18 results about "Gum cellulose" patented technology

The invention belongs to the technical field of termite prevention and control, and discloses a termite trapping and killing agent and a preparation method thereof.The termite trapping and killing agent is prepared from, by weight, 25-30 parts of pine sawdust powder, 10-20 parts of dustpan, 8-12 parts of sugarcane powder, 4-6 parts of pine pollen, 6-10 parts of compound insecticide, 1-3 parts of pheromone sustained-release microcapsules, 15-25 parts of hydrogel cellulose composite carrier and 1-3 parts of hydrocarbon mixing agent; according to the termite trapping and killing agent, fipronil and hexaflumuron are compounded, the termite killing effect is improved by compounding two agents with completely different action mechanisms, and the discovery rate, the feeding rate and the agent transmission efficiency of termites can be remarkably improved by adding the pheromone sustained-release microcapsules, the hydrogel cellulose composite carrier and the hydrocarbon mixing agent; and finally, eradication prevention and control on the ant nests are achieved, the environmental adaptability is high, and the lasting period is longer.

The application provides a sodium silicate silica gel cellulose membrane and a preparation method and application thereof, and belongs to the technical field of silica gel membranes. In the application, a sodium silicate solution with viscosity is immersed between plant fibers, part of the sodium silicate on the cellulose membrane reacts with carbon dioxide in the air to produce amorphous silicic acid gel, and the silicic acid gel is converted into silicon dioxide through natural dehydration and drying, so that the silica gel powder and the cellulose film are tightly connected together. The preparation method provided by the application is simple in operation and low in cost, can be used for production and application in ordinary laboratories with insufficient funds, the sodium silicate silica gel cellulose membrane prepared by the method has the characteristics of adsorbing nucleic acids, can replace silica gel membranes on the market to prepare relatively pure nucleic acid samples, and has a shorter operation time and a higher extraction efficiency than that of using only silicon dioxide particles, silica gel particles and calcium carbonate powder to adsorb nucleic acids in a nucleic acid extraction solution.

The invention relates to the technical field of performance optimization of regenerated cellulose carbamate materials, in particular to an alkali treatment performance optimization method of a regenerated cellulose carbamate material. The method for optimizing the alkali treatment performance of the regenerated cellulose carbamate material comprises the following steps: washing the regenerated gel cellulose carbamate material with water until the pH value is neutral, then soaking the regenerated gel cellulose carbamate material in an alkali solution, washing the regenerated gel cellulose carbamate material with water until the pH value is neutral, and drying the washed regenerated gel cellulose carbamate material to obtain the regenerated cellulose carbamate material, the concentration of the aqueous alkali is 1-50 g / L, the soaking temperature is 25-65 DEG C, and the soaking time is 1-20 min. According to the method disclosed by the invention, carbamate can be hydrolyzed, so that a regenerated gel cellulose carbamate material is converted into a regenerated cellulose material which hardly contains carbamate groups, and the mechanical property of the material is remarkably improved. The method is simple in process, environmentally friendly, safe, controllable and convenient for industrial application.

The invention belongs to the technical field of wearing armours, particularly relates to a composite material 3D (three-dimensional) wearing armour, and aims to solve the problems that the existing wearing armour is relatively high in hardness and poor in fitting property in the use process, part of materials can release harmful substances, or pollution is caused to the environment in the production, use and discarding processes, and the wearing armour cannot be used for a long time. In order to solve the problems in the prior art that certain environmental protection and health risks exist in the prior art, the invention provides the following scheme that the material comprises the following raw materials in parts by weight: 40-60 parts of thermoplastic polyurethane; the thermochromic coating is prepared from thermoplastic polyurethane, polyvinyl butyral, polymethyl methacrylate, a polyolefin elastomer, diisononyl cyclohexanedicarboxylate, acetyl tributyl citrate, nano silicon dioxide aerogel, cellulose nanocrystal, organic montmorillonite, thermochromic microcapsules, rare earth aluminate fluorescent powder, polyethylene wax and fumed silica, and the thermochromic coating is prepared from the following components: thermoplastic polyurethane, polyvinyl butyral, polymethyl methacrylate, polyolefin elastomer, diisononyl cyclohexanedicarboxylate, acetyl tributyl citrate, nano silicon dioxide aerogel, cellulose nanocrystal, organic montmorillonite, thermochromic microcapsules, rare earth aluminate fluorescent powder, polyethylene wax and fumed silica. By using polyethylene glycol, the hardness and flexibility of the product are effectively improved, and the product is environment-friendly, non-toxic and harmless.

