40 results about "Photo curing" patented technology

The application relates to a high-elasticity chitosan / silk fibroin semi-interpenetrating network hydrogel and a photo-curing preparation method thereof. The high-elasticity chitosan / silk fibroin semi-interpenetrating network hydrogel is obtained by mixing a regenerated silk fibroin solution and a solution containing acylated chitosan, then performing ultrasonic treatment and photo-curing, the compressive stress is 1000-1200 kPa, the maximum strain is 50-60%, and the Young's modulus is 300-400 MPa. The high-elasticity chitosan / silk fibroin semi-interpenetrating network hydrogel provided by the application has good mechanical properties, elasticity and biocompatibility, and has a good application prospect in the field of biomedical materials.

The utility model provides a support structure of a plastic spraying and curing conveying line, belongs to the technical field of plastic part processing equipment, and aims to solve the problems that the spraying direction and the light curing irradiation direction in a processing bin are fixed, plastic products on a support are not uniformly processed, multiple procedures need to be repeatedly processed, and the processing efficiency is low. Comprising a placing table and a chain mechanism arranged in the placing table, the chain mechanism is connected with a plurality of support bodies, each support body comprises a rotating disc, the bottom of the rotating disc is connected with a gear, the rotating disc and the gear are rotationally connected with one chain link of a chain in the chain mechanism through a connecting shaft, the rotating disc is provided with a frame rod through a supporting sleeve, and the top of the frame rod is provided with a supporting cap. A sliding cavity in a circulating conveying path shape is formed in the containing table, the supporting sleeve is clamped in the sliding cavity, a rack is arranged at the bottom of the table top of the containing table and located on the inner side of the sliding cavity, and the gear on each support body is meshed with the rack.

A photo-curable composition can include a photo-curable resin and a photoinitiator. The photo-curable composition can typically have a shear viscosity of less than 1 Pa·s at 100° C. at a shear rate of 50 s−1 and can typically include a first prepolymer, a second prepolymer, and a reactive diluent.

The application discloses a high-solid-content simulated moon soil paste with excellent rheological and retention characteristics and a preparation method thereof. The high-solid-content simulated moon soil paste comprises a premixed liquid and a simulated moon soil powder, and the weight ratio of the premixed liquid to the simulated moon soil powder is 1:(78-82). The premixed liquid comprises 90-95 parts of photosensitive resin, 5-10 parts of wetting dispersant, 3-5 parts of water, 3-5 parts of defoaming agent and 1-5 parts of photoinitiator. The high-solid-content simulated moon soil paste is based on the emulsification principle of two mutually insoluble liquids, a certain proportion of aqueous solution is introduced, under the action of the wetting dispersant, the water and the resin interface form a directional molecular layer and are emulsified to reduce the surface tension, according to the Gibbs adsorption formula, the problem that the high solid phase is difficult to reduce the viscosity is better solved, and in combination with the SLA photocuring technology, the photocuring printing of the simulated moon soil paste with the solid content of 62vol% is realized.

The invention provides a high-concentration oxime ester compound solution and application thereof. The invention also relates to preparation of a photocuring composition taking the solution as a photoinitiator component and preparation of a photoresist. The high-concentration oxime ester compound solution contains at least one compound with a structure shown as a formula I and at least one solvent, the mass of the compound shown as the formula I accounts for 50%-95% of the mass of the high-concentration oxime ester compound solution, and the balance is the solvent or other compounds. The high-concentration oxime ester compound solution disclosed by the invention has remarkable use convenience in a photocuring composition formula, especially in a photoresist production process, and the risk that a photoinitiator is possibly separated out in a low-temperature storage process of photoresist is completely eliminated.

The invention relates to the technical field of electrical property testing of materials, in particular to a method for rapidly and quantitatively detecting the conductivity of photocuring conductive hydrogel, which comprises the following steps: step S1, pretreatment of a curing container; s2, injecting a hydrogel solution, curing and detecting the conductivity; placing the curing container on a detection base; an electrolyte solution and deionized water are dropwise added into the two liquid storage tanks respectively, the head end and the tail end of the curing container are soaked in the electrolyte solution and the deionized water respectively, then a detection device is used, a chronoamperometry method is adopted for measuring current, and the conductivity is obtained through calculation; the method is high in detection efficiency, rapid and quantitative detection of conductivity is realized, real conductivity detection data can be obtained, the accuracy and reliability of a detection result are ensured, and the problems that an existing detection method is long in detection time consumption, low in detection efficiency, low in conductivity detection data authenticity and poor in detection accuracy are solved. And the accuracy and the reliability of a detection result cannot be ensured.

