266results about How to "Low shrinkage" patented technology

The invention discloses a liquid crystal compound, a liquid crystal composition and a phase difference film, relates to the technical field of liquid crystal display, and aims to solve the problems of poor alignment order degree, low n value and low crosslinking completion degree in an existing liquid crystal system. The structural general formula (I) of the liquid crystal compound is set, and the liquid crystal compound is applied to the phase difference film. According to the liquid crystal compound, a long liquid crystal main chain is adopted, so that liquid crystal molecules are arranged more orderly, dense chromophoric group arrangement is achieved, Van der Waals force and hydrogen-bond interaction among the liquid crystal molecules are improved, the alignment order degree and the n value are improved, and the purposes of improving dispersion, lowering the manufacturing cost, lowering the film thickness requirement and improving the crosslinking completion degree are achieved.

The invention relates to an anti-wrinkle and firming composition as well as a preparation method and application thereof. The anti-wrinkle and firming composition comprises the following components in parts by mass: 0.01-10 parts of composite polypeptide, 0.01-5 parts of recombinant collagen and 0.01-20 parts of amino acid or a derivative thereof, the composite polypeptide comprises acetyl peptide, palmitoyl peptide and carnosine. The brand-new anti-wrinkle and firming composition is developed through multi-dimensional formula design, acetyl peptide, palmitoyl peptide, carnosine and recombinant collagen are compounded, amino acid or amino acid derivatives are supplemented, the mutual synergistic effect is achieved, and the anti-wrinkle and firming purposes are achieved.

The invention discloses nano ettringite particle reinforced aramid nanofiber aerogel as well as a preparation method and application thereof, and belongs to the technical field of aerogel. The preparation method provided by the invention comprises the following steps: dissolving a calcium source, an aluminum source and sulfate in water, adding a first surfactant, adjusting the pH value to 9-12, stirring for reaction, and after the reaction is finished, washing a solid product to be neutral to obtain nano ettringite particles; uniformly stirring and mixing the nano ettringite particles, para-aramid nanofibers, a second surfactant and a cross-linking agent in water to obtain an ettringite / aramid nanofiber dispersion liquid; the ettringite / aramid nanofiber dispersion liquid is sequentially subjected to concentration, directional freezing and freeze drying, and the ettringite / aramid nanofiber composite material is obtained. The preparation method disclosed by the invention is simple, the raw materials are easy to obtain, and the obtained nano ettringite particle reinforced aramid nanofiber aerogel has relatively high mechanical strength and thermal stability.

The utility model discloses a fabric and shoes, the fabric at least comprises a first knitting area and a second knitting area, the first knitting area is formed by interweaving warp yarns and weft yarns according to weft backed weave, and the second knitting area is formed by interweaving warp yarns and weft yarns according to single-layer change warp rip weave; the weft yarns of the surface-layer texture of the first weaving area are surface-layer weft yarns, the weft yarns of the inner-layer texture of the first weaving area are inner-layer weft yarns, and the shrinkage rate of the surface-layer weft yarns is smaller than that of the inner-layer weft yarns. The shrinkage rate of the surface weft yarns of the weft backed weave is smaller than that of the lining weft yarns, and due to the fact that the shrinkage rate of the surface weft yarns is low and the shrinkage rate of the lining weft yarns is high, the shrinkage rate of the lining weft yarns is large and the shrinkage rate of the surface weft yarns is small after the fabric is subjected to high-temperature setting, so that the surface weft yarns are longer than the lining weft yarns and are forced to bow up; after the weft yarns on the surface layer protrude, the fabric shows a three-dimensional effect.

