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62results about How to "Uniform grafting" patented technology
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Preparation method for chitosan natural polymer modified crude oil desalting demulsifier
ActiveCN106188552ALimited demulsibilityIntensify the degree of emulsificationDewatering/demulsification with chemical meansQuaternary ammonium cationNon toxicity
The invention relates to a preparation method for a chitosan natural polymer modified crude oil desalting demulsifier. The method comprises the following steps: 1) modifying polyethylene glycol monomethyl ether by halogenating; 2) preparing glycidyl dimethyl alkyl ammonium chloride; 3) preparing quaternized carboxy alkyl chitosan; 4) causing the modified polyethylene glycol monomethyl ether to react with the quaternized carboxy alkyl chitosan, thereby obtaining a target product, polyethylene glycol monomethyl ether grafted quaternized carboxy alkyl chitosan. According to the invention, the chitosan natural high-molecular compound is taken as the raw material and has the advantages of wide resource, naturality, non-toxicity, sustainability, excellent biological compatibility of products, degradability, and the like. The demulsifier prepared according to the invention has excellent demulsification dewatering effect; the molecule of the demulsifier contains a large amount of carboxy alkyl groups and quaternary ammonium salt groups and the electronegative ions, including metal cation, naphthene acid radicals, and surfaces are electronegative grains and have strong combining capacity, so that the demulsifier has the capacities of demulsifying while removing oil-soluble salt.
Owner:WUHAN INSTITUTE OF TECHNOLOGY
Preparation method of polyether-grafted chitosan derivative crude oil desalting demulsifier
ActiveCN106279706AWide variety of sourcesDegradableDewatering/demulsification with chemical meansQuaternary ammonium cationPolyethylene glycol
The invention relates to a preparation method of a polyether-grafted chitosan derivative crude oil desalting demulsifier. The preparation method comprises the following specific steps: firstly, performing formylation modification on polyethylene glycol monoethylether; secondly, preparing glycidyl dimethyl alkyl ammonium chloride; thirdly, preparing quaternarization carboxyalkyl chitosan; fourthly, enabling formylation modified polyethylene glycol monoethylether to react with carboxy alkyl chitosan to obtain the polyether-grafted chitosan derivative crude oil desalting demulsifier. The polyether-grafted chitosan derivative crude oil desalting demulsifier disclosed by the invention is prepared by taking chitosannatural polymeric compounds as raw materials, and has the advantages of wide sources, naturalness, no toxicity, sustainability, good biocompatibility of a product, degradability and the like. The prepared demulsifier is good in demulsifying and dehydrating effect; meanwhile, a demulsifying molecule contains a large amount of carboxyalkyl groups and quaternary ammonium salt groups which have strong combining capacity to metal cation, ions with negative electricity such as naphthenic acid radicals as well as particles of which the surfaces are electronegative, so the polyether-grafted chitosan derivative crude oil desalting demulsifier has capacity of removing oil-soluble salts while demulsifying.
Owner:WUHAN INSTITUTE OF TECHNOLOGY
Synthesis method of crude oil desalting demulsifying agent
ActiveCN106279707ALimited demulsibilityIntensify the degree of emulsificationDewatering/demulsification with chemical meansHydrocarbon oils treatmentQuaternary ammonium cationSynthesis methods
The invention relates to a synthesis method of a crude oil desalting demulsifying agent. The method specifically includes the steps of firstly, conducting p-nitrophenyl ester modification on methoxypolyethylene glycol; secondly, preparing glycidyl dimethyl alkyl ammonium chloride; thirdly, preparing quaternized carboxy alkyl chitosan; fourthly, making the modified methoxypolyethylene glycol react with quaternized carboxy alkyl chitosan to obtain a product, namely polyethylene glycol questin grafted quaternized carboxy alkyl chitosan. A chitosan type natural high-molecular compound serves as the raw material and has the advantages of being wide in resource, natural, free of toxin, sustainable, good in product biocompatibility, degradable and the like; The prepared demulsifying agent is good in demulsifying dewatering effect; meanwhile, due to the fact that lots of carboxy alkyl groups and quaternary ammonium salt groups are contained in demulsifying agent molecules and have strong binding capacity with metal cations, naphthenic acid radicals and other ions with negative charges and particles with surface electronegativity, the oil-soluble salt removing capacity is achieved during demulsifying.
