16 results about "Starch Microspheres" patented technology

The invention relates to a slow-release phosphorus removal agent as well as a preparation method and application thereof, in particular to a slow-release phosphorus removal agent for phosphorus pollution of a low-temperature water body as well as a preparation method and application thereof. The slow-release phosphorus removal agent comprises the following components in parts by weight: 1500 parts of potato starch, 160 parts of sodium citrate, 100 parts of ammonium sulfate, 20 parts of sodium chloride, 60 parts of potassium chloride, 10 parts of magnesium sulfate, 10 parts of calcium chloride and 1 part of maltose, wherein the weight ratio of the maltose to the pure water is 1: 20000. The preparation method comprises the following steps: 1, preparing the potato starch-based slow-release medicament; 2, forming and purifying starch microspheres; and step 3, preparing a sustained-release medicament finished product. The method has the beneficial effects that low-temperature water body phosphorus removal flora is efficiently activated, and the phosphate removal efficiency is remarkably improved; the slow-release characteristic meets the low-temperature treatment requirement, and long-acting stable phosphorus control is achieved; and the method is environment-friendly, excellent in economical efficiency and suitable for large-scale application.

The invention belongs to the technical field of starch structure regulation and function modification, and provides a preparation method of heat-resistant and digestion-resistant starch microspheres. The method comprises the following steps: by taking high amylose as a raw material, carrying out acidolysis and debranching treatment to obtain an amylose mixed component, and further carrying out accurate grading on the amylose according to the molecular size through volume exclusion chromatography to obtain an amylose fraction with narrow polymerization degree distribution and uniform chain length. Then recrystallization induction is carried out on the fractions, autoclaving treatment is carried out under the condition that the water content is controlled, amylose molecules are subjected to ordered rearrangement, and the starch microspheres which are compact in structure and high in crystallinity are constructed. The prepared resistant starch microspheres have excellent thermal stability and enzymolysis resistance, and still keep higher resistant starch content after being boiled. The method realizes accurate regulation and control of the chain length of the amylose and synergistic improvement of heat resistance and digestion resistance, is suitable for the fields of functional food and nutrition and health, and has a good application prospect.

The invention provides a microbial fertilizer composition for buffering soil acidity and a preparation method thereof, and relates to the technical field of microbial fertilizers. The microbial fertilizer composition is prepared from straw modified biochar, oyster shell powder, a straw fermentation material, microbial composite microspheres and an organic fertilizer, wherein the straw modified biochar is obtained by performing acid treatment on the straw biochar and then mixing the treated straw biochar with a carboxymethyl cellulose-glucoside solution; the microbial composite microspheres are obtained by mixing and fermenting pectin-starch microspheres and lactobacillus mucus fermentation liquor and completely gelatinized starch solution. The soil conditioner overcomes the defects in the prior art, effectively buffers soil acidity for a long time, further improves soil fertility, and promotes high yield of crops.

This invention discloses a method for preparing UV-resistant modified starch-based composite materials and their application in pesticides, belonging to the field of pesticide technology. The method involves synthesizing UV-resistant mesoporous nanospheres from zinc and aluminum salts using a hydrothermal method, followed by the preparation of photoresponsive modified powder. The UV-resistant mesoporous nanospheres and the photoresponsive modified powder are then combined via a grafting method to obtain photoresponsive UV-resistant mesoporous nanospheres. Subsequently, under alkaline conditions, the photoresponsive UV-resistant mesoporous nanospheres are firmly deposited on the surface of starch microspheres prepared from corn starch using dopamine oxidative self-polymerization and chemical bonding, ultimately yielding a UV-resistant modified starch-based composite material. This material exhibits high pesticide loading capacity, high encapsulation efficiency, excellent UV resistance, and photoresponsive sustained-release properties.

The application discloses a method for lime rock mine area soil reclamation, repair and improvement, which comprises the following steps: mixing citric acid, tartaric acid and water to obtain a first leaching agent; mixing rhamnolipid, quaternary ammonium salt modified chitosan microspheres and water to obtain a second leaching agent; mixing soluble starch, water, biochar powder, microbial inoculum, humic acid, algal powder and potassium dihydrogen phosphate, then adding the mixture into a mixed solution prepared by mixing liquid paraffin and span 80, and adding epichlorohydrin to react to obtain slow-release starch microspheres; and mixing the slow-release starch microspheres and water to obtain a soil improvement agent; ploughing the surface soil of the lime rock mine area, and sequentially using the first leaching agent, the second leaching agent and water for leaching treatment; and spraying the soil improvement agent into the surface soil. The application can effectively improve the acid-base property of the lime rock mine area soil, improve the soil fertility, and reduce the metal such as iron, copper and manganese and the toxic and harmful substances such as sulfate in the soil.

