113results about How to "The preparation method is simple and safe" patented technology

The invention discloses a calcium alginate fiber and a preparation method thereof. The fiber is calcium alginate hydrogel with a porous structure, a rodlike structure or a rodlike and porous compound structure; the diameter of the fiber is 100-500mu m. According to the preparation method, on the basis of the action of hydrodynamics and by use of the chemical principle that sodium alginate reacts with calciumchloride to generate the calcium alginate hydrogel and the design of a microfluid device, sodium alginate solution and calciumchloride solution are mixed to generate gelation reaction; fibers with different structures and different sizes are generated by adjusting the flow velocity of internal-phase fluid. The preparation method disclosed by the invention has the advantages of simplicity, safety, lower cost and strong experimental repeatability; in the preparation process, a high-voltage electric field is not mentioned, so that the damage to cells is avoided and cell encapsulation can be realized. The prepared fiber structure has the advantages of uniformity, size controllability, good biocompatibility and broad application prospect; the prepared fiber structure can be directly applied to the fields of biomedicines such as cell culture and drug delivery.

The invention relates to a preparation method of nitrogen doped and graphene loaded Cu-Cu2O nanocomposites. Copper phthalocyanine is used for providing a nitrogen source and a copper source, and the high-heat treatment is performed on mixed powder of the copper phthalocyanine and oxidized graphene in an argon atmosphere, so as to prepare the nitrogen doped and graphene loaded Cu-Cu2O nanocomposites. In the prepared nitrogen doped and graphene loaded Cu-Cu2O nanocomposites, Cu-Cu2O nanoparticles are loaded on nitrogen doped graphene sheets. The preparation method provided by the invention has the advantages of safety and simplicity, the yield is high and the recurrence and the industrial production are easy. The nitrogen doped and graphene loaded Cu-Cu2O nanocomposites which are produced by adopting the preparation method have good application prospects and economic values in aspects of photocatalysis, oxygen catalysis, supercapacitors and the like.

The invention relates to the field of flexible wearable heating materials, in particular to a preparation method of a radiation-heatable MXene/polymer composite material. The preparation method comprises the following steps: carrying out surface hydroxylation treatment or polarity modification treatment on a polymer material, washing with deionized water, and drying to obtain a pretreated polymer material; and uniformly spraying an MXene solution on the pretreated polymer material, and drying to obtain the radiation-heatable MXene/polymer composite material. The preparation method is simple and safe, conditions are mild, and large-scale batch preparation can be achieved; the prepared MXene/polymer composite material has three heating modes of radiation heating, electric heating and light heating, the highest temperature in the radiation heating mode can reach 45.2 DEG C, the highest temperature in the electric heating mode can reach 85.0 DEG C, the highest temperature in the light heating mode can reach 90.0 DEG C, and the method has huge application value in the field of new-generation energy-saving heating flexible heat preservation fabrics or films.

The invention discloses a method for preparing WO3 nanocrystalline. The method comprises the following steps: firstly preparing a poly tungstic acid peroxide solution by adopting a peroxidation method, adding a non-ionic surfactant, giving fully play to a precursor by refluxing, and finally carrying out direct high temperature calcination on the prepared sol, thus a high quality WO3 nanocrystalline material is obtained. The invention has the advantages that: the preparation method is simple, the cost is low, the prepared WO3 nanocrystalline has high crystallization quality and good dispersibility, and the industrial production in batch can be realized. The WO3 nanocrystalline material prepared by the invention is a gas-sensitive material with high detection performance to low concentration acetone, can be developed to be a detector material for acetone and can be especially applied to a device for diagnosing diabetes by adopting a breathing pattern.

The invention provides alcohol acid ripple finish and a preparation method thereof. The alcohol acid ripple finish comprises, by weight, 50-60 parts of alcohol acid ripple resin (having solid content of 60+/-3wt%), 5-10 parts of polymerized oil pattern-adjustment resin, 2-3 parts of carbon black, 20-35 parts of light calcium, 0.5-1.5 parts of bentonite HFGEL-40A, 1-2.5 parts of lead naphthenate having the content of 10%, 2-3.5% of cobalt naphthenate having the content of 4%, 0.1-0.3 parts of an anti-skinning agent and 5-10 parts of toluene. The anti-skinning agent is methyl ethyl ketoxime, butyraldehyde oxime or cyclohexanone-oxime and is obtained by mixing. The film of the alcohol acid ripple finish has excellent characters, realizes a flexible change of ripple patterns according to user demands and can be prepared by a simple method.

