18results about How to "Avoid Agglomeration and Precipitation" patented technology

The invention discloses a method for preparing low-sensitization bean flour through cavitation jet flow assisted restrictive enzymolysis, and belongs to the technical field of bean product processing. Grinding into thick liquid; carrying out enzyme deactivation and inactivation; centrifugally discharging slag; sterilizing and deodorizing; performing enzymolysis; carrying out cavitation jet flow homogenization treatment; sterilizing and concentrating; performing spray drying; and performing fluidized bed powder screening to obtain the hypoallergenic bean flour. The bean flour is prepared by adopting a restrictive enzymolysis technology, so that the content of sensitization protein is effectively reduced, and in order to further improve the digestibility of the plant-derived food base material and realize nanocrystallization of soybean milk droplets so as to further reduce the sensitization of the bean flour, cavitation jet treatment is also introduced. Enzymolysis and cavitation jet homogenizing treatment show a synergistic interaction effect, and the two technologies jointly play a role, so that the content of sensitization protein is reduced, and the sensitization of the bean flour is remarkably reduced.

This invention relates to the field of skincare technology, disclosing a composition containing acetylated curcumin, its preparation method, and its application. The composition comprises 0.01-0.50 wt% acetylated curcumin, 0.10-0.5 wt% ferulic acid, 0.05-0.40 wt% citric acid compounds, and 5.00-20.00 wt% polyol. Ferulic acid quenches reactive oxygen species and improves the stability of acetylated curcumin; citric acid compounds stabilize the pH of the system, chelate metal ions, block the Fenton reaction, and inhibit the generation of •OH free radicals; the polyol enhances the water solubility of acetylated curcumin and improves the stability of ferulic acid. This invention, through the compounding of ferulic acid, citric acid compounds, and polyol, significantly reduces the problems of discoloration, off-flavor, and pH decrease caused by the decomposition of acetylated curcumin aqueous solutions under high temperature or light conditions. Furthermore, the preparation process is simple, easy to operate, and highly adaptable to various processes.

The invention discloses a preparation method of a mattress with a negative ion sleep-aiding function, including the preparation of a negative ion release function stimulator, the preparation and modification of a negative ion emission function powder, and the compounding of the negative ion emission function powder with an adhesive and a stimulator: mixing waterborne polyurethane and the stimulator in a container, stirring evenly until they are completely dissolved, then adding negative ion emission nanopowder, stirring evenly, and preparing a negative ion emission compound solution; applying the negative ion emission compound solution to the surface of fabrics through a padding process, and processing the fabrics to prepare a functional mattress. The preparation technology of the negative ion function finishing agent provided by the invention solves the shortcomings of the prior art negative ion emission materials with low emissivity and low efficiency in improving environmental quality. Compared with the traditional preparation method, the cost is reduced, the operation is convenient, the particle size of the nanopowder is controllable, and the production efficiency is high.

The invention relates to the technical field of ink, and discloses a preparation method of environment-friendly water-soluble engraved gravure ink, which comprises the following steps: placing porous short fibers in water, adding a surfactant, heating to 40-60 DEG C, and stirring to obtain a suspension; adding pigments into the turbid liquid in batches, fully stirring, standing, filtering, and drying the filtered material to obtain porous short fibers filled with the pigments; the preparation method comprises the following steps: selecting polyethylene glycol with a melting point of 35-60 DEG C, heating to melt, adding porous short fibers, slowly stirring, filtering, dispersing the porous short fibers, cooling at normal temperature, and slowly stirring and mixing with an anhydrous ink binder to prepare ink slurry; uniformly mixing water and an auxiliary agent to prepare a water-based diluent; before spraying, the ink slurry and the water-based diluent are mixed and are sprayed after being fully ground. According to the invention, the nano pigment is blocked in the porous short fiber, the pigment in the ink paste cannot diffuse out from surface micropores of the porous short fiber, and the porous short fiber is stably dispersed, so that the problem of pigment agglomeration and precipitation is avoided.

