13 results about "Starch solution" patented technology

The application discloses a preparation method of starch-unsaturated fatty acid compound. The method comprises the following steps: starch is pretreated by a debranching enzyme to obtain a debranched starch solution, the debranched starch solution is mixed with unsaturated fatty acid, an ethanol-water solution is added as a ball milling medium, a multi-stage ball milling parameter dynamic regulation process is adopted, and low-temperature protection, medium-temperature complexing and cooling solidification stage ball milling reactions are sequentially carried out, and finally, drying, crushing and sieving are performed to obtain the starch-unsaturated fatty acid compound. Through the synergistic effect of debranching enzyme pretreatment and multi-stage ball milling, the starch and the unsaturated fatty acid are efficiently compounded under mild conditions. The obtained compound has high compounding rate, high resistant starch content and excellent antioxidant stability. The compound can be used as a low-glycemic index functional food raw material and is used for preparing blood glucose management, weight control or antioxidant functional food. The method is mild, controllable and reproducible, does not need high temperature and high pressure, and meets the clean label consumption trend.

This application relates to the field of papermaking technology, and more particularly to a cationic cassava starch and its preparation method, apparatus, and application. The preparation method involves repeatedly statically mixing 60%–69% etherifying agent with 5%–15% caustic soda solution, adding 35%–42% cassava starch solution within 10–30 seconds, mixing, sieving, and then undergoing an etherification reaction to obtain cationic cassava starch. The apparatus includes an etherifying agent storage unit, a caustic soda solution storage unit, a raw material mixing unit, a cassava starch solution supply unit, a mixing and sieving unit, a reaction unit, controllable valves, a timer, and a control unit. Two storage units are connected to the raw material mixing unit, which is connected to the mixing and sieving unit via valves. The starch solution supply unit is also connected to it, and subsequently to the reaction unit. The control unit regulates the opening and closing of the valves to ensure the mixing of the solution is completed within 10–30 seconds. The application is the use of cationic cassava starch in papermaking. It is evident that the preparation method of this application can avoid gelatinization caused by excessively high local concentration when starch is mixed with alkali solution, and reduce the generation of impurities; the wet process can flexibly control the degree of substitution to adapt to paper machine production, eliminate the drying process, and produce wet cationic tapioca starch with stable degree of substitution, excellent quality, which can be directly supplied to paper machines and has good retention and filtration effects.

This utility model relates to the technical field of starch production equipment, and more particularly to a thickener for soluble starch production, comprising a thickening tank, a fixed frame, and a crossbeam. The fixed frame is fixedly installed at the lower end of the thickening tank, and the crossbeam is fixedly installed at the upper end. Guardrails are installed on both sides of the crossbeam, and a base is installed at the lower end of the crossbeam. A liquefying enzyme spray pipe is installed on one side of the thickening tank, and the other side of the liquefying enzyme spray pipe is fixedly installed in the base. With this thickener, the liquefying enzyme spray pipe can evenly spray the liquefying enzyme onto the surface of the starch solution in the thickening tank, ensuring full contact between the liquefying enzyme and the starch, and improving the liquefaction efficiency of the starch. The nozzle is equipped with an atomizing nozzle, allowing the liquefying enzyme to be sprayed in a fine mist, further improving the liquefaction effect. The layout of the annular electric heating tube can evenly heat the starch solution in the thickening tank, improving heating efficiency and effectively preventing heat waste caused by localized overheating or undercooling of the liquid.