Owner:WUHAN INSTITUTE OF TECHNOLOGY
Preparation method of double-ion type crude oil desalting demulsifier
ActiveCN106220857AWide variety of sourcesSustainableDewatering/demulsification with chemical meansStrong bindingCarboxymethyl-chitosan
The invention relates to a preparation method of a double-ion type crude oil desalting demulsifier. The preparation method specifically comprises the following steps: (1) carrying out esterification modification on polyethylene glycol monomethyl ether; (2) preparing glycidyl dimethyl alkyl ammonium chloride; (3) preparing quaternary ammonium carboxymethyl chitosan; (4) making the modified polyethylene glycol monomethyl ether react with the quaternary ammonium carboxymethyl chitosan to obtain a polyethylene glycol monomethyl ether grafted quaternary ammonium carboxymethyl chitosan. The double-ion type crude oil desalting demulsifier takes natural macromolecular compounds of chitosan as raw materials, thereby having many advantages of wide sources, naturalness, no toxicity, sustainability, good product bio-compatibility and degradation and the like. The prepared demulsifier is good in demulsification and dehydration effects, furthermore, demulsifier molecules contain a large number of carboxyl alkyl groups and quaternary ammonium salt groups, so that the demulsifier has a very strong binding capacity for negatively charged ions such as metal cations, naphthenic acid radicals and particles of which the surfaces are electronegative, thereby further having the removal ability for oil soluble salts while performing demulsification.
Owner:WUHAN INSTITUTE OF TECHNOLOGY
Preparation method of polyelectrolyte-type crude oil-desalting demulsifier
ActiveCN106221728AWide variety of sourcesSustainableDewatering/demulsification with chemical meansHydrocarbon oils refiningQuaternary ammonium cationNon toxicity
The invention relates to a preparation method of a polyelectrolyte-type crude oil-desalting demulsifier. The preparation method comprises the following specific steps: (1) performing amination modification on methoxypolyethylene glycol; (2) preparing glycidyl dimethyl alkyl ammonium chloride; (3) preparing quaternized carboxyalkyl chitosan; (4) carrying out a reaction between the modified methoxypolyethylene glycol and the quaternized carboxyalkyl chitosan to obtain a target product methoxypolyethylene glycol-grafted quaternized carboxyalkyl chitosan. The polyelectrolyte-type crude oil-desalting demulsifier takes a natural macromolecule chitosan compound as a raw material, and has the advantages of wide sources, naturalness, non-toxicity, sustainability, good product biocompatibility, biodegradability and the like. The prepared demulsifier has good demulsifying and dehydrating effects; a demulsifier molecule contains a large number of carboxyalkyl groups and quaternary ammonium groups, which have very strong capacity of bonding metal cations, negatively-charged ions such as naphthenic acid radicals, and particles with negative charges on the surfaces, so that besides the demulsifying capability, the demulsifier also has the capability of removing oil-soluble salts.
Owner:WUHAN INSTITUTE OF TECHNOLOGY
Preparation method of chitosan type crude oil desalting demulsifier
ActiveCN106279708AIncreased difficulty of demulsificationWide variety of sourcesDewatering/demulsification with chemical meansHydrocarbon oils treatmentBiocompatibility TestingOil soluble
The invention relates to a preparation method of a chitosan type crude oil desalting demulsifier. The preparation method includes the steps of firstly, performing epoxidation modification on methoxy polyethylene glycol; secondly, preparing glycidyl dimethyl alkyl ammonium chloride; thirdly, preparing quaternization carboxy alkyl chitosan; fourthly, allowing the modified methoxy polyethylene glycol to react with the quaternization carboxyl alkyl chitosan to obtain methoxy polyethylene glycol grafted quaternization carboxy alkyl chitosan. The preparation method has the advantages that chitosan type natural high-molecular compounds are used as the raw materials, the method is wide is source, natural, nontoxic and sustainable, and the product of the method is good in biocompatibility, degradable, and the like; the prepared demulsifier is good in demulsifying and dewatering effect, the demulsifier has high combining capacity to electronegative ions such as metal cations and naphthene acid radicals and electronegative particles due to the fact that the molecules of the demulsifier contain a large amount of carboxyl alkyl groups and quaternary ammonium salt groups, and oil-soluble salt can also be removed during demulsifying.
