113results about How to "Small free volume" patented technology

The invention relates to a packaging material of a photovoltaic module, in particular to a high-volume resistivity EVA (Ethylene Vinyl-acetate Copolymer) rubber film and a preparation process of the rubber film. The EVA rubber film comprises the following components in percentage by weight: 82%-94% of EVA resin, 5%-15% of polyolefin elastomer (POE), 0.1%-0.5% of ultraviolet aging resisting additive, 0.3%-1.5% of liquid peroxide cross-linking agent and 0.1%-1.0% of liquid silane coupling agent. The high-volume resistivity EVA rubber film disclosed by the invention reduces the VA content, reduces generation of conductive ions, and can increase the resistivity. The polyolefin elastomer is easy to be cross-linked by the effect of an initiating agent, and a plurality of positions are cross-linked with the EVA molecule, thereby realizing high cross-linking density, firmer molecular chain, smaller free volume, higher resistivity, difficulty in conduction, so the EVA rubber film disclosed by the invention has higher volume resistivity which is as high as 1x1015 ohm.cm or higher.

The invention relates to a high-flux hyperbranched polysiloxane pervaporation membrane and a preparation method thereof, and belongs to the technical field of membrane separation. The preparation method for the membrane comprises the following process steps: mixing and reacting hyperbranched polysiloxane, hydroxyl terminated polysiloxane, a catalyst and a solvent to obtain a casting solution, coating the casting solution on a polymer porous basement membrane, and drying to obtain the high-flux hyperbranched polysiloxane pervaporation membrane. The hyperbranched polysiloxane pervaporation membrane prepared by the method has the characteristics of high permeation flux and high swelling resistance; and moreover, the preparation method is simple, convenient to operate, high in production repeatability and high in membrane structure controllability, and the high-flux hyperbranched polysiloxane pervaporation membrane is suitable for removing low-concentration alcohols from water, particularly suitable for separating low molecular alcohols from fermentation liquor.

The invention discloses a halogen-free resin composition. The composition is prepared by fully mixing hydrogenated bisphenol A type epoxy resin, alicyclic epoxy resin, novolac epoxy resin curing agent, aluminum hydroxide serving as an inorganic filler and organic solvent uniformly. The invention also discloses a copper clad plate prepared from the halogen-free resin composition. The copper clad plate has good thermal stability and creepage tracing property. The halogen-free resin with high comparative tracking index (CTI) resin is adopted, and the consumption of the aluminum hydroxide servingas the inorganic filler is reduced, so that the composition has high CTI value, avoids series problems caused by using excessive aluminum hydroxide and simultaneously realizes halogen-free and environment-friendly properties.

The invention relates to a method for improving the freezing resistance of protein in fermentative freeze flour dough, belonging to foodstuff technique field, mixing the flour, molecular distillation gly ester, sodium alginate, cane sugar, salt, milk powder, and shortening in the stirring tank, adding ice water and activated pentosanase and glucose oxidase solution and yeast solution; stirring until the flour dough forms, through static relaxation, measuring, block separation, rolling and static relaxation again to form flour dough, then freezing for convenient use and instant curing. The invention employs the natural matter of pentosanase and glucose oxidase to catalyze the cross-linking between protein to form more stable flour gluten net structure, which prevent the damage to flour gluten net structure by ice crystal in the froze flour dough, and employs molecular distillation gly ester and sodium alginate to reduce the ice crystal volume, improve the stability of froze flour dough under low temperature to make the specific volume of produced bread be increased obviously and the pulp structure be more delicate and uniform.

A degradable nontoxic seed coating agent comprises basic materials of water-soluble chitosan of 1.0-1.5wt%, gelatine of 0.05-0.1wt%, glycerol of 0.05-0.1wt%, PVA of 1.0-1.5wt% and plant extract of remainder, with the tensile strength of 18.7MPa, elongation of 10.1%, vapor transmission rate of 12.69g.mm/mm2.hr.mmHg, air permeability of (CO2)0.358*10-10ml.cm/cm2s.cmHg, air permeability of (O2)0.215*10-10ml.cm/cm2s.cmHg, hygroscopic rate of 47% and apparent viscosity of 290cp; uses water-soluble chitosan, PVA and plant extract to form seed coating film to not only meet performance requirement of conventional seed coating agents, but remarkably improve performance of film.

