573 results about "Modified starch" patented technology

The invention discloses a large-size green packaging carton and a preparation process thereof, and relates to the field of packaging box preparation. The environment-friendly composite material comprises the following raw materials in parts by weight: 50-80 parts of plant fiber slurry, 10-25 parts of a modified starch-based adhesive, 5-15 parts of a nanoscale inorganic reinforcing filler, 1-5 parts of a degradable water repellent agent, 0.5-3 parts of a cross-linking agent and 2-8 parts of starch and plant fiber composite buffer microspheres. According to the preparation method, full-environment-friendly raw materials such as plant fiber slurry and a modified starch-based adhesive are selected and matched with starch and plant fiber composite buffer microspheres, and optimized processes such as segmented temperature control pressurization molding, adhesive gelatinization treatment, stirring speed reduction and microsphere structure protection are combined; and through coating of the degradable polymer coating and micron-sized hydrophobic texture imprinting, synergistic improvement of high compressive strength, excellent buffering performance, excellent hydrophobic and damp-proof effects and high degradation rate of the carton is achieved.

The invention discloses a preparation method of high-viscosity cationic starch, which belongs to the technical field of modified starch, and comprises the following steps: crosslinking epichlorohydrin, ball-milling and cationizing; the epoxy chloropropane crosslinking comprises the following steps: mixing starch, calcium hydroxide and deionized water, stirring at 40-50 DEG C, adding sodium stearoyl lactylate, stirring at 50-55 DEG C, naturally cooling to room temperature, adding sodium chloride and epoxy chloropropane, stirring, dropwise adding a potassium hydroxide aqueous solution, stirring, adjusting the pH value to 6, filtering, taking filter residues, washing and drying to obtain crosslinked starch; in the step of ball milling, calcium hydroxide, sucrose fatty acid ester SE-11 and deionized water are mixed and then subjected to ball milling, and a ball-milled material is obtained; the prepared high-viscosity cationic starch is high in paste liquid viscosity and cationic substitution degree, good in paste liquid viscosity stability, uniform in substitution degree and paste liquid viscosity, high in reaction efficiency in cationization and low in alkali consumption.

The invention relates to the technical field of adhesives, and particularly discloses a low-formaldehyde environment-friendly adhesive and a preparation method thereof. The invention relates to a low-formaldehyde environment-friendly adhesive which is prepared from the following raw materials in parts by mass: 30-50 parts of modified starch, 15-25 parts of vegetable protein, 5-10 parts of modified nano cellulose, 2-5 parts of a composite cross-linking agent and 80-150 parts of water, the composite cross-linking agent comprises amino silane and polyaspartic acid; the modified starch is prepared by performing graft copolymerization on starch subjected to enzymolysis by alpha-amylase and composite anhydride; the vegetable protein is subjected to alkalization and heat treatment before being used; the modified nano-crystalline cellulose is prepared by performing ring-opening etherification reaction on nano-crystalline cellulose, epoxypropane and ethylene oxide in sequence. The low-formaldehyde environment-friendly adhesive prepared by the invention has relatively good bonding strength and relatively low formaldehyde emission.

The invention provides a starch-based soft capsule composition, a starch-based soft capsule and a preparation method of the starch-based soft capsule, and belongs to the technical field of medicines. The starch-based soft capsule composition is characterized by being prepared from the following components in parts by weight: 50 to 100 parts of plant starch, 20 to 100 parts of modified starch, 0.1 to 5 parts of thickening agent and 0.1 to 5 parts of plasticizer, the plant starch comprises pea starch and corn starch in a mass ratio of (10-60): (40-50); the modified starch comprises modified corn starch and modified potato starch in a mass ratio of (1-5): (1-8). The starch-based soft capsule disclosed by the invention is high in joint closing rate; the starch-based soft capsule is high in transparency, not easy to age and good in stability after being stored for a long time.