The invention provides a nano-composite super-early-strength polycarboxylate superplasticizer and a preparation method and application thereof.The preparation method comprises the following steps that 1, a polyether macromonomer, a reducing agent, a functional monomer, an oxidizing agent and deionized water are added into a reaction container and stirred at the temperature of 25-45 DEG C till all the components are dissolved, and a reaction solution A is obtained; step 2, simultaneously dropwise adding an acrylic acid solution and a vitamin C aqueous solution into the reaction solution A in a stirring state at 25-45 DEG C, heating to 45-65 DEG C after dropwise adding is completed, carrying out a heat preservation reaction for a period of time, and adjusting a reaction system to be alkaline by using an alkaline compound and / or an aqueous solution of the alkaline compound to obtain a reaction solution B; and step 3, adding a calcium nitrate aqueous solution and a sodium silicate aqueous solution into the reaction solution B at 0-10 DEG C, and stirring to react for 30-60 minutes to obtain a finished product. The concrete early strength improver has the beneficial effects that the early strength of concrete is remarkably improved, the mixing amount is low, the water-reducing rate is high, the slump loss resistance is strong, the mud resistance is good, the preparation method is simple in process, the energy consumption is low, the production period is short, and industrial production is easy.

The invention relates to the technical field of thermoplastic composite materials, in particular to a thermoplastic prepreg preparation system and method based on a powder suspension method. The method comprises the following steps: (1) drawing out fibers from a creel, and carrying out yarn arrangement and yarn spreading treatment on the fibers; (2) soaking the fiber after yarn spreading in the step (1) into a resin tank, so that the thermoplastic resin is adhered to the surface of the fiber; (3) drawing the fibers adhered with the thermoplastic resin in the step (2) into a drying oven, removing moisture of the fibers, and preheating the fibers; (4) heating the thermoplastic resin adhered to the surface of the fiber preheated in the step (3) by a high-temperature constant-pressure template until the thermoplastic resin is in a molten state; (5) impregnating the thermoplastic resin heated and molten in the step (4), calendering, leveling, cooling and sizing; and 6) carrying out edge cutting and rolling on the prepreg shaped in the step 5). The thermoplastic resin is uniformly adhered to the surface of the fiber, so that the thickness of the prepreg is reduced.

The invention provides an antigen purification and renaturation method, which comprises the following steps: by improving a renaturation agent formula and a purification and renaturation process route, firstly completing chromatographic column purification after denaturation and then carrying out renaturation, and containing polyethylene glycol and cystine in an equilibrium buffer solution, a washing buffer solution, an elution buffer solution and a renaturation agent, the problem that recombinant protein is prone to aggregation and precipitation after renaturation is solved, CHAPS is further added to improve the renaturation effect for the recombinant protein with weak stability, the prepared recombinant protein is more stable, aggregation and precipitation are prevented, the yield is high, good immunocompetence is achieved, and the detection sensitivity when the recombinant protein is used for detecting antibodies is improved.

The invention discloses an antistatic photocureable coating and a preparation method and application thereof, and belongs to the technical field of photocureable paints.The preparation method comprises the following steps that S1, a single-walled carbon nanotube, a polymeric dispersant and a connecting agent are placed in a defoaming machine, mixed defoaming is conducted under the vacuum condition, then photocureable resin is added into the defoaming machine, and the mixture is stirred to be uniform; mixing and defoaming under a vacuum condition to obtain a mixture; s2, transferring the mixture into a three-roller grinding machine, and grinding and dispersing for 1-3 times at the rotating speed of 500rpm, so as to obtain the anti-static light-cured resin; s3, uniformly mixing anti-static light-cured resin, a light-cured monomer, an initiator and an auxiliary agent to obtain an anti-static light-cured coating; the preparation method disclosed by the invention is simple and efficient, low in production cost and easy to realize large-scale production; the prepared coating is good in anti-static effect, high in light transmittance and low in haze, can meet various application scenes of optical thin films, and has extremely high commercial value.

