179 results about "Cellulose compounds" patented technology

The invention belongs to the field of material science and particularly relates to a graphene oxide/cellulose compound material as well as a preparation method and application of the material. The compound material is prepared by mixing graphene oxide suspension and alkaline solution of cellulose, and forming a compound structure of the graphene oxide and the cellulose under the action of mechanical stirring, shearing, ultrasonic or the like. In the preparation method, raw materials are cheap and easy to obtain, a water system is simple and free of pollution, equipment is simple and low in cost, and the industrial preparation is easy to realize; and the prepared compound material has the properties of fiber and the graphene oxide and is widely applied.

A photocurable pressure-sensitive adhesive composition includes an acrylic binder resin including a cellulose compound and an acrylic monomer, an acrylate oligomer compound, a curing agent, and a photoinitiator.

A food product that includes a casing of a gelatin-free, water-based, set hydrocolloid gel that forms an enclosure, and at least one solid, liquid, soft or particulate center enclosed by the casing. The casing is made of a carageenan, alginate, agarose, gellan gum, pectin or cellulose compound, and the food product can withstand changes in temperature. Also, a process for the production of such a food product, wherein a liquid hydrocolloid mass is partially set and a hard, liquid, soft or particulate center is injected therein with the final completing or the setting of the hydrocolloid mass providing the encapsulation of the center.

The invention discloses a preparation method for a bacterial cellulose composite membrane and application of the bacterial cellulose composite membrane as a facial mask material. The preparation method comprises the following steps: (1) selecting a strain; (2) preparing a seed containing a polyglutamic acid (PGA) and a liquid culture medium; (3) culturing seed cells; (4) producing bacterial cellulose by static liquid fermentation; and (5) purifying a bacterial cellulose membrane. The bacterial cellulose composite membrane can be used as a facial mask carrier or is directly used as a wet facial mask. The preparation method improves the yield of the bacterial cellulose by adding the polyglutamic acid (PGA) into the culture medium, improves the water content and the mechanical strength of a wet membrane, and has simple process and low cost; and the experiments prove that the method can ensure that the dry weight of the bacterial cellulose is improved to between 14 and 16g/L from the prior dry weight of between 8 and 10g/L, and the water content is increased to 99 percent from 98 percent.

A cellulose film, containing a cellulose compound of formula (I),

• • wherein, R¹⁶, R¹³, and R¹² represent a hydrogen atom, or a group containing an aliphatic or aromatic group; —X¹⁶—, —X¹³—, and —X¹²— represent *¹—O—, *¹—OOC—, or *¹—OOCNH—; n¹ represents an average polymerization degree of 10 to 1,500, and the following relationships are satisfied;

DS¹⁶_long<(DS¹³_long+DS¹²_long)  Expression (I)

2.5≧(DS¹³_long+DS¹²_long+DS¹⁶_long)>0.01  Expression (II)

wherein DS¹⁶_long, DS¹³_long, and DS¹²_long represent a substitution degree at the 6-, 3- or 2-position of the substituent having absorption at the longest wavelength, among the 3n¹ substituents on the 6-, 3- or 2-position; and said substituent has an absorption maximum wavelength at the longest wavelength in the range of 270 to 450 nm and a molar extinction coefficient of 2,000 to 1,000,000 for a solution of CH₃—X¹⁶—R¹⁶, CH₃—X¹³—R¹³ or CH₃—X¹²—R¹² corresponding to —X¹⁶—R¹⁶, —X¹³—R¹³ or —X¹²—R¹², respectively.

The invention relates to a controlled release pharmaceutical composition, comprising a core, comprising a pharmaceutical active ingredient, whereby the core is coated by an ethanol resistance conferring coating layer which has the effect of conferring the release profile of the pharmaceutical active ingredient to be resistant against the influence of ethanol, whereby the ethanol resistance conferring coating layer comprises at least 70% by weight of a mixture of a polymeric portion a) and an excipients portion b), with the polymeric portion a) is consisting of a water insoluble essentially neutral vinyl polymer or vinyl copolymer and the excipients portion b) is consisting of the excipients b1) 100 to 250% by weight of a non-porous inert lubricant, b2) 1 to 35% by weight of a cellulosic compound, b3) 0.1 to 25% by weight of an emulsifier and additionally or alternatively to b3), b4) 0.1 to 30% by weight of a plasticizer whereby the excipients of the excipients portion b) are each calculated on the dry weight of the polymer portion a).

