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39results about How to "High amino content" patented technology
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Polyamido-amine dendrimers -modified macroporous crosslinked chitosan microsphere and preparation method thereof
InactiveCN101817932AImprove adsorption capacityHigh amino contentOrganic active ingredientsOther chemical processesDendrimerCrosslinked chitosan
The invention relates to a polyamido-amine dendrimers-modified macroporous crosslinked chitosan microsphere and a preparation method thereof, specifically a low-generation (Generation is not more than 3) polyamide-amine (Poluamidoamine, short for PAMAM) dendrimers (Dendrimers)-modified macroporous crosslinked chitosan microsphere and a preparation method thereof. The macroporous crosslinked chitosan microsphere is prepared by means of inverse suspension reaction by using chitosan as raw material, sucrose as pore forming agent, glutaric dialdehyde as crosslinking agent, and is then chemically modified by using low-generation (generation is not more than 3) polyamide-amine dendrimer as amination agent. The microsphere has the average particle diameter of 100 to 170 microns. The modified macroporous crosslinked chitosan microspheres CS-G0, CS-G1.0, CS-G2.0 and CS-G3.0 respectively have the content of amino: 4.63, 5.30, 5.41 and 4.84mmol / g. The microsphere has the advantages of: simple steps of the material preparation method thereof, increased amino content after the modification thereof, and higher adsorption performance than unmodified chitosan microspheres when being used for the adsorption of bilirubin in aqueous solution.
Owner:NANKAI UNIV +1
Preparation method of industrial aminated graphene
ActiveCN108373149AReduce dosageLittle damage to the lamellar structureGrapheneBulk chemical productionCvd grapheneDiamine
The invention discloses a preparation method of industrial aminated graphene. The preparation method of the industrial aminated graphene belongs to the technical field of graphene preparation, and comprises the steps of firstly stripping graphite through a mechanical stripping method, oxidizing through adjusting the matching ratio of a main oxidizing agent and an auxiliary oxidizing agent, then activating hydroxyl and carboxyl on the surface of graphene oxide through a chlorinating agent, and finally selecting appropriate diamine for carrying out amination reaction. According to the preparation method of the industrial aminated graphene provided by the invention, through adopting a stripping manner at first, the dosage of the oxidizing agents can be reduced, an ideal effect is achieved atthe same time, and the problem of poor modification effect caused by high oxygen content and severe destructiveness on a graphene slice layer due to large dosage of the oxidizing agents is solved.
Owner:CHANGZHOU HIGHBERY NEW NANO MATERIALS TECH CO LTD +1
Method I for preparing amino-modified attapulgite adsorbent and method II for removing hexavalent chromium from water
InactiveCN104226263AChemically stableEasy to operateOther chemical processesWater/sewage treatment by sorptionSilane couplingChemistry
Owner:安徽鑫山新材料科技有限公司
Formaldehyde catching agent and preparation method thereof
ActiveCN107185405AImprove removal efficiencyFast removal efficiencyDispersed particle separationHydroxylamineHydroxylamine Hydrochloride
The invention discloses a formaldehyde catching agent and a preparation method thereof. The formaldehyde catching agent comprises, by weight, 20-80 parts of acrylic acid, 20-80 parts of polymeric monomers, 20-80 parts of amino acid, 50-100 parts of hydroxylamine, 5-30 parts of ethyl alcohol, 3-30 parts of urea, 3-30 parts of carbohydrates, 1-10 parts of initiating agents, 1-40 parts of dispersing agents, 5-70 parts of additives, 3-30 parts of acidity regulators, 10-50 parts of sodium citrate and 3000-5000 parts of deionized water. The prepared formaldehyde catching agent can efficiently and rapidly remove formaldehyde and is low in cost and simple in preparation method, raw materials of the catching agent are free from toxicity and damage, secondary pollution is avoided, and mass production is facilitated.