The invention discloses a bio-based polymer emulsion as well as a preparation method and application thereof, and belongs to the technical field of aqueous polymer emulsions. The emulsion comprises an aqueous continuous phase, bio-based polymer particles, a stabilizing system, and a bionic catechol adhesion component. Specific modified starch is innovatively utilized for assistance, and a bionic adhesion shell layer is constructed on the surface of a bio-based polymer core in situ. Compared with similar products in the market that adhesion to inert substrates can be improved only by adding a large amount of tackifying components, the scheme has the advantages that excellent dry and wet adhesion can be realized on the surfaces of difficult-to-adhere substrates such as polypropylene and polyethylene only by constructing an extremely thin interface functional layer, and the functionalization efficiency and economical efficiency of the bio-based material are greatly improved. Meanwhile, the system effectively overcomes the industrial problem that the high-solid-content emulsion is easy to settle, has excellent storage stability and construction adaptability, and conforms to the development trend of sustainable barrier packaging and high-performance water-based coatings in the future.

The application provides a starch-indole acid derivative and a preparation method and application thereof, and relates to the technical field of modified starches. The starch-indole acid derivative refers to esterified starch generated by esterification reaction of starch, a condensing agent and alkali and indole acid. The starch-indole acid derivative has high resistance and can resist degradation of the stomach and small intestine. After reaching the colon site, the starch-indole acid derivative can be fermented by intestinal flora to release indole acid beneficial to intestinal health. Compared with traditional drug delivery modes such as intragastric administration and intraperitoneal injection, the starch-indole acid derivative has obvious advantages and can significantly increase the content of indole acid in the colon and hepatic portal vein blood. In addition, indole acid can activate an aromatic hydrocarbon receptor to play an immunoregulatory role. The immunoregulatory role of indole acid is superimposed on the regulation role of short-chain fatty acids released by starch fermentation by intestinal flora, so that a product playing an immunoregulatory role through multiple immune system signal pathways is provided.

The invention discloses a production process of high-stiffness embossed aluminum foil composite paper. The production process comprises the following steps: (1) selecting and treating raw materials; (2) gluing treatment: uniformly coating the front surface of the lining paper with a modified adhesive by using a coating machine, wherein the modified adhesive comprises modified starch, water, konjac glucomannan, a polyamide curing agent, an accelerant, aluminum sulfate, an AKD emulsion and a defoaming agent; (3) aluminum foil compounding: the aluminum foil is unreeled and attached to the modified adhesive, and then extrusion compounding is performed through a compression roller; (4) embossing and forming: embossing the front surface of the aluminum foil of the aluminum foil composite paper by adopting a heating embossing roller; (5) curing treatment: coating a curing agent on the front surface of the aluminum foil of the aluminum foil composite paper by adopting a micro-concave net roller; and (6) cooling and rolling. The stiffness of the aluminum foil composite paper is effectively enhanced, the bonding capacity between the aluminum foil and the lining paper is enhanced, the smoothness of the surface of the aluminum foil composite paper is remarkably enhanced, the attractiveness is enhanced, and the wear resistance of the aluminum foil composite paper is enhanced.

The invention discloses a Trichoderma harzianum-containing biocontrol fertilizer and a preparation method thereof, and belongs to the technical field of mixed fertilizers, the fertilizer comprises composite matrix particles (containing an organic carrier, an inorganic fertilizer and trace elements), a microsphere coating layer (composed of sodium alginate / chitosan gel microspheres) coated with Trichoderma harzianum on the surface, and a water-soluble fertilizer coating layer (composed of sodium alginate / chitosan gel microspheres) coated with Trichoderma harzianum on the surface, and the outermost layer is a biodegradable protective film (modified starch / PVA / PLA). The preparation method comprises the following steps: granulating a matrix, preparing a bacterial suspension, forming bacteria-containing gel microspheres (the spore recovery rate is greater than or equal to 95%), attaching the microspheres to the matrix, and coating the outer layer. According to the structure, the survival rate of viable bacteria stored at room temperature for 120 days is larger than or equal to 68.3%, the rhizosphere bacterial count is larger than or equal to 4.58 * 10 < 6 > CFU / g soil after the viable bacteria are applied to the soil for 30 days, soil-borne diseases are remarkably inhibited, and the crop yield is increased by 13.5% (cucumber yield is increased by 13.5%).