A rechargeable lithium storage cell includes a positive electrode, whose electrochemically active material includes one or more oxides of a transition metal, and a negative electrode, consisting of a conductive support and an active layer containing a binder and an electrochemically active material. The binder is a polymer containing no fluorine. The electrochemically active material is a mixed oxide of lithium and titanium with the general formula Li.sub.xTi.sub.yO.sub.4 in which 0.8.ltoreq.x.ltoreq.1.4 and 1.6.ltoreq.y.ltoreq.2.2. The non-fluorinated polymer is preferably soluble in water or capable of forming a stable emulsion in suspension in water. The binder preferably contains an elastomer, especially an acrylonitrile/butadiene copolymer and/or a cellulose compound such as carboxymethylcellulose.

The invention relates to a bacterial cellulose composite membrane, a preparation method and application thereof; the preparation steps include the selection of a strain, the preparation of a seed and liquid medium, the culture of a seed cell, the production of a bacterial cellulose composite membrane by liquid fermentation and separation as well as purification and the like, finally the bacterial cellulose composite membrane is prepared. The bacterial cellulose composite membrane which is obtained by the invention has simple preparation process and low cost, significantly increases the conversion rate of raw materials and the output and water content of bacterial cellulose, can cause the dry weight of bacterial cellulose to be improved from the traditional 8-10g/L to 14-16g/L, and leads the water content to be raised from 98 to 99%. The bacterial cellulose composite membrane which is obtained by the invention can be used as a wound dressing.

A cellulose compound film containing a cellulose compound having two or more substituents whose polarizability anisotropies Δα calculated by mathematical formula (1) are different from each other, wherein substitution degrees of the following substituents A and B in the cellulose compound satisfy relationship as defined by mathematical formula (A1), in which the substituent A has the lowest Δα and the substituent B has the highest Δα: $\begin{array}{cc}\Delta \alpha =\alpha x-\frac{\alpha y+\alpha z}{2}& \mathrm{Mathematical}\mathrm{formula}\left(1\right)\end{array}$

wherein, in characteristic values obtained after diagonalization of polarizability tensor, αx is the largest component, αy is the second largest component, and αz is the smallest component;

DS_B2+DS_B3−DS_B6≧−0.1   Mathematical formula (A1)

wherein DS_B2, DS_B3, and DS_B6 represent a substitution degree of the substituent B at the 2-, 3-, or 6-position of a β-glucose ring constituting unit of cellulose, respectively; and

an optical compensation film, a polarizing plate, and a liquid crystal display device, using the cellulose compound film.

The invention belongs to the technical field of nanometer materials, and discloses a preparation method of the nanometer silver-nanocrystalline cellulose compound. The preparation method includes the following steps of adding a nanometer silver-nanocrystalline cellulose aqueous solution to a silver salt aqueous solution under the stirring condition, conducting stirring to obtain mixed liquor, stirring the mixed liquor in an ultrasonic container, conducting an ultrasonic reaction, conducting centrifugal separation on the reaction liquor after the reaction is completed, and taking and washing sediments to obtain the nanometer silver-nanocrystalline cellulose compound. The nanometer silver-nanocrystalline cellulose compound obtained through the method can serve as an antibacterial material to be applied to the field of articles of daily use, the medical treatment and public health field, the building material coating field and the electronic product field. The sizes of nanometer silver particles in the nanometer silver-nanocrystalline cellulose compound are the same. Dispersity of the nanometer silver particles in the nanometer silver-nanocrystalline cellulose compound is good. Nanometer silver is evenly loaded on the nanometer silver-nanocrystalline cellulose and not prone to agglomeration. The nanometer silver-nanocrystalline cellulose compound has good solubility in water.

The present invention relates to a coated granular slowly-releasing fertilizer and its preparation method. It is characterized by that the surface of the nitrogen granular fertilizer is covered witha layer of coated film, and said coated film is formed from nitro-cotton and tung oil as dry oil additive, and the coated film is 5%-30% of total weight and added quantity of tung oil is 0-20% of coated film weight. Its preparation method includes the following steps: dissolving the cellulose compound and its derivative for example nitro-cotton in solvent to obtain covering solution, said solventis ethyl alcohol and ethyl ether mixed solution, then coating surface of granular fertilizer with said covering solution, finally recovering solvent so as to obtain the invented coated granjlar slowly-releasing fertilizer.