The invention discloses a master batch with a food fresh-keeping function. The master batch comprises the following components: 40-80 parts of PE resin; 5 to 30 parts of a nano composite antibacterial agent; 0.1 to 5 parts of a surfactant; 2-10 parts of a polyolefin elastomer; 5-25 parts of an organic gas adsorption material; 5-20 parts of a microporous modified atmosphere material; 1-25 parts of an antifogging agent; 0.1 to 10 parts of a lubricant; 0.1-5 parts of a dispersant; 0.1 to 1 part of an antioxidant; 0.1 to 3 parts of absolute ethyl alcohol; and 80 to 300 parts of ultrapure water. The master batch with the food fresh-keeping function has a broad-spectrum antibacterial effect, can reduce the rotting rate, the weight loss rate and the loss rate of fruits and vegetables in the production circulation link, adsorbs organic gas generated by respiration of the fruits and the vegetables, spontaneously adjusts the gas concentration content, and prolongs the fresh-keeping time and the shelf life of the fruits and the vegetables.

The invention belongs to the technical field of grouting materials, and particularly relates to a graphene modified ternary composite ultrafast curing grouting material and a preparation method thereof. The technical scheme is as follows: the graphene modified ternary composite ultrafast curing grouting material comprises the following components: a main agent and a curing agent in a weight ratio of 4: 1, wherein the main agent is prepared from the following components in parts by weight: 30 to 33 parts of modified nano calcium silicate, 0.8 to 0.9 part of functionalized graphene, 3.8 to 4.2 parts of intelligent response type expansion factors, 2.5 to 3.0 parts of nanoscale molecular sieves and 18 to 20 parts of surface modified composite mineral admixtures; the main agent is prepared by adopting a special dispersion medium; the curing agent is prepared from the following components in parts by weight: 1.5 to 1.8 parts of amino-functionalized carbon nanotubes, 9 to 10 parts of an active site initiator, 4.5 to 5.0 parts of an interface coupling agent composite system and 2.5 to 2.8 parts of an intelligent regulation and control aid; the curing agent is prepared by a special carrier. The invention provides a graphene modified ternary composite ultrafast curing grouting material and a preparation method thereof.

The invention relates to the technical field of fibers, in particular to a PTT / PA eccentric core-sheath composite fiber and a preparation method thereof. The comprehensive performance of the fiber is remarkably improved through eccentric structure design and introduction of an alkyl chain into a PA sheath layer to modify PA. The composite fiber is composed of a PTT core layer and a PA sheath layer, the sheath layer contains alkyl chain modified PA, and the fiber shows excellent breaking strength, curling performance and thermal stability. The eccentric structure effectively disperses stress, brittle fracture is avoided, meanwhile, the alkyl chain modified PA enhances the flexibility and interface bonding force of a molecular chain, and the dimensional stability and thermal stability of the fiber are improved. The invention is suitable for the fields of clothing, home textiles and high-temperature industrial fibers, and meets the requirements of high strength, high elasticity and high-temperature stability.

The preparation method comprises the following steps: preparing PET non-woven fabric raw paper, preparing a nano-zinc oxide particle dispersion liquid, dipping the PET non-woven fabric raw paper in a solution, carrying out heat treatment to form a functional PET non-woven fabric, preparing a functional alkenyl ionic liquid, carrying out heat treatment to form a PET non-woven fabric, and carrying out heat treatment to form the PET reinforced bi-crosslinked polyionic liquid composite solid electrolyte. Adding a cross-linking agent, a lithium salt, a plasticizer and a photoinitiator to prepare an electrolyte precursor solution; the functional PET non-woven fabric is placed in the electrolyte precursor solution, standing and dipping are carried out under the vacuum condition, then thermal polymerization and photopolymerization are carried out, and the solid electrolyte is prepared and applied to the solid polymer lithium ion battery; the zinc oxide particles are compounded into the PET non-woven fabric to form the non-woven fabric which is thin in thickness, high in tensile strength and appropriate in porosity, and the non-woven fabric is cross-linked with the functionalized alkenyl ionic liquid and the electrolyte precursor solution step by step, so that the ionic conductivity, the electrochemical window and the thermal stability of the solid electrolyte and the safety performance of the battery in use are improved.