The invention relates to the technical field of building material preparation, and particularly discloses a preparation process of a low-temperature fluid curing agent and a stabilized soil building material thereof, and the preparation process comprises the following steps: (1) adding modified starch into water, uniformly stirring, and removing oxygen; then adding maleic anhydride and persulfate, and heating to react; and after the reaction is finished, adding ethanol, separating out the precipitate, and drying to obtain the CMSS-g-MA. (2) adding glycine betaine into water, uniformly stirring, then adding CMSS-g-MA, and heating to react; and carrying out spray drying on the obtained reaction liquid to obtain the modified betaine powder. And (3) taking sulphoaluminate cement, ordinary Portland cement, a polycarboxylate superplasticizer, a silane coupling agent, the modified betaine powder, hydroxyethyl cellulose and the like as raw materials, and uniformly mixing the raw materials to obtain the low-temperature fluid curing agent. The solidified soil slurry can be better prevented from being frozen in a low-temperature environment, the stability of the internal structure of the solidified soil is kept, and a guarantee is provided for low-temperature construction.

The invention provides an antibacterial high-barrier starch-based plastic bottle and a preparation method thereof.The preparation method comprises the steps that firstly, titanate generates nano titanium dioxide in situ in starch through acid catalysis, starch is subjected to in-situ hybridization modification, and nano titanium dioxide in-situ hybridization starch is prepared; then adding nano inorganic barrier powder, and then adding a long-chain silane coupling agent to modify the nano titanium dioxide in-situ hybridized starch and the nano inorganic barrier powder to obtain a modified starch compound; performing vacuum kneading and drying until the water content is lower than 0.5%, and adding an antibacterial lubricant for plasticizing to obtain a plasticized material; and finally, carrying out melt blending and granulation with polyolefin resin, and carrying out extrusion blow molding. The environment-friendly and low-cost starch-based material is kept, meanwhile, the comprehensive performance of the product is remarkably improved, the surface contact angle of the product is 110 degrees or above, the antibacterial rate is 97% or above, and the oxygen permeation amount and the water vapor permeation amount are 100 cm / (m.24h. Atm) and 4 g / (m.24h) or below respectively.

The embodiment of the invention discloses a degradable filling plastic master batch and a preparation method thereof. The degradable filling plastic master batch comprises the following components: a bio-based material, an accelerant, a lubricant, a modifier, an antioxidant, a cross-linking agent and a coupling agent, wherein the bio-based material is polylactic acid; the accelerant is modified starch; the plastic modified material is calcium carbonate; the modifying agent comprises pe wax and / or ebs; the lubricant comprises zinc stearate and POE (Polyolefin Elastomer); the antioxidant is a composition of lignin and phosphite ester; the cross-linking agent is triallyl isocyanate, and / or epoxidized soybean oil; the coupling agent is a silane coupling agent or an aluminic acid coupling agent, can provide the strength of the degradable filling master batch, is not prone to deformation during stretching, has an anti-oxidation effect, is more reinforced and durable, and can achieve the purpose of rapid degradation after waste treatment.

The invention belongs to the technical field of building materials, and discloses a concrete composite additive and a preparation method thereof. The additive comprises a polycarboxylate superplasticizer, nano silicon dioxide, modified starch ether, bentonite, a calcium sulphoaluminate activator, a bio-based antirust agent and a graphene oxide dispersion liquid. Through a step-by-step mixing process, liquid phase dispersion is performed firstly, then solid phase gradient mixing is performed, and ultrasonic treatment and low-temperature drying are combined, so that the problem of multi-component interface compatibility and activity retention is solved. The obtained additive can synergistically improve the anti-cracking and anti-rust performance of concrete, significantly reduce chloride ion penetration and prolong the durability period. And the preparation method is environment-friendly, efficient and suitable for high-durability concrete engineering.

