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Medical hydrogel dressings and preparation method thereof
ActiveCN101982202AHigh swellingStable in humid environmentAbsorbent padsBandagesCross-linkTissue Compatibility
The invention relates to a medical hydrogel dressings and a preparation method thereof. The hydrogel dressings is prepared by taking 10-30% by mass of starch and 2-15% by mass of water-soluble polymer as raw materials, utilizing a guanidinesalt polycondensate as an anti-bacterial agent, adding a cross-linking agent, and reacting at the temperature of 40-80 DEG C. The operation steps are as follows: adding the starch and the water-soluble polymer in a solvent to prepare into a solution, regulating the pH value of the solution by a NaOH solution, heating for gelatinization, cooling, adding the anti-bacterial agent and the cross-linking agent, stirring to form a mixed solution, pouring the mixed solution into a die, and reacting at the temperature of 40-80 DEG C to obtain the anti-bacterial hydrogel. Compared with the prior art, the hydrogel dressings in the invention has the advantages of good swelling property, high transparency, moderate mechanic strength, excellent bacteria invasion resistance, wide raw material sources, cheap raw materials, good tissue compatibility and favorable medical application prospect, and can effectively prevent wound infection.
Owner:EAST CHINA UNIV OF SCI & TECH
Method for preparing a two-phase water-absorbent bioadhesive composition
InactiveUS20050049365A1High swellingEasy to modifyCosmetic preparationsImpression capsWound dressingHydrophobic polymer
A method is provided for preparing an adhesive composition that contains both a hydrophobic phase and a hydrophilic phase, wherein the hydrophobic phase is composed of a crosslinked hydrophobic polymer composition and the hydrophilic phase is a water-absorbent blend of a hydrophilic polymer and a complementary oligomer capable of crosslinking the hydrophilic polymer through hydrogen bonding, ionic bonding, and / or covalent bonding. The composition is useful as a bioadhesive, for affixing drug delivery systems, wound dressings, bandages, cushions, or the like to a body surface such as skin or mucosal tissue.
Owner:CORIUM INC
Method for preparing a two-phase water-absorbent bioadhesive composition
InactiveUS7138458B2High swellingEasy to modifyCosmetic preparationsImpression capsHydrophilic polymersWound dressing
A method is provided for preparing an adhesive composition that contains both a hydrophobic phase and a hydrophilic phase, wherein the hydrophobic phase is composed of a crosslinked hydrophobic polymer composition and the hydrophilic phase is a water-absorbent blend of a hydrophilic polymer and a complementary oligomer capable of crosslinking the hydrophilic polymer through hydrogen bonding, ionic bonding, and / or covalent bonding. The composition is useful as a bioadhesive, for affixing drug delivery systems, wound dressings, bandages, cushions, or the like to a body surface such as skin or mucosal tissue.
Owner:CORIUM INC
Multi-layered paper coating latex having high swelling and contraction property, method for preparing the same, and paper coating composition containing the same
ActiveUS20080097019A1High swellingHigh contraction propertyPaper coatingCoatingsPolymer scienceGlass transition
Disclosed are paper coating latex, a method for preparing the same, and paper coating composition containing the same, characterized in that in the paper coating latex having a core-shell structure, the core is formed by the polymerization of monomer mixtures comprising 5 to 35 weight parts of ethylene unsaturated acid based on 100 weight parts of the core and the shell has glass transition temperature up to room temperature, lower than that of the core. The present invention has an effect of providing a high quality matte coated paper that has excellent printability such as ink drying rate, adhesion, etc., as well as low white paper gloss and improved print gloss by coating paper coating composition containing multi-layered paper coating latex having high swelling and contraction property on paper.