The application discloses a preparation method of a photocurable rare earth doped low-oxygen silicon carbide fiber, and comprises the following steps: preparing liquid sol A by taking a rare earth metal organic complex and polydimethylsilane as raw materials; obtaining a polycarbosilane precursor B containing a rare earth metal element by evaporating a solvent and high-temperature cracking reaction of the sol A; then preparing modified polycarbosilane by blending reaction of the polycarbosilane precursor B and an unsaturated organic ether; and then performing infusibilization treatment on the modified polycarbosilane by ultraviolet light irradiation under the action of a photoinitiator after melt spinning; and finally obtaining the rare earth doped low-oxygen silicon carbide fiber after high-temperature sintering treatment. f The rare earth element is introduced in the preparation of the precursor, and the rare earth element is uniformly dispersed in the silicon carbide crystal lattice, and the silicon carbide original wire is subjected to infusibilization crosslinking treatment by combining photo-curing, so that the crystal growth and electromagnetic properties of the ceramic can be better improved while the oxygen content of the silicon carbide fiber is reduced.

This invention belongs to the field of hydrogel materials technology, and specifically provides self-modulating photocurable cooling hydrogels, their manufacturing methods, and applications. [Solution] The self-regulating photocurable cooling hydrogel consists of 10-17 parts of a cooling matrix and acrylamide- 13 It contains 8-33 parts of C31, 27-42 parts of glycerin, 5 parts of TPGDA, 0.05-0.15 parts of crosslinking agent, and 0.1-0.3 parts of photoinitiator. By constructing a cooperative system between the antifreeze protein and the konjac glucomannan backbone, the objectives of gelation of isotope-labeled monomers and self-regulation of cooling sensation are achieved, and it can be used in the manufacture of drug-carrying gel dressings, cooling gel dressings, and in situ injection gel products. The photocuring crosslinking technology is advantageous for rapid formation of gel dressings and improves the stability of the active ingredient.

The invention discloses a method for changing surface characteristics by using an ink jet technology, and relates to the technical field of surface treatment, and the method comprises the following steps: reducing the surface energy of a hydrophilic material, converting the hydrophilic material into a hydrophobic material, improving the surface energy of the hydrophobic material, and converting the hydrophobic material into the hydrophilic material. According to the method, a hydrophilic material can be converted into a hydrophobic material, the hydrophobic material can be converted into the hydrophilic material, a coating with a specific thickness can be formed on a target base material by printing the photoinitiator and the active monomer and carrying out photocuring, and the coating can change the surface energy of the material, so that the surface energy of the material can be changed. Compared with the prior art, the photoinitiator and the active monomer are added, so that the original hydrophilicity or hydrophobicity of the photoinitiator is converted into the opposite property, the photoinitiator and the active monomer have important significance in controlling the wettability, the pollution resistance and the like of the material, and the final surface energy is accurately controlled by controlling the selection, dissolution and printing processes of the photoinitiator and the active monomer.

The application discloses a preparation method of marine fish source methacrylated gelatin GelMA hydrogel and application thereof, and successfully prepares GelMA by using marine fish source gelatin, forms the hydrogel by ultraviolet curing through a photo initiator lithium phenyl-2, 4, 6-trimethyl benzoyl phosphonate (LAP), and successfully realizes 3D culture of cells. The marine source GelMA has the characteristics of sustainable source and high biological safety, the process of photo curing into gelatin is mild, fast, small in cell damage, simple in operation, and can be applied to the fields of cell culture, tissue engineering, drug screening and personalized treatment, and the like, and at present, marine source GelMA is less reported, and has a good market prospect.