Owner:WUHAN INSTITUTE OF TECHNOLOGY
Fibrilia grafting amination modifying process
InactiveCN101225602AQuick responseImprove grafting efficiencyDyeing processVegetal fibresFiberReaction rate
The invention discloses a linen fiber modification method, in particular to a linen fiber graft aminization modification craft, belonging to the technical field of printing and dyeing, which is characterized in that the linen fiber is selectively oxidized with oxidant solution such as sodium periodate, and oxidation linen fiber is obtained; the surface aldehyde group of the oxidation linen fiber is reacted with the surface amino of amine-terminated overbranched compound and the quaternary ammonium salt, which are combined by covalent bond, and the graft aminization linen fiber is prepared; the abundant amino, imino group and quaternary ammonium branched chain are introduced on the surface of obtained fiber, which can increase significantly the dyeing performance of linen fiber, and simultaneously increase the pliability softness, hygroscopicity and antibacterial performance of linen fiber. The linen fiber modification method has the advantages of fast reaction rate, high graft efficiency, good fastness, convenient and easy operation, realization of non-salt dyeing for linen fiber after modification treatment, environment protection, simplified normal dyeing craft and wide potential application.
Owner:SUZHOU UNIV
Process for modifying reaction at surface of separating film of polymer
InactiveCN1623639AEasy to operateGood repeatabilitySemi-permeable membranesHigh energyGraft reaction
A process for modifying the surface of polymer separating membrane by graft reaction includes such steps as immersing the membrane to be modified in supercritical CO2, triggering by free radical trigger or peroxide radical generated by high-energy radiation, diffusing various functional free-radical monomers onto the external and internal surfaces of said membrane by supercritical CO2 fluid, and graft reaction at proper temp and under proper pressure.
Owner:ZHEJIANG UNIV
Process for dyeing fabrics by combining with plasma and ultrasonic and special device thereof
InactiveCN101880960AImprove dye uptakeReduce dosageDry-cleaning apparatus for textilesUltrasonic/sonic fibre treatmentControl systemGraft reaction
The invention relates to the field of fabrics dyeing and finishing processes, in particular to a process for dyeing fabrics by combining with plasma and ultrasonic and a special device thereof. The special device comprises low-temperature normal-pressure plasma equipment, grafting reaction equipment, ultrasonic dyeing equipment, a rinsing bath and two groups of control systems, wherein the low-temperature normal-pressure plasma equipment, the grafting reaction equipment, the rinsing bath and the ultrasonic dyeing equipment are sequentially connected, one group of control systems is connected with the low-temperature normal-pressure plasma equipment, and the other group of control systems is connected with the ultrasonic dyeing equipment. The invention organically combines the low-temperature normal-pressure plasma equipment and the ultrasonic dyeing equipment, solves the problem that the dye uptake and the dyeing quality can not improved in a process of dyeing fabrics in a high crystalline region or solves the problem of high energy consumption and high pollution in the dyeing process, and can effectively realize that the dye uptake and the dyeing quality can be improved while realizing environmental-friendly production with low energy consumption and low pollution.
Owner:CHINA TEXTILE ACAD JIANGNAN BRANCH
Chemical modification technology of chemical nickel phosphorus plating alloy coating
InactiveCN101705480AModified applicableImproved resistance to localized corrosionLiquid/solution decomposition chemical coatingCarboxylic acidPetrochemical
The invention provides a process for preparing a sodium styrene sulfonate and acrylic acid modified nickel phosphorus plating alloy coating by respectively using a gamma-ray irradiation / chemical grafting technology. A polytetrafluoroethylene emulsion solution, a fluorocarbon cationic surfactant, sodium styrene sulfonate, acrylic acid and the like are used as raw materials, sodium styrene sulfonate and acrylic copolymers are uniformly grafted in a nickel phosphorus plating alloy coating through the gamma-ray irradiation / chemical grafting technology so as to enable the surface of the coating to be loaded with sulfonic acid groups and carboxylic acid groups which have cation selection penetration property, therbey effectively inhibiting and slowing the migration and the penetration of invasive chloride ions to the inner part of the coating, and improving the property of the conventional nickel phosphorus plating alloy coating resisting point corrosion, gap corrosion and intergranular corrosion caused by the invasive chloride ions. The sodium styrene sulfonate and acrylic acid modified nickel phosphorus plating alloy coating improves the corrosion property of the nickel phosphorus alloy coating in a sodium chloride medium, and expands the application to the fields of petrochemical complex, pump manufacture industry and the like.