The invention relates to the technical field of medicine, and particularly relates to a curcumin compound injection and an intravenous injection preparation thereof. The curcumin compound injection mainly comprises a curcumin compound, a solvent for injection and a small amount of pH regulator. The curcumin compound intravenous injection preparation is used only by mixing the curcumin compound injection and an emulsifier in a volume ratio of (1:5)-(1:250). After the curcumin compound injection and the emulsifier are mixed, the drug loading rate of the curcumin compound in the intravenous injection preparation is up to 1.5 mg/ml, and no crystal is separated out within 18 hours. The curcumin compound injection provided by the invention has a simple and safe preparation method and good stability, and is convenient for storage and transportation. The curcumin compound intravenous injection preparation has good stability due to the use of the emulsifier as a carrier solvent, and has no toxic and adverse effects. The invention solves the problem that the curcumin compound can not be prepared into the intravenous injection preparation and applied in clinics for a long period of time.

The invention discloses a preparation method of a polymer anion exchange membrane. The method comprises the following steps: 4,4'-difluoro benzophenone, hydroquinone with one or more methyl groups or a derivative of hydroquinone with one or more methyl groups, and alkali metal carbonate with a mass ratio of 1:1:1.1-1.2 are dissolved in a mixed solvent of N-methylpyrrolidone and toluene; the mixture is subjected to a reaction under high temperature, such that a polymer containing methyl group is obtained; the polymer with methyl group, bromosuccinimide and an initiator with a mass ratio of 1:0.5-0.8:0.01-0.015 are dissolved in chloroform; heating and reflux suction filtration are carried out; a mixture obtained after suction filtration is added into a precipitating agent, and precipitation is carried out, such that a brominated polymer is obtained; the brominated polymer is subjected to a quaternization treatment and is cast into a membrane; and the membrane is heated and dried, such that the polymer anion exchange membrane is obtained. The method is simple and highly efficient. The obtained polymer anion exchange membrane has high ion exchange capacity, high chemical stability, high thermal stability, and excellent mechanical properties.

The invention discloses a preparation method of a graphene-based photocatalytic material, which comprises the steps of preparing graphene oxide, synthesizing titanium dioxide/molybdenum disulfide/graphene composite hydrogel and crystallization of a catalyst; the raw materials comprise graphite powder, concentrated sulfuric acid, potassium permanganate, aqueous hydrogen peroxide solution, hydrochloric acid, anhydrous ethanol, deionized water, sodium molybdate, L-cysteine, titanium sulfate and glucose. The graphene-based photocatalyst prepared by the method has the advantages of uniform pore size, high crystallinity, large specific surface area, high separation efficiency of photogenerated carriers, and the preparation method is safe, simple and easy to operate.

The invention provides a preparation method of an MIL-125 loaded 1T-phase molybdenum sulfide composite photocatalyst. The preparation method comprises the following steps: preparing a black solution from ammonium molybdate and thiourea; washing with the black solution, and drying to obtain molybdenum sulfide powder; adding butyl titanate and 2-aminoterephthalic acid into a mixed solution of an N, N-dimethylformamide solution and methanol to obtain a mixed solution; carrying out hydrothermal reaction on the mixed solution to obtain a reacted solution; washing the reacted solution, and separating to obtain a precipitate; and drying the precipitate to obtain the MIL-125 loaded 1T-phase molybdenum sulfide composite photocatalyst. The invention also provides an application of the MIL-125 loaded 1T phase molybdenum sulfide composite photocatalyst. The preparation method of the composite photocatalyst provided by the invention is simple, the preparation method is economical and low in cost, and the prepared composite photocatalyst is relatively high in photocatalytic activity, is used for photocatalytic reduction of CO2 into ethanol, and has relatively high conversion capacity.

