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168 results about "Hydroxypropyl Chitosan" patented technology

Hydroxypropyl chitosan / oxidized sodium alginate self-crosslinking antibacterial hydrogel material

The invention discloses a self-crosslinking antibacterial hydrogel material containing hydroxypropyl chitosan / oxidized sodium alginate. The material is made from the following components by mass percent: 1-25% of hydroxypropyl chitosan, 1-30% of oxidized sodium alginate, 0.01-0.5% of nano-silver and distilled water. The material is prepared by the following steps: preparing the hydroxypropyl chitosan by a hydroxypropylation reaction of chitosan at the temperature of 10-90 DEG C; preparing the oxidized sodium alginate by an oxidation reaction of sodium alginate at the temperature of 10-45 DEG C; respectively preparing aqueous solution of the hydroxypropyl chitosan and aqueous solution of the oxidized sodium alginate; adding the nano-silver solution and blending at certain ratio; allowing self-crosslinking of the components at the temperature of 10-50 DEG C to produce the antibacterial hydrogel material. The antibacterial hydrogel material has the advantages of low cost, environmental protection, simple process and the like; as the hydroxypropyl chitosan has good biocompatibility, the oxidized sodium alginate is nontoxic to human body, and the nano-silver has excellent antibacterial property, the obtained material can be applied to wound dressing, hemostatic materials and the like.
Owner:日照武汉理工大生物医药暨新材料研究院

Medical chitosan dressing and its application

The medical chitosan dressing is mixture of chitosan in 1 weight portion, Chinese medicine extract in 0.01-10 weight portions, chitosan derivative in 0.01-10 weight portions, and metal ion in 0.0001-0.05 weight portion. The Chinese medicine extract is bletilla tuber polysaccharide or natural indigo; and the chitosan derivative is one of hydroxypropyl chitin, hydroxypropyl chitosan, succinyl chitin, succinyl chitosan, carboxymethyl chitin and carboxymethyl chitosan. The medical chitosan dressing has the functions of promoting healing of the wound and stopping bleeding, inhibiting bacterial growth, and has excellent wound pasting performance.
Owner:青岛博益特生物材料股份有限公司

Sulfonated hydroxypropyl chitosan modified biocompatible polysulfone membrane and preparation method thereof

InactiveCN106943901AGood biocompatibilityTo achieve the purpose of anticoagulationSemi-permeable membranesPhase conversionSide chain
The invention relates to a sulfonated hydroxypropyl chitosan modified biocompatible polysulfone membrane and a preparation method thereof. The preparation method comprises the steps of chloromethylating polysulfone firstly so as to obtain chloromethylated polysulfone, and preparing a chloromethylated polysulfone membrane through a phase conversion method; using the chloromethylated polysulfone membrane as a base membrane and performing amination treatment on the chloromethylated polysulfone membrane, so as to obtain an aminated polysulfone membrane; and sulfonating chitosan so as to obtain sulfonated hydroxypropyl chitosan, and grafting a sulfonated hydroxypropyl chitosan hydrophilic side chain on the surface of the aminated polysulfone membrane through Schiff base reaction, so as to obtain the sulfonated hydroxypropyl chitosan modified biocompatible polysulfone membrane. The outstanding feature of the preparation method is to directly bond the sulfonated hydroxypropyl chitosan with a heparitin structure on the surface of the polysulfone membrane, so that the hydrophilicity, anticoagulation and anti-bacterial property are greatly enhanced. The preparation method is easy, the reaction conditions are mild and easy to control, and the preparation cost is low.
Owner:CENT SOUTH UNIV

Preparation process of chitosan oligosaccharide modifying cotton fiber

The invention relates to a preparation process of a chitosan oligosaccharide modifying cotton fiber, and relates to method and technology for modifying a cotton fiber by using chitosan oligosaccharide. The method comprises the following steps: firstly preparing a pretreated cotton fiber by taking the chitosan oligosaccharide and the cotton fiber as raw materials; then reacting epoxy chloropropane and the chitosan oligosaccharide to prepare hydroxypropyl chitosan oligosaccharide; then respectively carrying out etherifying modification on the pretreated cotton fiber by using the hydroxypropyl chitosan oligosaccharide and bis-glycidyl ether successively to prepare an etherate grafted with a hydroxypropyl chitosan oligosaccharide cotton fiber; and finally preparing a chitosan oligosaccharide modifying cotton fiber product through baking treatment. The preparation process disclosed by the invention has the characteristics of moderation in reaction condition, high specificity, simplicity for operation, low cost, convenience for popularization and application and the like. The product prepared by adopting the method has the advantages of antibacterial property and permanent dyeing property and can be widely applied to the fields of spinning, medicines, foods and the like.
Owner:CHONGQING UNIV