This invention discloses a method and application for preparing whey protein isolate microgels based on enzymatic hydrolysis of OSA-modified starch, belonging to the field of emulsion gelation technology. The preparation of the whey protein isolate microgels of this invention includes the following steps: dissolving OSA-modified starch in phosphate buffer, gelatinizing in a boiling water bath, cooling, adding pullulanase for enzymatic hydrolysis, boiling to inactivate the enzyme, then adding β-amylase for secondary enzymatic hydrolysis, centrifuging, collecting the supernatant, and freeze-drying to obtain EOSA starch; preparing whey protein isolate solutions and EOSA starch solutions separately, mixing them at a 1:1 volume ratio, homogenizing, and obtaining the final microgel. The microgel particles have a smooth surface and a uniform gel network structure; they can effectively stabilize the emulsion morphology, exhibiting good storage and thermal stability; furthermore, they are suitable for the preparation of swallowable foods, and the degree of enzymatic hydrolysis of OSA-modified starch can be adjusted to control the swallowability grade, adapting to different swallowability requirements.

Provided in the present application is a preparation method for starch hydrogel microspheres, belonging to the technical field of embolic microsphere manufacturing. The preparation method for starch hydrogel microspheres comprises the following steps: adding a first crosslinking agent to a starch solution and mixing to obtain an aqueous phase solution; adding an oil phase solution to the aqueous phase solution and mixing to obtain a mixed liquid; and adding a second crosslinking agent to the mixed liquid and mixing for reaction to obtain the starch hydrogel microspheres. The starch hydrogel microspheres prepared by the method feature such advantages as long in-vivo degradation time and adjustable degradation time, and can be applied to a wide range of disease types.

The present application relates to the technical field of fiber foaming material, more particularly to a preparation process and system of fiber foaming slurry.The fiber foaming slurry is prepared by 100-200 parts by mass of organic fiber material, 100 parts by mass of starch is emulsified and then heated to paste to obtain a paste starch solution with a water content of 30%-85%, 100-1000 parts by mass of inorganic structural powder material is prepared, and the fiber foaming slurry is obtained by stirring.The fiber foaming slurry is added to a mold, the mold is heated synchronously by means of mold pressing forming, the fiber foaming slurry in the mold is solidified into the shape of the cavity of the mold, and the fiber foaming profile is obtained.The present application improves the safety of fiber foaming material and reduces the cost of fiber foaming material.

The application discloses a high-charge-density starch grafting phenylpropyl AKD surface sizing agent and a preparation method and application thereof. The sizing agent is prepared from the following raw materials in parts by weight: starch 4-7.5 parts, liquid alkali 1-2 parts, etherification agent 0.7-1.5 parts, dispersing agent 0.2-0.5 parts, pH regulator 2-8 parts, initiator 0.5-1.5 parts, vinyl monomer 7-15 parts, AKD 3-10 parts, stabilizer 0.1-0.3 parts and deionized water 40-65 parts. The preparation method comprises the following steps: first, preparing a cationic modified starch solution, then grafting and copolymerizing styrene and acrylate monomers to obtain a brownish semi-transparent nanoemulsion, and finally compounding the nanoemulsion with AKD after emulsification, and then obtaining the sizing agent through high-pressure homogenization. The charge density of the sizing agent reaches 300-550 mu eq / g, the particle size is 100-250 nm, the sizing agent can significantly improve the water resistance, ring crush strength and moisture resistance when used for paper surface sizing, has no curing period, has good storage stability, and is suitable for packaging paper and cultural paper.

This invention provides a microbial fertilizer composition for buffering soil acidity and its preparation method, relating to the field of microbial fertilizer technology. The microbial fertilizer composition comprises modified straw biochar, oyster shell powder, fermented straw material, microbial composite microspheres, and organic fertilizer. The modified straw biochar is obtained by treating straw biochar with acid and then mixing it with a carboxymethyl cellulose-glucosinolate solution. The microbial composite microspheres are obtained by mixing pectin-starch microspheres with fermented Lactobacillus mucilage fermentation broth and a fully gelatinized starch solution. This invention overcomes the shortcomings of existing technologies, effectively buffering soil acidity over a long period while further improving soil fertility and promoting high crop yields.

