106results about How to "Facilitate grafting" patented technology

The invention belongs to the field of super-amphiphobic materials and discloses a crosslinkable fluorosilicone resin, a coating and a super-amphiphobic coating prepared from the crosslinkable fluorosilicone resin and the coating. The crosslinkable fluorosilicone resin is compared via the steps as follows: hydrogeneous organosilicon A, crosslinkable substance B, fluorine-containing substance C and modified silicon dioxide D are mixed in a dissolvent, added into a reactor, and introduced with inert gas, agitation is kept at a speed of 100-1,000 rpm, the temperature is raised to 60-140 DEG C, an activator is added and agitated for 5-24 h, the reagent is deposited into n-hexane or methanol. The crosslinkable fluorosilicone resin coating is formed by crosslinkable fluorosilicone resin, a curing agent, an activator and a dissolvent; the super-amphiphobic coating is formed by that a substrate is immersed in the crosslinkable fluorosilicone resin painting, or the crosslinkable fluorosilicone resin painting is sprayed on the surface of the substrate and baked in a baking oven for 1-20 h at 40-120 DEG C.

The invention belongs to the field of super-amphiphobic materials, and discloses amphiphilic crosslinkable fluorosilicon resin, a water-borne coating and a super-amphiphobic coating prepared through the water-based paint. The amphiphilic crosslinkable fluorosilicon resin is prepared by the means that hydrogen containing organic silicon A, the epoxy containing substance B, the fluorine containing substance C, modified silicon dioxide D and the hydrotropic substance E are mixed into a solvent, the mixture is added into a reaction kettle, inert gas is bubbled into the reaction kettle, the temperature is increased to 60-140 DEG C under the stirring condition, then the catalyst F is added, stirring is performed for 5-24 hours, and the reactant is precipitated into normal hexane or methyl alcohol; the amphiphilic crosslinkable fluorosilicon resin coating is dissolved in a aqueous-organic solvent, water is dropwise added into the maxture, so that the amphiphilic crosslinkable fluorosilicon resin coating is obtained; curing agent is added into the amphiphilic crosslinkable fluorosilicon resin water-borne coating, the mixture is stirred uniformly, then a base material is soaked into the amphiphilic crosslinkable fluorosilicon resin coating, or the amphiphilic crosslinkable fluorosilicon resin coating is sprayed on the surface of the base material, and drying operation is performed, so that the super-amphiphobic coating is obtained.

The invention discloses a method for modifying wood by filling grafted cell walls with organic monomers and polymerization-filling cell cavities, which relates to a wood modification method. The invention solves the problem of difficulty in simultaneously enhancing mechanical properties and durability of wood in the existing wood modification method. The method comprises the following steps: 1, preparing organic acid anhydride solution; 2, soaking the wood with the organic acid anhydride solution; 3, filling grafted wood cell walls with organic acid anhydride by heating; 4, preparing the organic polymerizable monomer solution; 5, soaking the wood with the organic polymerizable monomer solution; and 6, carrying out polymerization-filling on the wood cell cavities with the monomers by heating. Since organic function micromolecules firstly enter the wood cell walls, the method realizes filling and bonding and eliminates a great deal of hydroxyl groups in the cell walls, thereby enhancing wood durability; and the wood cell cavities are soaked by the organic polymerizable monomers to initiate the polymerization and realize the filling of the cell cavities, so that the wood has higher mechanical properties and durability.

The invention discloses a multi-color optical encoding nano-rod with silica shell. The multi-color optical encoding nano-rod takes the shape of a core shell, the shell is made of silicon dioxide and the kernel is fluorescence-encoded polylysine which contains fluorescent dye A and fluorescent dye B; the fluorescent dye A and fluorescent dye B are a fluorescence resonance energy transfer supplier-receptor pair. The invention also discloses a method for preparing the multi-color optical encoding nano-rod with silica shell, which includes the steps of enabling the fluorescent dye A and fluorescent dye B to react with the polylysine to prepare fluorescence-encoded polylysine, and wrapping the fluorescence-encoded polylysine, used as kernel material, in a silicon dioxide substrate through reverse microemulsion method; in this way, the multi-color optical encoding nano-rod with silica shell can be prepared. The multi-color optical encoding nano-rod with silica shell has the advantages of strong fluorescence intensity, good biological compatibility, good hydrophilicity, little leakage of dye and stable property.

