31results about How to "Chemically reactive" patented technology

The invention provides a zeolite-sepiolite powder coating. The coating is characterized in that the zeolite-sepiolite powder coating is prepared from 10-40% of zeolite powder, 10-40% of sepiolite powder, 10-25% of titanium dioxide, 10-20% of dolomite powder, 3-10% of white carbon black, 3-10% of kaolin, 3-8% of ash calcium powder, 0.3-1% of cellulose ether and 0-10% of redispersible latex powder.A preparation method of the zeolite-sepiolite powder coating comprises the following steps: taking zeolite with highest molecular sieve representativeness, ion exchange property, adsorption and dispersion properties, catalytic property, chemical reactivity and reversible dehydration property as a main raw material, taking sepiolite with largest specific surface area of non-metallic minerals, special internal porous structure and acknowledged highest adsorption capacity as an auxiliary raw material, adding a plurality of additives and preparing a zeolite-sepiolite powder coating through scientific formulation; the technical effects of greatly improving the adsorption performance and the ion exchange performance, improving harmful materials such as formaldehyde, benzene and ammonia and the like, purifying air and eliminating peculiar smell can be achieved.

The invention discloses a formaldehyde eliminating agent and a preparation method thereof. The formaldehyde eliminating agent consists of the following raw materials in part by weight: 100 to 300 parts of water borne epoxy resin (solid), 200 to 1,000 parts of melamine, 100 to 1,000 parts of water, and 0.1 to 10 parts of stabilizing agent. The preparation method for the formaldehyde eliminating agent comprises the following steps of: 1) sequentially adding the raw materials into a reaction kettle according to the raw material proportion of claim 1 or 2 with stirring, controlling the heating temperature at 40 to 60 DEG C, fully stirring the raw materials uniformly, and regulating the pH to be between 5.0 and 5.5 by using acid; and 2) heating the raw materials to the temperature of between 75 and 80 DEG C, reacting for 30 minutes, regulating the pH value to be between 6.0 and 8.0 by using alkali, cooling the reaction product to the temperature of 30 DEG C, and discharging.

The invention discloses a preparation method of a high-strength heat-conducting film based on Kevlar nanofibers, which is characterized in that urea-functionalized boron nitride nanosheets and functionalized Kevlar nanofibers are used as a film material assembly, Boron nitride nanosheets / functionalized Kevlar nanofiber composite films were firstly obtained by self-assembly under reduced pressure and suction, and then the thermal conductivity and mechanical properties were improved by glutaraldehyde cross-linking to obtain boron nitride nanosheets / functionalized Kevlar composite films. Kevlar nanofiber composite film, that is, a thermally conductive film based on Kevlar nanofibers. The invention uses functionalized boron nitride nanosheets and surface-modified Kevlar nanofibers as assemblies, and realizes the chemical crosslinking structure of boron nitride nanosheets and Kevlar nanofibers through glutaraldehyde cross-linking. The tensile strength of the composite film is greatly improved, and the composite film has excellent thermal conductivity. The method is simple and effective, and the prepared high-strength thermally conductive film is expected to be used in energy, electronics and other fields.

The invention relates to a method for synthesizing a macromonomer, which belongs to the technical field of macromonomer preparation. The method uses a strong base and a compound containing double bonds and active hydrogen as an initiating system to initiate homopolymerization or copolymerization of vinyl monomers or cyclic monomers, and synthesize macromonomers containing terminal double bonds in one step. The polymerization reaction conditions of the present invention are mild, and the raw materials used have industrial products, which are suitable for industrial production, and the prepared macromonomer structure is rich, which not only has the physical characteristics of polymers, but also has chemical reactivity. Polymers, degradable polymers and nano-polymer particle materials are widely used.

The invention belongs to the technical field of graphene materials and in particular relates to micro-oxidized graphene and a preparation method thereof. The micro-oxidized graphene contains a small amount of active groups, is low in degree of oxidation, and has the oxygen element content of 1-10wt% and the bulk density of 0.01-0.1g / ml. The micro-oxidized graphene contains a proper amount of chemical reaction active group points, and meanwhile, a relatively complete graphene lattice structure is remained so that the micro-oxidized graphene has excellent dispersibility, special reactivity and excellent physical properties. The invention provides an industrial micro-oxidized graphene preparation route which is efficient, stable, economical, controllable and environment-friendly and the defects of uncontrollable graphene activation, great operation risks, serious environmental pollution, serious equipment corrosion, high cost investment and the like of a traditional acid oxidation method can be overcome. The micro-oxidized graphene prepared by use of the preparation method has extremely wide prospect in the fields of functional composites, coatings, ink, photoelectric materials, biological medicine and the like.

The invention relates to a 2,2'-dialkoxyl-4,4'-biphenyl dioctyl phthalate compound and a synthesizing method thereof. The compound has a general formula as the right structure, wherein, R respectively represents -CH3, -CH2CH3 or -CH(CH3)2. The invention has the advantages of available reaction material and mild reaction condition, and is suitable for scale industrial production.