Owner:YANSHAN UNIV
Method for preparation of coating against drug-resistant bacteria on medical catheter surface
InactiveCN108159505AUniform graftingStrong resistance to infectionPharmaceutical delivery mechanismCatheterMethacrylateInfection rate
The invention relates to the medical material field, in particular to a method for preparation of a coating against drug-resistant bacteria on a medical catheter surface. The method for preparation ofthe coating against drug-resistant bacteria on a medical catheter surface includes the steps of: pretreating the medical catheter surface; immobilizing an initiator on the pretreated medical cathetersurface; grafting a positively charged organic small molecule or a positively charged polymer as the monomer on the medical catheter surface, taking methacrylate polyethylene glycol as the cross-linking agent, adopting a surface initiated-supplement reduced atom transfer radical chemical grafting method to finally obtain a polycation layer antibacterial coating. The coating obtained by the methodprovided by the invention has the advantages of uniform grafting, excellent anti-infection performance, and an anti-infection rate to drug-resistant bacteria of 99% or more.
Owner:周超
Modified carbon fiber, and preparation method and application thereof
ActiveCN111116992AImprove electrical conductivityImprove electromagnetic shielding performanceShielding materialsPolymer chemistryResin composite
The invention belongs to the technical field of electromagnetic shielding, and particularly relates to a modified carbon fiber, and a preparation method and an application thereof. The preparation method of the modified carbon fiber comprises the following steps: a) dipping a dopamine modified carbon fiber into a solution containing a substance A to obtain a substance A-dopamine modified carbon fiber; b) mixing and reacting the substance A-dopamine modified carbon fiber and a dopamine modified filler in a liquid phase under an alkaline condition to obtain a filler modified carbon fiber; and c)carbonizing the filler modified carbon fiber to obtain the modified carbon fiber. The problems of poor dispersibility and easy agglomeration of a small-scale filler in a modified material are solved,and the filler in the provided modified carbon fiber is uniformly dispersed and has excellent electromagnetic shielding performance; and a resin composite material prepared from the modified carbon fiber has good electromagnetic shielding performance and mechanical strength.
Owner:LUOYANG CUTTING EDGE EQUIP TECH LTD +1
Color-absorbing fiber and method for preparing color-absorbing nonwoven fabric
ActiveCN103938298BGrafting is firmUniform graftingCellulose/protein filament chemical after-treatmentNon-woven fabricsDye absorptionCellulose
Owner:上海希丝无纺布制品有限公司
Ceramic membrane, chemical grafting modification method and application
ActiveCN113522053AUniform graftingWith modified effectSemi-permeable membranesGeneral water supply conservationOrganic solventMembrane surface
The invention relates to a ceramic membrane and an improved ceramic membrane chemical grafting modification method. A chemical modification layer exists on the surface of the ceramic membrane, no chemical modification layer is contained in pore channels of the inner wall, and the ceramic membrane shows good flux during liquid filtration. Meanwhile, according to the modification method provided by the invention, firstly, the ceramic membrane is filled with water through a vacuum pump, and then the surface of the membrane is placed at the interface of the organic solvent containing the silane modification liquid and the deionized water, so that the modified ceramic membrane with ideal surface properties is prepared. Through an interface chemical grafting modification method, the surface property of the ceramic membrane is adjusted, and the separation performance or the anti-pollution effect of the ceramic membrane is improved. Meanwhile, the grafting of the modified substance is limited in the surface area of the membrane, and only the aperture and porosity of the surface of the membrane are influenced. Compared with a modified membrane obtained by a traditional chemical grafting modification method, the modified membrane obtained by the method has the same modification effect, and meanwhile, attenuation of permeation flux is obviously reduced.