Haemostatic wound dressing

The invention discloses a haemostatic wound dressing and a preparation method thereof. The haemostatic wound dressing is prepared from the following raw materials in parts by weight: 15-35 parts of hydroxypropyl chitosan, 15-35 parts of chitosan, 10-20 parts of chitosan lactate, 5-12 parts of pectin, 3-12 parts of sodium carboxymethyl cellulose, 5-12 parts of alginate, 2-8 parts of an antibacterial agent, 2-8 parts of an antiphlogistic, 1-3 parts of Cu<2+> and 1-3 parts of Zn<2+>. The dressing disclosed by the invention is applicable to such aspects as performing rapid haemostasis, resisting bacterium, diminishing inflammation, inhibiting bacterium and promoting wound healing.
Owner:张亚丽

Polysaccharide artificial blood vessel and preparation method and application thereof

The invention relates to a polysaccharide artificial blood vessel and a preparation method and application thereof. The polysaccharide artificial blood vessel is characterized in that the compact artificial blood vessel is prepared from water-insoluble polysaccharide fibers and colloidal solution which are prepared from polysaccharide; the polysaccharide is one or two of carboxymethylcellulose, hydroxy propyl cellulose, hydroxyethylcellulose, hyaluronic acid, alginate, heparin, chondroitin sulfuric acid, chitin, carboxymethyl chitin, hydroxypropyl chitin, hydroxyethyl chitin, carboxymethyl hydroxypropyl chitin, carboxymethyl hydroxyethyl chitin, hydroxypropyl hydroxyethyl chitin, sulfonated chitin, chitosan, carboxymethyl chitosan, hydroxypropyl chitosan, hydroxyethyl chitosan, carboxymethyl hydroxyethyl chitosan, carboxymethyl hydroxypropyl chitosan, hydroxypropyl hydroxyethyl chitosan, sulfonated chitosan or succinyl chitosan. The polysaccharide artificial blood vessel has the high compactness, stretchability, bendability, mechanical strength and flexibility, can be implanted into bodies during the operation of trauma repair, and is used as artificial blood vessels to replace hurt vessels and improve blood-supply condition.
Owner:青岛博益特生物材料股份有限公司

Special slow release composite fertilizer for red jujubes and preparation method of special slow release composite fertilizer

The invention provides special slow release composite fertilizer for red jujubes. The special slow release composite fertilizer consists of the following raw material components in parts by weight: 40-50 parts of edible mushroom slag, 20-30 parts of saw dust, 20-30 parts of rice husks, 8-10 parts of bone powder, 50-60 parts of pig manure, 20-25 parts of vermiculite powder, 5-10 parts of sodium lignosulphonate, 18-20 parts of monoammonium phosphate, 20-30 parts of superphosphate, 10-15 parts of potassium chloride, 20-25 parts of urea, 1-2 parts of zinc sulfate, 1-2 parts of potassium borate, 2-3 parts of ferric sulfate, 0.2-0.4 part of manganese sulfate, 0.5-1.0 part of trichloroisocyanuric acid, 5-8 parts of PPGGE, 5-8 parts of crylic acid, 10-15 parts of polypropylene glycol, 0.1-0.4 part of ammonium persulphate, 4-6 parts of hydroxypropyl chitosan and 10-15 parts of a fertilizer additive. According to the special slow release composite fertilizer for the red jujubes, by the combination of organic and inorganic matters, the soil fertility is improved; by virtue of the added vermiculite powder, heavy metal ions in soil can be effectively absorbed, the yield is increased, and the red jujube quality is improved.
Owner:赵刚

Hydroxypropyl /carbon nanotube decoration electrochemical sensor and preparation method and application thereof