The invention provides polyimide resin. The polyimide resin is prepared according to the following method that a polymerization reaction is performed on aromatic dianhydride of the structure as a structural formula (I), nitrogenous heteroaromatic diamine of the structure as a structural formula (II) and aromatic diamine of the structure as a structural formula (III) in an organic solution to obtain a polyamide acid solution; copper foil is coated with the polyamide acid solution, and hot imidization is performed after the organic solution is removed to obtain a flexible glue-free copper-clad plate. The polyimide resin is matched with the copper foil in thermal expansion coefficient, and size stability of the copper-clad plate in the application process is achieved. Moreover, bonding strength between the polyimide resin and the copper foil is good.

The invention provides a novel capsule capable of intelligently regulating and releasing fragrance according to the environment temperature and a preparation method of the novel capsule. The preparation method of the novel capsule comprises the following steps: (1) carrying out free radical polymerization on (methyl) alkyl acrylate to obtain a comb-shaped polymer; (2) commonly dissolving the comb-shaped polymer and essence in a low-boiling-point organic solvent to obtain a uniform organic phase; and (3) adding the organic phase into an emulgator-containing aqueous solution for emulsifying, thus obtaining emulsion droplets with particle range of 10nm-5mm, then increasing the temperature according to programs for removing the low-boiling-point organic solvent in the emulsion droplets, filtering and washing the emulsion droplets to obtain an essence capsule of a core-shell structure. The preparation method of the novel capsule is simple in process, low in requirement on equipment and mild in reaction condition, has an energy-saving effect and is suitable for large-scale production; the wall of the prepared essence capsule is the comb-shaped polymer of the crystallizable side chain; the length or structure of the side chain can be regulated and controlled so as to control the crystallization temperature of the side chain, so that the release rate of the essence of the capsule under different temperatures can be intelligently regulated and controlled. The intelligent fragrant capsule is capable of adjusting the release rate of the fragrant smell according to the outside temperature change; the intelligent fragrant capsule can be directly applied to the intelligent thermoregulation textile field and the cosmetic field.

The invention relates to a biological oxidant for fermentative freeze flour dough, belonging to foodstuff technique field. The product is prepared by mixing the glutamine-glutamyltransferase, ascorbic acid, mycose, and guar gum under normal temperature, measuring, packing and freezing. The invention employs the glutamine-glutamyltransferase to catalyze the cross-linking between protein to form more stable flour gluten net structure, employs ascorbic acid to oxide the sulfhydryl group in the flour gluten protein structure to disulfide bond to intensify the combination between the protein peptide chains or molecules, which prevent the damage to flour gluten net structure by ice crystal in the froze flour dough, employs mycose to reduce the death rate of yeast cell during freezing process, and employs guar gum to control the growing speed and size of the ice crystal in the froze flour dough to make the specific volume of produced bread be increased obviously and the pulp structure be more delicate and uniform.

The invention discloses polyimide with high barrier property and a preparation method and application thereof. The rigid planar structure anthraquinone ring and the polar group secondary amine are introduced into the main chain of the prepared polyimide, the anthraquinone ring enables the polyimide molecular chain to be piled up more tightly, the free volume of the polymer is reduced, and thus thebarrier property of the polyimide is effectively improved. The anthraquinone ring can also increase the rigidity of a polyimide molecular chain and limit the movement of the molecular chain so that the polymer is difficult to form a gas channel, and the barrier property of the polyimide is effectively improved. Meanwhile, the secondary amine structure generates hydrogen bonds in molecular chainsand among the molecular chains, the hydrogen bond effect can improve the polyimide molecular chain stacking efficiency, polyimide crystallization is induced, and the thermal stability, mechanical properties and barrier properties of the polyimide are improved.

A lining layer material for deep sea oil pipeline and preparation method thereof, which solves the technical problem that existing deep sea oil pipeline is poor in high temperature and corrosion resistance, short in service life, the lining layer material is prepared from the following components in percentage by mass: 85% of material A and 15% of material B; wherein the material A is prepared from the following components in parts: 70-75 parts of EPDM, 25-30 parts of PE, 0.2-0.4 parts of DCP, 2-4 parts of silane, 1-1.5 parts of crylic acid; the material B is prepared from the following components in parts: 100 parts of PE, 2-3 parts of antioxygen, 1-1.6 parts of catalyst. The preparation method of the lining layer material for deep sea oil pipeline is also provided.

