147 results about "Thermal curing" patented technology

The invention discloses liquid crystal polyimide aerogel with excellent shape memory performance and a preparation method of the liquid crystal polyimide aerogel, and belongs to the field of polymer aerogel materials. According to the liquid crystal polyimide aerogel with the excellent shape memory performance, the shape fixing rate is larger than or equal to 99%, and the shape recovery rate is larger than or equal to 97%; the heat conductivity at the room temperature is larger than or equal to 0.09 W m <-1 > K <-1 >; specifically, liquid crystal diamine, flexible diamine, a liquid crystal dianhydride monomer and a thermal curing agent are subjected to a reaction and solvent replacement, and polyamide acid dry filaments are obtained; and forming an aqueous solution from the dry polyamide acid filaments, injecting the aqueous solution into a silica gel mold, carrying out directional freezing casting on a customized freezing circulating device with a copper plate at the top, and carrying out freeze drying, thermal imidization and curing after molding, so as to obtain the liquid crystal polyimide aerogel with excellent shape memory performance.

The invention discloses a graphene heat dissipation film and a preparation method thereof, and relates to the technical field of heat dissipation materials.The method comprises the steps that graphene powder and doped particles are mixed according to the mass fraction of 5-20%, deionized water is added to serve as a dispersion medium, 0.5-5% of a stripping auxiliary agent is added, treatment is conducted through high-speed shear dispersion and ultrasonic dispersion, and the graphene heat dissipation film is obtained. Uniform and stable modified graphene slurry is formed; coating the modified graphene slurry on a base material layer by layer according to a sequence from low thermal conductivity to high thermal conductivity, controlling the coating thickness by adopting a scraper or a spin coating process, and performing pre-drying treatment after coating each layer; the coated film is dried at the temperature of 80-200 DEG C, and the interlayer bonding strength is enhanced through chemical curing or thermocuring. Through innovative design of a modified graphene material and optimization of a multi-layer gradient structure, comprehensive improvement of thermal conductivity, mechanical properties and stability of the graphene heat dissipation film is realized.

The invention relates to the technical field of membrane separation, in particular to a preparation method of a pH-step-by-step thermocuring regulation sodium-magnesium separation nanofiltration membrane. The method comprises the following steps: (1) pre-treating a base membrane; (2) preparation and treatment of an aqueous phase solution: S1, preparing the aqueous phase solution according to mass fraction: sequentially adding 1.2%-1.6% of piperazine, 0.10%-0.14% of triaminopyrimidine and 0.14%-0.18% of polyethylene glycol into deionized water, and stirring until the piperazine, the triaminopyrimidine and the polyethylene glycol are completely dissolved to form the aqueous phase solution; s2, adjusting the pH value of the water-phase solution to 10-11 by using hydrochloric acid; s3, pouring the water-phase solution of which the pH is adjusted on the surface of the pretreated base membrane, standing, and blow-drying to form a uniform water-phase layer; (3) interfacial polymerization reaction: S1, preparing an oil phase solution: adding 0.10-0.14% of trimesoyl chloride into n-hexane, and performing ultrasonic treatment until the trimesoyl chloride is completely dissolved; s2, pouring the oil-phase solution on the surface of the base membrane subjected to water-phase treatment, and after reaction, pouring out redundant solution to form a polyamide separation layer, so as to obtain a membrane sheet; (4) performing a step-by-step thermocuring process; and (5) cleaning and storing.

The invention discloses polysiloxane as well as a preparation method and application thereof. The polysiloxane can significantly enhance the thermal stability, mechanical properties and chemical resistance of a cured film after high-temperature thermal curing of the heat-resistant resin, and enhance the adhesiveness of the heat-resistant resin and a base material.

The invention discloses a highly-transparent bio-based polyurethane fluoride-free antifouling coating and a preparation method and application thereof.The highly-transparent bio-based polyurethane fluoride-free antifouling coating is prepared by taking tannic acid (TA) as biological polyol, hexamethylene diisocyanate trimer (HDIT) as a cross-linking agent and monohydroxy polydimethylsiloxane (PDMS-OH) as a low-surface-tension material through thermocuring cross-linking, so that the highly-transparent bio-based polyurethane fluoride-free antifouling coating is prepared. And the tannic acid-based polyurethane fluoride-free antifouling coating is prepared. The coating shows up to 99% of optical transparency, has an ultraviolet shielding effect, and has excellent self-cleaning, anti-doodling and anti-artificial fingerprint pollution capabilities, and water, hexadecane, vegetable oil and pump oil easily slide off from the surface without traces. And even if the coating is repeatedly written and erased for 500 times, the coating still keeps excellent anti-graffiti performance. Due to the excellent adhesive force of the TA, the TA can be applied to various base materials. When the coating is bent and folded, the coating is still kept complete, the coating does not crack or peel off, and the coating has a wide application prospect.