The invention belongs to the technical field of rubber seal and discloses a heat-resistant and oil-resistant butadiene-acrylonitrile rubber material as well as a preparation method and application thereof. The butadiene-acrylonitrile rubber material comprises the following components in parts by mass: 100 parts of butadiene-acrylonitrile rubber,3-5 parts of zinc oxide, 3-5 parts of light magnesium oxide, 0.3-0.6 part of stearic acid, 35-50 parts of carbon black, 2-3 parts of a reactive antioxidant, 2-3 parts of 2-mercapto benzimidazole zinc salt, 1.5-2.3 parts of peroxide, 0.8-3 parts of N,N'-m-phenylene dimaleimide and 0.1-0.2 part of 4-hydroxy-2,2,6,6-tetramethylpiperidine-1-oxygen radical. After the rubber material is subjected to hot-air ageing at 120 DEG C for 70 hours, the permanent compression deformation rate (a type B sample) is not more than 18% and the break elongation rate and the retention rate are more than 90%. The rubber material is especially suitable for manufacturing oil-resistant static seal parts capable of being used at 100-120 DEG C for a long term, and can endow seal products with excellent durability.

The invention belongs to the technical field of composite medicine materials as well as a preparation method and application thereof, more particularly discloses a nanoparticle for embedding medicinal Adriamycin. The nanoparticle has a core-shell type structure with an inner core embedded by an outer shell, wherein the inner core is embedded medicinal adriamycin, and the material for the outer shell is silicon dioxide; and the preparation method of the nanoparticle comprises the following steps of: evenly mixing cyclohexane, a surfactant and n-hexylalcohol, adding a sodium fluoride solution into the mixed solution after being evenly mixed to form a reverse-phase microemulsion; adding adriamycin and tetraethoxysilane into the reverse-phase microemulsion, and reacting to obtain a nanoparticle microemulsion system for embedding the adriamycin; adding a silylanization reagent containing functional groups into the microemulsion system, stirring for reacting, adding ethanol and demulsifying, centrifuging and then preparing the nanoparticle for embedding the medicinal adriamycin and modifying the functional groups. The nanoparticle embedding for the adriamycin has good stability, good biocompatibility, long slow-release time, large drug-loading rate, high medicine packaging rate, and the like, and has application prospect in the fields of tumor imaging and treatment.

The invention discloses a polymer porous microsphere, and a preparation method and applications thereof. A carbon sphere, and a preparation method and applications thereof are also disclosed. The carbon sphere is prepared from the polymer porous microsphere. An ultra-black material composition, and a ultra-black material prepared from the same and applications are disclosed as well. The ultra-black material composition includes the carbon sphere. As a linear polymer containing groups like halogen and hydroxy and having no heteroatom on a main chain has high degree of crystallinity and abundantcrystal types, the morphology of the obtained microsphere is also special, and a composition structure can include a sheet structure, a bicontinuous structure and a fibrous structure. The morphologyof the polymer porous microsphere can maintain unchanged through carbonization, so that the prepared carbon sphere can well maintain the morphology structure and porosity of the polymer porous microsphere; and a graphite structure with multiple defects can be formed during carbonization, so that the pore canal structure can be more abundant, and especially, the volumes of micropores can be greatlyenhanced.