Owner:LG CHEM LTD
High swell, long-lived hydrogel sealant
A high swell, long-lived hydrogel sealant formed by reacting a highly oxidized polysaccharide containing aldehyde groups with a multi-arm amine is described. The hydrogel sealant may be particularly suitable for applications requiring high swell and slow degradation, for example, tissue augmentation, both cosmetic and reconstructive; void filling; tissue bulking, for example treatment of urinary incontinence and acid reflux; and embolization. The high swell, long-lived hydrogel sealant may also be useful as a tissue sealant and adhesive, and as an anti-adhesion barrier.
Owner:ACTAMAX SURGICAL MATERIALS
Medical hydrogel wound dressing and preparation method thereof
The invention discloses a preparation method of a medical hydrogel wound dressing, 20 to 30 percent by weight of sodium polyacrylate, 2 to 6 percent by weight of polyvinyl alcohol and 60 to 78 percent by weight of water are taken as raw materials, the medical hydrogel wound dressing is obtained by casting, radiation cross-linking grafting and sterilization, the radiation dose rate is 15kGy / time, and the dose is 30 to 90kGy. The hydrogel wound dressing obtained by the invention has very high swelling degree and can greatly reduce the replacement of the dressing and be doped with a cell growth factor for slow release, thus being the ideal wound dressing for treating various burns, scalds, trauma wounds and other wounds, more particularly, the large-area and hypertonic skin wounds; furthermore, the preparation process is simple and the cost is slow, thus having good industrial application prospect.
Owner:SUZHOU UNIV
Two-phase, water-absorbent bioadhesive composition for delivery of an active agent to a patient
An adhesive composition is provided that contains both a hydrophobic phase and a hydrophilic phase, wherein the hydrophobic phase is composed of a crosslinked hydrophobic polymer composition and the hydrophilic phase is a water-absorbent blend of a hydrophilic polymer and a complementary oligomer capable of crosslinking the hydrophilic polymer through hydrogen bonding, ionic bonding, and / or covalent bonding. The composition is useful as a bioadhesive, for affixing drug delivery systems, wound dressings, bandages, cushions, or the like to a body surface such as skin or mucosal tissue.
Owner:CLEARY GARY W +3
Mushroom dietary fiber compound seasoning and production method thereof
InactiveCN103766843AIncrease health functionPromote dissolutionFood ingredientsFood shapingFiberDietary fiber
The invention relates to a mushroom dietary fiber compound seasoning and a production method thereof, which are characterized in that the compound seasoning is prepared by taking mushroom as a raw material through the steps of carrying out selecting, washing, microwave enzyme deactivation, homogenizing, enzymolysis, concentration, microwave drying, extruding, superfine grinding and the like on the mushroom so as to obtain mushroom dietary fiber powder; compounding the mushroom dietary fiber powder with salt, white granulated sugar, chicken essence, beta-Cyclodextrins, CMC-Na, garlic powder, ginger powder, chili powder, paprika powder, curry powder, and then sterilizing and packaging to obtain the product. The mushroom dietary fiber compound seasoning prepared according to the invention is rich in nutrition, delicious in flavor and good in dispersibility; the dietary fiber content of the product is 5-20%, therefore, the mushroom dietary fiber compound seasoning is a health-care seasoning.
Owner:XUZHOU KUNYUAN FOOD
Hydroscopic cellulose hydrogel and preparation method thereof
The invention relates to a hydroscopic cellulose hydrogel and a preparation method thereof. The preparation method of the hydrogel is as follows: carboxymethyl cellulose and cellulose are respectively dissolved in the water solution of NaOH / urea in which the concentration of NaOH is 6-10wt%, and the concentration of the urea is 4-12wt%; the NaOH / urea mixed water solution of 1-5wt% of the carboxymethyl cellulose and the NaOH / urea mixed water solution of 1-5wt% of the cellulose are obtained; then the NaOH / urea mixed water solution of the carboxymethyl cellulose and the NaOH / urea mixed water solution of cellulose are mixed according to the weight ratio: 9:1-1:9 and stirred evenly, and the mixed solution is obtained; the mixed solution is also added with certain amount of cross linker epoxy chloropropane; after the chemical cross linking reaction, the mixed solution is placed at the gelatin temperature until the hydroscopic cellulose hydrogel is formed, wherein, the water absorbing capacity is 50-1,000g / g. The hydrogel has very good salt sensitivity and high hydroscopicity and is capable of being widely used in the fields of agriculture, health care and medicine.