Owner:NANJING UNIV OF TECH
Method for preparing ion exchange fiber by ultraviolet grafting
InactiveCN104611926AAvoid influenceNo pollution in the processOther chemical processesFibre typesFiberIon exchange
The invention discloses a method for preparing an ion exchange fiber by ultraviolet grafting. The method comprises the steps of cleaning a polypropylene knitmesh, extracting the polypropylene knitmesh with acetone, taking the polypropylene knitmesh out for drying, soaking the extracted polypropylene knitmesh in an acetone or alcohol solution with 10-30wt% of benzophenone, taking the polypropylene knitmesh out after 10-30 min for natural airing in a dark place, putting the aired polypropylene knitmesh in a quartz tube with grafting reaction liquid, removing oxygen in a test tube by supplying nitrogen, carrying out reaction for 30-120 min under ultraviolet irradiation, and finally carrying out water washing, acetone extraction and drying to obtain the ion exchange fiber grafted with a carboxyl functional group on the surface. A preparation route and a method which are low in equipment investment, simple in technology, energy-saving and efficient and have no environmental pollution are established, and the ion exchange fiber with the characteristic of efficiently absorbing heavy metal ions is obtained.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN) +1
Nano-chitosan-modified cotton fiber and preparation method thereof
ActiveCN111411509AGood anti agingAvoid reunionPhysical treatmentBiochemical fibre treatmentCotton fibreCellulose
The invention discloses a nano-chitosan-modified cotton fiber and a preparation method of the nano-chitosan-modified cotton fiber. The preparation method of the nano-chitosan-modified cotton fiber comprises the steps: the cotton fiber is sent into a sodium hydroxide solution to be stirred, washed and dried, and sent into a sodium periodate solution to be stirred away from light to obtain an activated cotton fiber; nano chitosan, a cellulose dispersing agent and acetic acid are evenly mixed, isopropyl triisostearoyltitanate is added to be stirred, under the stirring state, tetraethylortho silicate is added, stirring is continued, and vacuum defoamation is conducted to obtain a pretreated nano chitosan solution; and the activated cotton fiber is steeped in the pretreated nano chitosan solution to be subjected to pulsed microwave treatment, filtered, and aired at the room temperature to obtain the nano-chitosan-modified cotton fiber. The cotton fiber is modified through the nano chitosanand thus has a good heat-insulating foundation and excellent antibacterial and anti-ultraviolet properties, the method is environmentally friendly, and the nano-chitosan-modified cotton fiber can be applied to the fields of medical health and antibacterial fabrics.
Owner:安徽省农业科学院棉花研究所
Preparation method for grafting maleic anhydride onto plasma activated carbon nano tube
The invention discloses a preparation method for grafting maleic anhydride onto a plasma activated carbon nano tube. The method comprises the following steps: preparing the plasma activated carbon nano tube, preparing maleic anhydride dimethylbenzene solution, carrying out ultrasonic treatment on the plasma activated carbon nano tube, and utilizing microwaves to initiate the purification of the plasma activated carbon nano tube on which the maleic anhydride is grafted. The invention utilizes the plasma activated microwave induced grafting technology to improve the compatibility of a carbon nano tube with the maleic anhydride, and obtains the modified carbon nano tube with the highest grafting ratio of 15%. The invention has the advantages of easy obtainment of raw materials, simple operation, simple and convenient apparatuses, short grafting reaction time of 20-60 min, easy control of product performance and structure.
Owner:UNIV OF SHANGHAI FOR SCI & TECH
A method and device for surface modification of polymer materials
ActiveCN101831079BRealize industrial continuous productionUniform graftingTemperature controlGas phase
The invention provides a method for surface modification of a polymer material: the polymer material is first subjected to surface plasma treatment; then the treated polymer material is put into a gas-phase grafting reaction device that has been heated to 50-150°C in advance, Subsequently, a gaseous or atomized monomer is introduced to carry out a gas-phase grafting reaction with the surface of the treated polymer material, and the device for performing the above reaction includes a plasma grafting device, and the plasma grafting device includes a polymer The material surface plasma treatment device and the polymer material surface gas phase grafting reaction device after plasma treatment are characterized in that a temperature control system is set in the plasma grafting device. The device and method have the advantages of controllable temperature during graft polymerization, short polymerization reaction time, ideal grafting effect, continuous industrial processing, and the like.