The invention discloses a preparation method of a high-purity corundum crucible for high-temperature alloy smelting, belongs to the technical field of precision casting refractory material forming preparation, and aims to solve the problems that an Al2O3 crucible is easily eroded by high-temperature alloy, impurities are generated during high-temperature alloy smelting, and the Al2O3 crucible is difficult to be suitable for high-temperature alloy smelting. According to the technical key points, 60%-70% by mass of aluminum oxide Al2O3 powder and 30%-40% by mass of silicon oxide SiO2 powder are added into a ball milling tank to be subjected to ball milling treatment, the aluminum oxide Al2O3 powder comprises fine powder mixed powder with the particle size being 5-50 micrometers, medium powder mixed powder with the particle size being 50-300 micrometers and coarse powder mixed powder with the particle size being 0.4-0.5 mm, and the coarse powder mixed powder is mixed with the medium powder mixed powder with the particle size being 2-5 micrometers. A binder polyvinyl alcohol (PVA) solution is added into the mixed powder for granulation operation, after the mixed material is aged, the mixed material is pressed in a cold isostatic pressing mode, a crucible preformed blank is obtained and sintered at different temperatures after being dried, and the crucible is obtained. The method has the effect that the sintered high-purity corundum crucible has excellent high temperature resistance and thermal stability at the same time.

The invention relates to the field of C09J163 / 00, in particular to a fast-curing epoxy resin adhesive and a preparation method and application thereof. The fast-curing epoxy resin adhesive is composed of a component A and a component B, the component A at least comprises the following preparation raw materials: epoxy resin, a filler A, a diluent, a flexibilizer and a coupling agent A; the component B at least comprises the following preparation raw materials: a curing agent, a filler B, an accelerant and a coupling agent B; the curing agent is a combination of a polythiol curing agent and at least one of a phenolic aldehyde amine curing agent and a polyamide curing agent, by optimizing a formula system, the operable time (pot life), the curing speed and the hardness after curing of the product are effectively balanced, the product is rapidly cured within the proper operable time, the hardness after curing can be guaranteed, and the service life of the product is prolonged. And the actual application requirements of pipeline cold welding emergency repair are met.

The invention discloses a method for manufacturing an injection-molded receiver net plastic part, which comprises the following steps of: heating and melting a polymer melt through a feeding structure, injecting the polymer melt into a mold to obtain the receiver net plastic part, and quickly cooling a sound outlet hole of the receiver net plastic part by adopting preset high-temperature circulating liquid cooling in a first cooling stage through dynamic cooling treatment; the rigidity of the micropore area is effectively improved, the problem of micropore structure deformation caused by non-uniform cooling is reduced, polymer melt in the sound outlet hole area can be cured in time through rapid cooling, excessive shrinkage is avoided, and therefore the total shrinkage rate of the sound outlet hole is remarkably reduced; and in the second cooling stage, cold air is sprayed at the preset low temperature to slowly cool the outer surface of the receiver net plastic part, the toughness of the outer layer structure is enhanced, the differentiated cooling modes are accurately regulated and controlled according to different requirements of the inner and outer structures of the receiver net plastic part, uniform distribution of the shrinkage rate in the whole cooling process is achieved, and the product quality is improved. The problem that the overall shrinkage rate is too large due to a traditional cooling mode is effectively solved.

The invention relates to the technical field of porous material preparation processes, in particular to a preparation method of light low-thermal-conductivity lutetium silicate aerogel, which comprises the following steps: preparing composite sol; preparing and aging wet gel; drying the gel; preparing the aerogel; the lutetium silicate aerogel is prepared by combining in-situ sol-gel with a supercritical drying process, and the lutetium silicate aerogel has relatively high porosity, can be in a light, crack-free and complete block shape, and can be used for near-net size forming; the method is simple to operate, can realize fluidized production, and is easy to industrialize; the lutetium silicate ceramic aerogel prepared by adopting an in-situ synthesis mode has higher porosity, better thermal stability and lower thermal conductivity, and can tolerate the extreme temperature of 1500 DEG C.