The invention discloses a hydroxypropyl / carbon nanotube decoration electrochemical sensor which mainly comprises a glassy carbon electrode, and the surface of the glassy carbon electrode is coated with a response film; the preparation method of the response film is as follows: a carbon nanotube and hydroxypropyl are added into acetic acid solution, and then homogeneous and light black hydroxypropyl / carbon nanotube compound dispersion liquid is prepared through an ultrasonic dispersion method; and the dispersion liquid is coated on the glassy carbon electrode, evaporated at room temperature to prepare the response film. The invention also discloses a preparation method of an electrochemical sensor and application of the electrochemical sensor in detecting zinc ions. The electrochemical sensor of the invention has simple and easy manufacturing method and low cost, and has high sensitivity in determining the zinc ions.
Owner:UNIV OF JINAN

Facial cleanser for effectively preventing haze hazards

The invention relates to the field of daily use chemicals and in particular relates to a facial cleanser for effectively preventing haze hazards. The facial cleanser comprises the following raw materials in parts by weight: 0.1-10 parts of chitosan and derivatives thereof, 5-25 parts of an amino acid-based surfactant and 0.2-3 parts of a thickening agent, wherein the chitosan and derivatives thereof are selected from one or more in chitosan, water-soluble chitosan, N-trimethyl chitosan, N-malely chitosan, carboxymethyl chitosan, hydroxypropyl chitosan or beta-cyclodextrin grafted chitosan; and the deacetylation degree of the chitosan and derivatives thereof is 60-99 percent. The chitosan and derivatives thereof are added into the amino acid-based facial cleanser, and the slightly acidic facial cleanser disclosed by the invention is rich in foam, high in stability, mild and non-irritating, has the effects of inhibiting bacteria and chelating heavy metals and is applied to skin care in hazy weather.
Owner:SHENZHEN AESTHETIC BIOLOGICAL TECH +1

Medical chitosan dressing

The invention discloses a medical chitosan dressing, and a preparation method thereof. The medical chitosan dressing is characterized in comprising following raw materials, by weight, 25 to 40 parts of chitosan, 15 to 25 parts of hydroxypropyl chitosan, 5 to 15 parts of sodium hyaluronate, 1 to 5 parts of an antibacterial agent, 2 to 8 parts of a calming anti-inflammatory agent, and 2 to 10 parts of a plasticizer. The medical chitosan dressing is suitable for medical hemostasis, antibiosis and antiphlogosis, and promoting of wound healing.
Owner:广州养和生物科技股份有限公司

Plant energy concentration fertilizer and preparation method thereof

The invention discloses a plant energy concentration fertilizer, which is characterized in that the fertilizer is formed by the following raw materials in parts by weight: 250-650 parts of compound amino acid concentrated solution, 100-120 parts of trace element, 0-100 parts of magnesium sulfate, 0-30 parts of agricultural rare earth, 0-300 parts of dicyandiamide, 2-10 parts of water-retaining agent, 100-300 parts of oligosaccharins or polysaccharide and 10-20 parts of hydroxypropyl chitosan. The preparation method is that compound amino acid concentrated solution and trace element are added into a reaction kettle according to the weight parts for chelation reaction when heating and agitation are conducted; and after the chelation reaction is over, the reaction solution is cooled to normal temperature, and then magnesium sulfate, agricultural rare earth, dicyandiamide, water-retaining agent, oligosaccharins or polysaccharide and hydroxypropyl chitosan are added into the reaction solution according to the weight parts, are agitated for 20-26 hours and are packaged to obtain the product. The plant energy concentration fertilizer prepared through the method has the advantages that the dosage is less, the utilization ratio is high, the foliage spray adhesive force is strong, the fertilizer contains no hormone, no toxicity, no harmfulness, no pollution and no residue are caused, and the growth of plants is effectively promoted.
Owner:苏州盛泽科技创业园发展有限公司

Preparation method and application of sensor for simultaneous detection of multiple aflatoxins