Owner:CHINESE TEXTILE ACAD
Polyketone-grafted modified mesoporous silicon oxide material preparation method
The invention relates to a polyketone-grafted modified mesoporous silicon oxide material preparation method comprising the steps that: (1) mesoporous silicon oxide is subjected to pretreatment, such that clean mesoporous silicon oxide is obtained; (2) the mesoporous silicon oxide obtained in the step (1) is subjected to a reaction with a coupling agent 3-acryloyloxy propyl trichlorosilane, such that coupling-agent-loaded mesoporous silicon oxide is obtained; (3) the coupling-agent-loaded mesoporous silicon oxide is subjected to a reaction with a late transition metal catalyst Pd-alpha-diimine, such that catalyst-loaded mesoporous silicon oxide is obtained; and (4) the catalyst-loaded mesoporous silicon oxide is added into a reaction vessel; 2,2'-bipyridine and 4-tert-butyl styrene (TBS) are added under an atmosphere of carbon monoxide, such that a polymerization reaction is carried out; the obtained reaction mixture is subjected to separation and purification, such that the polyketone-grafted modified mesoporous silicon oxide material is obtained. The method provided by the invention has the advantages of simple process and mild polymerization conditions. With the method, polyketone is grafted on the surface of mesoporous silicon oxide with a covalent bond form, such that the material is more stable than that of other methods.
Owner:ZHEJIANG UNIV OF TECH
Preparation method of rice straw-acrylic acid-acrylamide graft copolymer
InactiveCN107540794AUniform graftingIncrease the degree of cross-linkingSuper absorbentSample purification
The invention provides a preparation method of a rice straw-acrylic acid-acrylamide graft copolymer, and relates to the technical field of preparation methods of super absorbent resin. Decrystallization of rice straw is firstly carried out, AA and AM powder, a polymerization inhibitor FeSO4.7H2O, and N,N'-methylenebisacrylamide are added into water with uniform stirring, irradiation polymerizationand sample purification are carried out, the super absorbent rice straw-acrylic acid-acrylamide graft copolymer is prepared, and comprehensive utilization of straw is realized.
Owner:CHIZHOU UNIV
Xanthan gum- azo-vinyl pyrrolidone graft copolymer and preparation method and application thereof
InactiveCN102532417ANo pollution in the processRapid responseOther chemical processesWater contaminantsRadioactive agentSolvent
The invention discloses xanthan gum- azo-vinyl pyrrolidone graft copolymer and a preparation method and application thereof. The preparation method includes the following steps: evenly mixing N-vinyl pyrrolidone and xanthan gum in solvent, conducting irradiation on the mixture through gama ray produced by radioactive substances to obtain the xanthan gum- azo-vinyl pyrrolidone graft copolymer. In the method, the irradiation dose is 4-16 kGy, preferably 8-10 kGy, and more preferably 10kGy; mass ratio of the N- vinyl pyrrolidone and the xanthan gum is 2-14:1, preferably 8-10:1, and more preferably 10:1; dosage ratio of the xanthan gum and the solvent is 4-14g:1L, preferably 8-12g:1L, more preferably 10g:1L. The graft copolymer obtained in the method has high adsorption capability to both phenol and tea polyphenol and has important application value.
Owner:INST OF AGRO FOOD SCI & TECH CHINESE ACADEMY OF AGRI SCI
Composition for preparing SEBS/PP blended grafted modification material and preparation method adopting same
ActiveCN105859984AGood light transmissionImprove interfacial adhesionRadiation DosagesBonding process
The invention discloses a composition for preparing an SEBS / PP blended grafted modification material and a preparation method adopting the same. The composition is prepared from, by mass, 90-100 parts of SEBS, 2-8 parts of MAH and 10-15 parts of PP. The preparation method comprises the steps that 1, all the components in the composition are weighed by mass of parts; 2, the weighed SEBS is subjected to forced air drying under the temperature of 55-65 DEG C for 24 h; 3, the dried SEBS is added into a feeder of a two-screw extruder; 4, the weighed MAH and PP are added into molten SEBS in the two-screw extruder for extrusion, and the two-screw rotating speed of the two-screw extruder is 60-150 rads / min; 5, extrudate is subjected to air cooling and grain-sized dicing to prepare granules; 6, the granules are subjected to radiation treatment by means of cobalt-60 radiation source under the limited oxygen phenomenon, the radiation dosage is 1-50 KGray, and the radiation time is 10-30 min. The SEBS / PP blended grafted modification material prepared through the formula and the preparation method ensures the bonding strength in the SEBS bonding process and also keeps the SEBS transparency.