Owner:WUHAN UNIV
Preparation of porous high-swelling gelatin microspheres
ActiveCN104177643AHigh swellingHigh drug loading rateSurgeryGranular deliveryEthyl esterWater soluble
The invention discloses a preparation method of porous high-swelling gelatin microspheres. The preparation method comprises the following steps: preparing gelatin into a water solution with the mass concentration of 30%, adding another component as a pore-foaming agent, wherein the pore-foaming agent can be an inorganic substance such as nano calcium carbonate powder as well as a water-soluble high polymer such as polyethylene glycol, polyvinyl alcohol, polymethylacrylic acid-2-(N,N-dimethyl) amino ethyl ester, uniformly mixing the water solution of gelatin with the pore-foaming agent, suspending and dispersing in paroline, adding a spann-80 and tween-60 mixed stabilizer, slowly dropwise adding a formaldehyde solution while stirring, reacting for hours so that the gelatin is crosslinked; then, filtering and separating microspheres, removing the pore-foaming agent, purifying and drying, thus obtaining the porous high-swelling gelatin microspheres. When the microspheres are used as a medicine-carrying embolic agent, the medicine carrying rate and the medicine carrying speed of medicines can be increased, and the use performance is improved.
Owner:JIANGSU GOLDEN AUTUMN CORD CO LTD
Multi-responsive pNIPAAm (poly(N-isopropylacrylamide))/(mPEG-g-CMCS) (methoxy polyethylene glycol-g-carboxymethyl chitosan) aquagel
The invention discloses a multi-responsive pNIPAAm (poly(N-isopropylacrylamide)) / (mPEG-g-CMCS) (methoxy polyethylene glycol-g-carboxymethyl chitosan) aquagel and a preparation method thereof. The aquagel is prepared by the following steps: modifying mPEG with formyl group, grafting with natural polysaccharide CMCS to form mPEG-g-CMCS, and carrying out crosslinking reaction with NIPAAm (N-isopropylacrylamide). The preparation method comprises the following steps: modifying the mPEG with formyl group by using acetic anhydride, and carrying out reduction grafting on the CMCS by using NaBH4 to obtain the mPEG-g-CMCS; and dissolving the mPEG-g-CMCS, N,N'-methylene-bis-acrylamide and NIPAAm in deionized water, introducing argon to remove oxygen, carrying out sealed refrigeration at 4 DEG C for 1 hour, and adding N,N,N',N-tetramethyl ethylene diamine and ammonium persulfate at room temperature to react for 24 hours, thereby obtaining the pNIPAAm / (mPEG-g-CMCS) aquagel. The method is simple to operate, and has the advantages of cheap raw materials and wide resources. The prepared aquagel has the advantages of dual sensitivity to temperature and pH and high degree of swelling. Compared with the pure pNIPAAm, the aquagel has very high biocompatibility and wider application range.
Owner:FUZHOU UNIVERSITY
Medical hydrogel dressings and preparation method thereof
ActiveCN101982202BHigh swellingStable in humid environmentAbsorbent padsBandagesCross-linkTissue Compatibility
The invention relates to a medical hydrogel dressings and a preparation method thereof. The hydrogel dressings is prepared by taking 10-30% by mass of starch and 2-15% by mass of water-soluble polymer as raw materials, utilizing a guanidinesalt polycondensate as an anti-bacterial agent, adding a cross-linking agent, and reacting at the temperature of 40-80 DEG C. The operation steps are as follows: adding the starch and the water-soluble polymer in a solvent to prepare into a solution, regulating the pH value of the solution by a NaOH solution, heating for gelatinization, cooling, adding the anti-bacterial agent and the cross-linking agent, stirring to form a mixed solution, pouring the mixed solution into a die, and reacting at the temperature of 40-80 DEG C to obtain the anti-bacterial hydrogel. Compared with the prior art, the hydrogel dressings in the invention has the advantages of good swelling property, high transparency, moderate mechanic strength, excellent bacteria invasion resistance, wide raw material sources, cheap raw materials, good tissue compatibility and favorable medical application prospect, and can effectively prevent wound infection.