The present application relates to natural product separation and extraction technical field, specifically disclose a kind of method for separating and extracting astaxanthin with haematococcus pluvialis as raw material, comprising the following steps: (1) haematococcus pluvialis pretreatment preparation haematococcus pluvialis dry powder;(2) using ultrasonic-assisted natural deep eutectic solvent separates and extracts astaxanthin from haematococcus pluvialis dry powder and obtains crude extract;(3) using macroporous resin dynamic adsorption crude extract and purifying and collecting astaxanthin eluate;(4) astaxanthin eluate is concentrated by rotary evaporation under reduced pressure, freeze-dried, and astaxanthin crystal powder is obtained.The method provided by the present application effectively improves the extraction rate of astaxanthin by the ternary synergy of natural deep eutectic solvent, the trans-phase antioxidant synergy of tocopherol and ascorbyl palmitate, and the mild process of ultrasonic-assisted extraction and resin gradient elution, maintains the purity of astaxanthin and the proportion of all-trans astaxanthin, and prolongs the antioxidant retention time of astaxanthin.

The invention relates to the technical field of inks, and discloses a method for preparing an engraved gravure ink, comprising the steps of preparing a PAMAM dendrimer carrier, loading a pigment, grafting a diisocyanate, chain growth, and post-processing. Compared with the form in which the pigment and the linker need to be fully mixed at the physical level in the traditional ink, the invention embeds the pigment in the dendrimer-modified polyurethane, provides a new combination of dyes and linkers, and fundamentally avoids the problem of pigment agglomeration and precipitation caused by poor compatibility between the pigment and the linker.

The invention discloses a film-forming lubricating wear-resistant lead screw working fluid and a preparation method thereof. The processing liquid is prepared from the following components in parts by weight: 12 to 28 parts of surface modified nano nickel ferrite, 2.5 to 8.5 parts of ferroferric oxide, 6 to 15 parts of a compound adhesive, 8 to 22 parts of a compound dispersant, 0.8 to 3.2 parts of a compound antioxidant and 50 to 99 parts of base oil. The preparation method comprises the steps of step-by-step modification, ultrasonic dispersion and high-shear homogenization. Through a magnetic synergistic lubrication system and a rapid film forming technology, the technical problems of insufficient lubrication performance, poor wear resistance and difficult film forming of the traditional screw rod working fluid are solved. Compared with the traditional cutting fluid, the optimal embodiment of the invention realizes the remarkable effects that the friction coefficient is reduced by 57.1%, the tool wear is reduced by 42.5%, the surface roughness is improved by 60.4%, and the dispersion stability exceeds 30 days.

The invention discloses preparation and application of a super-strong light-resistant hydrophobic nano lignin / SiO2-TiO2 wood protective coating, and belongs to the technical field of wood functional modification. According to the preparation method disclosed by the invention, firstly, tetraethoxysilane is taken as a silicon source, and the surfaces of nano TiO2 particles are coated with SiO2 layers, so that the SiO2-TiO2 composite particles with core-shell structures are prepared, and the problems that nano TiO2 is easy to agglomerate and poor in dispersity are solved. Then, alkali lignin is subjected to quaternization modification, and quaternization lignin nano particles (QAL-LNPs) are prepared. And finally, the QAL-LNPs and the SiO2-TiO2 particles are jointly dispersed in a mixed solution composed of absolute ethyl alcohol, a silane coupling agent and a water repellent agent to form a stable composite coating solution, the stable composite coating solution is sprayed to the surface of the wood, and the composite coating is obtained after curing. The coating endows wood with excellent ultraviolet aging resistance and good hydrophobicity, and is suitable for surface protection of outdoor wood products and wood structure buildings.

The invention relates to the technical field of printing ink, and discloses a preparation method of carving gravure printing ink, which comprises the following steps: preparing a PAMAM (Polyamidoamine) tree-shaped macromolecular carrier, loading pigment, grafting diisocyanate, carrying out chain propagation, carrying out post-treatment and the like. Compared with a mode that pigments and connecting materials in traditional ink need to be fully mixed in a physical layer, the method has the advantages that the pigments are embedded in the tree-shaped macromolecule modified polyurethane, a novel combination mode of the dyes and the connecting materials is provided, and the problem that the pigments are agglomerated and precipitated due to poor compatibility of the pigments and the connecting materials is fundamentally solved.