The invention discloses a high-adhesion UV ink jet curing five-color ink for a glass plate and a preparation method thereof, the five-color ink comprises five basic colors of red, yellow, blue, white and black, and the ink is subjected to UV curing by using an ink jet printer. The light-cured ink is characterized by comprising the following main components: 40-70% of a monofunctional light-cured monomer, 1-20% of a bifunctional and multifunctional light-cured monomer, 1-10% of an acidic light-cured monomer, 5-30% of polyurethane acrylate resin, 1-10% of hyperbranched polyester acrylate resin, 3-15% of a photoinitiator, 1-20% of a color paste pigment and 0.1-10% of an auxiliary agent. Compared with the prior art, the water-based UV ink has the advantages that the water-based UV ink has high adhesive force on glass, does not need a glass surface coating to enhance the adhesive force, does not need post-baking secondary curing, and has excellent performances of high adhesive force, high-temperature and high-humidity resistance, high flexibility, scratch resistance, ethanol resistance and the like after being directly subjected to UV curing by using ink-jet printing equipment. The jet printing operation of the ink is simple and rapid, the curing speed is high, the production efficiency can be greatly improved, and the emission of VOC is reduced.

The application provides a kind of high-precision easy-to-collapse ceramic shell for additive manufacturing, belonging to investment precision casting technical field, comprising slurry, the slurry includes ceramic matrix powder, photocuring resin, dispersing agent and suspending agent, the matrix powder includes EC95 powder, high-purity alumina powder, bauxite powder, micro-fine silicon nitride powder, the mass percentage of each material in the matrix powder is: EC95 powder is 60-80wt%, high-purity alumina powder is 10-20wt%, bauxite powder is 8-15wt%, micro-fine silicon nitride powder is 2-5wt%, after the slurry is prepared, the shell wet blank is prepared by using photocuring 3D printing equipment, then the ceramic shell is formed by using step oxygen supplement process for debinding and baking. The application can reduce the shell making cycle, improve the shell making efficiency, on the basis of ensuring the high-temperature strength of the ceramic shell, improve the size accuracy of the shell and the collapsibility after pouring.

This invention relates to a method for testing the reaction temperature of photocurable composite materials. The testing device includes a constant temperature chamber, a photocuring unit, a loading unit, and a data acquisition unit. The constant temperature chamber includes a chamber body and a heating unit and a heat dissipation unit fixedly connected to the chamber body. The photocuring unit is fixedly connected to the upper end of the chamber body and communicates with the interior of the chamber body. The loading unit includes a fixing plate, a pressure plate, and a fixing clamp. The fixing plate is fixedly connected to the chamber body, and the pressure plate is used to press the test specimen onto the fixing plate. The data acquisition unit includes a controller, a first temperature sensor, a second temperature sensor, and an information acquisition device. The controller is electrically connected to the first temperature sensor, the second temperature sensor, and the information acquisition device. This testing method can effectively detect the temperature change of composite material specimens during the curing process, providing experimental support for composite material research.

The application belongs to the technical field of sludge treatment, and particularly relates to a method and device for building material utilization of low-organic-matter multi-source sludge rapid photocuring, A1: taking low-organic-matter multi-source sludge S1 as a main building material, S1 is multi-source sludge with a water content of 60-80%, and the organic matter content is 30%-50%, waste oil S2 is added, and the volume ratio of S1 to S2 is 10:1; A2: green foaming surfactant Sol-A is added into the low-organic-matter multi-source sludge S1 to form a mixture S3, and the ratio of S1 to Sol-A is 100: (1-3); after photocuring, the sludge is deeply dewatered and subjected to multi-wavelength cyclic irradiation, the water content of the sludge can be reduced to below 30% within 30-32 min, and the sludge enters a pyrolysis or drying device, and is burned into carbon-based material containing holes, the energy consumption is reduced by 50%, the comprehensive photocuring material consumption is reduced by 10%, and the total cost is reduced by 30%-40% compared with the energy consumption of the traditional dewatering-pyrolysis / drying process.

The present invention relates to a composition comprising (i) at least one compound or oligomer (A) carrying at least one ethylenically unsaturated group, (ii) at least one thermal radical initiator (B) of formula (1), and (iii) at least one photoinitiator (C); to a process for preparing a cured layer or a cured pattern using these compositions; to a cured layer and a cured pattern formed by a corresponding method; and to a device comprising at least one cured layer or cured pattern.

