58results about How to "Composition adjustable" patented technology

The invention relates to a preparation method, a raw material, a product and an application of an optical coupling crosslinking hydrogel material. Component A-nitrobenzyl phototrigger modified high-molecular derivatives are dissolved in a medium with biological compatibility in order to obtain a solution A; component B-primary amine, diamine, hydrazide, hydroxylamine high-molecular derivatives aredissolved in a medium with biological compatibility in order to obtain a solution B; the solution A and the solution B are uniformly mixed in order to obtain a hydrogel precursor solution; the hydrogel precursor solution is under light source irradiation, aldehyde group or ketone group generated by nitrobenzyl in the component A and primary amine, diamine, hydrazide, hydroxylamine groups in the component B are crosslinked in form of Schiff base in order to form a hydrogel. The invention also provides a kit for preparation of the hydrogel, and applications of the hydrogel to tissue engineering, regenerative medicine, 3D printing, and carriers of cells, proteins or drugs. The hydrogel precursor solution is sprayed or smeared on the surface of tissue in order to realize in situ gelation under light, and the product is especially suitable for postoperative wound enclosing and tissue fluid leakage sealing.

The invention relates to a photoinduced nitroso crosslinked hydrogel material and a preparation method and application thereof. The preparation method comprises the following steps of dissolving a macromolecular derivative which is modified by an o-nitrobenzyl photo trigger in a component A into a biocompatible medium, so as to obtain a solution A; uniformly mixing the solution A, or adding a solution B containing a component B, so as to obtain a hydrogel precursor solution; under the condition of using light source to radiate the hydrogel precursor solution, enabling the o-nitrobenzyl photo trigger in the component A to produce nitroso groups through photo-inducing, and enabling the nitroso group to generate dimerization crosslinking by self to form the hydrogel, or generate addition crosslinking with nucleophile or electrophile in the component B to form the hydrogel. The invention also provides a kit for preparing the hydrogel, and application of the hydrogel in tissue engineering,regeneration medicines, 3D (three-dimensional) printing or cell, protein or drug carriers. The photoinduced nitroso crosslinked hydrogel material has the advantages that the hydrogel precursor solution can be sprayed or smeared onto the surface of the tissue, so as to realize the in-situ gelling under the condition of light radiation; the photoinduced nitroso crosslinked hydrogel material is especially suitable for the post-operation wound sealing and the tissue liquid leakage blockage.

The present invention belongs to the field of inorganic advanced material technology, in the concrete, it relates to a kind of nano crystal large-diameter mesopore oxide material and its preparation method. Said mesopore oxide material is synthesized by using inorganic precursor and organic template agent molecules through a self-assembly process including organic solvent evaporation and induction treatment in the acidic environment, its space group structure is two-dimensional hexagonal structure, three-dimensional hexagonal structure and three-dimensional cubic structure, its pore diameter range is 1-18nm, BET specific surface area is 50-800 sq.m/g and its thermal stability is higher than 400 deg.C.

The invention discloses a hedgehog SiO2 hollow microsphere and preparation method thereof. Block polymer is taken as soft template; block polymer solution is added into organic solvent/water two-phase system, so as to form stable emulsion, co-guiding agent and silicon source are dissolved in organic solvent and mixed to be uniform, and the emulsion is added; under the conditions of faintly acid and alkalescence, silicon precursor is hydrolyzed and condensed; then drying and calcination subsequent treatment are carried out; and finally the hedgedog SiO2 hollow microsphere is obtained. The invention is easy to implement and is economic and practicable, the grain diameter distribution of the prepared hedgedog SiO2 hollow microsphere is uniform, and the cavity diameter and spinous density are adjustable.