Owner:ANTA CHINA
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
Charged nanofiltration membrane preparing method
InactiveCN104998563AUniform membrane structureStable rejection rateSemi-permeable membranesUltrafiltrationIon
The invention discloses a charged nanofiltration membrane preparing method. According to the method, a newly-prepared ultrafiltration membrane serves as a base membrane, base membrane polymer is photosensitive polymer with a main chain or a side chain provided with carbonyl or sulfonyl, the base membrane is soaked in a rigid airtight container containing a grafting monomer solution after being cleaned, vacuumizing is conducted on the rigid airtight container after the base membrane is soaked, and the intensity of pressure in the container is made to be negative pressure; the processed base membrane is taken out to be placed under an ultraviolet lamp to conduct stem grafting in an illumination mode, nitrogen is injected to protect the base membrane, then the base membrane is taken out to be cleaned with deionized water more than three times, and a charged nanofiltration membrane is obtained. According to the method, an interfacial polymerization mode is adopted, the positively-charged nanofiltration membrane is prepared on the base membrane, the prepared nanofiltration membrane is charged, high in stability, high in retention rate and capable of achieving industrial production on the basis of an existing composite film production line.
Owner:WUXI QIAOYANG MACHINERY MFG
A kind of glass fiber reinforced hot-melt adhesive bonding resin and preparation method thereof
ActiveCN108059933BHigh strengthGood moisture resistance and high temperature resistanceNon-macromolecular adhesive additivesPolymer scienceAntioxidant
The invention discloses glass fiber enhanced hot melt adhesive bonding resin and a preparation method thereof. The glass fiber enhanced hot melt adhesive bonding resin is prepared from the following raw material components in parts by mass: 100 parts of polypropylene, 20 to 30 parts of EVA (Ethylene-vinyl Acetate) wax, 1 to 3 parts of graft maleic anhydride, 0.03 to 0.1 part of dicumyl peroxide, 10 to 20 parts of glass fiber, 0.1 to 5 parts of an antioxidant, 1 to 5 parts of methyl methacrylate, 3 to 5 parts of an amino-silane coupling agent, 1 to 3 parts of vinyl-triethoxy siloxane and 5 to 10 parts of CPE chlorinated polyethylene. The bonding resin disclosed by the invention has the advantages of high strength, low cost and good comprehensive performance and has good bonding performance.
Owner:SHANGHAI BANZAN MACROMOLECULE MATERIAL
Preparation method of nickel phosphorus alloy plating on surface of sintered neodymium iron boron permanent magnet
InactiveCN102400118BImprove the protective effectInhibit and slow down migration and penetrationLiquid/solution decomposition chemical coatingChemical treatmentSurface-active agents
The invention relates to the field of chemical treatment of metal material surfaces, in particular to a preparation method of a corrosion-resistant chemical nickel-plated phosphorus alloy plating. Reagents such as polyvinylidene fluoride, fluorine carbon type cationic surface active agents, 2-acrylamido-2-methyl-1-propane sulfonic acid and the like are adopted as raw materials; and through a solution-alkalization / thermal-induction chemical stem grafting technology, 2-acrylamido-2-methyl-1-propane sulfonic acid polymers are evenly grafted into the chemical nickel-plated phosphorus alloy plating, so as to enable the surface of the plating to be loaded with sulfonic acid groups with cation selective permeability. By adopting the preparation method, the migration and the permeating of chloride ions towards the inner part of the plating can be effectively restrained and retarded, the occurrence of pitting corrosion, slot corrosion and intergranular corrosion caused by the aggressive chloride ions is reduced, the protection performance of the nickel phosphorus alloy plating over a sintered neodymium iron boron permanent magnet is improved, and the application of the sintered neodymium iron boron permanent magnet to each industrial field is expanded.