The invention relates to an embolism microsphere with a photothermal effect and a preparation method and application thereof, and belongs to the technical field of embolism microspheres. The preparation method comprises the following steps: mixing starch and a cross-linking agent in water to obtain an aqueous phase solution; adding the water-phase solution into the oil-phase solution, and carrying out reversed-phase suspension polymerization reaction to obtain starch hydrogel microspheres; wherein the cross-linking agent comprises at least one of sodium trimetaphosphate or sodium tripolyphosphate; oxidizing the starch hydrogel microspheres with sodium periodate to obtain oxidized starch microspheres; the oxidized starch microspheres are subjected to surface modification by adopting dopamine, a polydopamine coating layer is formed on the surfaces of the oxidized starch microspheres, and the embolism microspheres with the photothermal effect are obtained. The embolism microspheres have degradability and drug loading performance at the same time, embolism-chemotherapy-photothermal triple therapy is cooperated, drug release can be controlled through the photothermal effect, and therefore the embolism microspheres can be effectively used for TAE or TACE treatment.

This invention belongs to the field of pigment technology and discloses a natural mineral-based traditional Chinese painting pigment for ceramic slabs and its preparation method. The pigment constructs a dual-synergistic system of natural mineral chemical color development and micro / nano-structured optical color development. By precisely proportioning chemically coloring minerals and layered optical minerals, it achieves a dual visual effect of warm, lustrous base color and translucent sheen in traditional Chinese painting. The introduction of natural active silica minerals allows the pigment and ceramic slab to form Si-O-M (M being metal ions in the mineral) covalent bonds in situ during firing, achieving integrated fusion. A hierarchical porous structure is constructed using a natural starch microsphere template method to precisely replicate the textural effects of traditional Chinese painting on paper. The pigment preparation process includes mineral pretreatment, directional mixing, molding and coating, and two-stage firing. The entire process involves no synthetic raw materials and no wastewater discharge, making it green and environmentally friendly.

The invention relates to a porous starch microsphere as well as a preparation method and application thereof, and belongs to the technical field of embolism microspheres. The preparation method comprises the following steps: heating and gelatinizing starch in an alkaline aqueous solution, and adjusting the pH value to 7-8 to obtain a starch solution; mixing the starch solution, a cross-linking agent and a polyvinyl alcohol aqueous solution to obtain a water phase; wherein the cross-linking agent comprises sodium trimetaphosphate and / or sodium tripolyphosphate; mixing the water phase and the oil phase, and carrying out a cross-linking reaction to obtain gel microspheres; and placing the gel microspheres in water, and heating until the polyvinyl alcohol is dissolved to obtain the porous starch microspheres. Starch is used as a raw material, polyvinyl alcohol and sodium trimetaphosphate and / or a sodium tripolyphosphate cross-linking agent are not easy to react, and a porous structure with a controllable aperture is formed in situ, so that various types of drugs can be effectively embedded and loaded, and efficient loading and slow release of the drugs are realized in combination with the degradable characteristic of the starch.

The invention relates to the field of ceramic filter preparation, in particular to a recrystallized silicon carbide honeycomb ceramic filter and a preparation method thereof. The preparation method comprises the following steps: carrying out ball milling on 8-15 parts by mass of nano silicon carbide whiskers, 65-85 parts by mass of fine silicon carbide powder, 1-5 parts by mass of boron-doped graphene, 2-5 parts by mass of starch microspheres and 1-3 parts by mass of sodium bicarbonate for 20-30 hours; after ball milling, the mixture is subjected to vacuum impregnation in a polycarbosilane solution to be uniformly dispersed; after removing bubbles through vacuum pugging, extruding to prepare a honeycomb biscuit; drying for 1-2 hours in stages at the temperature of 60-120 DEG C, and then heating to 550-650 DEG C; the pressure of 40-60 MPa is applied to a graphite mold, the temperature is increased to 1600-1800 DEG C under the protection of argon, and heat preservation is conducted for 1.5-2.5 h; raising the temperature to 2000-2200 DEG C, and keeping the temperature for 2-3 hours; and coating a nano silicon carbide coating on the surface of the pore channel by plasma spraying. According to the recrystallized silicon carbide honeycomb ceramic filter, the trapping efficiency of particles with the particle size larger than or equal to 2.5 micrometers reaches 99% or above, the compressive strength is larger than 350 MPa, the thermal shock resistance frequency is 50 or above, and the mechanical property and the high temperature resistance are good.

The invention provides an environment-friendly high-temperature-resistant porous starch microsphere blocking agent for drilling fluid, a method and application, raw materials comprise gelatinized porous corn starch emulsion, grafting monomers, a cross-linking agent and an initiator, the blocking agent is obtained by mixing the raw materials, the grafting monomers comprise amide monomers and temperature-resistant monomers, and the cross-linking agent comprises a cross-linking agent and an initiator. The mass ratio of the amide monomer to the temperature-resistant monomer is 1.0-3.5. According to the invention, the amide monomer and the temperature-resistant monomer are grafted and substituted on the porous corn starch, so that the obtained modified porous corn starch is uniform in particle size and good in temperature resistance and environmental protection performance, can be used as a plugging agent at a high temperature of 180 DEG C, and can ensure the environmental protection requirements of most regions on additives for drilling fluids.