The invention provides an epoxidized soybean oil-binary acid bio-based dynamic polymer, a preparation method thereof and a paper-based strain sensor packaged by the epoxidized soybean oil-binary acid bio-based dynamic polymer. The preparation method of the dynamic polymer comprises the following steps: (1) taking epoxidized soybean oil as an epoxy monomer, aliphatic dibasic acid as a flexible monomer and aromatic dibasic acid as a rigid monomer, and carrying out polymerization reaction in the presence of a transesterification catalyst to obtain a dynamic polymer prepolymer; the aliphatic binary acid comprises succinic acid, adipic acid and sebacic acid; (2) removing bubbles from the dynamic polymer prepolymer; and (3) carrying out thermal curing on the dynamic polymer prepolymer to obtain the epoxidized soybean oil-binary acid bio-based dynamic polymer. The epoxidized soybean oil-binary acid bio-based dynamic polymer has good mechanical properties and hydrophobicity, a paper-based strain sensor based on the epoxidized soybean oil-binary acid bio-based dynamic polymer also has good mechanical properties and hydrophobicity, and the sensor has certain application potential in the field of human motion monitoring.

The invention relates to the technical field of home decoration, and discloses a non-magnetic mobile base adhesive culture honor wall poster and a preparation method thereof, and the wall poster sequentially comprises a dynamic adsorption layer, a photocatalysis layer, a degradable base material layer and a water-soluble interface agent layer from top to bottom. The preparation method comprises the steps of raw material preparation, compounding of each layer and the like. According to the wall poster, the bio-based material (bamboo fiber / PLA / PBAT) is used as the base material layer to replace traditional petroleum-based PET, the release amount of VOCs is greatly reduced, the photocatalytic layer can decompose pollutants such as formaldehyde, the indoor air quality can be improved, the cycle index is increased to 300 or above through the gradient microsphere structure, and the replacement frequency is reduced. Compared with traditional coating and thermocuring, the electrostatic spraying and UV curing process is more energy-saving and emission-reducing, gradient arrangement of the microspheres is achieved through segmented electrostatic spraying, and the adsorption stability is improved. And by embedding the NFC chip, the product traceability is realized, the circular economy is supported, and the recycling rate is improved.

The invention relates to the technical field of epoxy resin, and discloses polysiloxane functionalized aluminum nitride modified epoxy resin, which is characterized in that carboxyl-containing polysiloxane functionalized aluminum nitride is used as a functionalized filler to fill and modify the epoxy resin, methyl tetrahydrophthalic anhydride is used as a curing agent, imidazole is used as an accelerant, and in the thermocuring process, the carboxyl-containing polysiloxane functionalized aluminum nitride modified epoxy resin is prepared. Carboxyl in a polysiloxane molecular chain grafted on the surface of the nano aluminum nitride reacts with an imidazole accelerant to generate imidazole carboxylate, an imidazole-carboxylic acid curing system is formed, the curing process of the epoxy resin can be accelerated, the nano aluminum nitride is uniformly dispersed in an epoxy resin matrix after being modified by the functionalized polysiloxane, the dispersity is good, and the curing effect is good. The heat conductivity coefficient and the thermal decomposition temperature of the epoxy resin are greatly improved, and the heat-conducting property and the heat-resisting property of the epoxy resin are enhanced.