This invention provides a method for highly efficient catalytic conversion of cellulosic raw materials to glycols. In the process, cellulosic compounds such as crop stalk, wood powder and etc., as feedstock are subjected to one-step catalytic conversion with a ternary composite catalyst composed of organic acid or inorganic acid which does not contain tungsten, a transition metal from Groups 8, 9 or 10 such as iron, cobalt, nickel, ruthenium, rhodium, palladium, iridium, and platinum, or a mixture thereof, and a tungsten oxide, a tungsten sulfide, a tungsten chloride, a tungsten hydroxide, tungsten bronze, tungstic acid, a tungstate, a metatungstate acid, a metatungstate, a paratungstate acid, a paratungstate, a peroxotungstic acid, pertungstate and heteropoly tungstate, or a mixture thereof. The reaction is carried out under hydrothermal conditions at a temperature between 120-300° C. with hydrogen pressure between 1-13 MPa.

This invention relates to a polysubstituent group cellulose compound aether and preparation method. According to weight, he substituent group include methoxyl group 12 to 28%, hydroxyl propoxy 0.5 to 15% and hydroxyethyl 0.2 to 15%. This invention uses three kinds chemical substituent group to substitute cellulose molecule hydroxyl,by controlling the content of three group, make the ethylol hydroxypropyl methylcellulose cost low, gel temperature high, water retention good and property stable. It can completely substitute currently applied cellulose compound aether. The invention also discloses the preparation method of above polysubstitutent group cellulose compound ester.

The invention relates to a method for preparing bio-ethanol by taking seaweed processing waste as raw material, which is characterized by comprising the steps: selecting the seaweed processing waste, and pretreating the raw material by sulfuric acid or hydrogen peroxide; then, adding cellulase or cellobiase for cellulose compound enzymolysis, and filtering enzymolysis liquid to remove insoluble components; and finally, supplementing inorganic salt, inoculating saccharomyces cerevisiae strain, and carrying out alcoholic fermentation under the anaerobic condition. The original structure of algae cellulose is changed by the pretreatment process, and the action probability between the cellulose and degrading enzyme can be promoted, so that the enzymolysis efficiency of the cellulose is improved; furthermore, after the cellulose is treated by the compound enzymolysis of the cellulase and the cellobiase, the feedback inhibition of the cellobiose for the cellulose can be effectively eliminated, the content of glycolysis sugar of yeast can be improved, and the yield of alcoholic fermentation is further improved.

The invention discloses a multilayered photosensitive material for processing into a flexographic printing plate by direct patterning with an infrared laser beam. The multilayered material comprises: (A) a substrate; (B) a photosensitive resinous layer having sensitivity to light excepting infrared light and comprising (b1) an elastomeric binder resin, (b2) a polymerizable monomeric compound and (b3) a polymerization initiator formed on the substrate (A); (C) a barrier layer of a composition comprising a resin such as a polyvinyl pyrrolidone and alkali-soluble cellulose compounds, which transmits light other than infrared light and is removable in the development treatment, formed on the photosensitive resinous layer (B); and (D) a masking layer of a composition comprising (d1) a film-forming binder resin, (d2) an infrared absorbing compound and (d3) a compound having no transmissivity to lights other than infrared light and removable by irradiation with an infrared laser beam, formed on the barrier layer (C).

An intravaginal bio-erodible microbicidal barrier device. The device comprises (a) at least one micronized compound selected from the group consisting of cellulose acetate phthalate and hydroxypropylmethylcellulos- e phthalate, and (b) at least one water soluble or water dispersible cellulose compound selected from the group consisting of hydroxypropylmethylcellulose, methylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxyethylmethylcellulose, hydroxyethylethylcellulose and hydroxypropylethylcellulose; or a pectin, such as an apple pectin. The device is prepared by a combination of foaming, freezing and freeze-drying processes.

