21results about How to "Fully crosslinked" patented technology

The invention belongs to the field of down, and particularly relates to a waterproof down manufacturing method which comprises the following steps: sequentially immersing down filaments into an oxalic acid solution and a mixed solution of oligomerized maleic acid and sodium hypophosphite, and then crosslinking to obtain crosslinked down filaments; and carrying out surface hydrophobic modification on the cross-linked down silk to obtain the waterproof down feather. According to the method disclosed by the invention, the down filaments with poor heat retention property are subjected to cross-linking polymerization, and the obtained down is high in filling power and strong in hydrophobicity and has a great practical prospect.

The invention discloses a beta-naphthol-based trifunctional resin / carbon fiber / diethylenetriamine composite material and a preparation method and application thereof, and belongs to the technical field of polymer resin.The preparation method includes the steps that beta-naphthol-based trifunctional resin and diethylenetriamine are evenly mixed and coated on a plurality of carbon fibers, and after high-temperature curing, pressing and cooling, the beta-naphthol-based trifunctional resin / carbon fiber / diethylenetriamine composite material is obtained; the beta-naphthol-based trifunctional resin / carbon fiber / diethylenetriamine composite material is obtained; the beta-naphthol-based three-functional-group resin is prepared by carrying out polymerization reaction on beta-naphthol, formaldehyde and epoxy chloropropane under the condition of an alkaline medium. Through cross-linking reaction between the beta-naphthol-based trifunctional resin and the curing agent diethylenetriamine with amino, the molecular chain of the epoxy resin is tighter, the intermolecular force is enhanced, a stable cross-linked structure is formed, the curing efficiency of the epoxy resin is improved, and the cured product has higher hardness and glass transition temperature. The doping of the carbon fibers enables the mechanical properties of the epoxy resin to be significantly improved.

The present invention belongs to the technical field of probiotic microcapsules, and specifically relates to a method for preparing microcapsules for embedding probiotics. The present invention first cultivates activated probiotics, prepares them into a probiotic suspension, and obtains a core material solution; then adds modified sodium alginate and whey protein into deionized water, disperses them uniformly by ultrasonication, and obtains a wall material solution after sterilization; finally, the core material solution and the wall material solution are evenly mixed, added into a calcium chloride solution by extrusion, and allowed to stand to form a gel, and then the gel is added into a modified carboxymethyl chitosan solution for stirring, washing, and drying to obtain microcapsules; the present invention uses modified sodium alginate, whey protein, and modified carboxymethyl chitosan as embedding materials, and realizes efficient embedding of probiotics. The prepared microcapsules have good mechanical properties, good tolerance in simulated gastric juice, simulated intestinal juice, and at 4°C, and can maintain a high survival rate and stability of the probiotics in the microcapsules.

The invention discloses a forming process and application of an epoxy resin product. The molding process comprises the following steps: mixing preparation raw materials including epoxy resin, silica powder and an anhydride curing agent, and carrying out casting molding to obtain an epoxy resin product, wherein the conditions of casting molding are as follows: first-stage curing: curing at 105-120 DEG C for 3-10 hours; second-stage curing is conducted, specifically, curing is conducted for 16-22 h at the temperature of 130-135 DEG C; wherein the epoxy resin is solid bisphenol A type epoxy resin, the epoxy value of the epoxy resin is 2.4-2.65 Eq / kg, and the viscosity of the epoxy resin at 120 DEG C is 370-550 mPa.s. According to the process, an epoxy resin product with excellent performance can be prepared, the appearance quality of the molded epoxy resin product is good, and the process can be used for producing large-size and high-voltage-grade insulating products. The invention further provides application of the forming process.

The invention relates to a flexible composite material capable of being directly engraved by laser as well as a preparation method and application thereof, and belongs to the field of functional composite materials. Thermosetting phenolic resin powder and PDMS are mixed according to a certain proportion and prepared into a film to obtain the flexible wearable composite material capable of being directly engraved by laser, so that the preparation cost is greatly reduced, the preparation process is simplified, the sensitivity and stability of the material are improved, the flexibility and the stretchability are greatly improved, and the application prospect is wide. The method can be applied to laser engraving and preparation of the flexible wearable sensor, and the performance and the application prospect of the flexible wearable sensor are remarkably improved.

The application discloses a kind of copper electrode laser curing system and method of TOPCon solar cell, the system includes mid-infrared laser generation module, beam shaping and energy management module, precision motion and positioning platform and synchronous control and monitoring module.The method used is: after coating copper paste on the back silver seed layer of TOPCon battery, laser beam is irradiated, by accurately controlling laser energy density and pulse width, energy is selectively resonant absorbed by copper paste organic matter, millisecond level rapid curing is realized, while ensuring that energy density is lower than the damage threshold of lower layer aluminum oxide / silicon nitride passivation film, so that the base temperature rise is lower than 200 DEG C.The application overcomes the defects of traditional thermal curing, such as low efficiency, high energy consumption and easy damage to passivation layer, and provides an efficient, reliable and non-damage battery performance industrialization solution for TOPCon battery low-cost "de-silverization".