The invention discloses a sulfhydryl-double bond reaction-based acrylate ester/montmorillonite composite and a preparation method. The preparation method is characterized by comprising the steps of: firstly, forming intercalation modification chemical bond grafted acrylic ester functionalized nano-montmorillonite, then mixing the synthesized polyfunctional group sulfur alcohol, acrylate ester oligomer, acrylate monomer and a light initiator, and finally performing ultraviolet light irradiation to obtain the acrylate ester/montmorillonite ultraviolet cured nano composite. A line for synthesizing a polyfunctional group acrylate ester silane coupling agent and the polyfunctional group sulfur alcohol is simple and easy without toxicity; compared with the traditional method in which the initiator takes up 3 to 5% of total mass, the preparation method disclosed by the invention has the advantages that the usage amount of the light initiator is greatly reduced and only takes up 0.1-0.8% of the total mass, the residual light initiator can be effectively reduced, the harm of fragments to the environment and the health of a human body can be reduced, and higher reaction activity and conversion rate can be achieved; and the compatibility between inorganic components and organic components in the composite is good, and the mechanical property and heat-resistant property are obviously improved.

The invention relates to a high-hydroxyl-value dry short-oil alkyd resin grafted and modified by acrylic acid, and a preparation method thereof. The compositions and weight percentages of the resin are as follows: 28 percent to 33 percent of dry oil, 26 percent to 35 percent of polyatomic alcohol, 26 percent to 43 percent of polyprotic acid, 13 percent to 20 percent of acrylic monomers, 1.2 percent to 2 percent of initiators and trace catalysts. The short-oil alkyd resin prepared by the preparation method can react with a cross-linked resin to form a mesh spatial structure with large cross linking degree so that coating structures are quite compact and not easy to be penetrated by chemical substances. The short-oil alkyd resin has fast curing performance under low temperature and high corrosion prevention performance, and the assembly line work thereof can be realized, thus being helpful to promoting the manufacturing technology levels of protective coating at the back of eyeglasses in China, breaking the monopoly of products of large foreign companies and reducing the production cost and operating cost of the eyeglass manufacturing industry in China.

The invention relates to a primer base for the back of ultra fast curing glasses, the components of which by weight percentages are respectively: 28 percent to 35 percent of propyl modified resin mixed solution, 7 percent to 12 percent of crosslinking resin, 3 percent to 8 percent of epoxy resin, 24 percent to 28 percent of pigment, 2 percent to 4 percent of promoter and 14 percent to 18 percent of solvents. The materials are mixed evenly, stirred and ground until the fineness is qualified, thus obtaining the finished product of the primer base for the back of the glasses. The primer base for the back of the glasses prepared by the invention takes the propyl modified resin as a basic film forming substance and adopts amino resin as the crosslinking resin and the epoxy resin, the coloring pigment, the antirust pigment, a filler, the promoter and the various mixed solvents are added, so that the primer base after film forming has level and smooth surface, good adhesion, proper degree of hardness and brittleness, improved water and chemical resistance, good moisture and heat resistance and salt-mist resistance and especially obviously improved xylene wiping resistance and CASS resistance. During the process of application, curtain coating is stable, does not branch off and is totally dried during 6 minutes to 10 minutes of curing process at the temperature of 130 DEG C to 140 DEG C.

The invention relates to a fiber-reinforced polyethylene glycol terephthalate composite material and a preparation method thereof. The composite material is prepared from the following raw materials: 65 to 85 weight parts of PET, 15 to 35 weight parts of fiber, 1 to 10 weight parts of vinyl-group multifunctional-group monomer and 2 to 10 weight parts of composite auxiliary. The raw materials PET and fiber are dried, and the PET, the vinyl-group multifunctional-group monomer and the composite auxiliary are uniformly mixed to be added into a material cooling cut granules extruded out by a double-screw extruder, the granules are dried, under the protection of N2, a Co-60 source or an electronic beam is used for irradiation, and the irradiation dosage is from 10 to 120kGy to obtain the fiber-reinforced high-performance PET composite material. The dynamic performance of the material is higher than that of the glass-fiber-reinforced product, wherein the tensioning strength is 156MPa, the breaking elongation rate is 3.8 percent, the bent strength is 236MPa, the bent modulus is 11.6GPa, and the impact strength of a Izod gap is 9.1kJ/m<2>.

