation curing. According to the printing method adopting the photo-curing 3D printer, liquid photosensitive resin has certain viscosity, so that the locally cured part can apply larger intermolecular force to the liquid photosensitive resin, the liquid photosensitive resin is pulled to formed thin layers and gaps in the bottom of a photosensitive resin tank, and follow-up photo-curing is facilitated. Thus, the printing method has the high forming precision and the high forming speed 20-100 times that of an existing printing method.

The invention belongs to the field of preparation of a nano composite material, and especially relates to an aliphatic polyester-nano hydroxyapatite composite material and a preparation method thereof. The preparation method comprises the following steps: 1) employing coprecipitation and a hydrothermal method or a sol-gel/static spinning method, synthesizing a hydroxy apatite nano rod or nano fiber, 2) realizing surface cladding modification on nano hydroxy apatite through dopamine oxidation auto-polymerization; and 3) employing a solution blending method, the aliphatic polyester/nano hydroxy apatite composite material film or a porous support can be prepared. The method has advantages of mild modification condition, simple operation, and obvious modification effect, the aliphatic polyester-coated hydroxy apatite is uniformly dispersed in an aliphatic polyester matrix, interface bonding property is improved, the mechanical properties of the aliphatic polyester-coated hydroxy apatite composite material is obviously improved, and the composite material can be used in relative filed of bone tissue regeneration restoration.

The invention discloses a method for preparing a magnetic halloysite molecularly imprinted polymer with specific adsorption to 2,4-dichlorophenoxyacetic acid. The preparation method comprises the following steps: preparing magnetic halloysite nano-tubes by using corroded halloysite nano-tubes by a coprecipitation method; reacting the magnetic halloysite nano-tubes and methacrylate in methylbenzene to obtain magnetic halloysite nano-tubes with double-bond-modified surfaces; after polymerizing the magnetic halloysite nano-tubes with double-bond-modified surfaces, the polymerized monomers and a crosslinker by taking the 2,4-dichlorophenoxyacetic acid as a template, then removing the 2,4-dichlorophenoxyacetic acid to obtain the magnetic halloysite molecularly imprinted polymer with specific adsorption to the 2,4-dichlorophenoxyacetic acid. The raw materials used in the preparation method are low in cost; the preparation method is easy to operate and easy to implement; the prepared magnetic halloysite molecularly imprinted polymer is stable in structure, has specific adsorption to the 2,4-dichlorophenoxyacetic acid, and can effectively separate and remove the 2,4-dichlorophenoxyacetic acid from a complex system.

The invention discloses a self-repairing graft copolymer based on a hydrogen bond action and a preparation method of the self-repairing graft copolymer and belongs to the technical field of polymer materials. The preparation method comprises the following steps: 1) preparing a polymer macromonomer of which the end group is provided with double bonds; and 2) preparing the self-repairing graft copolymer, namely carrying out a free radical polymerization reaction on a second monomer and the polymer macromonomer of which the end group is provided with the double bonds in the step 1) under the action of a free radical polymerization initiator to prepare the self-repairing graft copolymer with a "comb-type" structure or a "centipede-type" structure or a "three-chain-type" structure or a "barbed-wire-type" structure. The self-repairing graft copolymer has relatively good thermodynamic properties and a self-repairing function.

The invention relates to a macromolecule heat conduction material, which is composed of matrix resin and a heat conduction filler. The weight ratio of the matrix resin and the heat conduction filler is 100: 300-1100. A preparation method of the macromolecule heat conduction material is further disclosed. Heat conductivity coefficient of the long-wetting macromolecule heat conduction material is adjustable in 1-6.0W/m.K, the macromolecule heat conduction material can be used for heat dissipation of high-power electronic products, can be used for design and development of civil electronic products in a large amount, is low in cost and good in dielectric performance, and simultaneously has insulation and sealing effects.

The invention belongs to the technical field of lubricants and discloses a carbon nano tube complex filled with a lubricant additive and a preparation method of the carbon nano tube complex. The complex is a one-dimensional nano composite material obtained by filling an oiliness additive or an extreme pressure additive into inner cavities of carbon nano tubes subjected to acidizing treatment, and the complex comprises 80-90 parts of carbon nano tubes and 10-20 parts of the oiliness additive or 10-20 parts of the extreme pressure additive. The complex serving as a lubricant additive can permeate into a friction area along with base fluid. The carbon nano tubes are extruded, deformed and broken in the friction process, the lubricant additive can be released, and a lubricating film is produced through physical or chemical adsorption so as to achieve a lubricating effect, so that the antifriction, wear-resistant and extreme pressure properties of the carbon nano tubes are improved. The complex disclosed by the invention further serves as an additive of certain commercial lubricating oil. Compared with lubricating oil added with pure carbon nano tubes, the lubricating oil added with the complex according to a proper ratio has the advantages that the friction coefficient of the lubricating oil can be obviously reduced, the wear is reduced, and the maximum non-seizure load of the lubricating oil is improved.