The present invention provides a method for enhancing the hardness of carbon materials, comprising the following steps: a) placing a thermosetting polymer in a pure oxygen atmosphere in a low temperature and high pressure environment to obtain an oxygen-saturated thermosetting polymer; b) placing the device used in a) in a plasma excitation chamber, applying a high voltage and high frequency electric field while pumping the device used in a) to a low pressure atmosphere to obtain an oxidized thermosetting polymer; c) placing the oxidized thermosetting polymer obtained in b) in a catalyst solution, soaking and drying, pre-carbonizing under a protective atmosphere, acid washing and water washing to remove impurities and drying; d) taking the pre-carbonized product obtained in c) and carbonizing it at a higher temperature for a second time, cooling it, and obtaining a high-hardness carbon material. The present invention enhances the number of oxygen-containing functional groups of the thermosetting polymer precursor by combining the bulk adsorption of oxygen with the oxidation of high voltage plasma; and using a catalyst to fully crosslink aromatic molecules during carbonization to enhance the hardness of the prepared carbon material.

The invention discloses a manufacturing process of a liquid hydrogen storage tank with a carbon-based anti-seepage coating on the inner wall. The manufacturing process comprises the following steps that a liquid hydrogen storage tank base body and the carbon-based anti-seepage coating are prepared; wherein the carbon-based anti-seepage coating comprises carbon nanotubes and polymer resin, and the mass fraction of the carbon nanotubes in the carbon-based anti-seepage coating is 30%-50%. And the surface of the inner wall of the liquid hydrogen storage tank base body is coated with the carbon-based anti-seepage coating, the carbon-based anti-seepage coating is cured, and the liquid hydrogen storage tank with the carbon-based anti-seepage coating on the inner wall is obtained. Wherein the thickness of the carbon-based anti-seepage coating is 30 + / -5 [mu] m. The liquid hydrogen storage tank carbon-based anti-seepage coating prepared through the method is high in adhesive force, excellent in anti-seepage performance and high in pressure resistance, and the carbon-based anti-seepage coating is uniform and free of bubbles, cracks and other defects in the preparation process.

The present invention belongs to the technical field of rubber strip manufacturing, and specifically relates to a manufacturing device and manufacturing method of a functional rubber strip, including a first precision extrusion extruder for mixing the main material, a second precision extrusion extruder for mixing the auxiliary material, a heating mold sleeve, a multifunctional speed measuring device and an automatic winding device, the heating mold sleeve has a mold sleeve main channel for feeding the main material and a mold sleeve side channel for feeding the auxiliary material, the outlet end of the first precision extrusion extruder is docked with the mold sleeve main channel of the heating mold sleeve, the outlet end of the second precision extrusion extruder is docked with the mold sleeve side channel of the heating mold sleeve, an extrusion mold is arranged in the mold sleeve main channel, and the cavity of the extrusion mold is connected with the mold sleeve main channel and the mold sleeve side channel. The manufacturing method and manufacturing device of the present invention can realize the direct molding of the functional rubber strip in the die, avoiding secondary drying tunnel molding, and has stable process, precise size, high production efficiency and sufficient cross-linking.

This invention discloses a multi-element doped porous carbon and its preparation method, belonging to the technical field of porous carbon materials. The preparation method includes the following steps: S1, mixing phenol, 4-(2-epoxyethylenemethoxy)phenol, formaldehyde aqueous solution, and a catalyst to obtain a mixed solution; S2, ultrasonicating modified graphene oxide in anhydrous ethanol to obtain a modified graphene oxide solution; S3, adding the modified graphene oxide solution to the mixed solution, heating and reacting, then adding a curing agent, stirring, and after the reaction is complete, dehydrating, drying, grinding, and curing to obtain a modified graphene oxide / phenolic resin; S4, carbonizing the modified graphene oxide / phenolic resin to obtain a carbonized material; S5, activating the carbonized material to obtain multi-element doped porous carbon. This invention ultimately yields multi-element doped porous carbon with both high conductivity and abundant pseudocapacitive active sites.

The invention relates to the technical field of ceramic-based composite materials, and particularly discloses a preparation method of a porous carbon intermediate. According to the preparation method of the porous carbon intermediate, regulation and control of the pore structure of the porous carbon intermediate are realized on the basis of a sol-gel method in combination with a molecular control technology. During preparation, the carbon element-containing resin with specific composition and a resin monomer are adopted to form gel with a high-concentration net structure, and then the gel is carbonized to form a stable carbon skeleton. On the basis of a carbon skeleton, a thermosetting resin carbon source and inorganic particles with different functions are added to realize the effects of uniform dispersion, specific surface area increase and pore channel fixation, so that a porous carbon intermediate structure with uniform pores and uniform size is prepared.