Owner:江苏宁而净环保科技有限公司
Composite photocatalyst, preparation method and application thereof
InactiveCN108940249AResponsiveGood catalytic degradation effectPhysical/chemical process catalystsWater/sewage treatment by irradiationDispersitySpherical shaped
The invention discloses a composite photocatalyst, a preparation method and an application thereof. The composite photocatalyst comprises hollow glass beads, and graphene and TiO2 supported on the surface of the hollow glass beads. The method comprises the following steps: firstly pretreating the hollow glass beads, and loading the surface of the pretreated hollow glass beads with a graphene oxidelayer to form a graphene oxide / hollow glass bead composite material; placing the bead composite material into a TiO2 precursor, and reacting at appropriate pressure, at appropriate stirring speed andat 100-200 DEG C for 4-12 h so as to obtain the composite photocatalyst. In comparison with traditional TiO2 loaded hollow glass beads, the composite photocatalyst has good response to visible light,higher utilization rate of sunlight, and has a better effect of catalyzing pollutants. The composite photocatalyst of the invention has the characteristics of easy recovery and good dispersity. The composite photocatalyst has a regular spherical shape and good fluidity such that the composite photocatalyst is extremely easy to disperse in a matrix during application.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
Preparing method for starch-modified heavy metal trapping agent
ActiveCN105924534AEasy to separateHigh amino contentOther chemical processesWater contaminantsCross-linkTrapping
The invention discloses a starch-modified heavy metal trapping agent and a preparing method thereof. The preparing method comprises the steps that firstly, starch is taken and subjected to a cross-linking reaction with a cross-linking agent under the action of a catalyst, and cross-linked starch is obtained; secondly, the cross-linked starch and an etherifying agent are subjected to an etherification reaction under the action of an initiator, and cross-linked etherified starch is obtained; thirdly, in an alkaline environment of a sodium carbonate aqueous solution, the cross-linked etherified starch and an aminating agent are subjected to an amination reaction, and the obtained cross-linked amino starch is the starch-modified heavy metal trapping agent, wherein the content of amino in the modified starch is 1.2-1.8%. Compared with the prior art, the sodium carbonate aqueous solution is used for providing the alkaline environment in the amination reaction, the content of amino of the modified starch can be increased through the preparing method, the starch-modified heavy metal trapping agent has the advantage of being high in copper removing rate, and a chelate formed by the starch-modified heavy metal trapping agent and heavy metal ions is insoluble in water, and can be easily separated from a solution.
Owner:JIAXING UNIV
Silicon dioxide nanoparticles grafted with organic functional molecules as well as preparation method and application thereof
ActiveCN111040471AReduce migration volatilizationImprove extraction resistancePigment treatment with non-polymer organic compoundsSilica nanoparticlesCarboxylic group
The invention belongs to the field of silicon dioxide modified with organic functional molecules, relates to silicon dioxide nanoparticles grafted with organic functional molecules as well as a preparation method and application thereof, and particularly relates to silicon dioxide nanoparticles grafted with a hindered phenol antioxidant with carboxyl and a preparation method thereof. The silicon dioxide nanoparticles grafted with organic functional molecules are obtained by grafting organic functional molecules such as the hindered phenol antioxidant to the surfaces of silicon dioxide nanoparticles through chemical bonds; the migration and volatilization of the organic functional molecules such as the hindered phenol antioxidant can be reduced, and the extraction resistance of the antioxidant is improved, so that the long-term ageing resistance of the antioxidant is improved. After the nanoparticles are grafted and modified by organic functional molecules such as hindered phenol antioxidants, the compatibility and dispersity of the nanoparticles in a polymer matrix can be effectively improved, and the comprehensive mechanical properties of the polymer material are improved.