The invention provides a polymer alloy material, a preparation method thereof and a flow cell panel frame, and belongs to the technical field of high polymer materials. The polymer alloy material comprises the following components: 25-80% of polyolefin, 10-20% of engineering plastic, 1-5% of a compatilizer, 5-50% of an inorganic filler and 0.1-5% of an auxiliary agent. Wherein the engineering plastic is selected from one or more of a styrene methyl methacrylate copolymer, a styrene-butadiene methyl methacrylate copolymer, polycarbonate, polyphenyl ether, polyphenylene sulfide, a styrene-maleic anhydride copolymer or a styrene-acrylonitrile copolymer. The polymer alloy material forms a bicontinuous phase structure with'sea-sea 'microscopic dispersion characteristic and tight interface bonding, can simultaneously have the characteristics of excellent heat resistance, corrosion resistance, high flow, low shrinkage, high modulus and the like, and makes up for the defect of insufficient performance of the existing liquid flow cell panel frame plate PP material.

The invention relates to a die-casting forming method for improving the density of a casting, belongs to the technical field of aluminum alloy casting, and solves the problems of high porosity, low density and low mechanical property of an aluminum alloy thick-wall die casting in the prior art. A die-casting forming method for improving the density of a casting comprises the following steps that firstly, an aluminum alloy metal raw material is added into a preheated smelting furnace, melting and heating are conducted, aluminum alloy liquid is obtained, and a refining modifier is added and stirred; 2, degassing treatment is conducted on the aluminum alloy liquid, and surface scum is removed after standing; 3, a die-casting die is preheated, and a layer of release agent is sprayed on the die-casting die; 4, the molten aluminum alloy is cooled and poured into a pouring gate of the die-casting die, the thickness of the pouring gate is 8-12 mm, and the molten aluminum alloy is slowly injected into a cavity of the die-casting die through an injection punch; and 5, the aluminum alloy die casting is taken out, the die casting is placed in a water tank to be quenched, and the high-density die casting is obtained. And preparation of the high-density aluminum alloy thick-wall die casting is achieved.

The invention discloses a polypropylene composition as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. A styrene-ethylene-butylene-styrene block copolymer and an ethylene-butylene copolymer are introduced into a polypropylene resin matrix for compounding to form a resin system; meanwhile, the silicate filler with specific whiteness and the sorbitol anti-reflection agent are selected for compounding, and under the synergistic effect of all the components, the product not only can realize higher light transmittance, but also is low in shrinkage rate, good in low-temperature toughness and excellent in processability and use performance.

The invention relates to the technical field of epoxy resin, in particular to an epoxy resin composition for high-strength carbon fiber winding and a preparation method thereof.The preparation method of the epoxy resin composition comprises the steps that S1, modified epoxy resin, a compatilizer, a retarder, a defoaming agent and nano filler are added into a reaction kettle and mixed and stirred, and a mixture A is obtained; s2, a composite curing agent is added into the mixture A, stirring and mixing are conducted, and the epoxy resin composition is obtained and has the advantages of being appropriate in viscosity, good in heat resistance, excellent in impact resistance, large in bending strength, small in volume shrinkage rate in the curing process, moderate in gelation time and capable of being wound with carbon fibers conveniently to prepare the composite material.

The invention provides a mold with a hot spot air cooling heat dissipation structure, and relates to the technical field of die-casting molds, the mold comprises a mold, a cooling runner plate, a first air inlet pipe, a first air outlet pipe and a hot spot heat dissipation assembly; the mold is provided with a forming cavity and a containing cavity, the forming cavity is used for forming a product, the cooling runner plate is attached to and connected with the inner wall of the containing cavity, and heat of the product in the forming cavity is transferred to the cooling runner plate; the cooling runner plate is provided with a cooling cavity, and the first air inlet pipe and the first air outlet pipe are both communicated with the cooling cavity of the cooling runner plate; each hot spot heat dissipation assembly comprises a hot spot heat dissipation cylinder, the hot spot heat dissipation cylinders are communicated with a cooling cavity of the cooling runner plate, and the multiple hot spot heat dissipation assemblies are located in a hot spot area of the mold. According to the mold, the hot spot area of the mold can be cooled, and the machining quality of products is improved.