Owner:EAST CHINA UNIV OF SCI & TECH
Preparation method of cross-linked sodium carboxymethyl cellulose
ActiveCN102604131AHigh light transmittanceHigh viscosityPigment treatment with non-polymer organic compoundsCross-linkNano composites
The invention relates to a preparation method of cross-linked sodium carboxymethyl cellulose. The preparation method of the cross-linked sodium carboxymethyl cellulose comprises the following steps of: adding an inorganic acid catalyst into sodium carboxymethyl cellulose solution to change a reaction system to be acidic; after reaction, adding a cross-linking agent; removing oxygen and charging nitrogen; prepolymerizing and polymerizing to obtain cross-linked carboxymethyl cellulose solution; dropwise adding alkalized ethanol-water solution to obtain cross-linked sodium carboxymethyl cellulose solution; and drying to obtain the cross-linked sodium carboxymethyl cellulose powder. According to the preparation method, a silicon dioxide composite nanomaterial, silicon dioxide-hydroxyl propyl acrylate, is used as the cross-linking agent, sodium carboxymethyl cellulose is used as a raw material, and cross-linking is performed under an alkaline condition to prepare the cross-linked sodium carboxymethyl cellulose. The cross-linked sodium carboxymethyl cellulose prepare by the invention has the characteristics of high transparence, high viscosity, high swelling degree and the like, and hasextremely high industrial application value.
Owner:美信佳中维药业股份有限公司
Double in-situ synthesis method of temperature-responsive nano silver composite hydrogel
The invention relates to a double in-situ synthesis method of temperature-responsive nano silver composite hydrogel. By adopting an ultraviolet radiation method, under a condition without an initiator and a reducing agent, with dimethylaminoethyl methacrylate and 2-acrylamide-2-methylpropanesulfonic acid as monomers, N,N'-methylene bisacrylamide as a cross-linking agent, polyethylene glycol 400 as a pore forming agent, and silver nitrate as a metal source, and under a nitrogen atmosphere, the temperature-responsive nano Ag / P(DMAEMA-g-AMPS) composite hydrogel is synthesized. The prepared nano silver composite hydrogel has uniform dispersed nano silver particles and good chemical cross-linking stability, allows the swelling degree to be increased by 294.8 compared with that of pure water gel, and improves water absorbency and water retention of the hydrogel; the composite hydrogel allows temperature responsiveness to be enhanced, thereby being beneficial for medical drug release and other applications; and the composite hydrogel allows the thermal decomposition temperature to be decreased by 78 DEG C compared with that of pure hydrogel, thereby being beneficial for polymer waste post-processing.
Owner:ANHUI UNIV OF SCI & TECH
Preparation method and application of nano chitosan
ActiveCN105037582AMild preparation conditionsImprove securityProsthesisChemical reactionMicroparticle
Preparation of nano chitosan in the invention almost has no chemical reaction, chitosan is mainly dissolved and dispersed, and chitosan is not dissolved in a sodium hydroxide solution, so that chitosan particles are separated out. Meanwhile, preparation conditions are mild, the safety is high, and preparation raw materials are common and nontoxic. The obtained nano chitosan is an ideal raw material for preparing artificial skin, the prepared artificial skin is soft in texture and is comfortable, the laminating performance between the prepared artificial skin and a wound surface is good, and the prepared artificial skin is breathable, can absorb water, has antibacterial and anti-inflammatory effects, and has the functions of stopping pain, arresting bleeding and promoting wound healing. Along with the healing of the wound of a patient and the growth of the skin of the patient, the chitosan artificial skin can be automatically dissolved and absorbed by the body, scraps cannot be left so as to avoid the delay of wound healing, and skin regeneration can be promoted. Moreover, the operation is simple, the safety is improved, and preparation processes are simplified. Required instruments are relatively common so as to be favorable for reducing the cost, and thus the nano chitosan has important application value in the field of artificial skin.