The invention discloses a method for reversely preparing a cobaltates nanowire array with a spinel structure taking mesoporous silicon oxide materials as solid templates, which is characterized in that the templates are evenly dispersed into an organic solvent which is immiscible with water at first; then, the beforehand prepared metal nitrate water solution is added into the above dispersion system drop by drop under the stirring condition; after being evenly mixed, the mixture is placed in the air to cause the solvent to be volatilized to obtain dry powder; the metal nitrate is decomposed to generate cobaltates with a spinel structure under the restricted space action of the template pores; finally, the silicon oxide templates are removed by a sodium hydroxide solution to obtain the cobaltates nanowire array with ordered mesoporous and the spinel structure. The prepared material has the advantages of high crystallinity, large specific surface area and uniform aperture, and the composition is adjustable and the structure is controllable.

The invention belongs to fields of solar photothermal conversion, sea water desalinization and new materials and relates to a solar photothermal purification method of water based on corncob integralcarbon material. According to the principle, the natural structural feature of corncob is utilized, the corncob is carbonized at a certain temperature but not powdered, and the integral corncob-basedcarbon material is prepared and is utilized to perform solar photothermal evaporation of water; part of the corncob integral carbon material is vertically soaked in water to be purified, and the otherpart is vertically exposed in air; clean water is produced with water vapor under sunlight irradiation. The method herein is suitable for purifying water, including sea water, bitter salty water, high-fluorine water, industrial wastewater, domestic wastewater and the like. Agricultural product wastes and renewable clean energy, solar energy, are utilized herein to produce clean fresh water; the method herein is simple and efficient, low in carbon, green and free of pollution; the water purification method is provided herein.

The invention belongs to the technical field of material preparation and solar energy photocatalysis and especially provides a carbon nitride hollow sphere photocatalyst, a preparation method and an application thereof. In the invention, a thermal fluid is used as a reaction medium, so that by means of a solvent action of the fluid under a subcritical status, reaction activity of a precursor is increased, and growth of a product is directly controlled at a low temperature to prepare the hollow sphere granules. The method solves the dependency on a template agent in a template-calcination technology in the prior art, which has the problems that high temperature calcination and corrosive removal of the template may cause collapse of the hollow structure and the product is low in light absorption range. The method achieves self-polymerization of a triazine ring monomer into the carbon nitride hollow sphere photocatalyst under a mild condition. By regulating the reaction parameters, polymerization degree is effectively changed, thereby controlling the physical and chemical properties of the product.

The invention relates to a bimetallic cobalt-based core-shell material and a preparation method and application thereof. A core of the bimetallic cobalt-based core-shell material is a magnetic metal Co, and a shell of the bimetallic cobalt-based core-shell material is a non-magnetic metal Ag or Cu; a shape of the bimetallic cobalt-based core-shell material is fibrous or spherical, a fiber diameteris 1.3 to 36 micrometer, and a spherical diameter is 1 to 7.3 micrometer; an atomic ratio of Co to Cu is 0.25 to 21.6, and the atomic ratio of Co to Ag is 59.8 to 74.8; a saturation magnetization strength ranges from 62.2 to 159.9 emu/g<-1>. The bimetallic cobalt-based core-shell material adopts an in-situ metal replacement method and has a microwave absorption characteristic of broadband and high absorption, wherein an effective frequency band width of which the reflectivity is less than or equal to -10dB is 5.1-7.76GHz; a bandwidth less than or equal to -20dB is 2.32-16.0GHz; a maximum reflection loss ranges from -52.5 dB to -19.7 dB. The bimetallic cobalt-based core-shell material has the advantages of simple process, easy industrial popularization, excellent material performance and good application prospect in the fields of catalysis, electrode materials, microwave absorption, high-density magnetic recording materials, sensors and the like.

The invention discloses a preparation method of phosphorus and nitrogen contained acrylate and copolymer core-shell particles of the phosphorus and nitrogen contained acrylate. Phenylphosphonic dichloride, hydroxyethyl acrylate and diethylamine which are taken as raw materials react with trimethylamine as an acid binding agent in tetrahydrofuran at 0-5 DEG C, and phosphorus and nitrogen contained acrylate is prepared. The synthesis method is simple, and the cost is low. The phosphorus and nitrogen contained acrylate can be subjected to free-radical copolymerization with other acrylate monomers. The core-shell particles of the phosphorus and nitrogen contained acrylate are prepared with a core-shell emulsion polymerization method, the core-shell particles have the advantages of adjustable structure and composition, have certain flame retardancy on the premise that the structure of a core-shell impact modifier is not changed and are expected to be used for toughening flame retardant materials.