Owner:INST OF CHEM CHINESE ACAD OF SCI
Preparation method of composite silicon dioxide aerogel capable of adsorbing formaldehyde
InactiveCN109225150AStir wellIncreased specificity of adsorptionGas treatmentOther chemical processesDesorptionSilicon dioxide
The invention discloses a preparation method of composite silicon dioxide aerogel capable of adsorbing formaldehyde and belongs to the field of aerogel application. The existing porous adsorption material similar to activated carbon has no specificity for adsorption of formaldehyde and has poor stability, thereby being easy to cause automatic desorption and re-release of formaldehyde after adsorption. Therefore, the invention adopts a sol-gel method which is characterized in that under the condition of room temperature, chitosan serving as a raw material is subjected to nano-scale combinationwith silicon dioxide; in the reaction process, the opening of a conical flask is tightly sealed by a sealing membrane to obtain a sealed reaction condition, thereby being favorable for reacting; and further, acidification and amination modification are performed. The obtained modified gel has higher amino content, contains active groups such as alkyl, hydroxyl and amino of chitosan, and has greatly enhanced specificity for adsorption of formaldehyde. Furthermore, the adsorption material is environment-friendly, can not cause secondary pollution, has good stability, and has no phenomena of automatic desorption and re-release of formaldehyde.
Owner:YANTAI ENG & TECH COLLEGE YANTAI TECHNICIAN INST
Polyether polyamine, preparation method of polyether polyamine, polyether polyamine block silicone oil and preparation method of polyether polyamine block silicone oil
The invention discloses polyether polyamine which is characterized by having a following general formula: H2NC3H6(OC3H6)a(OC2H4)b(OC3H6)aNHCH2CH(OH)CH2(OC2H4)cOCH2CH(OH)CH2NHC3H6(OC3H6)dNH2, wherein the a, b, c and d are all integers from 2-40. The polyether polyamine provided by the invention contains amino groups at chain ends, has amino groups in the chain middle part, and has the improved content of the amino groups in comparison with that of the amino groups of the conventional polyether polyamine, and the flexibility of polyether polyamine block silicone oil prepared by using the polyether polyamine as one of raw materials is greatly improved.
Owner:上海硅普化学品有限公司
Preparation method of graphene
ActiveCN108793134AReduce dosageImprove performanceGrapheneBulk chemical productionFiltrationReaction temperature
The invention discloses a preparation method of graphene. The preparation method of the graphene comprises the following steps: 1, stripping graphite by a supercritical carbon dioxide stripping method, dispersing the obtained graphite powder into deionized water, crushing by a homogenizer, controlling the pressure to 90 to 150 MPa, and sequentially dispersing and drying; and 2, soaking and washingthe dry product in the step 1 with diluted hydrochloric acid, wherein the soaking temperature is -10 to 15 DEG C, the soaking time is 1 to 4 hours, and the mass ratio of the diluted hydrochloric acidto the graphite is (1-2.5):1, adding a compound of potassium dichromate and hydroperoxide, performing oxidation reaction at the reaction temperature of 10 to 85 DEG C for 2.5 to 6 hours, and sequentially performing water washing, suction filtration and drying after reaction to obtain graphene oxide powder. An aminated graphene sheet obtained by the preparation method of the graphene has small diameter and small layer number, is favorable for being dispersed in a base material when a macromolecular material is modified, avoids aggregation and can achieve a good modification effect under the condition of small adding amount.
Owner:中山市悦泰汽车零部件有限公司
Blocked quaternary ammonium group modified polysiloxane and preparation method thereof
Blocked quaternary ammonium group modified polysiloxane and a preparation method thereof are disclosed. Tertiary-amino-terminated silicon-containing polyether is synthesized; according to a similar compatibility principle, under the condition of no solvent, amino of the tertiary-amino-terminated polyether and epoxy of epoxy-terminated silicone oil can undergo homogeneous ring-opening addition, andtherefore, the synthesis technology of solvent-free (AB)n type or (ABA)n block copolymerization modified silicone oil is achieved, and introduction of siloxane into the molecular structure of the tertiary-amino-terminated polyether makes two chain ends of the chain contain amino, the amino content is obviously increased than that of existing ordinary tertiary amines, and a freely rotating silicon-oxygen bond (Si-O) is obtained. Softness of blocked quaternary ammonium group modified polysiloxane (commonly known as block silicone oil) prepared by using the tertiary-amino-terminated silicon-containing polyether as an intermediate is greatly improved.