The invention discloses a preparation method for a compound super absorbent resin containing kieselguhr and cellulose. The method comprises the following steps: firstly modifying the kieselguhr by using hydrochloric acid solution, adding acrylate, acrylamide and the modified kieselguhr which are processed by ultrasound to the swelling cellulose and premixing, and adding a potassium persulfate initiator to induce to generate a free radical, finally adding an N,N'-methylene bisacrylamide cross-linking agent, generating a gel-like compound by copolymerization, drying, and smashing to obtain the sodium polyacrylate/polyacrylamide/kieselguhr/cellulose compound super absorbent resin. The water absorption rate of the compound resin under the room temperature is up to 660.98 g/g, and the absorption rate of 0.9% of normal saline is up to 90.56 g/g. In addition, the heat stability of the compound super absorbent resin is higher, the compound super absorbent resin has the excellent comprehensive performances of good water-absorbing property, salt resistance, heat resistance, high water-retaining property and biocompatibility, and is particularly suitable for the fields, such as agriculture and forestry, environmental protection, and park.

The invention relates to the technical field of wood pulp wet tissue manufacturing and concretely relates to a different-shape polyester fiber and wood pulp cellulose compound spunlacing wet tissue cloth and a preparation method for the same. The different-shape polyester fiber and wood pulp cellulose compound spunlacing wet tissue cloth is prepared by 25wt% of polyester fibers, 25wt% of hollow polyester fibers and 50wt% of wood pulp fibers via a spunlacing way, or prepared by 50wt% of hollow polyester fibers and 50wt% of wood pulp fibers via a spunlacing way. Compared with the prior art, a wet papermaking technology and carded web-forming spunlacing technology are integrated to one production line and the products are mainly composite cloth; the product prepared by the method is mainly characterized by great water absorbing property, static resistance, even net formation, binder avoidance, bacteria shielding, softness and ventilation; the wood pulp layer and the polyester fiber layer can be formed online; and the proportion of the hollow polyester fibers, the polyester fibers and the wood pulp fibers can be flexibly adjusted, so the thickness of the product can be flexibly adjusted.

Paint formulations that exhibit improved performance characteristics due to the presence of a combination of a cellulose ether (carboxymethylcellulose and/or hydroxyethylcellulose) and a network building polymer (gellan gum, carrageenan, etc., as examples) as a thickening system therein are provided. Such a combination permits long-term shelf stability of the paint formulation while simultaneously according effective flow, leveling, and other important properties to the final paint formulation. The combination of the cellulose ether and a network building polymer allows for a lower viscosity cellulosic compound to impart the desired rheological behavior therein while also permitting the other desirable characteristics noted above. Such paint compositions also exhibit improved atomization for spray applications with such a thickening system.

The invention relates to a method for improving boiling property and palatability of germinated brown rice, which belongs to the technical field of food machining. The method specifically comprises treating brown rice by using ultrasonic auxiliary external cellulose compound pectinase, and through the synergistic effect of endogenous enzyme activated when the brown rice sprouts, the brown rice cortex is subjected to partial hydrolysis, so as to make the germinated brown rice cortex loose and porous. The germinated brown rice produced by using the method is good in boiling property, light in bran wax taste and good in palatability, and the hardness of the germinated brown rice after being boiled is reduced by 10-30% when being compared with the hardness of the untreated germinated brown rice.

The present invention relates to a cellulose compound hollow fiber membrane having high mechanical strength and is hardly degraded by microorganisms, wherein a cellulose compound is comprised as a membrane material, the thickness of the membrane is 50 to 500 mum, a dense membrane surface having an average pore diameter of 0.001 to 0.05 mum exists on the internal and/or external surface thereof, the inside of the membrane is composed of a three-dimensional network-like porous structure having voids with an average pore diameter of 0.05 to 2 mum, and 70% by weight or more of the membrane material is cellulose acetate propionate or cellulose acetate butyrate.</PTEXT>

The invention relates to a soil water retaining agent, in particular to a starch and a cellulose compound water retaining agent and preparation thereof, comprising the ingredients, based on parts by weight of: 100-200 parts of organic substances, 0.2-3 parts of active covering agent, 150-200 parts of acrylamide, 50-100 parts of starch, 20-50 parts of attapulgite, 20-40 parts of perlite, 2-4 parts of initiators and 0.5-1 part of crosslinking agent. The compound soil water retaining agent of the invention simultaneously retains the advantages of starch and cellulose water retaining agents, and can play a role of improving the soil structure owing to the addition of equivalent organic materials therein; the addition of humic acid is capable of serving as a urease inhibitor to a certain extent, which enhances the utilization ratio of a fertilizer N that is applied along with the water retaining agent.