61 results about "Gum cellulose" patented technology

The invention discloses a water-soluble thick oil viscosity reducer belonging to the technical field of emulsified viscosity reducers of viscous crude oil. The water-soluble thick oil viscosity reducer is prepared from the following components in parts by weight: 0.01-1.0 part of surface active agent, 0.01-1.0 part of dispersant and 0.01-0.6 part of demulsifier, wherein the surface active agent is a nonionic surface active agent selected from OP-10, TX100, Span80 and Tween80, the dispersant is a water-soluble polymer material selected from polyacrylamide, polyvinyl alcohol, guar gum and cellulose, and the demulsifier is a polyoxyethylene-polyoxypropylene segmented copolymer. The invention has good emulsifying and viscosity-reducing effects, the emulsified crude oil can be automatically demulsified to reach a dehydration rate over 95 percent, and the viscosity reducer has little consumption and low cost by adopting low-price materials.

The present invention provides cellulose hydrogels having one or more of the following properties: high water content, high transparency, high permeability, high biocompatibility, high tensile strength and an optimal thickness. The present invention further provides a process for preparing a cellulose hydrogel comprising: (i) contacting cellulose with a solvent to activate the cellulose; (ii) optionally removing the solvent from the activated cellulose; (iii) substantially dissolving the activated cellulose to form a solution; (iv) allowing the solution to gel; and optionally (v) drying the gel and rehydrating the gel. The cellulose hydrogel can have many uses, including uses as contact lenses.

The present invention provides cellulose hydrogels having one or more of the following properties: high water content, high transparency, high permeability, high biocompatibility, high tensile strength and an optimal thickness. The present invention further provides a process for preparing a cellulose hydrogel comprising: (i) contacting cellulose with a solvent to activate the cellulose; (ii) optionally removing the solvent from the activated cellulose; (iii) substantially dissolving the activated cellulose to form a solution; (iv) allowing the solution to gel; and optionally (v) drying the gel and rehydrating the gel. The cellulose hydrogel can have many uses, including uses as contact lenses.

The invention relates to the field of chemical industry, in particular to utilization of tobacco. The method comprises the following steps of: crushing dried tobacco powder into powder with grain diameter of not less than 20 meshes; adding water medium in an amount which is equivalently 10-30 times the volume of the tobacco powder to fully soak; performing steam explosion pretreatment to obtain steam explosion pretreatment solution, wherein pressure of the steam explosion pretreatment is not less than 0.04MPa, and the pretreatment time is not less than 60 seconds; and extracting hemicellulose, pectin, cellulose and lignin sequentially and respectively. By using the method, the yield of the hemicellulose reaches up to 90.7 percent, the yield of the pectin reaches up to 12.3 percent, the yield of the cellulose reaches up to 93.6 percent, and the yield of the lignin reaches up to 90.9 percent; and the substances can be continuously extracted.

The invention discloses a soybean protein and edible glutinous rice starch floor glue and a preparation method thereof. The floor glue comprises deionized water, soybean proteins, sweet rice flour, corn starch, rice flour, coix seed powder, cassava starch, wheat starch, potato starch, fish gelatin, cellulosic ethanol, sodium lignosulfonate, xanthan gum, acetyl tributyl citrate, ethyl acetate, sodium benzoate and ethylene glycol. A result of -30 ~ -50 DEG C refrigeration cycle 3-time freeze thaw test shows that the preserving rate of the adhesiveness and the peeling strength is 85-95%, the formaldehyde content is 0.01-0.2g / kg, and the adhesion stress is 60-70kPa.

A glass etching composition comprises: a basic etchant for etching glass; and a syrup obtained by hydrolyzing starch, wherein the syrup can comprise at least one of glucose, maltose and dextrin, and the basic etchant can comprise hydrofluoric acid, ammonium fluoride and water. The glass etching composition can further comprise at least one of starch powder, Fibersol, pectin, locust bean gum, gelatin, guar gum, xanthan gum, gum arabic, cellulose, PEO and PVA. A method for manufacturing anti-glare glass comprises a first etching step of screen printing a first glass etchant on glass, wherein thefirst glass etchant comprises: a basic etchant for etching glass; and a syrup obtained by hydrolyzing starch, wherein the glass can have greater chemical durability than soda-lime glass. The method additionally comprises a second etching step of etching the glass with a second glass etchant after the first etching step.

The invention belongs to the technical field of composite materials and provides a preparation method of a gel cellulose compound film. The preparation method comprises the following steps: dissolving cellulose in an alkaline solution to obtain a cellulose solution, performing defoaming treatment, substrate film forming, solidification in a solidification bath and freezing and drying to obtain a solid cellulose film; and loading PHBH on the obtained solid cellulose film in a PHBH solution to obtain a PHBH-cellulose compound film, and performing hot pressing to obtain the gel cellulose compound film. According to the preparation method provided by the invention, the production cost of the compound film can be reduced, the prepared gel cellulose compound film is compact in structure and has a good mechanical property, the air permeability is reduced effectively, and the gel cellulose compound film can be fully degraded in a natural condition and is environmentally friendly.