The invention belongs to the technical field of hydrogel materials, and specifically relates to a self-regulating photo-curable cooling hydrogel and a preparation method and an application thereof. The self-regulating photo-curable cooling hydrogel comprises the following raw materials in parts by weight: 10-17 parts of cooling matrix, 18-33 parts of acrylamide-13C3, 27-42 parts of glycerol, 5 parts of TPGDA (tripropylene glycol diacrylate), 0.05-0.15 parts of crosslinking agent, and 0.1-0.3 parts of photoinitiator. By constructing a synergistic system of antifreeze protein and konjac glucomannan skeleton, the gelation of an isotope-labeled monomer and the purpose of self-regulating cooling are achieved. It can be used for preparing drug-loaded gel dressings, cooling gel dressings, and in-situ injectable gel products. The photo-curable crosslinking technology facilitates the rapid molding of gel dressings and improves the stability of active ingredients.

Branched polymers prepared by free radical vinyl polymerisation, comprising residues of a multivinyl monomer, residues of a chain transfer agent, and optionally residues of a monovinyl monomer, which carry photoinitiator and / or photosynergist moieties, and photocurable compositions comprising such polymers, are particularly though not exclusively of use in photocurable applications in the fields of 3D printing, printing inks, coatings, adhesives, electronics, packaging (e.g. food packaging), dentistry and biomedical products. TBRT polymers are suitable polymers in this context. Such polymers may be prepared by free radical techniques.

The invention discloses a light-cured non-silicon release agent, a heavy stripping release film and a preparation method. The light-cured non-silicon release agent is prepared from the following raw material components in parts by weight: 50 to 70 parts of long-chain polyacrylate containing double bonds, 5 to 10 parts of tris (2-hydroxyethyl) isocyanuric acid triacrylate, 1 to 5 parts of a photoinitiator, 1 to 3 parts of a de-foaming agent and 100 to 200 parts of a first solvent. According to the formula of the release agent, long-chain polyacrylate containing double bonds and tris (2-hydroxyethyl) isocyanuric acid triacrylate are compounded, so that the prepared release film has excellent performance: the residual adhesive force is greater than 90%, and the appearance is excellent; the release film provided by the invention is cured by adopting a low-temperature drying and photocuring process, so that the use of high-temperature and long-time curing processes can be avoided, the energy consumption can be obviously reduced, and the release film conforms to the environmental protection trend.

The invention discloses a slurry pretreatment coating machine which comprises a pretreatment rack, and a first unwinding unit, a second unwinding unit, a first micro-gravure coating head unit, a composite photocuring unit, a second micro-gravure coating head unit and a winding unit are sequentially and fixedly mounted at the bottom end of the pretreatment rack from left to right; the composite photocuring unit comprises a curing rack and a composite rubber roller, one side of the bottom end of the inner wall of the curing rack is rotationally connected with one end of the composite rubber roller, and the curing rack is rotationally connected with a composite steel roller located on one side of the composite rubber roller. The base material is cooled through the pretreatment unit, cold air is blown out through the lower air nozzle and the upper air nozzle, in order to meet the requirements of the base materials with different thicknesses and meet different process requirements, the adjusting roller is used for adjusting the gap and adjusting the optimal state of a film path, the production time is shortened, and the yield of product preparation is improved.

An information processing method for generating control information for controlling spread of a plurality of droplets of a photo-curing composition arranged between a substrate and a mold, includes generating, as a part of the control information, control data that controls an irradiation condition of light to be irradiated to each of the plurality of droplets such that a shape change of each of the plurality of droplets before droplets adjacent to each other among the plurality of droplets are connected to each other satisfies a target condition.

This invention relates to the field of cell biotechnology, specifically to a method for large-scale preparation of cultured meat using a pilot-scale standardized bioreactor. The method includes the following steps: preparing photocurable microcarriers using gelatin and a photoinitiator; mixing large yellow croaker myoblasts, large yellow croaker preadipocytes, and the photocurable microcarriers, and then inoculating the mixture into a pilot-scale standardized bioreactor for culture; collecting the cell-bearing microcarriers cultured in the pilot-scale standardized bioreactor; and processing the cell-bearing microcarriers using a mold to prepare cultured meat. This invention uses large yellow croaker myoblasts, large yellow croaker preadipocytes, and photocurable microcarriers as experimental materials. Through a specific culture process, the pilot-scale standardized bioreactor is set up. By utilizing real-time monitoring and control of the culture conditions in the pilot-scale standardized bioreactor, the suspension co-culture of two types of large yellow croaker stem cells on photocurable microcarriers is achieved. Large-sized cultured meat is then prepared through mold processing.