The invention relates to the technical field of high-temperature alloys, and particularly discloses a smelting preparation process of a large-specification bar capable of resisting the temperature of 800 DEG C. The invention discloses a smelting preparation process of a large-specification bar resistant to the temperature of 800 DEG C. The smelting preparation process specifically comprises the following steps of vacuum induction smelting, annealing, first-time vacuum consumable smelting, electrode forging, second-time vacuum consumable smelting, consumable ingot homogenizing annealing and bar forging in sequence. According to the method, the large-size bar resistant to the temperature of 800 DEG C is prepared through the process, the bar quality is improved, the prepared large-size bar has excellent tensile property and high temperature resistance, the occurrence probability of black spots and white spots is reduced, and meanwhile homogenization control over bar components is achieved.

The invention discloses a low-retraction optical cable and a preparation method thereof, and belongs to the technical field of optical cable preparation, the low-retraction optical cable comprises a reinforcing core, and a plurality of optical units are twisted on the periphery of the reinforcing core; and the bonding layer is arranged between the reinforcing core and the optical unit, the bonding layer at least partially bonds the contact surfaces of the optical unit and the reinforcing core, and a plurality of bonding points are formed on the optical unit and the reinforcing core along the axis of the optical cable. According to the low-retraction optical cable, the bonding layer is arranged between the reinforcing core and the optical unit, a plurality of bonding points arranged in the axial direction are formed between the reinforcing core and the optical unit through the bonding layer, and due to the fact that the reinforcing core has low shrinkage, and the bonding mode of the reinforcing core and the optical unit enables a sleeve of the optical unit to be bonded and fixed by the reinforcing core; therefore, the shrinkage of the sleeve of the optical unit is avoided, and the exposure of the optical fiber is avoided; meanwhile, the intermittent bonding mode of the optical unit and the reinforcing core prevents the optical unit and the reinforcing core from being bonded too tightly and facilitates the branching of the optical unit.

The invention relates to the field of polyurethane resin, and particularly discloses 3D printing light-cured polyurethane resin as well as a preparation method and application thereof. The 3D printing light-cured polyurethane resin is prepared from the following raw materials in parts by weight: 60-80 parts of a polyurethane acrylate prepolymer, 15-25 parts of a diluting monomer, 8-12 parts of a dispersing filler, 6-8 parts of a photoinitiator and 3-5 parts of a stabilizer, the polyurethane acrylate prepolymer is prepared from aliphatic diisocyanate, trimethylolpropane diallyl ether, dipentaerythritol hexaacrylate, o-phenyl phenoxyethyl acrylate and a catalyst, and the polyurethane acrylate prepolymer is prepared from the aliphatic diisocyanate, the trimethylolpropane diallyl ether, the dipentaerythritol hexaacrylate, the o-phenyl phenoxyethyl acrylate and the catalyst; the polyurethane resin prepared by the invention has relatively good flexibility and elasticity, low shrinkage rate and low possibility of deformation, and can be applied to products with complex structures and high dimensional requirements, such as soles and underwear mold cups prepared by 3D printing.

The invention provides a lithium ion battery, which comprises a battery cell and an aluminum plastic film wrapping the battery cell, the battery cell comprises a positive pole piece, an isolation film, a negative pole piece and an electrolyte, the shrinkage rate of the isolation film is Y%, the aluminum plastic film comprises a polypropylene film, an aluminum foil and a composite nylon layer which are arranged in sequence, nano-metal is distributed in the composite nylon layer, the particle size of the nano-metal is 35-75nm, and the diameter of the nano-metal is 20-30nm. The addition amount of the nano metal in the composite nylon layer is Zwt%, and Y and Z meet the relation that Y / Z is larger than or equal to 0.18 and smaller than or equal to 1.45. According to the lithium ion battery, chemical heat generated by temperature rise in the battery cell can be rapidly exported, temperature rise in the battery cell can be delayed, and the passing rate of a hot box can be increased.