The invention provides a mousse product and a preparation method thereof.The mousse product is prepared from, by mass, 6%-93% of dairy products, 5%-20% of edible sugar, 0.2%-0.5% of emulsifying agents, 1.5%-2.5% of compound thickening stabilizers, 0.3%-1% of essence and water, and the mousse product has the smooth and dense taste; gelatin in a traditional mousse product is replaced with a compound thickening stabilizer, the compound thickening stabilizer comprises modified starch and colloid, and the colloid adopts at least one of accessory vegetable gum, seaweed gel, cellulose gum and microbial fermentation gel and can serve as a supporting body of the mousse product. The mousse product can be shaped at normal temperature and stored for a long time, does not need refrigeration equipment in industrial production and transportation processes, and is convenient to transport and sell.

The application discloses a super-strong bonding water-based adhesive and a preparation method thereof, and relates to the technical field of adhesives. In a dispersion system of aluminum gel, cellulose nanocrystals and surface-carboxylated amorphous calcium carbonate, chemical bonding and uniform dispersion of nano-filler and a polymer matrix are realized through in-situ polymerization of polyurethane monomers, so that excellent bonding strength and water resistance are realized. Aluminum ions and carboxymethyl cellulose sodium form an ionic gel structure, the mechanical embedding of the adhesive and the base material is enhanced, amorphous calcium carbonate is wrapped with acrylic acid polymerization, so that the nanoparticles are stabilized, calcium carbonate is diffused into the polyurethane matrix to realize the organic-inorganic hybrid reinforcing structure of the adhesive, and the polyurethane monomers are in-situ polymerized in the presence of nano-filler, so that the crystal form of calcium carbonate and the mechanical properties of the adhesive are stabilized, and the overall structural integrity of the matrix is enhanced.

The invention relates to the technical field of packaging materials, in particular to a composite membrane based on esterified pectin, a hydrophobic composite membrane and application of the composite membrane. A cellulose-based nanofiber; a plant polyphenol cross-linking agent; a divalent or trivalent metal cation; wherein the composite membrane is prepared by carrying out a cross-linking reaction on the raw materials. According to the composite membrane disclosed by the invention, a plant polyphenol cross-linking agent and metal cations are utilized to form a multi-element coordination network, the network is utilized as a rigid trunk skeleton for supporting the whole membrane body, and meanwhile, esterified pectin and cellulose-based nanofibers are synergistically combined with the skeleton through hydrogen bonds, so that a stable three-dimensional cross-linked structure is successfully constructed and obtained; the core problem of insufficient mechanical properties of a natural pectin film is fundamentally solved, so that the composite film shows the structural characteristics of high tensile strength and high modulus; furthermore, wax is introduced and can be uniformly and stably dispersed in the three-dimensional cross-linked network by utilizing the interface anchoring effect of hydrophobic alkenyl in the esterified pectin molecular chain, so that the hydrophobic composite membrane with excellent mechanical properties is obtained, and the application prospect is wide.

A preparation method of hydrophobic cellulose aerogel comprises the following steps: (1) putting agricultural and forestry waste powder into a NaClO2 solution for reaction, performing solid-liquid separation after the reaction is ended, and performing water washing and alkali washing on the obtained solid-phase powder to obtain cellulose; (2) putting the obtained cellulose into a low-temperature mixed solution of NaOH and urea, and rapidly stirring until the cellulose is completely dissolved to obtain a cellulose solution; (3) adding epichlorohydrin into the cellulose solution for crosslinking, fully and uniformly stirring, and standing to obtain cellulose hydrogel; (4) washing the cellulose hydrogel to be neutral, freezing and forming, and freeze-drying in a freeze dryer to obtain cellulose aerogel; and (5) carrying out hydrophobic modification on the cellulose aerogel by using organic silicon and water to obtain the hydrophobic cellulose aerogel. The aerogel has the characteristics of low density, high porosity, superhydrophobicity, large adsorption capacity and recyclability, and has very high application value in the field of petroleum adsorption.