The invention provides a wafer plasma cutting protection liquid, a preparation method and application thereof. The wafer plasma cutting protection liquid comprises the following components in parts by weight: 5-40 parts of a water-soluble resin, 0.1-2 parts of a wetting agent, 0.1-2 parts of a defoaming agent, 0.1-2 parts of a free radical capturing agent, 5-20 parts of an organic solvent, and 34-89.7 parts of water. The wafer plasma cutting protection liquid can quickly form a film on the surface of a wafer, and has good heat resistance and removability. During wafer processing, by using the protection liquid, condensed silicon steam or other chippings generated in the processing process can be effectively prevented from being deposited on the surface of a chip. According to the invention, the wafer plasma cutting protection liquid has high thermal stability, the situation that the surface of a wafer is directly exposed to the external environment due to the fact that a protection film is decomposed when plasma cutting is carried out under the thermal effect of laser cutting or the high working temperature can be avoided, and the reliability and the yield of products are effectively improved.

The invention discloses a high-temperature-resistant adhesive for a lithium ion battery and a battery pole piece applying the adhesive. The preparation method comprises the following steps: adding diamine containing functional groups and dicarboxylic anhydride according to a certain ratio for solution polycondensation; preparing a polyimide precursor-polyamic acid solution with a certain concentration, uniformly mixing the polyimide precursor-polyamic acid solution with an active substance and a conductive agent, coating the surface of a current collector with the obtained mixture, and carrying out programmed heating heat treatment to make polyamic acid undergo a thermal imide cyclization reaction in order to form polyimide in order to prepare the lithium ion battery pole piece with polyimide as a binder. The polyimide adhesive containing the functional group prepared by the invention is excellent in high-temperature resistance; the polyimide adhesive is simple in preparation method and good in chemical stability, the bonding strength of the polyimide adhesive can be improved by regulating and controlling the variety and proportion of functional groups and increasing flexible chainsegments, it is guaranteed that a pole piece can be dried and dewatered at high temperature, the cycle performance and safety performance of a battery are improved, and the polyimide adhesive has wide application prospects in the field of high-temperature-resistant, high-safety and high-specific-energy lithium ion batteries.

The invention provides a preparation method of Chinese herbal medicine wall-broken decoction pieces, which comprises the following steps: step 1, pretreatment of traditional Chinese medicinal materials: (1) surface modification: treating the traditional Chinese medicinal materials in a plasma box for 1-3 minutes under the conditions that the working current is 0.2-1A and the air pressure is 1-2 Mpa, and then performing proton irradiation treatment for 2-4 minutes. According to the method, the traditional Chinese medicinal materials are modified in a surface physics and solution chemistry combined mode, plasma and proton irradiation treatment is adopted for surface modification, the surface microstructure of the traditional Chinese medicinal materials can be damaged, and a basis is providedfor subsequent chemical solution modification.

The invention relates to toughening phenolic resin and a preparation method thereof. The toughening phenolic resin is prepared from, by weight, 100 parts of phenolic resin, 30-90 parts of carboxyl-terminated butadiene-acrylonitrile rubber, 15-45 parts of zirconium diboride and 0.3-0.8 part of a dispersing agent. The preparation method comprises the steps that 0.3-0.8 part of dispersing agent is dispersed in the solvent, and a dispersion solution is obtained; 100 parts of phenolic resin, 30-90 parts of carboxyl-terminated butadiene-acrylonitrile rubber and 15-45 parts of zirconium diboride aremixed to be uniform, and a mixture is obtained; the obtained mixture is divided into multiple parts, and then the multiple parts of mixture are added in the dispersion solution in sequence and stirredand dispersed to be uniform, and the toughening phenolic resin is obtained. Accordingly, the carboxyl-terminated butadiene-acrylonitrile rubber, zirconium diboride and other fillers are adopted for modifying the phenolic resin, and on the premise that it is guaranteed that the anti-ablation property of the toughening phenolic resin is not reduced, the problem that interface debonding occurs aftera resin-based composition material and a metal cabin are integrally formed is solved.

Quinoid compounds and a preparation method and applications thereof are disclosed. The general structure of the compounds is shown in the description. The structures of the compounds can be easily modified, and the compounds have characteristics of good molecular skeleton planarity, high self-assembling capability, low energy level of the highest unoccupied orbit (LUMO), narrow band gaps, and insensitivity to water and oxygen, and therefore the compounds as organic semiconductor materials can greatly improve hole and electron transmission capability so that the compounds are applied as n type(electron transmitting) materials and bipolar materials (capable of transmitting holes and electrons) into organic field effect transistors, organic solar cells, perovskite solar cells, organic thermoelectric and organic light-emitting devices, and the like.