The invention belongs to the technical field of plastic alloy materials, and particularly relates to a multifunctional PA6 / ASA alloy material and a preparation method thereof.The preparation method comprises the steps that a proper biomass-based porous silicon carbon material is selected for treatment; weighing the PA resin, the AS resin and the compatilizer, putting into a stirring pot, and uniformly stirring; adding a wetting agent into the stirring pot, and uniformly stirring; adding a processing aid, toughened acrylic rubber powder and the treated biomass-based porous silicon carbon material into a stirring pot, uniformly stirring at a high speed, and adding the mixed material into a main feeding weightlessness scale; and setting the blanking amount of the weightlessness scale to be 30Kg / h, setting the rotating speed of a screw rod to be 420r / min, starting auxiliary equipment, and carrying out granulation production. The method is superior to a method for filling the PA6 / ASA material with inorganic minerals in special microcosmic shapes and adding a large number of functional auxiliaries, and light weight, noise reduction, low shrinkage, wear resistance, highlight, weather resistance and high temperature resistance can be achieved in the state that a single filler is added.

The invention relates to a hydrated borate micromolecule with a boron-nitrogen coordination bond, a derivative resin material and a preparation method of the hydrated borate micromolecule. The preparation method comprises the following steps: S1, synthesizing boron-nitrogen coordination micromolecules: dissolving and reacting boric acid, a derivative thereof and a polyfunctional group amine compound at room temperature through a solution reaction to obtain the boron-nitrogen coordination micromolecules; the borate micromolecule NCBW-X with intramolecular boron and nitrogen coordination is formed; s2, the NCBW-X micromolecule can be used for curing epoxy resin and synthesizing materials such as phenolic resin through end-NH2 and end-OH on two sides, the NCBW-X improves the mechanical property of each system through a rigid eight-membered ring, boron-nitrogen coordination of the NCBW-X can generate hydration, the environmental endurance is improved on the premise of retaining the original dynamic nature of boric acid ester of the NCBW-X, and the service life of the NCBW-X micromolecule is prolonged. Meanwhile, due to the dynamic reversibility of the NCBW-X, the NCBW-X is used for curing epoxy resin, and materials such as phenolic resin and the like are improved to a certain extent in the aspects of self-repairing and recycling.

The hardening liquid for the PMMA base material comprises a bifunctional polyurethane acrylate oligomer, a hexa-functional polyurethane acrylate oligomer and the like, the hardening liquid is coated on the PMMA base material to form an optical film, the hardening liquid and the PMMA base material have good adhesive force, and hardness, low reflectivity and low warpage are considered.

The invention discloses a method for post-root canal therapy resin closure retreatment in a medullary cavity, and relates to the technical field of root canal therapy, and the method comprises the following steps: S1, pre-operation sampling; s2, removing the restoration and other materials: removing the restoration on the surface of the dental crown and the resin sealing material in the medullary cavity by using a material removal technology and a tool, wherein the material removal technology and the tool comprise a grinding device with a sensor or a laser technology; s3, re-cleaning and disinfecting the root canal: after cleaning the root canal, using a root canal disinfection drug added with nano-silver particles, and mixing the nano-silver particles with traditional disinfection drugs such as calcium hydroxide paste; s4, filling and re-treating: blending the color of the resin by using a computer color matching technology before filling the medullary cavity; the system further comprises an intelligent design monitoring platform. According to the invention, a grinding device with a sensor or a laser technology is adopted, so that the damage to tooth tissues, especially key parts, is remarkably reduced, and the treatment safety and accuracy are improved.