The present application relates to the technical field of functional food materials and bio-based composite material preparation, and in particular to a high-strength sodium alginate-starch composite emulsion gel, a preparation method and application thereof. First, gelatinized starch is homogenized with sucrose fatty acid ester and vegetable oil to prepare a starch composite emulsion, and a stable emulsion system is formed by short straight-chain starch in the starch composite emulsion and vegetable oil; then the emulsion is mixed with a sodium alginate solution, and a calcium alginate network and a starch-oil composite enhanced double-network structure are constructed through pre-freezing immobilization treatment combined with a low-temperature slow calcium ion crosslinking process, thereby solving the problems of weak strength of existing sodium alginate-based emulsion gels, unstable oil and fat embedding, and difficulty in meeting complex food processing conditions, and providing an ideal animal fat replacement material for the development of healthy meat products.

The invention discloses a high-temperature-resistant hot melt adhesive and a preparation method thereof, and relates to the technical field of hot melt adhesives. The high-temperature-resistant hot melt adhesive is prepared from the following raw materials in parts by weight: 25 to 35 parts of modified polyimide resin, 20 to 30 parts of modified benzoxazine resin, 8 to 12 parts of carboxyl-terminated nitrile rubber, 5 to 8 parts of C5 / C9 copolymerized petroleum resin, 3 to 5 parts of hydrophobic modified nano silicon dioxide, 1 to 2 parts of silicone powder, 0.5 to 1.0 part of antioxidant 1010, 0.3 to 0.8 part of zinc stearate and 0.05 to 0.1 part of tetrabutylammonium bromide. The high-temperature-resistant hot melt adhesive is scientific in raw material ratio, core resin is modified to improve heat resistance and compatibility, filler such as hydrophobic nano silicon dioxide is added to enhance performance, the preparation process is controllable, nitrogen protection is achieved in the whole process, moisture absorption is prevented through granulation and drying treatment, and a finished product is excellent in high-temperature resistance, good in comprehensive performance and good in storage stability.

This invention relates to the field of hot melt adhesive preparation technology, and more particularly to a method for preparing an insulating, heat-resistant, and flame-retardant hot melt adhesive for mechanical motors. The method includes determining the corresponding raw material type by obtaining the hydroxyl value index and isocyanate group index, thereby calculating the hydroxyl value deviation or isocyanate group deviation to determine the catalyst dosage adjustment range or the initial reaction temperature adjustment range; determining the reaction time for prepolymerization based on the adjusted catalyst dosage and initial reaction temperature; calculating the reaction uniformity and absorption peak intensity decay rate by real-time monitoring of the characteristic absorption peak intensity during the reaction; comparing the reaction uniformity with a preset reaction uniformity to determine whether to perform acceleration adjustment; and comparing the absorption peak intensity decay rate with a preset absorption peak decay rate to determine whether to extend the reaction time, ultimately preparing the hot melt adhesive. This invention effectively overcomes raw material batch fluctuations and process disturbances, significantly improving the consistency and overall performance of the hot melt adhesive.

The invention relates to the technical field of foaming product preparation, provides a foaming product with an invisible massage structure, and solves the technical defects of pressure concentration, use discomfort, uneven surface, limited application scene and infirm interlayer combination of the existing massage foaming product. In addition, the invention further provides a preparation method of the foaming product with the invisible massage structure, and the defects that an existing foaming product preparation process is uncontrollable, and precise forming and integrated stable combination of double-layer materials cannot be achieved are overcome. The foaming product comprises an upper layer and a lower layer which are integrally foamed and formed, the lower layer is provided with a massage structure protruding upwards, the upper layer wraps the massage structure, touch generated by the massage structure is buffered by the upper layer and then transmitted to the upper surface of the product, and therefore soft massage with the flat surface is achieved. The invention is widely applicable to the fields of shoes, sitting and lying appliances, sports protection and the like.

The invention relates to the technical field of resistance reduction, and particularly discloses a high-precision bionic resistance reduction structure preparation process, a resistance reduction material and a resistance reduction structure. According to the method, polyurethane acrylate, fluorine-containing acrylate, epoxy acrylate and an active diluting monomer are used as main raw materials of a resistance reducing material, the resistance reducing material is injected into a placoid scale structure groove of a transparent flexible silica gel mold, a UV curing mode is adopted firstly, so that a resistance reducing structure is formed preliminarily, and then the resistance reducing material is formed; the drag reduction material can be directly and preliminarily cured on the surface of the ship; and then thermal curing treatment is carried out in the later period, the drag reduction material is fully crosslinked in the thermal curing treatment process, and the hardness, peel strength and wear resistance of the drag reduction material are improved. The technical blank of spraying a three-dimensional structure on the surface of a ship is filled, high pattern precision is ensured, the integrity of the three-dimensional pattern can still be ensured after long-term use, and the resistance reduction structure has a long-acting resistance reduction effect.