The invention discloses a degradable film blowing material and a processing technology thereof, and relates to the technical field of degradable film blowing materials, the degradable film blowing material comprises the following preparation raw materials by mass: 50-70 parts of modified polylactic acid, 20-50 parts of PBAT resin, 5-20 parts of modified starch, 3-10 parts of nano calcium carbonate, 2-5 parts of talcum powder, 1-5 parts of a dispersant, 1-5 parts of a plasticizer, 0.1-1.0 part of an antioxidant and 0.5-1.5 parts of a lubricant. The processing method comprises the following steps: S1, drying modified polylactic acid and PBAT resin, and plasticizing modified starch; s2, mixing the preparation raw materials of the degradable film blowing material, extruding, and granulating to obtain degradable master batches; and S3, carrying out film blowing molding on the degradable master batch to obtain the degradable film blowing material. The degradable film blowing material is relatively high in tearing strength and notch impact strength, and still keeps a relatively high degradation rate.

The invention relates to the technical field of biological medicines, and discloses an alpha-ketoglutaric acid composite liposome as well as a preparation method and application thereof. Alpha-ketoglutaric acid is preliminarily entrapped by lecithin and cholesterol to prepare a basic liposome, and then enzymolysis silkworm pupa protein is introduced to the surface of the liposome, so that the enzymolysis silkworm pupa protein and a lipid bilayer are subjected to hydrophobic and hydrogen-bond interaction to form a protein-lipid composite layer, and the stability of a membrane structure is enhanced; and the positively charged arginine modified starch is further deposited on the surface of the liposome to form a polysaccharide-protein-lipid composite layer, so that the electrostatic locking of the negatively charged alpha-ketoglutaric acid is realized, and the encapsulation efficiency and the controlled release performance are further improved. The alpha-ketoglutaric acid composite liposome provided by the invention has the advantages of being high in stability, safe to eat, high in encapsulation efficiency, good in gastric acid resistance stability and the like, has a good slow release characteristic, and can be applied to the fields of sports nutritional supplements, antioxidant products or anti-aging products and the like.

The invention discloses a high-toughness carton and a preparation method thereof, and relates to the technical field of papermaking and environment-friendly packaging materials. The carton is made of a high-toughness composite corrugated board, and raw materials of the carton comprise main material pulp fibers, cross-linked modified nanocellulose, a modified starch adhesive, a wet strength agent and a rheology modifier. The cross-linked modified nano-crystalline cellulose is nano-crystalline cellulose of which the surface is grafted with a hyperbranched supramolecular cross-linking agent. According to the method, by preparing the nanocellulose with the surface grafted with the hyperbranched cross-linking agent, a mechanism capable of dissipating energy is constructed in a fiber network, and compared with the prior art, the defect that regenerated fibers are large in brittleness can be effectively overcome, and the dynamic impact toughness of the carton is remarkably improved. By using the modified starch adhesive disclosed by the invention, an adhesive layer has better ductility and interlayer binding force, and when a paperboard is stressed and deformed, the adhesive layer can be deformed along with the deformation and is not easy to break, so that the stability of interlayer binding is favorably kept.

This invention provides a microcapsule-based deodorizing cat litter, a concentrated granular cat litter, its preparation method, and its application, belonging to the field of cat litter preparation technology. The invention uses a complex of modified starch, gum arabic, polyvinylpyrrolidone, and sorbitol as the wall material to encapsulate fragrances and / or enzymes, resulting in microcapsules. The cat litter prepared from these microcapsules achieves intelligent targeted deodorization. The wall material ruptures upon contact with moisture in urine or feces, precisely releasing the active ingredients, allowing for a slow and continuous release of the deodorizing components. The cat litter provided by this invention exhibits excellent deodorization, as well as good water absorption, dust control, and clumping properties. This cat litter successfully balances superior functionality, production feasibility, and cost control, making it a high-end cat litter with significant market potential.