The invention relates to the technical field of epoxy adhesives, in particular to a room-temperature-curing high-temperature-resistant heat-conducting epoxy adhesive and a preparation method thereof. Comprising a component A and a component B. The component A comprises, by weight, 60-135 parts of epoxy resin, 10-30 parts of a flexibilizer, 30-85 parts of a filler and 2-15 parts of an auxiliary agent, and the component B comprises, by weight, 40-90 parts of an amine curing agent, 10-30 parts of high-temperature-resistant resin, 30-60 parts of a filler and 2-12 parts of an additive. The epoxy resin comprises bisphenol A epoxy resin, novolac epoxy resin, polyurethane modified resin and multifunctional epoxy resin. The product has good mechanical properties and excellent temperature resistance, and the toughening agent and the resin powder are reasonably matched to ensure that the product has excellent impact resistance and temperature resistance. A plurality of amine curing agents are reasonably matched, so that the product can be cured at room temperature and used at high temperature, and meanwhile, the temperature resistance of the product is further improved by adding the high-temperature-resistant resin.

The invention discloses a polyimide polymer as well as a preparation method and application thereof, and the preparation method comprises the following steps: carrying out condensation polymerization on dianhydride and diamine, and then carrying out crosslinking, gel aging, solvent replacement and supercritical drying to obtain a polyimide microporous foam material. The dianhydride disclosed by the invention is a commercial product; the diamine comprises novel diphenylmethylene fluorene-based diamine prepared by a two-step method, and other diamines are commercial products; the preparation route of the polyimide microporous foam is simple, and the synthesis method has universality. The polymer chain rigidity of the polyimide microporous foam is moderate, the shrinkage rate is as low as 7.7%, the specific surface area exceeds 670 m < 2 > g <-1 >, the glass-transition temperature reaches 376 DEG C, the polyimide microporous foam has excellent thermal properties, and the thermal conductivity at 150 DEG C is as low as 41.5 mW m <-1 > K <-1 >.

The invention belongs to the technical field of photoresist materials, and particularly relates to an etching-resistant ArF photoresist and a preparation method thereof. The etching-resistant ArF photoresist is prepared from the following raw materials in parts by weight: 90 to 100 parts of film-forming resin, 5 to 15 parts of a photoacid generator, 0.5 to 2 parts of organic alkali, 3 to 10 parts of an etching-resistant additive and 3000 to 5000 parts of a photoresist solvent, and the etching-resistant additive is a cholic acid derivative; the film-forming resin comprises metacrylic acid ester with a side chain containing lactone, metacrylic acid ester with a side chain containing an aliphatic ring protecting group and metacrylic acid ester with a side chain containing a polar group; according to the etching-resistant ArF photoresist disclosed by the invention, the photoresist with a relatively high-resolution pattern can be formed; the photoresist has high resolution and etching resistance, and the application range of the photoresist can be widened.

The invention discloses a method for preparing a multi-scale reinforced carbon aerogel composite material by using expandable graphite to assist in reducing carbonization shrinkage rate, which comprises the following steps: by taking phenolic resin as a matrix, blending an expandable graphite reinforcement body to prepare an impregnation liquid, performing vacuum impregnation on PAN-based pre-oxidized fiber felt, curing and drying, and performing high-temperature annealing to prepare the multi-scale reinforced carbon aerogel composite material. Carbon aerogel matrix construction, PAN fiber felt carbonization and in-situ expansion of expandable graphite are realized in one step, so that the heat insulation-bearing integrated carbon aerogel composite material with low shrinkage rate, light weight and high strength is prepared. The technological process is simple and easy to operate, and the obtained composite material has good mechanical strength and high-temperature heat insulation performance and is suitable for large-size preparation and batch production.

The invention discloses a modified polyurethane photocureable coating and a preparation method thereof. The preparation method comprises the following steps: firstly, introducing modified BNNS into castor oil to prepare a modified chain extender; the preparation method comprises the following steps: reacting dihydric alcohol with isocyanate to obtain a prepolymer; sequentially reacting the prepolymer with modified castor oil and a modified chain extender to prepare modified polyurethane resin; stirring and mixing the modified polyurethane resin, the reactive diluent, the dispersing agent and the flatting agent; adding a defoaming agent, stirring and mixing, grinding, filtering and discharging, and adding a photoinitiator for stirring and dispersing during use, so as to obtain the modified polyurethane photocureable coating. The ink has a dielectric property and a self-repairing property, and also has relatively strong adhesive force, relatively good water resistance and solvent resistance.