Owner:SHANDONG ANTE BIOTECH CO LTD
Bioresorbable microparticles
ActiveUS20140205665A1Improve degradation rateReduce probabilityPowder deliverySenses disorderMedicineActive agent
Polyurethane microparticles are derived from structural units comprising poly(alkylene oxide) moieties, caprolactone moieties and urethane moieties. The microparticles may include an active agent and have a particle size from 0.1 to 100 microns. Microparticles for injection have a particle size of 15 to 80 microns; for use as a aerosol 1 to 3 microns; and for intraocular use 0.02 to 2 microns. Dispersivity is in the range 1 to 3.
Owner:FERRING BV
Preparation method of super absorbent resin for cables or optical cables
The invention discloses a preparation method of super absorbent resin for cables or optical cables. The preparation method comprises: adding a partially neutralized acrylic acid solution containing an initiator and a cross-linking agent into petroleum hydrocarbon containing an anionic-nonionic surfactant and a polymeric protective colloid for anti-phase suspension polymerization, to prepare the super absorbent resin which has high porosity and large specific surface area in the interior, has rapid water absorption rate and high swelling capacity, and is applied to the cables or the optical cables.
Owner:浙江卫星新材料科技有限公司
Polyvinyl alcohol film with high swelling degree and preparation method thereof
The invention discloses a polyvinyl alcohol film with the high swelling degree and a preparation method thereof. The polyvinyl alcohol film is prepared from a film preparing stock solution containing a polyvinyl alcohol polymer, polypropylene glycol, polyalcohol and a solvent, wherein after the polyvinyl alcohol film is infiltrated in 20-30-DEG C distilled water for 2-4 h, the highest swelling degree reaches 430%. The preparation method comprises the following steps that 1, the film preparing stock solution containing the polyvinyl alcohol polymer, polypropylene glycol, polyalcohol and the solvent is prepared; 2, the film preparing stock solution is tape-casted into a film and dried at constant temperature to obtain the polyvinyl alcohol film with the high swelling degree. Compared with the prior art, the preparation process is simple and easy to master, and the prepared polyvinyl alcohol film has the very high swelling degree and can be used as a raw material for manufacturing a polarizing film with the high polarizing property.
Owner:CHINA PETROLEUM & CHEM CORP +1
Medical hydrogel wound dressing and preparation method thereof
ActiveCN101293110BHigh swellingReduce replacementAbsorbent padsBandagesWound dressingPolyvinyl alcohol
An improved hydrogel wound dressing and its preparation is disclosed. The ingredients used in the dressing are PAAS of 20~30 wt %, PVA of 2~6 wt % and water of 64~78 wt %. The hydrogel wound dressings were formed by dissolution, casting films, radiation synthesis and sterilization. Compared with conventional hydrogel dressings the improved dressings displayed an enhanced degree of swelling. Cell growth factors may be incorporated into the dressings to be released slowly in the wound.
Owner:SUZHOU UNIV
High swelling ramming paste for aluminum electrolysis cell
InactiveUS20070138445A1High swellingPromote swellingElectric discharge heatingConductive materialDiluentAnthracite
A new ramming paste for aluminum reduction cell cathodes is a high swelling cold ramming paste made of a blend of pitch, light oil diluent and an aggregate comprising a mixture of anthracite and crushed anode butts or calcined coke. The presence of the crushed anode butts or calcined coke increases the sodium swelling index of the paste by about four times higher than that of regular ramming pastes. This new high swelling cold ramming paste may also contain an amount of a refractory hard material, such as TiB2.