The invention relates to a preparation method of supported porous carbon for catalyzing hydrosilylation reaction, which comprises the following steps: (S1) mixing thermoplastic phenolic resin, polyindole boric acid and a stabilizer, and heating to react to obtain modified phenolic resin; the mass ratio of the thermoplastic phenolic resin to the polyindole boric acid is 100: (15-25); (S2) dissolving the modified phenolic resin, a pore-foaming agent and a curing agent in a solvent, removing the solvent, and crushing to obtain solid particles; (S3) carrying out thermocuring, pre-oxidation, carbonization, activation and oxidation treatment on the solid particles in sequence to obtain oxidized porous carbon; (S4) modifying the oxidized porous carbon with vinyl siloxane to obtain vinyl siloxane modified porous carbon; and (S5) dipping the vinyl siloxane modified porous carbon in an alcoholic solution of platinum salt to obtain the supported porous carbon. The supported porous carbon prepared by the invention has excellent catalytic efficiency and good stability when being used for catalyzing hydrosilylation reaction, and can be recycled.

The invention discloses a preparation method of antifouling, oil-repellent and moisture-permeable cotton fibers and a fabric using the same, and relates to the technical field of fiber surface functionalization treatment. The method comprises the five steps of enzyme dewaxing, weak acid neutralization, perfluorosilane vapor deposition, thermocuring and moisture regaining and humidifying. The method comprises the following steps: firstly, mildly removing waxiness on the surface of the cotton fiber under the buffering of glycine and the assistance of ultrasonic waves by adopting the synergistic effect of lipase and acid cutting enzyme, and controlling the waxiness loss rate to be 0.8-1.2 wt%; then neutralizing the surface of the fiber through a weak acid bath containing citric acid and a silane coupling agent, and controlling the moisture content in cooperation with hot air drying. Carrying out perfluorodecyl / perfluorooctylsilane vapor deposition on the humidified fibers at low pressure, and introducing a trace amount of water vapor to induce Si-O-Si network construction; and the compactness and durability of the coating are further improved through two-stage thermocuring. The obtained fiber has high oil and water repellency and excellent moisture permeability.

The invention relates to an automatic coating device for a thermocuring insulating film. Comprising a lower film forming mechanism used for forming a cavity where an aluminum sheet needs to be placed on a lower film, an aluminum sheet feeding mechanism used for placing the aluminum sheet into the cavity of the lower film and packaging and cutting the aluminum sheet and an upper film to form a product, and a tool assembling and disassembling mechanism used for loading the product into a thermocuring tool or disassembling the product from the thermocuring tool. The thermocuring and cooling mechanism is used for thermocuring and cooling the product loaded in the thermocuring tool; the tool assembling and disassembling mechanism is used for assembling a thermocuring tool, the post-processing mechanism is used for cutting, detecting and discharging a product subjected to thermocuring, and the transferring mechanism is used for transferring the thermocuring tool between the tool assembling and disassembling mechanism and the thermocuring and cooling mechanism and transferring the product between the tool assembling and disassembling mechanism and the post-processing mechanism. The labor cost is reduced, and the labor intensity and the production cost are reduced; the production quality and the production efficiency are improved, and the applicability is wide.

The present invention relates to a thermosetting epoxy resin composition comprising a dihydrazide as curing agent, in combination with an accelerator of an imidazolium salt as curing agent, the molar ratio of curing agent to accelerator being 6-120. The compositions are characterized by good storage stability and low cure temperature. The epoxy resin composition is particularly suitable for use as a vehicle body adhesive.

Disclosed is a silicone-modified polyimide resin composition comprising a silicone-modified polyimide, a thermal curing agent, wherein the silicone-modified polyimide contains a repeating unit represented by the following general formula (I): in the general formula (I), Ar 1 is a tetravalent organic group having a benzene ring or alicyclic hydrocarbon structure, Ar 2 is a divalent organic group, R is independently selected from a methyl group or a phenyl group, and the thermal curing agent is an epoxy resin, an isocyanate, or a bisoxazoline compound. The silicone-modified polyimide resin composition obtained by the present application has excellent heat resistance, mechanical strength, and light transmittance.

A frame glue material, a display panel, and a manufacturing method thereof are disclosed. The frame glue material includes a photoinitiator, a thermal curing agent, and an epoxy acrylate resin, and a chemical structural formula of the epoxy acrylate resin is:wherein, R includes at least one of resorcinol, hydroquinone, or bisphenol A.