Owner:HANGZHOU TRANSFAR FINE CHEM CO LTD +2
Branching polyamino chitosan derivative and preparation method thereof
The invention relates to a branching polyamino chitosan derivative and a preparation method thereof. Hydrogen bond action of amino and hydroxy in chitosan molecules causes poor swelling resistance property and poor dissolubility of the chitosan, and the chitosan is only dissolved in a special organic solvent, thus the application of the chitosan is limited. The preparation method comprises the steps of: dissolving chitosan in an organic acid solution, dissolving acrylate in lower alcohol, mixing the acrylate and the lower alcohol and adding a proper of tertiary amine, stirring for reacting for a certain time, regulating the pH, evaporating for removing water, separating out solids with alcohol or acetone, leaching, washing for several times, and drying in vacuum to obtain N-carboxyethyl chitosan ester; adding the N-carboxyethyl chitosan ester and polyamine in a flask, adding the alcohol and stirring for reacting, leaching, and washing for several times to obtain first-generation branching polyamino chitosan; and repeating the reaction to generate over two generation super-branching chitosan. According to the invention, acetyl and the polyamine are introduced in the chitosan amino, the hydrogen bond of the chitosan is broken so that the derivative has water-solubility, the amino content on the chitosan is effectively increased, and the application range of the chitosan is widened.
Owner:SHAANXI UNIV OF SCI & TECH
Zinc-rich anticorrosion coating
InactiveCN108192470AGood continuityAvoid Galvanic CorrosionAnti-corrosive paintsEpoxy resin coatingsTetrabromobisphenol AAniline
The invention discloses a zinc-rich anticorrosion coating. The zinc-rich anticorrosion coating is mainly prepared from a mixture of a component A and a component B in a mass ratio being (3.5-6):1, wherein the component A comprises the following raw materials in parts by mass: 100 parts of inorganic nano-zinc powder, 45-75 parts of bisphenol S epoxy resin, 20-35 parts of fumed silica, 10-25 parts of phenolic epoxy resin, 15-20 parts of hydrogenated bisphenol A epoxy resin, 5-10 parts of tetrabromobisphenol A resin, 6-15 parts of diglycidyl ortho-phthalate and 0.5-1.5 parts of a leveling agent;the component B comprises the following raw materials in parts by mass: 50-65 parts of aminohydrocarbyl silicone oil, 15-25 parts of polyaniline, 5-10 parts of graphene nanoplatelets, 5-8 parts of boron-containing polysilane, 1-3 parts of a defoaming agent and 3-5 parts of a wetting and dispersing agent. The coating has the following beneficial effects: (1) electrical conductivity of polymers in the coating is enhanced; (2) corrosion resistance is excellent; (3) physical properties of the coating are good.
Owner:YIWU INDAL & COMMERICAL COLLEGE
Rice bran vegetable protein formaldehyde remover and preparing method thereof
ActiveCN108159624AEasy to useHigh amino contentWater contaminantsDispersed particle separationSolubilitySal ammoniac
The invention belongs to the biotechnology field, and particularly discloses a rice bran vegetable protein formaldehyde remover. According to the rice bran vegetable protein formaldehyde remover, ammonium hydroxide-bromelain can be adopted for hydrolyzing rice bran proteins to obtain rice bran vegetable protein liquid, and the rice bran vegetable protein liquid is used as a formaldehyde removing active ingredient to prepare the novel rice bran vegetable protein formaldehyde remover. The prepared novel formaldehyde remover is stable in physicochemical property, environment-friendly, free of pollution, good in water solubility, convenient to use and high in formaldehyde removing rate.