Owner:ALCAN INT LTD
Enzyme-loaded bacterial cellulose-based composite antibacterial hydrogel dressing and preparation method thereof
ActiveCN110507848AWith waterproof and breathable functionNo stimulus rejectionAbsorbent padsBandagesFiberSilica gel
The present invention discloses an enzyme-loaded bacterial cellulose-based composite antibacterial hydrogel dressing and a preparation method thereof. A hydrogel layer is formed by free radical polymerization on a skeleton structure of bacterial cellulose to form an interpenetrating dual network structure by introducing a polymer of poly-N-isopropyl acrylamide, besides, the hydrogel layer is usedas a carrier to load a biological antibacterial agent, and thus the "ideal" medical wound hydrogel dressing with highly effective moisturizing and antibacterial functions is obtained. The obtained hydrogel dressing product has good swelling and mechanical properties, is relatively high in transparency, and a silicone layer plays a waterproof and breathable role and can maintain a closed and humidenvironment around wounds and in wound areas; and at the same time, the hydrogel layer has good actericidal and antibacterial properties to methicillin-resistant staphylococcus aureus and is conductive for resisting wound infections and promoting wound healing, besides, the skeleton material has a wide range of bacterial fiber raw materials, is low in price, good in histocompatibility and weak inantigenicity, does not cause foreign bodies, inflammation and rejection, and has good medical application prospects.
Owner:SHANGQIU NORMAL UNIVERSITY
Hydroscopic cellulose hydrogel and preparation method thereof
The invention relates to a hydroscopic cellulose hydrogel and a preparation method thereof. The preparation method of the hydrogel is as follows: carboxymethyl cellulose and cellulose are respectively dissolved in the water solution of NaOH / urea in which the concentration of NaOH is 6-10wt%, and the concentration of the urea is 4-12wt%; the NaOH / urea mixed water solution of 1-5wt% of the carboxymethyl cellulose and the NaOH / urea mixed water solution of 1-5wt% of the cellulose are obtained; then the NaOH / urea mixed water solution of the carboxymethyl cellulose and the NaOH / urea mixed water solution of cellulose are mixed according to the weight ratio: 9:1-1:9 and stirred evenly, and the mixed solution is obtained; the mixed solution is also added with certain amount of cross linker epoxy chloropropane; after the chemical cross linking reaction, the mixed solution is placed at the gelatin temperature until the hydroscopic cellulose hydrogel is formed, wherein, the water absorbing capacity is 50-1,000g / g. The hydrogel has very good salt sensitivity and high hydroscopicity and is capable of being widely used in the fields of agriculture, health care and medicine.
Owner:WUHAN UNIV
High-swelling-degree AFL, preparation method and high-swelling-degree AFL ceramic diaphragm
ActiveCN112952290AReduced Dimensional VariationsAvoid poor interface contactLi-accumulatorsCell component detailsComposite materialPolymer chemistry
The invention belongs to the technical field of diaphragms, and particularly relates to a high-swelling-degree AFL, a preparation method of the high-swelling-degree AFL and a high-swelling-degree AFL ceramic diaphragm. The high-swelling-degree AFL comprises PMMA and PAN, wherein the outer layer of the PMMA is coated with the PAN, and the swelling degree of the PMMA is not lower than 90%. According to the high-swelling-degree AFL, the outer layer of PMMA with the swelling degree not lower than 90% is wrapped with PAN, so that the inner layer PMMA keeps higher swelling degree, and the situation that when the high-swelling-degree AFL is used for a lithium battery, PMMA continues to swell, so that the size is increased, and the performance of the lithium battery is affected, is avoided.