The present invention discloses a preparation method and application of a printing electrode electrochemical immunosensor for simultaneous detection of multiple aflatoxins, and belongs to technical fields of biological sensing, nano-functional materials and food safety analysis. The surface of a rectangular substrate coated with a polyester film is printed with seven electrodes, including five carbon working electrodes, a silver reference electrode and a counter electrode, and with seven electrode lead lines and electrode lead line ends. The present invention is characterized in that: a silver nanoparticles-nitrogen-doped graphene-hydroxypropyl chitosan conductive composite nanomaterial is used for fixing aflatoxin B1, aflatoxin B2, aflatoxin G1, aflatoxin G2, and total aflatoxin antibody to the surfaces of each working electrode, a detection liquid is dripped and coated on the working electrodes and the working electrodes are connected with a detection circuit of a multi-channel electrochemical workstation, thus the simultaneous detection of five aflatoxins are achieved. The sensor is simple in preparation, easy for processing, low in cost, and easy to carry. The detection method is simple, rapid, high in sensitivity and good in specificity.
Owner:UNIV OF JINAN

Biocompatible polyurethane modified by sulfonated hydroxypropyl chitosan and method for preparing biocompatible polyurethane

The invention discloses biocompatible polyurethane modified by sulfonated hydroxypropyl chitosan and a method for preparing the biocompatible polyurethane. The method includes synthesizing the sulfonated hydroxypropyl chitosan from chitosan by means of etherification reaction and sulfonation treatment, then adding diphenyl-methane-diisocyanate, polyethylene glycol and catalysts into a reactor and carrying out stirring reaction under the protection of nitrogen at the temperatures of 70-80 DEG C for 2-4 h; adding the sulfonated hydroxypropyl chitosan into reaction products and carrying out cooling reaction for 6-12 h to obtain the biocompatible polyurethane modified by the sulfonated hydroxypropyl chitosan. The biocompatible polyurethane and the method have the outstanding advantages that the sulfonated hydroxypropyl chitosan which is a water-soluble heparinoid substance is covalently grafted on polyurethane long chains, and accordingly the hydrophilicity and the anticoagulation properties of polyurethane can be greatly improved; processes are simple, reaction conditions are mild and are easy to control, and raw materials are easily available and are low in cost.
Owner:CENT SOUTH UNIV

O-hydroxypropyl chitosan and preparation method thereof

Provided are O-hydroxypropyl chitosan and a preparation method thereof, wherein the preparation method comprises the steps: adding chitosan to a sodium hydroxide solution, alkalizing, then adding intoisopropanol, stirring evenly, heating up to 40-80 DEG C, then adding a tetramethylammonium hydroxide solution and epoxypropane, continuing to carry out reaction for 3-8 h, allowing to stand, pouringto remove an upper-layer supernatant, adjusting the pH value to 6.5-7.5, then adding a mixed solution of acetone and ethanol, carrying out suction filtration to obtain a filter cake, carrying out Soxhlet extraction, and drying to obtain O-hydroxypropyl chitosan. O-hydroxypropyl chitosan is prepared by a nucleophilic substitution reaction of chitosan and epoxypropane. -OH of a C6 site of chitosan is activated by alkalization of sodium hydroxide, the modification position is clear, the purity is high, the post treatment is simple, and the product has good flocculation performance.
Owner:SHAANXI UNIV OF SCI & TECH

Method for preparing hydrogel film for curing chemotherapeutic phlebitis

The invention belongs to the technical field of biomedical materials and specifically relates to a method for preparing a hydrogel film for curing chemotherapeutic phlebitis. The method includes introducing an azide group (4-azidobenzoic acid) with optical reaction activity onto an amino group of water-soluble hydroxypropyl chitosan to prepare light cross-linked azide hydroxypropyl chitosan, and subjecting an azide hydroxypropyl chitosan aqueous solution to irradiation and crosslinking by an ultraviolet lamp to obtain the chitosan hydrogel film with bioadhesion. According to the chitosan hydrogel film, general characteristics of blood stopping, pain relieving, bacterium inhibiting, anti-inflammation and antioxidation of chitosan are achieved, advantages of good biocompatibility, good moisture retention, good water vapor permeability and high adhesion strength of hydrogel materials are achieved, and the chitosan hydrogel film is convenient to use, good in comfort degrees and good in effect of preventing and curing the chemotherapeutic phlebitis.
Owner:JIANGNAN UNIV

Application of hydroxypropyl chitosan/carbon nanotube modified electrochemical sensor