Owner:广州宝力环保科技有限公司
Preparation of Amino-modified Attapulgite Adsorbent and Method for Removing Hexavalent Chromium from Water
InactiveCN104226263BChemically stableHigh amino contentOther chemical processesWater/sewage treatment by sorptionSorbentGraft reaction
Owner:安徽鑫山新材料科技有限公司
Gelatin-based biomedical adhesive and preparation method thereof
The invention discloses a gelatin-based biomedical adhesive and a preparation method thereof.The preparation method comprises the following steps that gelatin is dissolved in a phosphate solution, an organic amine compound is added, the pH value of a system is adjusted, then a carboxyl activating agent is added, and aminated gelatin is obtained after the reaction is completed; the preparation method comprises the following steps: dissolving hyaluronic acid in ultrapure water, uniformly stirring, adding an aqueous solution of an oxidizing agent at room temperature under a dark condition, carrying out an oxidation reaction, and adding a terminating agent to terminate the reaction, so as to obtain formylated hyaluronic acid; and mixing the phosphate buffer salt solution in which aminated gelatin is dissolved with the phosphate buffer salt solution in which aldehyde hyaluronic acid is dissolved, adding tannic acid into the mixed solution, and uniformly stirring to obtain the gelatin-based biomedical adhesive. The preparation method is mild in reaction condition and simple to operate. The prepared adhesive has the characteristics of high bonding speed, high bonding strength, good biocompatibility, biodegradability, good anti-inflammatory property, good anti-oxidation property and good antibacterial property.
Owner:SHAANXI UNIV OF SCI & TECH +1
Preparation method of chitosan oligosaccharide grafted cellulose fiber
ActiveCN109112830AHigh amino contentReact SafeBiochemical fibre treatmentVegetal fibresPotassium persulfateSulfonate
The invention relates to a preparation method of chitosan oligosaccharide grafted cellulose fiber. The preparation method comprises following steps: A, preparation of sodium methallyl sulfonate-chitosan, wherein chitosan oligosaccharide is added into hot water to prepare a chitosan oligosaccharide aqueous solution, the chitosan oligosaccharide aqueous solution is cooled to room temperature, sodiummethallyl sulfonate is added into the chitosan oligosaccharide aqueous solution, an obtained mixture is subjected to stirring and heating, and potassium persulfate is added so as to obtain the sodiummethallyl sulfonate-chitosan oligosaccharide solution; B, cellulose fiber pretreatment, wherein cellulose fiber and soft water are introduced into a pretreatment tank, heating, stirring, water discharging, dehydration, and drying are carried out so as to obtain pretreated cellulose fiber; and C, preparation of chitosan oligosaccharide grafted cellulose fiber, wherein the cellulose fiber obtainedin step B is introduced into a reaction vessel, the sodium methallyl sulfonate-chitosan oligosaccharide solution obtained in step A is added, water is added, and stirring, heating, and centrifugal dewatering are carried out so as to obtain the chitosan oligosaccharide grafted cellulose fiber.
Owner:HMEI THREAD CO LTD OF YINBIN SICHUAN
Adsorbent resin and synthetic method thereof and method for treating wastewater
ActiveCN111072875AEfficient removalRemove completelyOther chemical processesWater/sewage treatment by sorptionPolymeric adsorbentOrganic matter
The invention provides aldehyde adsorption resin and a preparation method and application thereof. Amino groups of the resin are rich in amino and hydrazino polar groups, the content of the amino groups is 10-20 times that of common modified macroporous resin, the amino groups and the hydrazino groups play a synergistic effect, a better removal effect on aldehydes is achieved, acid / alkali regeneration is easy, and the performance is stable. After the wastewater passes through the azeotropic tower and the stripping tower and is adsorbed by resin, an aqueous solution of which the COD is less than 1000mg / L and the total aldehyde is less than 500mg / L is obtained and can be subjected to biochemical treatment. According to the method, the wastewater treatment cost is effectively reduced, or organic matters in the wastewater are recycled, the waste gas emission is reduced, and economic and environment-friendly values are realized.