The invention relates to the technical field of metallic glass surface treatment, in particular to a laser fatigue enhancement method for metallic glass. The laser fatigue enhancement method for the metallic glass comprises the main steps as follows: 1) a metallic glass surface is ground and polished, and is cleaned with alcohol; 2) the metallic glass surface is subjected to heat treatment by adopting a CO2 continuous laser, and the treatment temperature is controlled through adjusting the laser process parameters so as to enable the surface to have an amorphous-nanocrystal composite structure; 3) aluminum foil is attached to the heat-treated metallic glass surface; and 4) flowing water is defined as a constrained layer, and an Nd: Glass nanosecond pulse laser is adopted to impact the metallic glass surface to which the aluminum foil is attached, so as to obtain surface enhancement modified metallic glass. The invention integrates advantages of the laser thermal effect, comprehensively regulates and controls the microstructure and the stress state of the metallic glass surface, and effectively enhances the fatigue performance. The invention has a simple process, is suitable for producing the metallic glass on a large scale, and can prepare the metallic glass with a high anti-fatigue performance.

The present invention belongs to the technical field of membranes, and particularly relates to a Nafion grafted polyvinyl azole composite proton exchange membrane and a preparation method thereof. According to the present invention, Nafion is adopted as an ATRP macromolecule initiator to initiate a vinyl azole monomer to be subjected to polymerization so as to prepare the Nafion grafted polyvinyl azole composite proton exchange membrane; the proton conductivity of the obtained Nafion grafted polyvinyl azole composite proton exchange membrane is significantly improved compared with the pure polymer proton exchange membrane, and the Nafion grafted polyvinyl azole composite proton exchange membrane has excellent selectivity; and the method has characteristics of simple operation process, mild preparation condition, low production cost, easy batch and large-scale production, good industrial production foundation and broad application prospects.

The invention discloses a CAF-resistant, high-Tg and high-heat-resistance resin composition for a copper-clad plate of automobiles. Based on solids, the composition is prepared from the following components in parts by weight: 5 to 35 parts of biphenyl epoxy resin, 5 to 40 parts of bisphenol A epoxy resin, 10 to 65 parts of low-bromine/high-bromine epoxy resin, 1 to 15 parts of MDI modified epoxy resin, 20 to 50 parts of phenolic resin, 10 to 40 parts of barite and 0.05 to 1 part of accelerant. The copper-clad plate has the excellent comprehensive performance of high Tg, high heat resistance, high toughness, low hygroscopicity and high CAF resistance, reaches the flame retardance requirement, has high machining performance, and has a wide application prospect in the field of new energy automobiles and the production industry of electronic products.

The invention discloses nanometer calcium carbonate paint and a production process. The nanometer calcium carbonate paint consists of soft water, wetting agents, dispersing agents, anti-corrosion agents, anti-freezing agents, PH value regulating agents, film forming agents, defoaming agents, nanometer calcium carbonate, fine triple superphosphate, triple superphosphate, talc powder, kaolin, cellulose, emulsion, flatting agents and thickening agents. The production process of the nanometer calcium carbonate paint comprises the following steps of: (1) prefabricating nanometer calcium carbonate pulp; (2) preparing water solution of auxiliary agents; (3) taking and using the prefabricated nanometer calcium carbonate pulp according to the solid content and preparing pulp; (4) pumping ground pulp into a thinning tank by a pump; and (5) putting the cellulose into the step (4) to obtain finished products. The nanometer calcium carbonate paint and the production process have the beneficial effects that: 1, the performance of the paint is improved; 2, the shielding effect is improved; 3, the protection capability is enhanced; 4, the anti-bacterium and deodorization effects are enhanced; and5, the product cost is reduced.

The invention discloses diamine containing a phenothiazine structure and polyimide prepared from the diamine. The method comprises the following steps: reacting an intermediate containing phenothiazine substituted by two halogen atoms with ammonia water to convert the halogen atoms into amino groups; and grafting a nitryl-containing group through Ullmann coupling reaction, reducing to obtain the phenothiazine-structure-containing diamine monomer, and polymerizing the prepared diamine monomer with dianhydride to obtain the polyimide with the main chain containing the phenothiazine structure. A planar rigid structure and a polar group of phenothiazine are creatively introduced into a polyimide main chain, the planar rigid structure is beneficial to regular stacking of molecular chains and induction of polymer crystallization, and the polar group can enhance the hydrogen-bond interaction of the molecular chains and promote tight stacking of the molecular chains, so that polyimide has excellent barrier performance; and the glass transition temperature and the thermal stability are higher, and the thermal expansion coefficient and the antibacterial property are lower.