The present application relates to the field of stainless steel material, and particularly relates to an antibacterial stainless steel plate for refrigerator lining and a preparation method thereof. The present application first prepares a stainless steel plate by adding stainless steel alloy powder. Then, the stainless steel plate is sequentially polished, ultrasonically cleaned, dried, laser etched, and cleaned again to obtain a pretreated stainless steel plate. Then, the pretreated stainless steel plate is immersed in a mesoporous polydopamine immersion liquid and reacted in the dark to obtain an antibacterial adhesion layer. Then, polyurethane-acrylic antibacterial paint is coated onto the surface of the stainless steel plate, and photocured to obtain a finished product. The finished product prepared by the present application has good antibacterial ability, and the coating can be firmly attached to the substrate, so the present application has a wide application prospect in the field of stainless steel material.

The application discloses a kind of photo-curing digital detection chip and its application, the chip includes chip main body and sealing substrate, chip main body includes support layer and channel structure layer;Channel structure layer is the thin layer prepared by photo-curing material after photo-curing, and channel structure is processed on the thin layer;Photo-curing material includes raw material containing photo-curing functional group and photo-initiator;Photo-curing material has air permeability after photo-curing;Photo-curing functional group is selected from one or more of mercapto functional group, alkenyl functional group, acrylate functional group, methacrylate functional group, vinyl ether functional group, epoxy functional group.The chip solves the problem of sample injection difficulty of plastic chamber type digital detection chip, and can be injected by positive pressure, negative pressure and the combination of positive and negative pressure, and the injection mode is flexible and simple;Meanwhile, chip processing process is simple, fast, high throughput and low cost, which makes up for the deficiency of high cost and difficult to quickly prepare PDMS chip;The photo-curing digital detection chip can be widely applied to nucleic acid, protein and other biomolecule detection field, and cell, microorganism culture field.

The invention relates to the technical field of photocureable coatings, in particular to a Cu-MoTi alloy etching solution. The water-based cutting fluid comprises the following components in percentage by weight: 15-20% of an oxidizing agent, 1.8-2.5% of first organic acid, 0.5-1.5% of inorganic acid or inorganic acid salt, 0.5-2% of second organic acid, 0.01-0.2% of a fluorine compound, 0.01-0.2% of a urea compound, 0.5-1% of a copper inhibitor, 0.1-1% of a pH regulator, 0.1-1% of an amine stabilizer, 0.1-1% of an alcohol stabilizer and the balance of deionized water. The etching liquid system can be self-mixed, so that the transportation cost is saved, and the shelf life is prolonged; a 4mask test block and a 5mask test block can be used in a compatible manner; and surface residues can be removed while a certain length of trailing is reserved.

This invention discloses an impression composition, an impression material, an impression, and a method for preparing the same, belonging to the field of photocuring technology. The impression composition comprises the following components in weight percentages: 10%-25% oligomer, 1%-5% acrylate monomer, 0.05%-1% photoinitiator, 0.5%-2% dispersant, and 62%-85% silica filler; wherein the oligomer includes polyurethane acrylate with a functionality of 3-9. The impression composition is prepared by uniformly mixing the above raw materials and further molded into a photocurable impression material. Before curing, this impression intermediate exhibits excellent flexural strength (i.e., tear resistance), detail reproduction, and storage stability. In use, the impression material can be directly cured using photocuring. The curing time is suitable and controllable, the degree of curing is high, and it exhibits good dimensional stability during curing. The prepared impression has high hardness.

The invention relates to a multi-slurry, multi-energy-field and multi-configuration composite forming additive manufacturing method and system, and relates to the field of photocuring ceramic 3D printing. According to the technical scheme, the requirements for light weight, high strength and functional gradient of components can be balanced, variable-thickness slicing gives consideration to forming precision and efficiency, and a technological parameter initial solution set is pre-generated to reduce the subsequent debugging trial and error cost; preparing various types of functional differentiation photosensitive slurry to adapt to a multi-material gradient design; constructing a multi-energy field coupling model to predict curing behaviors, implementing multi-energy field cooperation according to component areas, and improving structural density, functional characteristics and interface bonding quality; an integrated high-precision monitoring module is used for acquiring interlayer data, so that defect identification and positioning and dynamic adjustment of process parameters are realized, and cooperative control of microcosmic particle orientation and macroscopic size is achieved; a degreasing curve is optimized to reduce the residual carbon content of the component, the sintering deformation compensation amount is pre-generated to avoid size out-of-tolerance, and the research and development period is shortened by means of a parameter, structure and performance correlation model.