This is a preparation of polytert-butyl methacrylic (PBMA) macromolecule monomer through atom transfer free radical polymerization (ATRP), belonging to macromolecule monomer preparation technology field. The invention provides the PBMA macromolecule monomer, including the styrene end-sealed one and crylic acid or methacrylic acid (MAA) end-sealed one. This kind of macromolecule monomer has the physical property and chemical reactive property, so it is very suitable for the structure design of macromolecule, and is widely used in the preparation of stem grafting macromolecule, segment embedded macromolecule and nanometer macromolecule grain material system. ATRP is a kind of active / controllable free radical polymerization., which has wide suitable monomers, simple operation, mild reaction condition, and can obtain high polymers of accurate structure and equably distributed molecular weights(Mw / Mn < 1.20). Applying the ATRP method can synthesize macromolecule monomers of uniformly distributed molecular weight.

The invention belongs to the field of polyurethane, and the invention provides a hydrophilic diisocyanate, which comprises at least one structural unit containing the following general formula: In the formula: SO 3 M is a sulfonate group, M is a K ion or a Na ion or an ammonium ion; n is 1-6; the hydrophilic diisocyanate is formed by reacting at least one hydrophilic chain extender with a diisocyanate. The sulfonate group in the hydrophilic diisocyanate structure of the present invention is a salt of strong acid and strong alkali, which has good hydrophilicity, and the isocyanate group at both ends retains the performance of the original diisocyanate, so it has the chemical reaction of diisocyanate characteristics; and using the hydrophilic diisocyanate of the present invention to prepare water-based polyurethane has changed the existing process and greatly simplifies the operation.

The invention discloses a PAA-TEOS-OA combined treatment-based finishing method for a polyester or polyamide hydrophobic fabric, and belongs to the technical field of functional textiles. A fabric is subjected to pretreatment by utilizing polyacrylic acid, so that the capability of the fabric in the aspect of reacting with a subsequent chemical reagent is improved, and a bridge function is achieved; tetraethyl orthosilicate is hydrolyzed and polycondensed under an acid or alkali condition, and particular matters are formed on the surface of the fabric, so that a function of roughening the fabric is achieved; long-chain alkane type octadecylamine can effectively reduce surface energy of the fabric, and meanwhile, the environment problem caused by perfluoronic compounds is avoided; in the finishing treatment, traditional soaking, rolling, baking and roasting processes are utilized, so that the homogeneity and the repeatability of products are good, and the cost is low; the polyacrylic acid, the tetraethyl orthosilicate and the octadecylamine, which are utilized in the whole finishing process, need to be utilized under weak acid and weak alkali conditions, and the baking temperature is low, so that the damage to the fabric is small; the finishing method can be applied to finishing a hydrophobic function of the polyester or polyamide fabric.

The invention discloses a urea resin and a preparation method thereof. The urea resin additive comprises the following raw materials in parts by weight: 100-300 parts of waterborne epoxy resin (solid), 100-1000 parts of urea, 50-1000 parts of water and 0.1-10 parts of stabilizing agent. The preparation method comprises the following steps: 1) adding the raw materials to a reaction kettle in sequence according to the proportion in claim 1 or 2, beginning stirring when the raw materials are added, raising the temperature and controlling the temperature at 40-60 DEG C, fully stirring the raw materials until the raw materials are uniform and regulating the pH value of the reaction liquid to be 5.0-5.5 with acid; and 2) raising the temperature to 70-72 DEG C and reacting for 30 minutes, regulating the pH value of the reaction liquid to be 6.0-8.0 with alkali, lowering the temperature to 30 DEG C and discharging the material.

The invention discloses a method for reinforcing autoclaved aerated concrete by using an external reinforcing agent. The method comprises the following steps of: cleaning the autoclaved aerated concrete, then totally permeating the inorganic reinforcing agent into the dried to constant-weight autoclaved aerated concrete in a mode of impregnation, spraying or brushing, and naturally airing the autoclaved aerated concrete at room temperature. The external inorganic reinforcing agent consists of 10 to 30 mass percent of aqueous solution of silicate and water-soluble film forming agent, and the water-soluble film forming agent accounts for 2 to 6 percent of the total weight of the inorganic reinforcing agent. By reasonably selecting the reinforcing agent and controlling the permeating time ofthe two-component reinforcing agent, the dry density of the reinforced aerated concrete is changed little, and pores and heat insulation performance are changed little. The aerated concrete reinforced by adopting the method has high strength and good water resistance, and can keep original properties of light weight and heat insulation. The reinforcing method does not need to change the formula and the preparation process of the original autoclaved aerated concrete, so the method is simple and feasible.

The invention relates to the technical field of biomedical materials, in particular to a porous composite bone cement and a preparation method thereof. The porous composite bone cement is mainly composed of powder and liquid. The ratio of powder to liquid is 2:1 g / mL. The powder is mainly composed of the following raw materials by mass percentage: methacrylic acid polymerization 29.5-84% of biodegradable materials, 10-40% of degradable biological materials, 5-30% of barium sulfate, 0.01-0.5% of benzoyl peroxide; the liquid mainly consists of the following raw materials by mass: methyl methacrylate 93 -99.45%, N,N-dimethyl-p-toluidine 0.5-5%, hydroquinone 0.05-2%. The invention solves the problems of low interfacial bonding force between traditional bone cement and autologous bone, inability of bone cells to grow, and the influence of residual reactants of pore-forming agent after the current porous bone cement is solidified on the mechanical properties and biocompatibility of bone cement.