A method for starch degradation includes the following steps. Acetylated adipic acid distarch, acid and polar solvent are mixed to form a starch suspension. The temperature of the starch suspension is adjusted to -23℃ to 47℃, and a degradation reaction is performed to form a first degraded starch solution. A base is added to raise the pH value of the first degraded starch solution to obtain a second degraded starch solution. The method for starch degradation has the advantage of simple process. A method for making an oil-proof composite layer includes the following steps. Acetylated adipic acid distarch with a weight average molecular weight of 3.00×10 6 to 5.50×10 7 and a polar solvent are mixed to obtain a starch solution. The starch solution is gelatinized to form a gelatinized starch solution. The gelatinized starch solution is attached to a substrate and a drying process is performed to form an oil-proof composite layer. The oil-proof composite layer has good oil-proof degree and can be applied to various packaging containers that require oil-proof isolation, especially food packaging containers, which has great industrial applicability.

The application provides preparation of a starch-based coagulant and application thereof in microplastic removal, and belongs to the field of water treatment materials.The method comprises the following steps: mixing starch and deionized water, and then adjusting the pH value to obtain starch milk; adding sodium hydroxide into the starch milk, and stirring and reacting at constant temperature for 30-40 min to obtain pretreated starch milk; adding acrylamide, dimethyl diallyl ammonium chloride and an initiator into the pretreated starch milk at 35-45 DEG C, and stirring and reacting at constant temperature to obtain a grafted copolymer starch solution; adding nano-montmorillonite into the grafted copolymer starch solution, and then adding polydopamine, adjusting the pH value, and stirring and reacting for 40-60 min to obtain a crude composite coagulant; and vacuum drying and crushing the crude composite coagulant to obtain a starch-based coagulant.The method can overcome the defects of low microplastic removal efficiency, complex preparation process and insufficient environmental friendliness of the starch-based coagulant in the prior art.

This invention discloses a high charge density starch-grafted styrene-acrylic surface sizing agent, its preparation method, and its application. The sizing agent is made from the following raw materials in parts by weight: 5-12 parts starch, 1.5-2 parts liquid alkali, 1.5-3 parts etherifying agent, 0.5-1.5 parts dispersant, 4-10 parts pH adjuster, 1.5-2.5 parts initiator, 10-20 parts vinyl monomer, and 40-60 parts deionized water. The preparation method includes: first preparing a cationic modified starch solution, then grafting and copolymerizing it with styrene and acrylate monomers, followed by dropwise polymerization and a heat-preserving reaction to obtain a brown, semi-transparent nanoemulsion. The sizing agent of this invention has a charge density as high as 300-550 μeq / g, a particle size of 50-90 nm, and a solid content of 29%-31%. When used for sizing paper surfaces, it can effectively neutralize anionic waste, enhance electrostatic adsorption with fibers, significantly improve paper surface strength and water resistance, has a fast curing speed, is environmentally friendly, and is suitable for various paper products such as packaging paper and cultural paper.

This invention discloses a kumquat preservative and its preparation method, belonging to the technical field of fruit preservatives. The kumquat preservative comprises the following raw materials: oxalis extract, soluble starch, and an appropriate amount of water; the total phenolic content of the preservative is 250-310 mg / g, and the total flavonoid content is 10-30 mg / g. The mass concentration of the oxalis extract prepared with water is 0.05-0.1 g / mL; the mass concentration of the soluble starch prepared with water is 0.06-0.2 g / mL. The preparation method of the preservative includes: S1, weighing the oxalis extract to prepare an oxalis extract solution; S2, weighing the soluble starch to prepare a starch solution; S3, mixing the oxalis extract solution and starch solution at a volume ratio of 1:1-1.3 and stirring for 40-50 min; S4, allowing it to stand for another 5-10 min to obtain the preservative. The preservative in this application is a compound of natural sage extract and food-grade soluble starch, with no chemical residue, safe and biodegradable, solving the safety hazards of traditional chemical preservatives; kumquats soaked in the preservative still have a good preservation effect after 15 days, extending their shelf life.