The invention relates to a sensor and an application thereof, and concretely relates to a hydroxypropyl chitosan / carbon nanotube modified electrochemical sensor and an application thereof. The electrochemical sensor which is obtained by treating a glassy carbon electrode as a working electrode and coating the surface of the glassy carbon electrode with a hydroxypropyl chitosan / carbon nanotube response film can be used to detect the content of Pb ions in wastewater. The working electrode of the electrochemical sensor of the present invention has the advantages of simple and easily implemented manufacturing method, low cost, and high sensitivity when the working electrode is used to detect the Pb ions.
Owner:INST OF OCEANOLOGY - CHINESE ACAD OF SCI

Chitosan carbon steel restrainer and use thereof

The invention relates to a chitosan carbon steel restrainer, which comprises components that are more than one selected from hydroxypropyl chitosan and carboxymethyl chitosan. The use of chitosan carbon steel restrainer is that the restrainer can be added into cleaning solution to clean steel by immersion. The cleaning solution is acid liquor, the addition amount of the restrainer in the acid liquor is 0.001 to 3.0 g / L, and the immersion is performed at room temperature for 0.5 to 4 hours. The product of the invention is used for surface cleaning of carbon steel and carbon steel product and the method can prevent over metal etching and excessive acid liquor consumption during cleaning and has the outstanding advantages of low price, low dosage, high efficiency and high continuous acting force.
Owner:UNIV OF JINAN

Chitosan modified derivative corrosion inhibitor and preparation method thereof

The invention belongs to the field of metal corrosion and protection and particularly relates to a chitosan modified derivative corrosion inhibitor and a preparation method thereof. Application of the modified derivative to other fields such as the biological field and the medicine field is not subjected to related verification or illustration. The chitosan modified derivative corrosion inhibitor is carboxymethylation hydroxypropyl chitosan, that is, chitosan is modified through carboxymethylation and hydroxypropylation, a carboxymethyl group and a hydroxypropyl group are introduced, and the chitosan derivative with multiple substituent groups is obtained. The environment-friendly chitosan modified derivative corrosion inhibitor and the preparation method thereof are applicable to a corrosive medium, the production process is simple, the raw material source is wide, and the chitosan modified derivative has good water solubility and biocompatibility.
Owner:INST OF OCEANOLOGY - CHINESE ACAD OF SCI

Medical chitosan dressing and its application

The medical chitosan dressing is mixture of chitosan in 1 weight portion, Chinese medicine extract in 0.01-10 weight portions, chitosan derivative in 0.01-10 weight portions, and metal ion in 0.0001-0.05 weight portion. The Chinese medicine extract is bletilla tuber polysaccharide or natural indigo; and the chitosan derivative is one of hydroxypropyl chitin, hydroxypropyl chitosan, succinyl chitin, succinyl chitosan, carboxymethyl chitin and carboxymethyl chitosan. The medical chitosan dressing has the functions of promoting healing of the wound and stopping bleeding, inhibiting bacterial growth, and has excellent wound pasting performance.
Owner:青岛博益特生物材料股份有限公司

Preparation method of water-soluble 2'-hydroxylpropylchitosan

The invention discloses a preparation method of water-soluble 2'-hydroxylpropylchitosan which is prepared by using an isopropanol solution as a reaction system and epihydric alcohol as an etherifying agent through alkalizing, etherifying, neutralizing and purifying chitosan. The optimal reaction conditions are as follows: the amount of the chitosan is 2g, NaOH accounts for 30-40 percent, the amount of the epihydric alcohol is 15mL, the temperature is 60 DEG C and the reaction time is 10h. The color of the water-soluble 2'-hydroxylpropylchitosan obtained by adopting the method disclosed in the invention is white or light yellow, and the solubility is 6-12g / 100mL of H2O. The invention has the advantages of ensuring that the reacted chitosan product is grafted with more hydrophilic hydroxyl groups by using the epihydric alcohol as the etherifying agent, and ensuring that the whole chitosan derivative has stronger hydrophily. The epihydric alcohol as a reactant has better hydrophily compared with the traditional oxacyclopropane and epoxypropane to ensure that a catalyst needs not to be added and excessive unreacted epihydric alcohol is easy to remove through a simple dialysis method.
Owner:BIOCHEM ENG COLLEGE OF BEIJING UNION UNIV