Owner:CENT IRON & STEEL RES INST
Preparation method for grafting maleic anhydride onto plasma activated carbon nano tube
The invention discloses a preparation method for grafting maleic anhydride onto a plasma activated carbon nano tube. The method comprises the following steps: preparing the plasma activated carbon nano tube, preparing maleic anhydride dimethylbenzene solution, carrying out ultrasonic treatment on the plasma activated carbon nano tube, and utilizing microwaves to initiate the purification of the plasma activated carbon nano tube on which the maleic anhydride is grafted. The invention utilizes the plasma activated microwave induced grafting technology to improve the compatibility of a carbon nano tube with the maleic anhydride, and obtains the modified carbon nano tube with the highest grafting ratio of 15%. The invention has the advantages of easy obtainment of raw materials, simple operation, simple and convenient apparatuses, short grafting reaction time of 20-60 min, easy control of product performance and structure.
Owner:UNIV OF SHANGHAI FOR SCI & TECH
A kind of modified carbon fiber, preparation method and application
The invention belongs to the technical field of electromagnetic shielding, and in particular relates to a modified carbon fiber, a preparation method and an application. The modified carbon fiber provided by the present invention is prepared according to the following steps: a) immersing the dopamine-modified carbon fiber in a solution containing substance A to obtain substance A-dopamine-modified carbon fiber; b) under alkaline conditions, the substance A ‑ Dopamine-modified carbon fiber and dopamine-modified filler are mixed and reacted in the liquid phase to obtain filler-modified carbon fiber; c) carbonizing the filler-modified carbon fiber to obtain modified carbon fiber. The invention solves the problem of poor dispersion and easy agglomeration of small-scale fillers in the modified material, and provides uniform fillers in the modified carbon fiber with excellent electromagnetic shielding performance; the resin composite material made of the modified carbon fiber has good performance Electromagnetic shielding performance and mechanical strength.
Owner:LUOYANG CUTTING EDGE EQUIP TECH LTD +1
Preparation process of a flame-retardant wear-resistant cable
ActiveCN112908571BUniform graftingImprove performanceCable/conductor manufactureElastomerPolymer science
The invention discloses a preparation process of a flame-retardant wear-resistant cable. The specific preparation process is as follows: adding a flame-retardant polymer, dioctyl phthalate, talcum powder, wear-resistant additives, antioxidants, and colorants to a high Stir evenly in a mixer, then add to an internal mixer for banburying, extrude through a screw, and granulate to obtain a cable material. In the branched aldehyde-based polyphenylene ether prepared by the present invention, a large amount of aldehyde groups are evenly grafted on the benzene ring, and at the same time, a large amount of amino groups are grafted on the chain of the aminated elastomer modifier, and the aldehyde groups and amino groups can be polymerized, and then Make the aminated elastomer modifier evenly grafted on the branched aldehyde-based polyphenylene ether, and at the same time, because the branched aldehyde-based polyphenylene ether is a branched structure, it can improve the dispersion performance with the aminated elastomer modifier, making the aminated The elastomer modifier is grafted uniformly in the polymer, which improves the performance of the polymer.
Owner:广东腾丰电线电缆实业有限公司
A kind of preparation method of double ionic crude oil desalting demulsifier
ActiveCN106220857BWide variety of sourcesSustainableDewatering/demulsification with chemical meansQuaternary ammonium cationStrong binding
The invention relates to a preparation method of a double-ion type crude oil desalting demulsifier. The preparation method specifically comprises the following steps: (1) carrying out esterification modification on polyethylene glycol monomethyl ether; (2) preparing glycidyl dimethyl alkyl ammonium chloride; (3) preparing quaternary ammonium carboxymethyl chitosan; (4) making the modified polyethylene glycol monomethyl ether react with the quaternary ammonium carboxymethyl chitosan to obtain a polyethylene glycol monomethyl ether grafted quaternary ammonium carboxymethyl chitosan. The double-ion type crude oil desalting demulsifier takes natural macromolecular compounds of chitosan as raw materials, thereby having many advantages of wide sources, naturalness, no toxicity, sustainability, good product bio-compatibility and degradation and the like. The prepared demulsifier is good in demulsification and dehydration effects, furthermore, demulsifier molecules contain a large number of carboxyl alkyl groups and quaternary ammonium salt groups, so that the demulsifier has a very strong binding capacity for negatively charged ions such as metal cations, naphthenic acid radicals and particles of which the surfaces are electronegative, thereby further having the removal ability for oil soluble salts while performing demulsification.
Owner:WUHAN INSTITUTE OF TECHNOLOGY
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