Owner:JIANGSU HORIZON NEW ENERGY TECH CO LTD
Method for preparing and preserving hot-boiling-stable fish noodles
InactiveCN102429168BImprove thermal processing stabilityPleasant flavorFood preparationNano zinc oxideWheat gluten
The invention discloses a method for preparing and preserving hot-boiling-stable fish noodles, which belongs to the technical field of food processing. The method comprises the following steps of: preparing fishes into minced fillet; adding salt and seasonings for chopping; kneading dough, slowly and uniformly adding a sodium alginate aqueous solution, wheat gluten and a nano-zinc oxide aqueous solution in a dough kneading and stirring process; and curing, tableting, slitting, drying and packing to obtain a hot-boiling-stable fish noodle product. In the method, raw materials are processed into seasoning minced fillet, so that the fish noodles have the strong fragrance of fish; sodium alginate and the wheat gluten are added, so that the rheological characterization of the flour dough can be changed under the coaction of the sodium alginate and the wheat gluten, the gel property of the minced fillet is improved, and the hot-boiling stability of the fish noodles is improved; the nano-zinc oxide is added, so that the preserving property of the fish noodles is improved, the content of zinc in the fish noodles is increased, and the nutritional value of the fish noodles is raised; and atlast, the fish noodles are packed by charging inert gas in vacuum, so that the shelf life of the fish noodles is prolonged, and the nutritional value of the fish noodles is kept to the maximum extentin the preserving process.
Owner:江苏省山水食品有限公司 +1
Preparation method of cross-linked sodium carboxymethyl cellulose
ActiveCN102604131BHigh light transmittanceHigh viscosityPigment treatment with non-polymer organic compoundsCross-linkNano composites
The invention relates to a preparation method of cross-linked sodium carboxymethyl cellulose. The preparation method of the cross-linked sodium carboxymethyl cellulose comprises the following steps of: adding an inorganic acid catalyst into sodium carboxymethyl cellulose solution to change a reaction system to be acidic; after reaction, adding a cross-linking agent; removing oxygen and charging nitrogen; prepolymerizing and polymerizing to obtain cross-linked carboxymethyl cellulose solution; dropwise adding alkalized ethanol-water solution to obtain cross-linked sodium carboxymethyl cellulose solution; and drying to obtain the cross-linked sodium carboxymethyl cellulose powder. According to the preparation method, a silicon dioxide composite nanomaterial, silicon dioxide-hydroxyl propyl acrylate, is used as the cross-linking agent, sodium carboxymethyl cellulose is used as a raw material, and cross-linking is performed under an alkaline condition to prepare the cross-linked sodium carboxymethyl cellulose. The cross-linked sodium carboxymethyl cellulose prepare by the invention has the characteristics of high transparence, high viscosity, high swelling degree and the like, and has extremely high industrial application value.
Owner:美信佳中维药业股份有限公司
Painting paper added with blanching bamboo pulp meal and fiber grafting agent and preparation method of painting paper
ActiveCN104963233AGood flexibilityGood ink absorptionSpecial paperNon-macromolecular organic additionFiberPolymer science
The invention relates to the technical field of papermaking, in particular relates to a manufacturing technique of painting paper, and more particularly relates to a method for preparing the painting paper by adding the blanching bamboo pulp meal and the fiber grafting agent. The painting paper is characterized by comprising pulp material and auxiliary materials, wherein the pulp material comprises 20wt%-90wt% of blanching bamboo pulp and 10-80wt% of blanching bamboo pulp meal, and based on the weight of the pulp material, the auxiliary materials comprise 0.5wt%-1.5wt% of talcum powder, 0.05wt%-1.0wt% of the fiber grafting agent and 0.1wt%-1.0wt% of oleander glue. The painting paper has the characteristics of low compactness, high bulk, large fracture length, good water-absorbing quality, high toughness, high ink absorption, high size stability and low yellowing rate, is hardly prone to damage by worm or mildewing, and be can stored for a long time; the preparation method is simple, easy to operate and low in cost.
