45 results about "Cellulose sulfate" patented technology

The invention provides a corrosion-resistant polymer waterproof mortar, which comprises the following components by weight: 40-50 parts of portland cement, 2-3 parts of polymethyl acrylate latex powder, 2-3 parts of ethylene-vinyl acetate latex powder, 1-2 parts of vinyl chloride-vinylidene chloride copolymerized latex powder, 1-2 parts of polyacrylate latex powder, 3-5 parts of polypropylene fibers, 3-5 parts of cellulose ether, 3-7 parts of inorganic fibers, 6-12 parts of plant fibers, 3-5 parts of cellulose sulfate, 2-4 parts of cellulose phosphate, 1-2 parts of phenyl salicylate, 1-3 parts of polyimide particles, 5-8 parts of quartz sand, 10-15 parts of gypsum, 5-9 parts of fly ash, 4-7 parts of bentonite, 3-6 parts of molybdenum trioxide, 2-5 parts of silicon oxide, 1-2 parts of citric acid, 5-8 parts of calcium nitrate, 5-8 parts of diatomite, 2-8 parts of polyvinyl alcohol, 3-6 parts of dried alum, 1-2 parts of a surfactant, and 20-30 parts of water.

The invention provides a novel clean production process for synthesizing cellulose sulfate at high conversion rate and high quality in an aprotic solvent in the absence of an acid-binding agent based on SO3 and fiber as raw materials. The novel clean production process is simple in process, mild in condition, recyclable in reaction materials, high in conversion rate, good in product quality and free of toxic and side ion and solvent residual; the cellulose sulfate product is wide to apply and has a huge industrial application prospect.

The invention discloses a layer-by-layer click bonding self-assembly-based polylactic acid material and a preparation method thereof. The polylactic acid material is prepared from a base material and a modified layer. The preparation method comprises the steps of (1) azidation treatment of the surface of the polylactic acid material; (2) preparation of azide chitosan and alkynyl-containing cellulose sulfate; (3) preparation of an azide chitosan solution and an alkynyl-containing cellulose sulfate solution; and (4) layer-by-layer click bonding self-assembly of the azide chitosan and the alkynyl-containing cellulose sulfate on the surface of the polylactic acid material, namely alternately soaking the treated polylactic acid material into the azide chitosan solution and the alkynyl-containing cellulose sulfate solution for a period of time separately, taking out the polylactic acid material, cleaning by using ultra-pure water, drying and repeating the processes, so that layer-by-layer click self-assembly modification of the chitosan and the cellulose sulfate on the surface of the polylactic acid material is achieved. The material prepared by using the method has excellent protein adsorption resistance, and the surface hydrophilicity is significantly improved, thereby improving the blood compatibility of the surface of the material.

The invention discloses an antibacterial towel, belonging to the technical field of toiletries. The antibacterial towel is produced by the following steps: dissolving cellulose sulfate into water, and uniformly stirring with an aloe water extract and seaweed with particle size being less than 1 micron to obtain a spinning solution; spinning and weaving by use of the spinning solution; and performing boiling, dyeing, washing, softening, dehydration, drying and trimming treatment on the cloth to obtain the antibacterial towel. The antibacterial towel disclosed by the invention has antibacterial and anti-inflammatory functions; moreover, the production cost is low, the raw materials are natural, and no harmful chemical component is contained in the antibacterial towel.

The invention discloses aminocellulose and application thereof. A structure formula is shown in the description, wherein X is -SO3Na or -SO3NH4, and has the amino substitution degree DS being 0.50 to1.40. The cellulose sulfate is used as raw materials for synthesizing the aminocellulose together with ammoniation reagents through a one-step method; the raw material price is low; the resources arewide; the process is simple; the cost is low; the defects of complicated production process, severe reaction conditions, high raw material price and high process cost of the existing synthesis methodare overcome. The prepared aminocellulose has the advantages that the adsorption effect on heavy metal ions in the waste water is relatively good; the practical application value is relatively high.