The present invention discloses a method for packaging cut meat for freshness preservation. The packaging method for cut meat for freshness preservation according to the present invention is a packaging method for cut meat for freshness preservation, comprising: (a) cold A step of forming a coating film having a thickness of 0.01 to 0.2 mm by applying a natural polymer compound, composed of one or more of agar, gelatin, cellulose, starch, and protein, to the surface of the cut meat; (b) the above It consists of a packaging step for packaging cut meat with a coating film formed thereon. The packaging method for cutting meat for freshness preservation according to the present invention, configured as described above, applies agar to the surface of the cut meat, Form a coating film by applying natural polymer compounds such as gelatin, alginic acid, starch, other polysaccharides, starch, and cellulose. It lowers the production of basic nitrogen by blocking the cell membranes on the surface of the meat from the outside through simple process improvements, and at the same time, microorganisms It has the advantage of being able to suppress spoilage caused by water proliferation. In addition, natural polymer compounds can maintain freshness and suppress browning by blocking the cell membranes on the surface of the meat. Since this can guarantee excellent appearance and taste for meat products that prioritize sensory elements, it enhances marketability. Useful effects are expected. In addition, since it can be distributed and displayed in a state highly preferred by consumers, consumer satisfaction with the product can be further enhanced. It has an effect.

This invention discloses a recyclable, environmentally dry gelatin / cellulose-based thermal insulation cooler, its green preparation method, and its application. The green preparation method of the recyclable, environmentally dry gelatin / cellulose-based thermal insulation cooler is as follows: dissolving gelatin in water to obtain a gelatin solution; mixing the gelatin solution with a cellulose dispersion to obtain a gelatin / cellulose mixture; adding functional fillers to the gelatin / cellulose mixture and dispersing them evenly to obtain a foam precursor solution; adding sodium dodecyl sulfate to the foam precursor solution and then stirring it at high speed to obtain wet foam; gelling the wet foam to obtain a wet foam gel; and naturally drying the wet foam gel to obtain the gelatin / cellulose-based thermal insulation cooler. The thermal insulation cooler prepared by this invention has advantages such as low density, high porosity, uniformly distributed small pore size, high solar reflectivity and infrared emissivity, and low thermal conductivity. Furthermore, it can be recycled and reused, and the entire process is environmentally friendly, non-toxic, and does not require drying equipment.

The application discloses an assembled light thermal insulation wallboard and a preparation process thereof, relates to the technical field of light thermal insulation wallboards, and discloses the preparation process, which comprises the following steps: uniformly stirring water reducing agent into deionized water, uniformly stirring cellulose ether into the deionized water, and obtaining a cellulose ether solution; uniformly stirring polyimide hybrid aerogel and a surfactant into the cellulose ether solution, and obtaining an aerogel cellulose ether solution; uniformly stirring cement, silica fume, fly ash and hollow glass microbeads, uniformly stirring the aerogel cellulose ether solution into the mixture, uniformly stirring expanded polystyrene particles into the mixture, uniformly stirring the mixture, pouring the mixture into a mold, vibrating, demolding, curing, and obtaining the light thermal insulation wallboard.

An oil-in-water emulsion composition comprising: (A) alkoxysalicylic acid or a salt thereof represented by general formula (1); (B) at least one selected from the group consisting of polyoxyethylene dialkyl esters and polyoxyethylene dialkyl ethers represented by general formula (2); (C) at least one selected from the group consisting of polyoxyethylene alkyl esters and polyoxyethylene alkyl ethers represented by general formula (3); (D) agar; and (E) (i) carbomer and an alkali agent; (ii) sodium carbomer; or (iii) at least one selected from the group consisting of succinosaccharide, xanthan gum, cellulose gum, (acrylate / 2-(perfluorohexyl)ethyl acrylate) crosspolymer, and (acrylate / laurate methacrylate / isodecyl methacrylate) crosspolymer, and carbomer, wherein the content of (A) alkoxysalicylic acid or a salt thereof represented by general formula (1) is more than 1% by mass.

The invention relates to the technical field of polymer composite materials, and particularly discloses a thermoplastic elastomer material and a preparation method thereof. The thermoplastic elastomer material comprises polypropylene, a styrene-ethylene-butylene-styrene block copolymer, biodegradable polyester, an antibacterial component, poly (N-isopropylacrylamide) microgel, cellulose nanocrystals, fluorosilicone modified acrylate, maleic anhydride grafted polypropylene, white oil and a natural antioxidant. The thermoplastic elastomer has temperature-sensitive self-adaptive sealing and long-acting antibacterial functions, solves the technical problems of poor antibacterial property, short antibacterial time, high-temperature sealing failure and non-degradability of the traditional thermoplastic elastomer, and is suitable for the field of biological medicine packaging requiring high-temperature sterilization, such as rubber plugs for injection and infusion bags.

Provided arc gummy-like products formed by hydrating dry tableting compositions, the dry tablets formed using tableting compression methods on the dry tableting compositions. The tablets may be hydrated using a salt water bath or a coating pan technique, for example. The dry tableting compositions and the hydrated tablets may comprise one or more active pharmaceutical ingredients, therapeutic agents, or supplements; one or more sweeteners; gelatin; cellulose; one or one or more acids; and one or more flavors.