The invention discloses a preparation method of lithium ion sieve type adsorbent particles for extracting lithium resources from liquid such as salt lake brine, seawater and underground water. The adsorbent particles take a water-absorbing polymer as a carrier, lithium ion sieve type adsorbents such as metatitanic acid type Li2TiO3, spinel type Li4Ti5O12, spinel type Li1.6Mn1.6O4 and spinel type LiMn2O4 are added in a high loading amount, and the adsorbent particles are prepared in a secondary cross-linking mode. The preparation process is simple and suitable for industrial production. The prepared adsorbent particles have the characteristics of high elasticity, porosity, high water absorption, good permeability and the like. A resin matrix is resistant to strong acid and strong alkali, a polyhydroxy structure on the surface of the matrix can effectively adsorb adsorbent particles, and the solution loss rate is effectively reduced. The method can be applied to extraction of lithium elements in salt lake raw brine, old brine, seawater and underground water resources, and meanwhile, the high-strength corrosion-resistant matrix is suitable for an industrial adsorption column process.

The invention relates to the field of lithium ion batteries, in particular to a high-temperature-resistant water-based ceramic binder for a lithium battery diaphragm, a preparation method of the high-temperature-resistant water-based ceramic binder and a lithium battery diaphragm containing the high-temperature-resistant water-based ceramic binder. The binder is latex type acrylic polymer resin with an interpenetrating network structure, the glass transition temperature of the binder polymer is greater than 160 DEG C, and the ratio of the thermal shrinkage rate of the lithium battery diaphragm prepared from the high-temperature-resistant binder at the temperature of 150 DEG C to the thermal shrinkage value measured at the temperature of 120 DEG C is less than 2, so that the thermal shrinkage rate of the diaphragm is slightly changed along with the abrupt rise of temperature, and the requirement of manufacturing the high-safety ceramic diaphragm is met. In addition, the binder is a water-based binder, does not contain an organic solvent, and is safe and environment-friendly.

The invention relates to a cock-type rotary compression expansion mechanism comprising a stator, a rotor, projecting plugs, and cocks. A base circle hole is provided at the center of the stator, and more than one projecting plugs are arranged on the periphery of the base circle hole. The rotor is a base circle column. A central main axis of the rotor is positioned at the center of the stator base circle hole through an end cap. More than one cock slots are provided on the base circle column. The cocks are placed in the cock slots; a sealed hollow chamber is formed between the stator base circle hole and the rotor base circle column. The top of the projecting plug is slidably connected with the rotor base circle. Cock outer circles are slidably connected with the stator base circle and the cock slots. The projecting plugs and the cocks separate the sealed hollow chamber between the stator base circle hole and the rotor base circle column into more than two independent sealed working chambers. Transposition slots are arranged on the cock. During rotation transposition, the back ends of side edges of the transposition slots are slidably connected with the back sides of the projecting plugs, and the front ends of the side edges of the transposition slots are slidably connected with the front sides of the projecting plugs, such that working gas is sealed in the transposition slots. The mechanism provided by the invention can be used in devices such as compressor, expander, internal combustion engine, heat pump, and the like.

The invention discloses a carbon-based lithium adsorbent particle for liquid lithium resource extraction. No adhesive needs to be added in the forming process of the adsorbent particles, and carbon has a fixing effect on adsorbent powder; the size is stable, and swelling is avoided in long-term use in strong acid, strong alkali and water; strong acid resistance and strong alkali resistance are achieved, and lithium adsorption under the alkaline condition and desorption operation under the acidic condition can be met; the carbon-based particles have pore structures and can exchange with a solution in the adsorption and desorption process, so that the efficiency is improved. Another purpose of the invention is to provide a preparation method of carbon-based adsorbent particles extracted from liquid lithium resources, and the preparation method comprises the following steps: carrying out extrusion granulation on water-absorbent resin, preparing high-strength water-absorbent particles by using a secondary cross-linking process, and carbonizing the high-strength water-absorbent particles to prepare carbon-based adsorbent particles; the invention also aims to provide a preparation device of the carbon-based adsorbent particles for extracting the liquid lithium resource. The preparation device has the advantages that one set of equipment can be used for producing various products, continuous production can be realized, and the like.