The utility model discloses an additive manufacturing platform based on photocuring forming in the technical field of additive manufacturing, which comprises a working table, a resin groove is arranged on the inner side of the working table, a flow guide plate is arranged in the resin groove, a recovery hole is arranged on one side in the resin groove, the outer end of the recovery hole is fixedly connected with a flow guide pipe, and the flow guide pipe is fixedly connected with the working table. A barrel is fixedly connected to one end of the flow guide pipe, a motor is fixedly installed at the bottom of the barrel, a rotary drum is rotatably installed at the bottom of the inner side of the barrel in a limited mode, multiple sets of filtering holes are evenly formed in the surface of the rotary drum, and the bottom of the rotary drum is fixedly connected with the output end of the top of the motor; a first connecting pipe is fixedly connected to one side of the barrel, uncured resin and impurities can be centrifugally separated through the arranged rotary drum, the uncured resin and the impurities flow back to the interior of the collecting box, and recycling is facilitated.

The invention relates to ultraviolet-cured castor oil-based polylactic acid and a preparation method thereof. According to the technical scheme, the preparation method comprises the following steps: adding castor oil, lactide and a catalyst into an ampere flask, vacuumizing, carrying out magnetic stirring reaction at 90-150 DEG C for 5-12 hours, adding a cross-linking agent, a photoinitiator and a solvent, pouring to form a film after the system is uniformly dissolved, and curing for 5 seconds to 1 hour under the condition of ultraviolet irradiation, so as to prepare the ultraviolet-cured castor oil-based polylactic acid. The preparation method has the characteristics of abundant raw material sources, simple process, high curing efficiency, low cost, low toxicity, environment friendliness and suitability for industrial production, and the prepared ultraviolet-cured castor oil-based polylactic acid has good flexibility and light transmission, is safe and low in toxicity, and has wide application prospects in the aspects of food packaging, electronic devices, biomedical treatment and the like.

The invention discloses multi-element copper powder synergistic high-stability photocuring copper paste and a preparation method thereof, and belongs to the technical field of additive manufacturing. The slurry comprises 73%-94% of metal powder, 0.17%-0.8% of small organic molecules, 3%-15% of a reactive diluent, 0.5%-8% of an oligomer, 0.2%-1.3% of a photoinitiator, 0.8%-3.5% of a dispersing agent and 0.05%-0.5% of an antioxidant. The metal powder is composed of nano copper powder, spherical micron copper powder and flaky copper powder. During preparation, the copper powder is subjected to V-shaped mixing and then treated with an organic micromolecule ethanol solution to form a surface passivation layer, and then the surface passivation layer is mixed with a resin premixed solution containing the antioxidant through a homogenizer. The stability and sintering performance of the slurry are synergistically improved through the multi-element copper powder, the oxidation resistance is synergistically enhanced through the small organic molecule passivation layer and the antioxidant, and the additive manufacturing method is suitable for additive manufacturing of high-precision metal parts.

The invention belongs to the technical field of photocureable coatings, and particularly relates to a preparation method of UV photocureable coating environment-friendly matting powder for PVC wood floors. The preparation method comprises the following steps: S1, preparing a water glass solution and a sulfuric acid solution; s2, simultaneously injecting a water glass solution and a sulfuric acid solution into the reaction kettle to form silica sol; s3, adding caustic soda to adjust the pH value to be alkaline, adding a silane coupling agent, a performance additive and a photocatalyst according to a certain proportion, heating, boosting and aging, adjusting the pH value to be acidic, aging and washing; and S4, treating the three mixed waxes in proportion through two-stage spray drying, and performing fluid energy milling through a fluidized bed to obtain the wax. The matting powder product provided by the invention is high in matting property and excellent in viscosity control, matting property and weather resistance, the content of formaldehyde in a UV wood board is controlled to be lower than E0 level, domestic substitution is realized, and the greening process in the UV photocuring field is further accelerated.