The present application belongs to the technical field of vegetable storage and preservation, and particularly relates to a fresh vegetable storage and preservation method. The fresh vegetable is coated with pepper leaf essential oil and then packaged; the packaged vegetable is stored in a low-pressure electrostatic field and a low-temperature environment. The present application uses the pepper leaf essential oil coating, combined with the low-temperature and low-pressure electrostatic field preservation technologies, which have a synergistic effect, can obviously inhibit the pectin and cellulose degradation enzyme activity, reduce the metabolic decomposition of the cell wall structure components such as pectin and cellulose, reduce the loss of the nutritional components and water of the vegetable, maintain the texture characteristics of the vegetable, delay the oxidative decomposition of the chlorophyll components, thereby maintaining the original color quality of the vegetable, delaying the yellowing of the vegetable, inhibiting the postharvest physiological metabolism of the vegetable, delaying the consumption of the soluble solids of the vegetable, inhibiting the membrane lipid peroxidation, reducing the accumulation of malondialdehyde, and prolonging the shelf life of the fresh vegetable.

This invention provides a double-crosslinked cellulose gel electrolyte, its preparation method, and its application. The preparation method includes the following steps: preparing a Tempo-oxidized cellulose nanoparticle dispersion and a cellulose solution separately; then mixing the two, stirring evenly, and adding a chemical crosslinking agent to carry out a crosslinking reaction to obtain a cellulose gel; soaking the cellulose gel in water to obtain the double-crosslinked cellulose gel electrolyte. This invention uses cellulose as a backbone and Tempo-oxidized cellulose nanoparticles as fillers and reinforcing agents to carry out a crosslinking reaction to obtain a cellulose gel electrolyte. It contains abundant hydroxyl and carboxyl functional groups, forming a three-dimensional network structure with good mechanical strength and a dynamic hydrogen-bonded crosslinking network, thereby effectively inhibiting zinc dendrite growth and side reactions.

The invention provides a biological foam oil displacement system for medium and low permeability oil reservoirs and a screening method and application, and relates to the technical field of microbial oil recovery, the method comprises the following steps: oil reservoir screening, biological foam oil displacement system construction, and injection mode selection; a foaming agent of the biological foam oil displacement system comprises one or more of fermentation broth such as double rhamnose monolipid, double rhamnose dilipid, single rhamnose monolipid, single rhamnose dilipid, surfactin, scabamarin, iturin, deysin, serratia marcescens, mucilatin, trehalose lipid, lactone type sophorolipid, acid type sophorolipid and the like, and a bio-based oil displacement agent, and the foaming agent is prepared from one or more of fermentation broth such as double rhamnose monolipid, double rhamnose dilipid, single rhamnose monolipid, single rhamnose dilipid, surfactin, scabamarin, iturin, deysin, serratia marcescens, mucilatin, trehalose lipid, lactone type sophorolipid and acid type sophorolipid. The foam stabilizer comprises one or more of xanthan gum, welan gum, Wollan gum, Dide gum, gellan gum, rhamnose gum, diidine gum, cellulose, biosynthetic nanoparticles and fly ash. The method has the beneficial effects that aiming at the problems of high heterogeneity and the like of medium and low permeability reservoirs, the characteristics of the biological surfactant are utilized, and a pure biological foam combination flooding system is constructed.

The present invention provides a pre-frozen food slurry, which comprises, by mass, 10-50% of a fruit product, 15-30% of edible sugar, 0.4-1.5% of a compound stabilizer, 0.5-2% of an auxiliary food additive, and water, the compound stabilizer comprises at least one of modified starch and a colloid, and the auxiliary food additive comprises at least one of modified starch and a colloid. The colloid comprises at least one of auxiliary vegetable gum, seaweed gum, cellulose gum and microbial fermentation gum. The compound stabilizer provided by the invention can maintain the stability of bubbles in the pre-frozen food slurry, avoids the appearance of large ice crystals after freezing, and is beneficial to formation of fine and smooth texture; the pre-frozen food pulp can keep a stable structure at normal temperature, so that long-time storage at normal temperature is realized, and quality degradation of the pre-frozen food pulp in the transportation and storage process is prevented; the pre-frozen food pulp can maintain light and smooth taste after being frozen, refrigeration equipment is not needed in the industrial production and transportation process, transportation and selling are convenient, and production and transportation cost can be reduced.