The invention provides an application of bio-based sulfonate as a water-retaining agent and a slow-release inhibitor in preparation of a seedling hole tray. The bio-based sulfonate is prepared from cellulose sulfate monoester salt, hemicellulose sulfate monoester salt and lignosulfonate. The invention further provides the seedling hole tray prepared from the bio-based sulfonate. The seedling hole tray prepared from the bio-based sulfonate comprises paper pulp and the bio-based sulfonate, wherein the mass of the bio-based sulfonate accounts for 10-15% of total mass of the seedling hole tray.

The invention discloses a biological activity factor composition for promoting ossification and vascularization, which comprises a biological active factor and carboxylated polysaccharide, the biological activity factor is one or more selected from a bone morphogenetic protein, a transforming growth factor, a blood vessel endothelial growth factor, a basic fibroblast growth factor and an ossification protein; and the carboxylated polysaccharide is one or more selected from sulfonated chitosan, sulfonated glucan, heparin, heparin sulfate and sulfate cellulose. The invention also discloses a preparation method of a composition and a transplant containing the composition. The composition provided by the invention can promote the ossification and the blood vessel generation, can be composited with a medically acceptable carrier, and can be used in the field of bone defect repair by employing an implantation mode or an injection mode.

The present invention describes a modified cellulosic fiber having superabsorbent properties. The modified fiber of the invention has a fibrous structure substantially identical to the cellulosic fiber from which it is derived. The modified fiber is a water-swellable, water-insoluble fiber that substantially retains its fibrous structure in its expanded, water-swelled state. The modified fiber is a sulfated and crosslinked cellulosic fiber having a liquid absorption capacity of at least about 4 g/g. In one embodiment, the modified fiber is an individual, crosslinked, sulfated cellulosic fiber. In another aspect, the invention provides a rollgood that includes the modified fiber, absorbent composites and articles that include the modified fiber, and methods for making the modified cellulosic fiber.

The invention discloses a method for preparing cellulose sulfate. The method comprises the following steps: placing a container in a constant temperature environment at -10 DEG C to 0 DEG C, configuring a mixed reaction solution according to a mole ratio of 1:1 to 1:2.5 of waterless ethanol to sulfuric acid; adding 50g cellulose and 0 to 8g waterless sal glauberi into a 0.5L to 3L mixed reaction solution to react for 1 to 10 hours with a maintaining temperature of -10 DEG C to 0 DEG C, carrying out pumping filtration to the reaction solution and washing with ethanol until the pH value of washing liquid presents neutral; dissolving the filtrated residue in water with maintaining a temperature of 0 DEG C to 5 DEG C, dripping aqueous alkali until pH value is regulated to 7-9; carrying out pumping filtration at normal temperature wherein the filtrate is a cellulose sulfate aqueous solution with different polymerization degree and replacement degree, adding 1 to 50 times volume of ethanol in the aqueous solution for obtaining cellulose sulfate by centrifuging or filtering. The method of the invention employs cellulose for preparing cellulose sulfate, molecular weight and degree of substitution are controllable, The waterless ethanol is taken as a reagent with a better security, A food grade safety reagent is employed in the whole process, and no other harmful waste is generated in the reaction process which is environmental-friendly.

The invention belongs to the technical field of gel materials and discloses a cellulose sulfate hydrogel and a preparation method thereof. The preparation method of the hydrogel comprises the following steps: mixing cellulose and a sulfating agent for a sulfating reaction to obtain cellulose sulfate; suspending the cellulose sulfate in deionized water, and stirring until the solution is transparent; adjusting the pH value; adding glycerin and zwitterion as crosslinking agents, and stirring and mixing uniformly; and cooling and standing to obtain the cellulose sulfate hydrogel. According to the invention, by adopting mild low acid and long-time controllable sulfating, the molecular weight of the product is high; and by adding glycerin and zwitterion for crosslinking, the strength of the cellulose sulfate hydrogel is enhanced, and an important supplement effect is realized on the functional application of cellulose.