This invention relates to a highly stable lutein-zeaxanthin soft capsule and its preparation process, belonging to the field of health product technology. The soft capsule comprises a shell and contents. The contents include core-shell structured composite coated particles and a plant oil carrier. The particles have a core-shell structure: the core is a microcapsule formed by emulsifying lutein and zeaxanthin with sodium octenyl succinate starch; the outer shell is a coating layer formed by in-situ deposition of zein on the surface of the core microcapsule using an antisolvent precipitation method. Natural antioxidants are dissolved in the plant oil carrier, spontaneously enriching in the oil phase region between the inner wall of the shell and the composite coated particles to form an interfacial antioxidant protective layer. The preparation process is carried out at low temperature, under nitrogen protection, and protected from light throughout. The gradient core-shell structure achieves stable protection in the stomach and targeted release into the intestine. Combined with interfacial antioxidant protection and comprehensive process protection, it improves the storage stability and bioavailability of the active ingredients. The product has no solvent residue and is safe for industrial production.

The present invention relates to the technical field of ink, and discloses a method for preparing an environmentally friendly water-soluble engraving gravure ink, which is operated as follows: placing porous staple fibers in water, adding surfactants, stirring after heating to 40-60°C, and obtaining a suspension; adding pigments to the suspension in batches, standing and filtering after sufficient stirring, drying the filtrate, and obtaining porous staple fibers filled with pigments; selecting polyethylene glycol with a melting point of 35-60°C, heating and melting, adding porous staple fibers, slowly stirring and filtering, dispersing the porous staple fibers, cooling at room temperature, and slowly stirring and mixing with anhydrous ink connecting materials to obtain ink slurry; mixing water and an auxiliary agent uniformly to obtain an aqueous diluent; mixing the ink slurry and the aqueous diluent before spraying, and spraying after sufficient grinding. The present invention blocks nano pigments in porous staple fibers, and the pigments in the ink slurry will not diffuse out from the surface micropores of the porous staple fibers, and the porous staple fibers are stably dispersed, thereby avoiding the problem of pigment agglomeration and precipitation.

The invention relates to self-purification transformer oil and a preparation method thereof, and belongs to the technical field of transformer oil preparation. Rare earth elements doped in the rare earth doped nanoparticles easily react with harmful impurities such as sulfur and oxygen in the transformer oil to generate high-melting-point compounds, and the compounds can be adsorbed and gathered by cellulose components of the compounds and discharged in the later period, so that harmful inclusions in the oil are reduced, and the oil quality is improved. The insulating property of the modified transformer oil is further improved. The rare earth composite particles have relatively high thermal conductivity, and can be used as a heat conduction channel when being uniformly dispersed in the transformer oil, so that the thermal conductivity of the transformer oil is improved, and the thermal conductivity of the transformer oil is further improved.

The invention relates to the technical field of separation and extraction of natural products, in particular to a method for supercritical separation and extraction of astaxanthin, which comprises the following steps: (1) weighing raw material components in parts by weight; (2) mixing a biomass raw material rich in astaxanthin with the functionalized deep-eutectic solvent, and performing physical field enhanced extraction to obtain an extracting solution; (3) filtering the extracting solution through a vibrating membrane, and purifying to obtain a trapped fluid containing astaxanthin; and (4) carrying out supercritical CO2 back extraction on the trapped fluid, separating to obtain an astaxanthin product, and recovering the functional eutectic solvent. According to the method, continuous membrane separation and purification under the eutectic solvent system are realized, the purity of astaxanthin and the proportion of all-trans astaxanthin are maintained while the extraction rate of astaxanthin is increased, the solvent can be recycled after being recovered, and the production cost and waste liquid discharge are greatly reduced. All the raw materials are nontoxic and harmless, no organic solvent is used in the technological process, and good application prospects are achieved.

This invention relates to the field of detergent technology, specifically disclosing a highly active detergent composition containing succinic anhydride and its preparation method. The invention prepares the highly active detergent composition by hydrolyzing a small amount of alkenyl succinic anhydride to obtain succinic acid. The invention also provides a lignin-based surfactant to work in conjunction with the composition, effectively preventing the redeposition of dirt washed off the fabric, thus ensuring washing performance. The composition prepared by this invention can prevent the aggregation and precipitation of dirt particles during washing, ensuring the formula remains stable and does not separate throughout its shelf life and during washing, while improving detergency.