The present invention provides a starch food for which aging is suppressed.　Provided is a method for producing a starch food, the method comprising adding (1) maltotriosyl transferase, (2) a mineral or a salt thereof selected from calcium and magnesium, and (3) water to a starch food raw material. The mineral or a salt thereof in (2) is added in an amount that, if dissolved in the water in (3), makes a solution having a concentration of 0.15 mM to 75 mM. Also provided is a method for suppressing aging of starch foods. Further provided is an enzyme preparation that contains maltotriosyl transferase and a mineral selected from calcium and magnesium or a salt thereof.

This invention discloses an ionic liquid graft-modified starch-based filtration loss reducer, its preparation method, and its application. The filtration loss reducer comprises cross-linked starch and 50%–300% by weight of polymeric monomers of the cross-linked starch; wherein the cross-linked starch comprises starch and 0.1%–5% by weight of a cross-linking agent; the polymeric monomers are a composition of alkenylamide monomers, alkenyl sulfonic acid monomers, polymerizable imidazole salt ionic liquid monomers, and N-vinylpyrrolidone monomers. The embodiments of this invention improve the temperature resistance of the starch itself by using a cross-linking agent; improve the temperature resistance of the polymer by using sulfonic acid groups and pyrrolidone; and simultaneously introduce imidazole salt ionic liquids, which not only promote the dispersion of clay particles but also improve the quality of the filter cake, thereby reducing filtration loss.

Described herein is an easy-to-compost water based adhesive composition and the preparing method thereof. The compostable water-based adhesive composition, comprising (a) at least one vinyl acetate-ethylene copolymer, (b) at least one phosphoric acid-modified starch, (c) at least one vegetable oil, and (d) water, wherein the composition has a solid content of larger than 20%.

This invention discloses a composite fruit and vegetable preservation film prepared using seaweed extract and its preparation method. The method includes: 1) weighing the following raw materials by weight: 100-150 parts seaweed extract, 5-10 parts chitosan, 6-12 parts polyvinyl alcohol, 5-15 parts sodium carboxymethyl starch, 1-4 parts modified starch, 1-6 parts seaweed oligosaccharide, 1-3 parts polyacrylamide, 1-5 parts sodium humate, 2-5 parts glycerol, and 2-6 parts potassium citrate; 2) mixing chitosan with seaweed extract; 3) adding sodium carboxymethyl starch and modified starch to the obtained mixture to obtain a premix; 4) mixing the premix with seaweed oligosaccharide and polyvinyl alcohol in a pulverizer, adding sodium humate to the pulverizer, and then stirring for 20-50 minutes; and 5) adding polyacrylamide, glycerol, and potassium citrate to the obtained mixture, and homogenizing in a homogenizer to obtain the composite fruit and vegetable preservation film.

COMPOSITION COMPRISING MODIFIED STARCH, A C13-C15 FATTY ACID, AND A POWDERED ORGANIC SALT. The present invention relates to a composition comprising (a) at least one modified starch; (b) at least one C13-C15 fatty acid; (c) at least one powdered organic salt; and (d) water. The composition according to the present invention can provide exceptional foaming ease and leads to an improved amount of foam. Figure for abstract: none