Owner:SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
A kind of cooling clothing hydrogel-cotton composite material and preparation method thereof
The invention belongs to the technical field of cooling materials, and proposes a hydrogel-cotton composite material for cooling clothes, which is composed of the following components in parts by weight: 5-50 parts of cotton, 5-30 parts of hydrophilic polymer, water-soluble single Body 10-50 parts, initiator 0.01-2 parts, cross-linking agent 0.1-2 parts. The present invention also proposes a method for preparing a hydrogel-cotton composite material for cooling clothing, comprising the following steps: soaking the cotton with a hydrophilic polymer, freezing, and thawing after containing water-soluble monomers and hydrophilic polymers , initiator, and cross-linking agent in the mixed aqueous solution and then taken out, initiated by ultraviolet light at room temperature or polymerized under the condition of thermal initiation at 40-80°C, and freeze-dried to obtain the hydrogel-cotton composite material for cooling clothes. The invention solves the problems in the prior art that the hydrogel particles or powders of the cooling clothes are unevenly dispersed, easy to ooze out, and pollute the environment.
Owner:GUANGDONG TIDAKANG MEDICAL TECH CO LTD
The Method of Macromolecular Electrolyte to Improve the Water Absorption of Neutral Hydrogel
The invention relates to a method for increasing a neutral hydrogel water absorption ratio by adopting macromolecule electrolyte. The method is characterized by comprising the following steps: step 1: completely soaking neutral hydrogel into a mixed solution consisting of electrolyte monomer and initiator, soaking the neutral hydrogel water absorption ratio under the room temperature for 1 to 3 days to reach swelling equilibrium, and the initiator is a photo initiator or a thermal initiator; step 2: taking out the soaked neutral hydrogel in the step 1, initiating the polymerization reaction of the electrolyte monomer sucked by the neutral hydrogel by applying ultraviolet or heating, soaking the reacted neutral hydrogel in the deionized water for 3 days to reach swelling equilibrium, changing the water twice a day, removing the electrolyte monomer and initiator which are not completely reacted to obtain the high-water-absorption-ratio neutral hydrogel. By adopting the method, the consumption of a crosslinking agent of the hydrogel is not changed, the mechanical performance is not reduced, simplicity in operation can be realized, and the water absorption ratio of the neutral hydrogel can be increased. The application value of the method in the fields such as medical sanitation, industry, agriculture and the like is high.
Owner:HUBEI UNIV OF TECH
Sericin-based semi-interpenetrating temperature-sensitive nano-composite hydro-gel and preparation method thereof
Owner:TIANJIN POLYTECHNIC UNIV
A kind of calligraphy and painting paper added with bleached bamboo pulp and fiber grafting agent and its preparation method
ActiveCN104963233BGood flexibilityGood ink absorptionSpecial paperNon-macromolecular organic additionFiberPapermaking
The invention relates to the technical field of papermaking, in particular relates to a manufacturing technique of painting paper, and more particularly relates to a method for preparing the painting paper by adding the blanching bamboo pulp meal and the fiber grafting agent. The painting paper is characterized by comprising pulp material and auxiliary materials, wherein the pulp material comprises 20wt%-90wt% of blanching bamboo pulp and 10-80wt% of blanching bamboo pulp meal, and based on the weight of the pulp material, the auxiliary materials comprise 0.5wt%-1.5wt% of talcum powder, 0.05wt%-1.0wt% of the fiber grafting agent and 0.1wt%-1.0wt% of oleander glue. The painting paper has the characteristics of low compactness, high bulk, large fracture length, good water-absorbing quality, high toughness, high ink absorption, high size stability and low yellowing rate, is hardly prone to damage by worm or mildewing, and be can stored for a long time; the preparation method is simple, easy to operate and low in cost.
Owner:SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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