The invention relates to a dissolution-resistant guanidine antibacterial agent and a preparation method thereof. The preparation method comprises the following specific steps: preparing any one or a mixture of two of polyhexamethylene guanidine hydrochloride and polyhexamethylene biguanidine hydrochloride into a guanidine salt solution with a certain concentration, adding an organic acid salt sodium salt or potassium salt into the guanidine salt solution, and reacting for a period of time to obtain a water-insoluble product; and washing the product, drying, grinding and crushing to obtain thepowdery dissolution-resistant guanidine antibacterial agent. The dissolution-resistant guanidine antibacterial agent prepared by the method has a relatively good long-acting antibacterial effect and is simple in preparation process, green and environment-friendly and is suitable for industrial production and can be widely applied to TPU, PP, PE and other high polymer materials.

The invention discloses a method for preparing grafting polyvinylidene fluoride on graphene oxide, and belongs to the field of materials. The method for preparing the grafting polyvinylidene fluorideon graphene oxide comprises the steps of 1, adopting an improved Hummer's method for preparing graphene oxide; 2, modifying the surface of graphene oxide; 3, preparing a polymer of grafting polyvinylidene fluoride on graphene oxide. According to the method, the grafting rate can be obviously increased, and the preparing technology is simple, and the method suitable for industrial production; the prepared material has the advantages of being high in tensile strength, good in heat stability and high in mechanical strength.

The invention provides a modified carbon fiber reinforced polyamide 6 wire for 3D printing, and a preparation method and application thereof. A modified carbon fiber reinforced polyamide 6 composite material of the invention is prepared from the following components in parts by weight: 85-95 parts of a polyamide 6 material, 5-15 parts of carbon fibers and 1-3 parts of a modified silane coupling agent. According to a technical scheme provided by the invention, carbon fiber grafting is facilitated by utilizing the modified silane coupling agent; the prepared composite material has the characteristics of uniform wire diameter, smooth surface, excellent mechanical property and relatively small material shrinkage rate, can be applied to the field of 3D printing consumables, and overcomes the technical defects that a polyamide 6 material is prone to buckling deformation in the printing process, the mechanical property of a printed member is poor and wires are prone to generation of bubbles in the prior art. The polyamide 6 printing wire of the invention has practical value, the maximum tensile strength of the polyamide 6 printing wire can exceed 110 MPa under the condition of a low carbon fiber content (10-15%), and the polyamide 6 printing wire is far superior to many polyamide 6 printing wires on the market.

The invention discloses a preparation method for a controllable biodegradable material. The preparation method is characterized by comprising the following steps of: 1) starch radiation modification; 2) mixing: adding a nanometre assistant, polyvinyl alcohol, stearic acid, polylactic acid, a radiation sensitizer and an accelerant in the treated modified starch, adequately stirring, and uniformly mixing; 3) radiation copolymerization: placing the mixed sample in an aluminium foil bag carrying out packaging and sealing treatment in a vacuum or by charging nitrogen, and then carrying out radiation treatment on the packaged sample; 4) granulation/membrane preparation: uniformly pouring the mixture subjected to radiation copolymerization in a double-screw double-exhaust extrusion granulator group or a double-screw double-exhaust extrusion pelletizer group, and carrying out extrusion granulation or pelletizing; 5) radiation degradation rate control: radiating the product obtained by granulation/membrane preparation while controlling the dosage to be 10-100 kGy and controlling the dosage non-uniformity U of the product to be not greater than 1.3. According to the preparation method disclosed by the invention, the problems of cumbersome process, high-temperature energy consumption, and inevitably-brought pollutant discharge of a common chemical method are overcome, and the object of controlling the decomposition rate is realized.

The invention discloses a grafting assistant device for apple tree planting. The grafting assistant device comprises two clamping plates, a fixing ring is fixed on the outer wall of one side of each of the clamping plates through a bolt, a binding belt is socketed on the outer wall of one side of each fixing ring, a first fixing seat is fixed on one side of the top outer wall of each clamping plate through bolts, a first through hole is formed in the outer wall of one side of each first fixing seat, a same first iron wire is connected on the circumferential inner wall of each first through hole, and a second fixing seat is fixed on one side of the bottom outer wall of each clamping plate through bolts. The clamping plates are fixed more stably through constraining from the above, the middle and the below, convenience is brought to scion grafting, and the grafting assistant device is more fitted to an apple tree, so that survival rate is increased; length of a moving rod can be adjustedto suit branches different in thickness, development is accelerated, development period is shortened, the survival rate is increased, midway death is reduced, direct sunlight is avoided, convenienceis brought to protecting branches and leaves, and grafting success is ensured.