The invention discloses a white fungus polysaccharide and its preparation method and application. The preparation method comprises: (1) extracting white fungus powder with a neutral buffer solution to obtain an extraction material liquid; (2) adding the extraction material liquid to Add pectin cellulose compound enzyme to the compound enzyme for enzymolysis, the mass ratio of pectinase and cellulase in the pectin cellulose compound enzyme is (1.5~2):1; (3) filter after enzymolysis, take The filtrate is centrifuged, and the supernatant is taken after standing still; (4) the supernatant is subjected to alcohol precipitation and centrifuged, and the obtained precipitate is tremella polysaccharide. The preparation method of the present invention has low cost and high efficiency, and the yield of tremella polysaccharide is higher than 40%, which is suitable for large-scale commercial production. The tremella polysaccharide prepared by the method has polysaccharides with a molecular weight below 10000Da accounting for more than 95% of the total polysaccharides , the total sugar content is greater than 92%, and has broad application prospects in the fields of food, medicine, health care products and cosmetics preparation.

A seed or seedling is coated with underivatized guar, cationic hydroxypropyl guar, polyacrylamide, poly(methacrylic acid), poly(acrylic acid), polyacrylate, polyethylene glycol), polyethyleneoxide, poly(vinyl alcohol), polyglycerol, polytetrahydrofuran, polyamide, hydroxypropyl guar, carboxymethyl guar, carboxymethylhydroxypropyl guar, underivatized starch, cationic starch, corn starch, wheat starch, rice starch, potato starch, tapioca, waxy maize, sorghum, waxy sorghum, sago, dextrin, chitin, chitosan, xanthan gum, carageenan gum, gum karaya, gum arabic, pectin, cellulose, hydroxycellulose, hydroxyalkyl cellulose, hydroxyethyl cellulose, carboxymethylhydroxyethyl cellulose, or hydroxypropyl cellulose, the coated seed or seedling having a shelf-life at room temperature in ambient conditions in an unsealed container to at least two months.

The invention relates to the technical field of packaging paper, and particularly relates to a method for preparing waterproof cellophane. Emulsified paraffin and an acrylic acid monomer are subjectedto an emulsification reaction initiated by potassium thiosulfate to obtain modified emulsified liquid paraffin; bagasse is subjected to alkalization and yellowing to obtain cellulose viscose; after the cellulose viscose and the modified emulsified liquid paraffin are mixed and subjected to film drawing, a product is put into a coagulating bath and then taken out; and the product is subjected to water washing, alcohol washing and drying to obtain the waterproof cellophane. An esterification reaction allows distances among wood fibers to be reduced, thus improving waterproofness of the cellophane. The modified emulsified liquid paraffin has large bond energy and is a hydrophobic group, thus facilitating waterproofness improvement. Crosslinking occurs during film drawing because of the existence of acrylic acid so that compactness of the liquid paraffin that is a surface protective film of the viscose is improved and cellulose in the cellophane hardly absorbs water through the compact protective film, and therefore waterproofness of cellulose is improved and the cellophane has a wide application prospect.

The invention provides a preparation method of a plant-source long-acting mosquito-repelling composite functional filament. The preparation method comprises the steps of preparation of plant-source mosquito-repelling components, preparation of cellulose nano-porous aerogel, modification, preparation of plant-source mosquito-repelling functional master batches and spinning. SiO2 is embedded into the cellulose nano-porous aerogel, the porous structure of the cellulose nano-porous aerogel is supported, the cellulose nano-porous aerogel is not prone to collapse, the cellulose nano-porous aerogel can be soaked in a plant source mosquito repelling component solution again to be recycled after being washed for multiple times, long-acting mosquito repelling is achieved, and compared with a traditional mosquito repelling mode, the method is more environmentally friendly. After being woven into a fabric, the plant-source long-acting mosquito-repelling composite-function filament can be washed for more than 50 times and can be continuously recycled by soaking and adsorbing mosquito-repelling essential oil, odor emitted by the fabric can purify air and drive mosquitoes, a human body is effectively prevented from being bitten by the mosquitoes, and the fabric has a long-acting mosquito-repelling function. Meanwhile, the human body does not have any uncomfortable phenomena such as allergy.

A tablet for oral administration comprises a matrix of progressive and continuous released magnesium. For the administration of 90 to 110 parts by weight of magnesium, the matrix comprises 180 to 190 parts by weight of hydroxypropylmethylcellulose, 19.8 to 22.2 parts by weight of glyceryl behenate, 10 to 12 parts by weight of lactose and 10 to 12 parts by weight of colloidal silica. A non-enteric protective coating that slows down the gastric dissolution of the magnesium may comprise 15 to 75 parts by weight of shellac, cellulose ether or a mixture thereof. The tablet may be administered to patients in need thereof.