Owner:WANHUA CHEM GRP CO LTD
A kind of preparation method and obtained product of hydrophilic aminated hydrogenated nitrile rubber
The invention provides a preparation method for hydrophilic aminated hydrogenated butadiene-acrylonitrile rubber. The method comprises the steps that 1, a nanometer Rh metal catalyst and butadiene-acrylonitrile rubber are mixed and dispersed evenly; 2, mixed liquid obtained in the step 1 is added in a reaction kettle, and first-step catalytic hydrogenation is performed under the hydrogen pressure of 1-5 MPa; 3, a RhCl(PPh3)3 catalyst with the mass fraction of 0.5-2.0% is added in a catalytic hydrogenation reaction product, and reacting is performed for 1-3 h under the hydrogen pressure of 1-5 MPa. The invention further provides the hydrophilic aminated hydrogenated butadiene-acrylonitrile rubber prepared through the preparation method. The prepared aminated hydrogenated butadiene-acrylonitrile rubber has the good hydrophilicity, and the hydrophilicity of the aminated hydrogenated butadiene-acrylonitrile rubber is improved along with increasing of the amino group content; existence of amino groups in the aminated hydrogenated butadiene-acrylonitrile rubber supplies active sites to introduction of organic matter containing carboxyl groups and epoxy groups.
Owner:BEIJING UNIV OF CHEM TECH
High-strength polyolefin composite pipe and preparation method thereof
ActiveCN113524745AHigh tensile strengthImprove heat resistanceGeneral water supply conservationRigid pipesPolymer sciencePolyolefin
The invention discloses a high-strength polyolefin composite pipe and a preparation method thereof. According to the high-strength polyolefin composite pipe, polybutylene serves as an inner pipe, the outer surface of the inner pipe is coated with an oxygen barrier layer, the oxygen barrier layer is an EVOH oxygen barrier layer, the outer surface of a flame-retardant layer is coated with a polyethylene outer pipe, hot melt adhesive is arranged between every two layers, and the layers are compounded through the hot melt adhesive to form the composite pipe. In order to improve the strength of the polyethylene composite pipe, polydopamine coated particles are introduced into the polyethylene outer pipe, and chrysotile has excellent mechanical properties such as good thermal stability and high tensile strength, so that the polydopamine coated particles are doped into polyethylene to improve the heat resistance and strength of the polyethylene; and the process is reasonable in design and simple to operate, and the prepared polyolefin composite pipe has excellent mechanical property and heat resistance, can be widely applied to the technical field of heating pipes and the like, and has relatively high practicability.
Owner:JINSU ENTERPRISE GRP SHANGHAI
A kind of plant extract combined dressing based on ginseng extract and preparation method thereof
ActiveCN113456878BLow antigenicityNon-irritatingAbsorbent padsBandagesBiotechnologyPolyethylene oxide
The invention discloses a plant extract combined dressing based on ginseng extract and a preparation method thereof. During preparation, the application first uses chitosan and polyoxyethylene as raw materials to prepare a chitosan film by electrospinning to obtain The chitosan film is used as the dressing base film. Because chitosan has the characteristics of non-toxicity, broad-spectrum antibacterial property, hemostasis, scar reduction and good biocompatibility, chitosan is selected as the main raw material, and Introduce plant extracts. The plant extracts of this application are ginseng extract + Ophiopogon japonicus extract, ginseng extract + chrysanthemum extract and ginseng extract + Artemisia annua extract. You can choose to mix and match at will. The invention has reasonable process design and simple operation, and the prepared combined dressing not only has excellent antibacterial performance, but also is non-toxic to human body, has good biocompatibility, and can promote skin surface wound healing when used, and has high practicability.