The application provides a grafted modified starch, a preparation method thereof and a low-temperature sizing application. The acid hydrolysis starch is used as a raw material, the acid hydrolysis starch has a lower molecular weight, a relatively less hydrogen bond structure in the molecule, a relatively increased porosity of the system, and small molecules are more easily entered into the interior of the starch; the acid hydrolysis starch is modified by using acrylic acid and vinyl acetate, so that the grafted starch has more carboxyl and hydroxyl groups on the molecular structure, the hydrophilicity of the modified starch can be further increased, the starch can be low-temperature gelatinized, the purpose of low-temperature sizing is achieved; then the carboxyl-hydroxyl starch is esterified, and ester groups are introduced, so as to adjust the hydrophilicity and hydrophobicity of the modified starch, the introduction of the hydrophobic groups can reduce the viscosity of the sizing material and improve the fluidity of the sizing material, meanwhile, the introduction of the specific ester groups can also increase the affinity of the gelatinized sizing material to fibers, improve the applicability to various textile fabrics, and solve the problems that the adhesion of the original starch sizing material to the yarn is not strong, and the sizing film is hard and brittle.

The utility model relates to the technical field of modified starch production and processing, in particular to modified starch filter pressing equipment which comprises a base, and a vertical plate is fixedly connected to the top of the base close to the edge of the base. During use, the motor II is started, the rotating shaft is driven to rotate, the cam is driven to rotate, the filter belt is driven to perform stepping transmission, raw materials fall to the filter belt from the material conveying strip, the motor I is started, the upper pressing plate is driven to move downwards, the lower pressing plate is arranged below the filter belt, the two pressing plates clamp the filter belt to be close to the raw materials, and moisture in the raw materials is extruded; the two scrapers are driven to get close to each other and rub powder cakes adhered to the bottom of the upper pressing plate, the scrapers move to drive the two push plates to get close to push raw materials just falling onto the filter belt, so that the raw materials are collected in the middle and wait for downward pressing of the lower pressing plate, the scrapers are arranged to guarantee that the bottom of the upper pressing plate is always flat, and sufficient filter pressing of the raw materials is facilitated. The push plate is arranged, so that the raw materials wait for filter pressing in a centralized state and are prevented from overflowing out of the action range of the upper pressing plate, and sufficient filter pressing is facilitated.

The application relates to the technical field of building material preparation, and particularly discloses a preparation process of a low-temperature flow-state curing agent and a cured soil building material, which comprises the following steps: (1) adding modified starch into water, stirring until uniform, and then removing oxygen; then adding maleic anhydride and persulfate for heating reaction; after the reaction is completed, adding ethanol, separating out precipitates, and drying to obtain CMSS-g-MA; (2) adding glycine betaine into water, stirring until uniform, then adding CMSS-g-MA for heating reaction; after the reaction is completed, performing spray drying on the obtained reaction liquid to obtain modified betaine powder; and (3) taking sulphoaluminate cement, ordinary Portland cement, polycarboxylate superplasticizer, silane coupling agent, the modified betaine powder and hydroxyethyl cellulose as raw materials, mixing the raw materials until uniform, and then obtaining a low-temperature flow-state curing agent. The application can better avoid the freezing of a cured soil slurry in a low-temperature environment, maintain the stability of the internal structure of the cured soil, and provide guarantee for low-temperature construction.

To obtain buckwheat plants with modified starch properties. [Solution] According to the present invention, a buckwheat plant is provided in which the activity of starch branching enzyme 1 (SBE1) is reduced or deficient.

The present invention relates to a composition, comprising (a) at least one modified starch; (b) at least one C13-C15 acid; (c) at least one clay; and (d) at least one amphoteric surfactant, wherein the weight ratio of the amount of the (d) amphoteric surfactant / the amount of the (b) C13-C15 fatty acid is 0.5 or more, preferably 0.6 or more, and more preferably 0.7 or more. The composition according to the present invention can be rinsed off from a keratin substance such as skin and can leave an enhanced deposition of clay on the keratin substance after rinsing off the composition from the skin.