The invention discloses C30 concrete and a production process thereof, belonging to the technical field of concrete. According to main points of a technical scheme in the invention, the C30 concrete comprises the following raw materials in parts by weight: 290 to 310 parts of cement, 170 to 180 parts of water, 680 to 700 parts of sand, 1250 to 1260 parts of broken stone, 4-6 parts of a polycarboxylate superplasticizer, and 8-10 parts of modified palm fiber. The C30 concrete has the advantage of being not prone to cracking.

The invention relates to a graphene modified epoxy resin material and a preparation method thereof.The preparation method comprises the steps that firstly, carboxylated graphene is obtained after graphene is acidized, a graphene grafted silane coupling agent and graphene doped epoxy resin are prepared from the carboxylated graphene, and the graphene doped epoxy resin and an inorganic nano filler are heated and mixed; and the graphene grafted silane coupling agent and a curing agent are added, uniformly stirred, and vacuum degassing treatment is carried out to finally obtain the modified epoxyresin material. The shrinkage rate of the epoxy resin in the curing process is effectively reduced by utilizing the large specific surface area of the graphene and the nano-size effect of the nano inorganic filler, and the graphene of the layered structure is doped in the epoxy resin, so that the resin and the filler are mixed more sufficiently; in the curing process, the silane coupling agent grafted and modified by graphene participates in epoxy resin copolymerization, so that the structural stability of the resin material is improved, peeling or cracking caused by resin expansion at high temperature is avoided, and the bonding strength and the heat-resistant stability of the resin material are effectively improved.

The invention discloses a preparation method of ectoin-hyaluronic acid composite gel and an obtained product. The preparation method comprises the following steps: firstly, preparing a cross-linking agent EBD by a step-by-step method; then, subjecting the EBD and BDDE, used as mixed cross-linking agents, to a cross-linking reaction with hyaluronic acid or salt thereof to prepare cross-linked hyaluronic acid gel, adding free epsilon-polyine to the cross-linked hyaluronic acid gel again, and mixing the components to prepare the ectoin-hyaluronic acid composite gel. The composite gel provided bythe invention contains free and cross-linked ectoin, not only has a filling effect, but also can achieve anti-aging and skin repair and regeneration effects in the whole hyaluronic acid gel filling period through the matching of the two forms of ectoin; in addition, the product, as a viscoelastic agent for adjuvant therapy in glaucoma surgery, lacrimal passage occlusion surgery, vitrectomy and other surgeries, has higher potential and effect.

The invention relates to the technical field of medical appliances, and discloses high-temperature-resistant medical gloves, which are prepared from 52-54 parts of low-density polyethylene, 33-35 parts of epoxy resin, 27-29 parts of polyvinyl alcohol, 6-8 parts of sodium polyacrylate, 7-9 parts of nanometer titania, and 11-13 parts of egg-shell type nano-catalyst. The high-temperature-resistant medical gloves are easy to prepare, high in high temperature resistance performance and capable of being reused, and accordingly can save a great amount of medical cost and reduce pollution to environment. As modified low-density polyethylene and epoxy resin are mixed and then heated and molten rapidly, grafting between the modified low-density polyethylene and epoxy resin is improved, stability andheat resistance of raw materials are improved, the gloves can bear repeated high-temperature sterilization, and durability of the gloves is improved. Further, with adding of heated sodium polyacrylate and nanometer titania for grafting based on full stirring, film formation property and wear resistance property of the raw materials are improved, and the shaped gloves have smooth surface, and accordingly are not easy to be broken by scraping or be infected crossly by germs.