The invention relates to a carbon nanotube composite material, in particular to a ZnAl, namely layered double hydroxides/carbon nanotube composite material ZnAl-LDHs/CNTs with [Zn<2+>1-xAl<3+>x(OH)2](CO3<2->)x/2.nH2O/CNTs as a structural general formula. In the composite material, the layered double hydroxides are sheet shaped and evenly distributed on the surface of a carbon nanotube, and the grain size of the layered double hydroxides is between 10 and 40nm. The composite material is a good photocatalyst and can be used for photocatalytic degradation of dye molecules; and the catalytic efficiency for the photocatalytic degradation of methyl orange can reach between 60 and 90 percent.

The invention discloses a preparation method of a composite particle with a hairy structure on the surface. The preparation method comprises the following steps: 1) dispersing inorganic nanoparticlesin an organic solvent; and 2) adding an initiator and a monomer into the system in the step 1), and carrying out cationic polymerization on the monomer to generate polymer nanofibers on the surfaces of the inorganic nanoparticles, thereby obtaining the composite particles. According to the preparation method of the composite particle with the hairy structure on the surface, polymer nanofibers growon the surface of the particle in situ through a cation precipitation polymerization method by utilizing the quenching effect of functional groups on the surface of inorganic nanoparticles on cations. According to the method, the application range of the inorganic nanoparticles is wide, and the composition and the morphology of the polymer fibers can be controlled through reaction conditions.

The invention discloses a low-temperature carbon dioxide methanation catalyst and a preparation method thereof. The catalyst comprises an active component and a carrier, wherein the active component is Ni, and the carrier is alumina, zirconia or a composite carrier of alumina and zirconia, wherein the mass percentage of the active component Ni is 5-25wt%, and the balance is the carrier. The methodcomprises: dissolving aluminum nitrate, zirconium nitrate or a compound of the aluminum nitrate and the zirconium nitrate and nickel nitrate in deionized water to obtain a mixed solution, dropwise adding a precipitant into the obtained mixed solution, stirring to obtain a solid-liquid mixture,aging the obtained solid-liquid mixture, washing the aged solid-liquid mixture with distilled water untilthe aged solid-liquid mixture is neutral to obtain a solid sample, and finally, sequentially drying, roasting and treating the solid sample to obtain the Ni-based catalyst, namely the low-temperaturecarbon dioxide methanation catalyst. The methanation catalyst prepared by the invention has an effect obviously superior to that of the traditional Ni/Al2O3 catalyst, and is simple in preparation method, stable in performance and long in service life, excellent development prospect.

The invention discloses a magnetic heterostructure fiber, and a preparation method and application thereof. The fiber has a porous heterostructure, and the core of the fiber is ferroferric oxide assembled by nanocrystals and the surface of the fiber is coated by nickel nanocrystal; and the fiber length is 0.57-2.18 [mu]m, the diameter is 0.07-0.73 [mu]m, the nickel/iron atom ratio is 0:100-28.88:71.12, and the saturation magnetization is high (75.243-86.442emu/g). The fiber is prepared by using precipitation-precipitation transfer method-carbothermic reduction technology. The inventive method is simple in operation, good in controllability and repeatability, novel in formation mechanism, low in equipment requirements, low in cost and high in efficiency, and easy to promote industrial applications. The magnetic heterostructure fiber has the characteristics of porous structure, adjustable size and composition and strong magnetic responsiveness, and important application prospects in the fields of catalysts, electrode materials, magnetic recording materials, magnetic sensors, detection, microwave absorption, etc.