Owner:吉林省蓝浦浩业科技有限公司
A kind of preparation method of graphene
ActiveCN108793134BReduce dosageImprove performanceGrapheneBulk chemical productionGraphene flakeReaction temperature
Owner:中山市悦泰汽车零部件有限公司
Preparation method of industrial aminated graphene
ActiveCN108373149BReduce dosageLittle damage to the lamellar structureGrapheneBulk chemical productionCvd grapheneDiamine
Owner:CHANGZHOU HIGHBERY NEW NANO MATERIALS TECH CO LTD +1
Method for purifying humic acid pollutants in water by utilizing polyaniline
InactiveCN101928048BHigh amino contentImprove adsorption capacityWater contaminantsWater/sewage treatment by magnetic/electric fieldsSorbentPolyaniline
Owner:SHAANXI UNIV OF SCI & TECH
A kind of block quaternary ammonium group modified polysiloxane and preparation method thereof
Owner:HANGZHOU TRANSFAR FINE CHEM CO LTD +2
A kind of high biological activity chitin and its preparation method
The invention provides high-bioactivity chitin and a preparing method thereof. The preparing method comprises the steps of washing, drying and smashing an organism containing beta-chitin into powder; pouring the powder obtained through smashing into mixed base solution with the concentration of 0.5-10 M to be stirred for alkali treatment deproteinization; adding diluted hydrochloric acid solution into the product obtained after alkali treatment deproteinization, regulating the pH value to be 5-7, standing at 20-30 DEG C, removing inorganic salt, and conducting filtration to obtain beta-chitin. The chitin obtained by means of the technical scheme has the advantages of being high in molecular weight, high in adsorption capacity, high in amidogen remaining quantity, excellent in adsorbability, moisture absorbability and moisture retentivity, ultrahigh in beta-chitin deacetylation degree and the like, so that the product has quite high bioactivity and can be widely applied to the field of biological materials.
Owner:深圳市诺诚创业管理有限公司
A kind of formaldehyde capture agent and preparation method thereof
ActiveCN107185405BImprove removal efficiencyFast removal efficiencyDispersed particle separationHydroxylamineAlcohol
Owner:江苏宁而净环保科技有限公司
Plant extract combined dressing based on ginseng extract and preparation method thereof
The invention discloses a plant extract combined dressing based on ginseng extract and a preparation method thereof. During preparation, chitosan and polyoxyethylene serve as raw materials, a chitosan film is prepared through electrostatic spinning, the chitosan film serves as a dressing base film, chitosan has the characteristics of no toxicity, broad-spectrum antibacterial property, hemostasis, scar reduction, good biocompatibility and the like, so that chitosan is selected as a main raw material, and plant extracts are introduced; the plant extract is compounded by three combination modes of the ginseng extract and the radix ophiopogonis extract, the ginseng extract and the chrysanthemum extract and the ginseng extract and the artemisia apiacea extract, and matching and selection can be randomly carried out in actual operation. The process is reasonable in design and simple to operate, and the prepared combined dressing not only has excellent antibacterial performance, but also is non-toxic to a human body and good in biocompatibility, can promote healing of wounds on the skin surface during use, and has relatively high practicability.
Owner:吉林省蓝浦浩业科技有限公司
Polyurethane with amino-containing side chain and preparation method thereof
ActiveCN114478977AThe synthesis steps are simpleReaction conditions are easy to controlPolymer scienceAlcohol
The invention relates to polyurethane with an amino-containing side chain and a preparation method of the polyurethane. According to the technical scheme, the preparation method comprises the following steps: step 1, adding polymer dihydric alcohol and diisocyanate into an aprotic solvent, stirring for 0.5-6 hours under the condition of N2 atmosphere and 50-100 DEG C, then adding a chain extender, and stirring for 0.5-12 hours under the condition of 50-100 DEG C to prepare polyurethane containing double bonds; and step 2, adding a compound containing sulfydryl and amino and a photoinitiator into the polyurethane containing the double bonds prepared in the step 1, and reacting for 5 seconds to 6 hours under the conditions of room temperature and ultraviolet irradiation, so as to prepare the polyurethane containing the amino on the side chain. The preparation method has the characteristics of simple process, low cost, high efficiency, easiness in regulation and control of polymer structure, low toxicity, environment friendliness and easiness in industrial production, and the prepared polyurethane containing amino on the side chain is high in amino content, controllable, safe, non-toxic and wide in application prospect.
Owner:WUHAN UNIV OF SCI & TECH
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