The invention discloses a PEDOT:CS water dispersion system taking cellulose sulfate as a template and a preparation method of the PEDOT:CS water dispersion system. The method comprises the following steps: adding cellulose sulfate into water to obtain a cellulose sulfate aqueous solution, and then adding a monomer EDOT to obtain a mixed solution; and adding ammonium persulfate and ferric chlorideinto the mixed solution for polymerization reaction to obtain a PEDOT:CS water dispersion system taking cellulose sulfate as a template. On one hand, the invention provides the method for preparing cellulose sulfate, and provides the new PEDOT water dispersion system by replacing PSS with cellulose sulfate as a polymerization template of PEDOT. On the other hand, the prepared PEDOT:CS aqueous dispersion has good system stability, high PEDOT content and high conductivity, and has good application prospects in the fields of electrochromism, electromagnetic shielding, supercapacitors, electrochemical sensors and the like.

The invention belongs to the technical field of porous microspheres, and discloses a chitosan cellulose sulfate magnetic porous composite microsphere as well as preparation and application thereof. The preparation method comprises the following steps: 1) dissolving chitosan and cellulose sulfate in an ionic liquid to obtain a mixed solution; 2) dispersing magnetic particles in the mixed solution to obtain a magnetic suspension; mixing the oil phase, an emulsifying agent and a pore-foaming agent to obtain an emulsifying system; and 3) dispersing the magnetic suspension in an emulsification system, emulsifying under a heating condition, carrying out alcohol precipitation, cooling, and carrying out subsequent treatment to obtain the chitosan cellulose sulfate magnetic porous composite microsphere. The method disclosed by the invention is simple, mild in condition, green and environment-friendly. The prepared magnetic porous composite microspheres are rich in pores, large in specific surface area, multiple in active sites and good in lipase immobilization effect. The magnetic porous composite microsphere is applied to enzyme immobilization, protein adsorption separation and protein drug delivery.

The preparation process of macroporous sodium cellulose sulfate-polydimethyl diallyl ammonium chloride biological microcapsule includes: compounding starch and sodium cellulose sulfate into mixed solution with starch in 0.7-1.5 wt% and sodium cellulose sulfate in 0.5-5 wt% as the anion polymer solution for the system; dropping the mixed solution into polydimethyl diallyl ammonium chloride solution to form microcapsule through the interface reaction between anion and cation for 40-120 min; washing the microcapsule; transferring to amylase solution of 1-2 % concentration, setting for 1-24 hr and re-washing. The present invention has independently regulated membrane permeability, microcapsule membrane characteristic altered via changing the sort and amount of starch, good biocompatibility of the materials, simple preparation process, and mild condition.

The present invention adopts sodium cellulose sulfate and PDMDAAC as the basic material of the microcapsule, and inorganic salt as membrane pore size controlling matter. The preparation process includes the following steps: compounding anionic polymer sodium cellulose sulfate solution of 3-5 wt% concentration; dropping into the solution containing sodium chloride or calcium chloride in 0-1.2 wt% and PDMDAAC in 2-8 wt% to produce anionic and cationic ion interface reaction forming capsule for 20-120 min; and washing the capsule. By means of altering the concentration of sodium chloride or calcium chloride in the solution, the capsule membrane pore size may be regulated, the entrapped molecular weight may be controlled and the penetrating performance of the capsule membrane may be altered. The present invention uses cheap materials of good biocompatibility and has simple process and mild condition.

The invention relates to an edible antibacterial food packaging film, and belongs to the technical field of films. The edible antibacterial food packaging film comprises cellulose sulfate or saltof the cellulose sulfate, soy isolate protein, a natural bacteriostatic agent and glycerinum, the edible antibacterial food packaging film is prepared from the compositions in parts by weight: 10-70 partsof the cellulose sulfate or the salt of the cellulose sulfate, 1-70 parts of the soy isolate protein, 1-10 parts of the natural bacteriostatic agent, and 1-5 parts of the glycerinum, the cellulose sulfate salt is sodium cellulose sulfate, and the natural bacteriostatic agent is thymol, eugenol, or cinnamic aldehyde. According to the edible antibacterial food packaging film, adopted materials are all non-toxic and edible materials, the prepared packaging film is edible and has antibacterial function, and has good application prospects.