The application belongs to the technical field of soft capsules, and discloses a starch-based soft capsule material and a preparation method thereof. The preparation method comprises the following steps: mixing wheat starch and deionized water, adding a sodium periodate solution to react, so as to obtain dialdehyde starch; reacting the dialdehyde starch with glycidyl methacrylate and triethylamine, so as to obtain grafted modified starch; mixing the grafted modified starch with modified nano-silicon dioxide, and reacting after ultrasonic oscillation, so as to obtain nano-silicon dioxide composite modified starch; mixing the composite modified starch with polyvinyl alcohol and polyvinylpyrrolidone, so as to obtain a film forming solution; and after the film forming solution is cast and dried, hot pressing is performed, so that the starch-based soft capsule material is finally obtained. The starch is subjected to multiple hydrophobic modifications, so that the hydrophilic performance is reduced, and the stability of the soft capsule is improved.

The invention belongs to the field of agricultural biology, and particularly discloses a fulvic acid extrusion granulation microbial agent and a production process thereof, and the fulvic acid extrusion granulation microbial agent comprises the following components in parts by weight: 76-107 parts of an inner core and 24-37 parts of a shell; the inner core comprises 30-45 parts of ultrasonic activated fulvic acid, 8-12 parts of heat-resistant composite microbial powder, 15-20 parts of light calcium carbonate, 3-5 parts of molasses and 20-25 parts of attapulgite; the shell comprises 5-8 parts of a heat-sensitive microbial agent, 4-6 parts of a composite protective agent, 3-5 parts of cold-soluble modified starch, 2-3 parts of sodium alginate and 10-15 parts of fulvic acid fine powder; the heat-sensitive bacteria are independently arranged on the shell layer, the normal-temperature centrifugal coating and powder lamination process is adopted, the cell protection effect of the composite protective agent is matched, the processing survival rate of the heat-sensitive bacteria is greatly improved, and meanwhile, the cold-soluble modified starch-sodium alginate barrier layer of the shell ensures the viable bacteria retention rate of the heat-sensitive bacteria during long-time storage and transportation.

This application relates to the field of materials, and provides a method for preparing all-starch foamed tableware. By weight, the all-starch foamed tableware comprises the following components: 85-92 parts of composite modified starch, 23-38 parts of plant cellulose, 1-2 parts of foaming agent, 3.5-7 parts of nucleating agent, 1-1.5 parts of plasticizer, and 3-6 parts of crosslinking agent; wherein the foaming agent includes at least one of sodium bicarbonate, ammonium bicarbonate, and ammonium carbonate; the nucleating agent includes at least one of talc, calcium carbonate, montmorillonite, diatomaceous earth, straw powder, chitosan, and cyclodextrin; the plasticizer includes at least one of glycerol, sorbitol, ethanol, and water; and the crosslinking agent includes at least one of citric acid, malic acid, tartaric acid, maleic acid, succinic acid, and adipic acid. This application not only comprehensively improves the water resistance, heat resistance, mechanical strength, and cell uniformity of the all-starch foamed tableware, but also ensures that the product meets usage requirements.

The invention provides a modified starch-based temporary plugging agent suitable for oil-based drilling fluid as well as a preparation method and application of the modified starch-based temporary plugging agent. The preparation method of the modified starch-based temporary plugging agent comprises the following steps: adding starch sodium octenylsuccinate into water, uniformly stirring, then adding acrylamide, butyl acrylate, 2-acrylamido-2-methylpropanesulfonic acid and N, N '-methylene bisacrylamide, uniformly stirring, and adjusting the pH value to 6-8 to obtain a water phase; adding the emulsifier into the white oil, and uniformly stirring to obtain an oil phase; adding the water phase into the oil phase, and emulsifying to obtain an emulsion; adding an initiator into the obtained emulsion, and reacting to obtain a reaction solution; and adding ethanol into the obtained reaction liquid for precipitation, centrifuging, washing, drying and grinding to obtain the product. The temporary plugging agent disclosed by the invention is stable in dispersion in an oil-based drilling fluid system, high in high-temperature plugging capacity, capable of efficiently plugging a high-permeability channel and automatically degrading, and capable of meeting the plugging and reservoir protection requirements of the deep well oil-based drilling fluid.