Method for preparing hydroxypropyl chitose nano particle

The present invention relates to a hydroxypropyl chitosan nanometer particle and the preparation method for the hydroxypropyl chitosan nanometer particle. The nanometer particle is obtained through ion gel method, including: chitosan, sodium hydroxidand and isopropyl alcohol are mixed for stirring at room temperature; excessive propylene oxide is added in to the mixture for sufficient reaction at 60 DEG C; After the reaction, the Ph value is adjusted to be neutral; the reaction product is deposited by acetone and is cleaned for several times; then the product is dried in vacuum to get hydroxypropyl chitosan; with constant magnetic-force stirring, the water solution of hydroxypropyl chitosan is slowly added with sodium polyphosphate solution; when the solution is of opalescence, hydroxypropyl chitosan nanometer particles are obtained. The diameter of the hydroxypropyl chitosan nanometer particles obtained by the present invention can be controlled. The hydroxypropyl chitosan nanometer particles can be biologically degraded with in a non-toxic and harmless way. The preparation method is moderate. The hydroxypropyl chitosan nanometer particles can be used as the carriers of protein drugs.
Owner:STATE GRID CORP OF CHINA +1

Polysaccharide hemostatic dressing as well as preparation method and application thereof

The invention discloses a polysaccharide hemostatic dressing as well as a preparation method and an application thereof. The polysaccharide hemostatic dressing is membrane or sponge-like product prepared by carrying out a cross-linking reaction on aminopolysaccharides and oxidized polysaccharides, wherein the aminopolysaccharides refer to one or more of hyaluronic acid, chondroitin sulfate, heparin, chitosan, hydroxyethyl chitosan, hydroxypropyl chitosan, sulfonated chitosan, hydroxybutyl chitosan, carboxymethyl chitosan, succinyl chitosan or other chitosan derivatives; the oxidized polysaccharides refer to one or more of oxidized polysaccharides containing dialdehyde groups; and saccharide units containing the dialdehyde groups account for 1-70% of total saccharide units of the polysaccharide molecule. The polysaccharide hemostatic dressing disclosed by the invention has an obvious hemostasis effect, is capable of obviously shortening the hemostasis time of the wound surface, is non-toxic, and has excellent biocompatibility. The polysaccharide hemostatic dressing can be used for preparing medical apparatuses and instruments for traumatic hemostasis and surgical hemostasis, servesas hemostatic dressing medical apparatuses and instruments to be developed, and has wide market prospects.
Owner:OCEAN UNIV OF CHINA

Method of treating onychomycosis

The present invention is directed to a nail lacquer consisting essentially of terbinafine as an antimycotic agent, hydroxypropyl chitosan as film forming agent, water and a lower alkanol as solvents. The invention is also directed to a method for treating onychomycosis by topically administering such a nail lacquer to a patient in need of such a treatment.
Owner:POLICHEM SA

Hydrogel repair mask and preparation method thereof

The invention discloses hydrogel repair mask, belonging to the technical field of skin care products. The hydrogel repair mask is transparent gel mask; the gel mask is prepared from the following components in parts by weight: 0.5-2 parts of carrageenan, 0.5-2 parts of konjac gum, 0.3-0.8 part of chitosan, 1-2 parts of cross-linking accelerator, 10-15 parts of solubilizing and moisturizing agent and 60-80 parts of pure water, wherein the chitosan is selected from one or two of carboxymethyl chitosan, hydroxypropyl chitosan and chitosan quaternary ammonium salt; the cross-linking accelerator isselected from one or two of potassium chloride, calcium chloride and potassium dihydrogen phosphate; the solubilizing and moisturizing agent is selected from one or two of glycerol, propylene glycoland butylene glycol. The invention also discloses a preparation method of the hydrogel repair mask. The hydrogel repair mask has good ductility, toughness and adhesion property, and can be used for wound repair.
Owner:南昌辉正生物技术有限公司

Dehydroabietyl glycidyl ether grafted water-soluble hydroxypropyl chitosan and preparation method thereof