The invention discloses tubular pile maintenance equipment and a process thereof, and relates to the technical field of tubular pile maintenance, the tubular pile maintenance equipment comprises a maintenance box body, a heating mechanism is arranged on the outer side of the maintenance box body and is used for carrying out high-temperature heating treatment on a tubular pile body, and an upper top cover is arranged on the upper surface of the maintenance box body; a water storage tank capable of spraying and moisturizing the pipe pile body is arranged on the upper side of the middle part of the upper top cover; the heating mechanism comprises an exhaust frame, a first filter screen plate is arranged on the left side of the interior of the exhaust frame, and a fan is arranged in the middle of the exhaust frame. And a heating plate is arranged on the right side of the fan. The problems that in the maintenance process of the pipe pile, water spraying natural air drying maintenance or steam heating thermalization maintenance is mostly adopted, the mode can cause the pipe pile to be broken, cost is high, high-humidity and high-temperature maintenance is difficult to conduct, meanwhile, the pipe pile possibly shakes when placed, accurate positioning and moving cannot be achieved, and the maintenance efficiency is high are solved. And the problems of portable taking and placing are solved.

The application provides a packaging adhesive film and a photovoltaic module. The packaging adhesive film comprises a UV curing buffer layer and a thermal curing adhesive layer which are stacked in sequence, wherein the material of the UV curing buffer layer comprises a modified POE resin and a UV assistant crosslinking agent, the modified POE resin is grafted with a photoinitiator molecular fragment containing and / or a functional group, wherein "*" represents the connection position thereof in the photoinitiator molecular fragment. The pre-crosslinking degree gradually decreases in the UV curing buffer layer along the direction close to the thermal curing adhesive layer, thereby preventing the problem that the packaging adhesive film penetrates into the gap between the solder strip and the cell piece to form a false weld due to excessive flowability, avoiding the problem that the overall pre-crosslinking degree of the UV curing buffer layer is too large to cause hidden cracks on the cell piece during the laminating process, and preventing the problems of yellowing caused by the migration of the initiator and the precipitation of the assistant, and solving the problems of easy formation of false weld and occurrence of hidden cracks on the cell piece during the packaging of the HJT cell.

Provided is a mixture which has a long usable time in a manufacturing process, has little change in characteristics due to heating during bonded magnet molding, and has high mechanical strength even when a thermosetting resin is subjected to a curing reaction under low temperature conditions. A mixture containing an epoxy resin (A), metal element-containing particles (C), and a curing agent (D) having an imidazole structure, the curing agent (D) having an imidazole structure comprising a compound represented by formula (1) and / or a compound represented by formula (2). R1, R2, X, Y, Z, m and n are as described in the specification.

A resin sheet is made using a resin composition containing a thermosetting component (A) and a thermally conductive filler (C). The thermosetting component (A) contains a maleimide resin. A thermal diffusion rate of the thermally cured resin sheet is 1.0×10−6 m2 / s or more. When a cross section (P) of the resin sheet taken by cutting the resin sheet in a vertical direction to a surface of the resin sheet is observed in an area (P1), a condition represented by a numerical formula (F1) below is satisfied, the area (P1) being defined by a square whose sides are four times as large as a thickness of the resin sheet and including two surfaces of the resin sheet,0.25≤Ld / Lt≤1  (F1)where Ld is a vertical length of a filler particle having a largest cross-sectional diameter in the vertical direction of the thermally conductive filler (C), and Lt is a length of the resin sheet.

The present invention provides a curable composition that possesses tackiness and plastic deformability in a semi-cured state and excellent strength after thermal curing, a semi-cured product of the curable composition, a substrate coated with the semi-cured product, a laminate containing the curable composition, and a method for manufacturing the same. [Solution] The curable composition according to the present disclosure contains a monofunctional (meth)acrylate (A1) and a polyfunctional (meth)acrylate (A2), which each contain a linear aliphatic hydrocarbon group that may have an ether bond and / or ester bond between carbon atoms and may have an alicyclic ring with a heteroatom as a substituent. A photopolymerization initiator (B), an epoxy resin (C), a thermosetting agent (D), and a tackifier (E) containing a terpene phenol resin.

An apparatus for thermal curing of a lens-forming material contained in a plurality of closed contact lens molds, comprises a curing oven comprising a curing chamber for accommodating a stack of curing trays, with each curing tray of the stack arranged at a respective predetermined vertical level. The curing oven further comprises a supply channel and a baffle separating the supply channel from the curing chamber, the baffle comprising a plurality of supply holes. At a chamber inlet, the curing chamber is fluidly connected with the supply channel via the supply holes only, wherein the plurality of supply holes of the baffle are arranged along a plurality of horizontally extending rows, with one said row of the plurality of rows being arranged at an intermediate vertical level between each adjacent ones of the said predetermined vertical levels at which the curing trays of the stack are to be arranged.