The application belongs to the technical field of organic silicone adhesive, and discloses a single-component organic silicone hot bonding adhesive capable of being cured in segments, and a preparation method and application thereof. The preparation method is as follows: first, end-vinyl silicone oil, hexamethyl disilazane and fumed white carbon black are mixed, kneaded and ground to obtain a first base material; then, methyl MQ silicone resin, methyl-vinyl silicone rubber, hydrogen-containing silicone oil, inhibitor and diluent are mixed and dispersed to obtain a second base material; finally, tackifier and latent platinum catalyst are added. The single-component organic silicone hot bonding adhesive prepared by the application forms a hot bonding adhesive prepreg after initial curing, and has extremely low peeling force at normal temperature, is easy to peel off from a release film during use, and the adhesive surface is still flat and undamaged when the adhesive surface is pressed against the bonding surface. After the prepreg is hot-pressed during use, the cross-linking is complete, the bonding with the base material is tight, the peeling force is high, and the high strength required for long-term use can be achieved.

A foaming composition comprising a novel organic alcohol amine carbonate blowing agent and a polymer polyol, comprising; (I) 100 parts by weight of a polymer polyol comprising: 1) 55-75 wt% of a sucrose starting polyether polyol; 2) 15 to 25 wt% of aromatic polyester polyol; 3) 5 to 15 wt% of a sorbitol starting polyether polyol; 4) 3-7 wt% of toluenediamine starting polyether polyol; (II) 3.5-20 parts by weight of a catalyst, a foam stabilizer and a flame retardant; (III) 6 to 20 parts by weight of ethanol isopropanolamine and ethanol diisopropanolamine carbonate (AC) as a foaming agent. The composition is used for preparing spraying type polyurethane rigid foam.

The present invention discloses a packaging material and an electronic device module containing the same. The packaging material is prepared from a polyolefin composition, which includes a polyolefin resin and a bridging agent, and the bridging agent has a structure shown in the general formula (I): #imgabs0# wherein n1, n2, n3, n4, n5, n6, n7, and n8 are integers of 0 to 6, respectively. The bridging agent used in the packaging material of the present invention is a type of polysilsesquioxane with a three-dimensional structure and multiple isolated double bonds. The bridging agent can not only enable the polyolefin material to achieve sufficient crosslinking, but also overcome the technical problem in the prior art that the bridging agent has high viscosity and is easily precipitated from the packaging material to the surface.

The invention discloses a preparation method of a spherical solid ammonia CO2 adsorption material, which comprises the following steps: in a water-in-water emulsion template formed by dextran, polyethylene glycol and nano cellulose crystal, taking polyethyleneimine as a matrix, and then crosslinking and curing with ethylene glycol diglycidyl ether to obtain the spherical solid ammonia CO2 adsorption material. According to the invention, the polyethyleneimine is used as a matrix, and the polyethyleneimine has a large number of amino groups which are all effective CO2 adsorption sites; meanwhile, a water-in-water emulsion template formed by glucan, polyethylene glycol and nano cellulose crystals is adopted, the existence of a large amount of water in the emulsion template is beneficial to full swelling of the adsorption material in the synthesis process, and the interior of the adsorption material can be fully crosslinked, so that the adsorption material can be formed at a relatively low crosslinking agent concentration due to uniform crosslinking; therefore, the amino group density is high. The swelling rate of the adsorbing material obtained by the preparation method is 198-296%, so that the adsorbing material can be fully swelled in a humid state, and efficient adsorption of CO2 is realized.

The invention relates to a high-viscosity polymer coating and a preparation and use method thereof, and belongs to the field of polymer coatings, the coating comprises the following components: 60-80 parts of polymer resin, 15-25 parts of a waterproof filler, 3-8 parts of a waterproof additive, 5-10 parts of a diluent and 2-6 parts of a curing agent, high-solid-content resin is adopted, the addition of the diluent is reduced, and the mass ratio of a film-forming substance is greater than or equal to 85%; the preparation method comprises the steps of filler modification, raw material mixing, curing and the like. The application method sequentially comprises the steps of base layer cleaning, galling treatment, special prime coat brushing, carcass reinforcing material paving and surface coat brushing. The film forming compactness is improved through formula optimization, the adhesive force of the coating and a base layer is enhanced by combining base layer pretreatment and a matched construction technology, the phenomena of peeling and stripping / hollowing are effectively avoided, and the waterproof coating is excellent in waterproof performance, long in service life and suitable for waterproof engineering in the fields of buildings, building materials and the like.