The invention relates to the technical field of starch microspheres, in particular to fragmented starch microspheres with high digestion resistance and a preparation method and application thereof, and the preparation method comprises the following steps: preparing short amylose from native starch; the method comprises the following steps: mixing short amylose and gellan gum, dispersing the mixture in deionized water to obtain a pre-gelatinizing solution, injecting the pre-gelatinizing solution into a dispersed phase channel of a microfluidic device, injecting a calcium chloride solution into a continuous phase channel of the microfluidic device, and enabling the pre-gelatinizing solution to form uniform liquid drops in the calcium chloride solution; transferring the liquid drops into a calcium chloride solution, standing, cross-linking and curing to obtain short amylose-gellan gum resistant starch beads; and performing gradient crushing after freezing, and sieving after unfreezing to obtain the crushed starch microspheres. By adopting the steps and adopting a freezing-crushing combined technology, the RS content of resistant starch of the obtained high-crushing type starch microspheres still reaches 14.63%, and the traditional cognition that crushing can cause damage to a starch anti-digestion structure and the RS content is suddenly reduced is thoroughly broken through.

This invention relates to the field of flame-retardant boards and discloses a method for preparing an intumescent flame-retardant board. The method uses an intumescent flame retardant to treat the board with flame retardancy. The carbon source of the intumescent flame retardant is nano-calcium carbonate modified starch. The nano-calcium carbonate modified starch consists of starch microspheres and a nano-calcium carbonate shell coated on the starch microspheres. Compared with ordinary starch, the nano-calcium carbonate modified starch requires less material, has a higher carbon source utilization rate, higher thermal stability, higher char formation rate, higher char formation stability, and excellent flame retardant effect.

This invention aims to provide an antifreeze starch microsphere, its preparation method, and its application in frozen glutinous rice balls. Specifically, using waxy starch as raw material, the process involves high-temperature pregelatinization, pullulan enzymatic debranching, and stepwise alcohol precipitation and fractionation to introduce phenolic acids to form a single-helix complex with starch molecules. Subsequently, entropy reduction is used to promote the orderly arrangement of molecular chains, ultimately yielding spherical starch microspheres with an A-type crystalline structure. The obtained starch microspheres are mixed with glutinous rice flour and water in a certain proportion to prepare glutinous rice balls with a diameter of approximately 2.0 cm. These glutinous rice balls not only have excellent taste and significantly improved digestibility, but also exhibit a significantly reduced cracking rate after freeze-thaw cycles, thus effectively improving the storage stability and edible quality of frozen glutinous rice balls.

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.

This invention discloses an N ε This paper describes the encapsulation of natural starch microspheres with fatty acyl lysine, its preparation method, and its application, belonging to the field of cosmetic technology. The method involves encapsulating natural starch microspheres with N-fatty acyl lysine. ε - Fatty acyl lysine dissolves in the presence of an acid-co-solvent to yield N ε - Acidic solution of fatty acyl lysine; slowly add N dropwise to starch gelatinization solution. ε Acidic solution of -fatty acyl lysine was added dropwise. After addition, the solution was kept warm and stirred to induce crystallization. Then, the pH and temperature were adjusted to allow for further crystallization. The precipitated crystals were separated by filtration, centrifugation for dehydration, drying, and pulverization to obtain N. ε Natural starch microspheres are encapsulated with fatty acyl lysine. These microsphere powders have excellent hydrophobic properties, good powder flowability, good powder molding properties, strong skin adhesion, and long-lasting makeup effect. They can be widely used in the fields of makeup, skin care, and daily chemical products.

The invention provides modified dietary fiber with satiety and a preparation method of the modified dietary fiber. The preparation method comprises the following steps: soaking plant raw materials at 4 DEG C, performing liquid nitrogen freezing and crushing to 30-50 microns, and performing vacuum drying to obtain superfine powder; carrying out step-by-step enzymolysis on the superfine powder through four enzymes (alpha-amylase, alkaline protease, pectin lyase and cellulase) to obtain enzymatic hydrolysate; adding degradable starch microspheres, stirring, standing at low temperature, centrifugally washing, freezing, and removing the microspheres through saccharifying enzyme to obtain hierarchical porous dietary fibers; after urea-glycerol regulation and high-speed shearing, gradient pulse microjet treatment, low-temperature heat preservation and drying are adopted, and a finished product is obtained. The modified dietary fiber with a high specific surface area and a multi-stage through pore channel structure is constructed through a pore forming technology and gradient pulse microjet, a foundation is laid for an efficient satiety function from the physical structure level, and the technical problems that traditional dietary fibers are single in pore channel and insufficient in adsorption and expansion performance are solved.