The present invention belongs to the technical field of composite material forming. The present invention provides a wind power generation blade and a preparation method thereof, wherein the fiber yarn is sequentially subjected to yarn laying, yarn threading, tension application, tension detection, resin compounding, resin dipping, product forming, radiation curing, thermal curing, cooling, traction, cutting, online detection, winding, and unwinding; the thermal curing method is contact heating, radiation or convection, and the thermal curing is gradient heating or isothermal heating, and the gradient heating is high temperature first and then low temperature; the traction speed is 2 to 5 m / min. The preparation method of the present invention realizes rapid prototyping of the product through a dual curing process combining ultraviolet radiation curing and thermal curing, perfectly combining the advantages of rapid prototyping of radiation curing and excellent mechanical properties of thermal curing, and effectively improving production efficiency; the straightness of the wind power generation blade is good, the product is cured at low temperature, there is no product deformation caused by uneven stress, and the product yield is greatly improved.

The application discloses a preparation of a thermosetting benzocyclobutene-based MQ silicone resin and application thereof in preparing a glass fiber composite material, and comprises the following steps: stirring and reacting an organic silicon source, a solvent, a catalyst and water at 30-50 DEG C for 30-90 min to form a mixed solution A; uniformly mixing divinylsiloxane-benzocyclobutene and the solvent to form a mixed solution B, adding the mixed solution B into the mixed solution A, and heating to 65-80 DEG C for 1-3 h; adding an organic phase after the reaction is completed, washing with water for several times until neutral, removing the solvent by vacuum distillation, and vacuum drying; and obtaining the thermosetting benzocyclobutene-based MQ silicone resin. The thermosetting benzocyclobutene-based MQ silicone resin has excellent dielectric properties, mechanical properties, heat resistance and chemical stability, and the cured resin formed by thermal crosslinking has the properties of low dielectric, high tensile strength, high bending strength, chemical stability and heat resistance.

The invention discloses an acidic thermosensitive resin and a pre-coated resin copper foil, and belongs to the technical field of PCB board preparation. The acidic thermosensitive resin comprises the following components: A: acidic resin, 15-60 parts by weight; B: epoxy resin, 10-50 parts by weight; C: inorganic nanofiller with low dielectric constant, 25-55 parts by weight; the total weight of components A-C is 100 parts by weight; in addition, it also comprises D: auxiliary agent, the auxiliary agent comprises an epoxy thermosetting catalyst, and the amount of the epoxy thermosetting catalyst is 0.1-5% of the total weight of components A-C; the acidic resin comprises a fluorine-containing acidic resin prepared from a fluorine-containing alcohol or a fluorine-containing phenol with a fluorine mass ratio greater than 30% as a raw material. The peeling force of the resin coating on the copper foil is greater than 5N / 25mm; the D coating on the pre-coated resin copper foil after heat treatment k <3.5, D f <0.02, CTE<40ppm.

A light-cured anti-slip structure includes an anti-slip layer fixed onto a substrate surface. The anti-slip layer is composed of the light-curing composite, wherein the light-curing composite includes 50 wt % to 100 wt % of photopolymer, 0.5 wt % to 20 wt % of photoinitiator, 5 wt % to 50 wt % of thermosetting polymer, less than or equal to 5 wt % of thermal curing initiator, which are mixed. The photoinitiator receives light energy to trigger a light-curing reaction of the photopolymer. Simultaneously the photoinitiator releases heat to activate the thermal curing initiator, the thermal curing initiator induces a curing reaction of the thermosetting polymer to form the anti-slip layer. The light-cured anti-slip structure provided by the present invention could be quickly cured on the substrate surface, and the manufacturing time and the cost of material could be significantly reduced. A manufacturing method of a light-cured anti-slip structure is provided as well.