The invention discloses dehydroabietyl glycidyl ether grafted water-soluble hydroxypropyl chitosan and a preparation method thereof. The compound is a compound with a structure as shown in general formula (I), the preparation method comprises two main processes, namely preparation of water-soluble hydroxypropyl chitosan and preparation of dehydroabietic glycidyl ether grafted water-soluble hydroxypropyl chitosan; the non-ionic surfactant dehydroabietyl glycidyl ether grafted water-soluble hydroxypropyl chitosanbased on natural renewable rosin and chitosan as raw materials is obtained. The preparation method comprises the following steps: alkalizing chitosan, and reacting the alkalized chitosan with epoxypropane to generate hydroxypropyl chitosan; hydrolyzing the generated hydroxypropyl chitosan under the assistance of ultrasonic waves to obtain the water-soluble hydroxypropyl chitosan of which the water solubility is remarkably improved and the molecular weight is reduced; reacting thewater-soluble hydroxypropyl chitosan with dehydroabietyl glycidyl ether; finally, generating the novel nonionic surfactant dehydroabietic glycidyl ether grafted water-soluble hydroxypropyl chitosan with the average grafting degree of (2-hydroxy-3-dehydroabietic oxy) propyl on a glucosamine unit reaching 5 to 100% and the average grafting degree of hydroxypropyl reaching 50 to 300%.
Owner:YANCHENG INST OF TECH

Acid dye leveling agent

The invention discloses an acid dye leveling agent. The acid dye leveling agent contains the ingredients in percentage by mass: 5-20% of N-fat acylated-O-hydroxypropyl chitosan, 10-25% of N-fat acylated chitosan oligosaccharide, 5-15% of nonionic surfactant cardanol polyoxyethylene ether and the balance of water. According to the acid dye leveling agent, a compounding technology is adopted, so that the leveling effect of the product is optimized, the application effect reaches the effect of the conventional leveling agents prepared from petroleum-based surfactants, and the acid dye leveling agent can replace petroleum-based products.
Owner:江苏正大易方科技有限公司

Composite adsorption material for treatment of industrial waste water and preparation method thereof

The invention relates to a composite adsorption material for treatment of industrial waste water and a preparation method thereof. The composite adsorption material is characterized by comprising 5 to 15 parts of polyaluminum silicate sulfate, 3 to 10 parts of polyaluminum chloride, 4 to 8 parts of macroporous adsorption resin D1300, 4 to 9 parts of macroporous adsorption resin H103, 3 to 8 parts of polyethelene alcohol fiber, 2 to 5 parts of Arabic gum, 4 to 9 parts of hydroxypropyl chitosan, 3 to 7 parts of barium sulfate and 4 to 7 parts of lithium carbonate. The preparation method comprises the following steps: step 1, crushing barium carbonate and lithium carbonate with a crusher until the particle size of both barium carbonate and lithium carbonate is 150 to 300 meshes; and step 2, respectively weighing the above-mentioned components according to weight parts and uniformly mixing the components to prepare the composite adsorption material for treatment of industrial waste water.
Owner:苏州凯欧曼新材料科技有限公司

Antibacterial self-cleaning ceramic coating and preparation method of same

The invention discloses an antibacterial self-cleaning ceramic coating and a preparation method of same. The ceramic coating is mainly prepared from ceramic micro-powder, magnetic wave stone powder, cement, waste stainless steel powder, porous powdery quartz, nano titanium dioxide, nano montmorillonite, hydrophobic fumed silica, hydroxypropyl chitosan, (heptadecafluoro-1,1,2,2-tetradecyl)trimethoxysilane, etc. The ceramic coating is prepared by matching nano titanium dioxide and nano montmorillonite, wherein the special structure of the nano montmorillonite has adsorption effect on bacteria, and the nano titanium dioxide has strong killing effects on the bacteria due to photocatalysis. The two components are matched with each other to achieve strong antibacterial capability. Meanwhile, the added magnetic wave stone powder, algae carbon and the like can significantly improve the antibacterial performance of the coating; in addition, by addition of the nano titanium dioxide, the (heptadecafluoro-1,1,2,2-tetradecyl)trimethoxysilane, the nano titanium phosphate and the like, the coating has excellent self-cleaning performance; by addition of the waste stainless steel powder, the aluminum dihydrogen tripolyphosphate and the like, the ceramic coating is improved in anti-wear performance and high-temperature stability.
Owner:佛山市东方智柏纳米材料科技有限公司
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