The invention relates to special printing ink and particularly relates to flexible special extinction printing ink containing modified glass powder and a preparation method of the flexible special extinction printing ink. The flexible special extinction printing ink is prepared from the following raw materials in parts by weight: 20-30 parts of hydroxyl acrylic resin, 2-3 parts of lead-free glass powder, 30-38 parts of alkyd resin, 2-4 parts of vinyl n-butyl ether, 2-3 parts of amino silicon oil, 4-8 parts of ethylene glycol diglycidyl ether, 2-5 parts of cellulose sulfate, 1-3 parts of borax, 15-20 parts of a DBE solvent, 12-18 parts of ethyl acetate, 20-30 parts of environment-friendly pigment and 2-4 parts of auxiliaries. The flexible special extinction printing ink disclosed by the invention adopts the hydroxyl acrylic resin and the alkyd resin as connecting materials and adopts the environment-friendly low-toxicity solvent to greatly improve the environment friendliness of the printing ink; the lead-free glass powder containing borax molten and mixed in the raw materials is subjected to surface modification with amino silicon oil, and thus the dispersibility of the lead-free glass powder containing borax in a resin solution is improved, and the glass powder mixed with the borax is capable of effectively quickening the curing of the printing ink slurry. The printing ink coating obtained by the special printing ink disclosed by the invention is excellent in mechanical performance after being dried, unlikely to scrape off and soft in gloss. The printed object has a great aesthetic feeling.

The invention discloses a towel and a machining process thereof. The towel comprises the following components in mass percent: 30%-50% of mixed fibers, 10%-20% of milk protein fibers, 20%-30% of soybean protein composite fibers, 15%-25% of bamboo fibers and the balance of antibacterial functional polypropylene fibers, wherein the mixed fibers are formed by mixing 50%-60% of cellulose sulfate, 30%-35% of aloe water extract and 5%-20% of alga with the grain diameter less than 1 micron. According to the towel, the soft performance of the product is remarkably improved and the towel has the characteristics of water-absorbing property and the like; in a finishing process, a hydrophilic agent and a soft auxiliary agent do not need to be added, and the soft performance is not gradually weakened along the increasing of the use frequency, so that the service life of the towel is prolonged.

The invention discloses an anti-wear agent for mechanical lubricating oil and a preparation method of the anti-wear agent. The anti-wear agent is prepared from components in parts by weight as follows: 10-20 parts of sulfurized isobutene, 15-30 parts of chlorinated paraffin, 4-12 parts of ricinoleic acid, 3-8 parts of silica powder, 3-14 parts of nano titanium dioxide powder, 2-8 parts of magnesium oxide, 4-10 parts of cellulose sulfate, 2-8 parts of sulfonated graphene and 5-15 parts of nano-molybdenum disulfide. The preparation method is simple, and by means of the prepared anti-wear agent, engine wear can be reduced, and working life of each friction part can be prolonged.

The invention relates to a quasi-carboxymethyl chitosan polymer, a new process for synthesizing the polymer in one step and a composition containing the polymer. The cellulose sulfate monoester salt or bio-based mixed sulfate monoester salt is used as a raw material, a novel method for synthesizing the quasi-carboxymethyl chitosan polymer by one step through a substitution reaction with calcium glycinate in a water or alcohol-water system, in particular to the method for producing quasi-carboxymethyl chitosan with higher conversion rate and higher substitution degree in a shorter time and at lower temperature by using the alcohol-water system, and the process is simple and convenient in synthesis process, few in byproducts, high in substitution degree and suitable for industrial production, and separation and purification are easily carried out. According to the breakthrough technology, low-cost and large-scale production of the quasi-carboxymethyl chitosan becomes possible, and wide application of the quasi-carboxymethyl chitosan polymer with high cost performance in the fields of water-retaining agents, sustained and controlled release fertilizers, liquid foliar fertilizers, adhesives and the like is certainly promoted.