In reaction products obtained by condensation reactions of phenols, diamines, and formaldehyde, the mass loss during thermal curing is reduced. [Solution] The reaction product according to the embodiment includes a first product of formula (1) and a second product of formula (2), wherein the peak area of ​​the second product is 5-15% of the total peak area of ​​the reaction product by HPLC, and the combined peak area of ​​the first and second products is 65-75%. JPEG2026059928000018.jpg80141

The present invention provides a resin sheet formed from a resin composition containing (A) a thermosetting component and (C) a thermally conductive filler, wherein the (A) thermosetting component contains a maleimide resin, and the thermal diffusivity of the resin sheet after thermal curing is 1.0×10 ‑6 m 2 / s or more, and when observing a region (P1) in a cross section (P) of the resin sheet, the following mathematical formula (F1) is satisfied: the cross section (P) is a cross section taken along a direction perpendicular to the surface of the resin sheet; the region (P1) is a region enclosed by a square having a side length four times the thickness of the resin sheet and including both surfaces of the resin sheet; 0.25 ≤ Ld / Lt ≤ 1... (F1). Ld: The length of the thermally conductive filler (C) having the largest cross-sectional diameter in the perpendicular direction in the perpendicular direction; Lt: The length of the resin sheet in the perpendicular direction.

The invention discloses a method for functional finishing of polyurethane imitation leather coating durability based on nanoparticles, which solves the problems of difficult control of polymerization process and complicated operation when functional finishing agent is grafted on polyurethane body, and poor functional durability when functional finishing agent is blended with polyurethane or coated on polyurethane surface. The method mainly comprises spraying finishing liquid with uniform nanoparticle dispersion onto the surface of polyurethane coating, driving the fusion of bottom layer polyurethane and surface layer nanoparticles through preheating treatment, and then driving polyurethane chain segments to approach each other through heat curing process, and at the same time firmly fixing nanoparticles in polyurethane imitation leather coating in full or semi-encapsulation mode, so as to realize the functional durability of polyurethane imitation leather coating.

The utility model belongs to the technical field of release film curing devices, and discloses a thermocuring device for release film processing, which comprises a shell part, a conveying channel is formed in the shell part, two air guide parts are mounted on the shell part, each air guide part comprises a hot air guide unit and a heat exchange tube, and the hot air guide units are communicated with the heat exchange tubes. A first gas conveying channel for conveying hot gas flow is formed in the hot gas guiding unit, and a second gas conveying channel is formed in the heat exchange pipe. A heat exchange part is arranged between part of the heat exchange pipes and the first gas conveying channel in a sleeved mode, a third conveying channel is formed in the heat exchange part, and air in the third conveying channel exchanges heat with gas in the heat exchange pipes. The heat exchange piece guides external air to flow, so that the external air exchanges heat with hot air in the heat exchange pipe, and the hot air is conveyed back into the first air conveying channel, so that the device can recycle the hot air, reduce heat loss, improve the thermocuring efficiency of the release film and reduce the use cost of the device.

The application relates to the technical field of layered products, and discloses a high-elasticity weather-resistant composite waterproof roll material and a preparation method thereof. The roll material is a layered product, and sequentially comprises an upper reinforcing layer, a core layer and a lower reinforcing layer from top to bottom. The core layer is prepared from a bio-based polyurethane prepolymer prepared by reacting a microbial fermentation source long-chain polyester diol with an aliphatic diisocyanate, and is formed by thermal curing in cooperation with a chain extender, a catalyst and inorganic fillers. The long-chain polyester diol is obtained by polycondensation of a hydroxyl fatty acid monomer with a carbon chain length of ten to eighteen, and does not contain a double bond structure in the molecular chain. The application eliminates weak sites of photo-oxidative chain scission in the chain segment from the root of the molecular structure, blocks a chain scission path caused by ultraviolet rays, and maintains the elastic structure integrity of the roll material under long-term illumination.

The invention belongs to the technical field of transmission pipe production, and particularly relates to a low-temperature medical transmission pipe and a preparation method thereof, and the preparation method comprises five steps of mixing, forming, activating, coating and drying. The low-temperature composite organic phase change energy storage material is used as a coating liquid to coat the surface of a crude product of the transmission tube, and the prepared transmission tube is relatively stable in thermal performance, non-toxic and capable of being used for low-temperature transmission of medicines. And the preparation scheme is low in cost, simple in preparation process and convenient to operate, overcomes material loss caused by thermocuring, is suitable for batch production, and has a great application prospect in low-temperature transmission of medicine preparation.