The invention relates to a preparation method of a BiOBrxI1-x/ZIF-8 composite photocatalyst. The preparation method comprises the following steps: carrying out solvothermal reaction on a mixed solution of soluble zinc salt, 2-methylimidazole and methanol; dissolving halide in ethylene glycol to obtain a solution A; mixing ethylene glycol and bismuth nitrate to obtain a solution B, and slowly adding the solution B into the solution A under magnetic stirring to obtain a bismuth oxyhalide source; dropwise adding deionized water into a mixed solution of an organic solvent, an acidic pH regulator and a bismuth oxyhalide source, and performing stirring to obtain a first solution; and concentrating and adding ZIF-8 powder to obtain the BiOBrxI1-x/ZIF-8 composite photocatalyst. The catalyst prepared by the invention can be recycled, and has no pollution to the environment; the preparation time is short and large-scale production can be achieved. In the research process, the condensed state physical subsidy of the ninth batch of key disciplines in Henan Province with the project number of 1333010223 is obtained.

The invention belongs to the field of materials, and more particularly relates to a ZnFe2O4 hollow sphere-RGO composite material and a preparation method thereof. The material comprises zinc ferrite hollow spheres and flaky graphene, wherein the zinc ferrite hollow spheres are attached to the surface of the flaky graphene. The preparation method comprises the following steps: (1) dissolving a zincsalt and a trivalent iron salt in an organic solvent, adding a graphene oxide dispersion to the organic solvent, and conducting stirring to obtain a mixed solution; (2) transferring the mixed solution to a stainless steel high pressure reactor lined with polytetrafluoroethylene, sealing the reactor for a reaction, and conducting natural cooling, centrifuging, washing and drying to obtain a precursor; and (3) carrying out heat treatment on the precursor in an inert atmosphere to obtain the ZnFe2O4 hollow sphere-RGO composite material. According to the invention, a zinc ferrite hollow sphere-reduced graphene oxide composite material is prepared by combining a simple one-step synthesis process with a high-temperature inert atmosphere heat treatment process; the material prepared by the preparation method disclosed by the invention has large specific surface area and improved electron mobility; and the preparation method is simple and safe, low in cost, and high in practicability.

The invention provides a preparation method of superfine silver powder for an electronic material. The preparation method comprises the following steps: a) preparing a reducer and a dispersing agent solution, b) preparing a reductive solution, c) dropwise adding for a reduction reaction, and d) treating reaction sediment. According to the preparation method of superfine silver powder for the electronic material, the preparation method is simple and safe, the efficiency is high, the cost is low, and the prepared superfine silver powder is high in purity, uniform in granularity, small in particle diameter, and easy to produce in large scale.

The invention relates to a preparation method of natural para aminobenzoic acid and a derivative of natural para aminobenzoic acid. Termitomyces albuminosus is cultured through liquid fermentation, a fermentation product is obtained, and then natural para aminobenzoic acid and the derivative of natural para aminobenzoic acid are separated and purified from the fermentation product. With the adoption of the preparation method of natural para aminobenzoic acid and the derivative of natural para aminobenzoic acid, natural para aminobenzoic acid and the derivative of natural para aminobenzoic acid can be prepared by the aid of the fungus termitomyces albuminosus through liquid fermentation, sources of raw materials of a culture medium are wide, the preparation method is simple, safe and environment-friendly, and industrial production is easy to realize.

The invention provides water-based alkyd antirust paint as well as a preparation method and application thereof, and belongs to the field of paint. The water-based antirust paint is prepared from the following components in percentage by weight: 0.1 to 1.0 percent of defoaming agent, 0.5 to 10.0 percent of dispersing agent, 20.0 to 60.0 percent of antirust pigment and filler, 0.5 to 20.0 percent of anti-settling agent, 10.0 to 30.0 percent of alkyd resin, 10.0 to 30.0 percent of acrylic emulsion, 0.5 to 10.0 percent of pH regulator, 1 to 10.0 percent of drier, 0.1 to 0.5 percent of antirust agent, 0.1 to 5.0 percent of anti-freezing agent, 0.1 to 10.0 percent of flatting agent, 0.1 to 0.5 percent of adhesion promoter, 0.1 to 5.0 percent of anticorrosive bactericide, 0.1 to 5.0 percent of rheological additive, 0.1 to 10.0 percent of coalescing agent and the balance of water. The alkyd antirust paint disclosed by the invention is good in water resistance and quick to dry.

The invention discloses a preparation method of a traditional Chinese medicine Chinese redbud bark smoking cessation solution. The preparation method comprises the steps that when traditional Chinese medicine (dried) Chinese redbud barks are leached with an edible 95% ethanol solution, the ratio of the gram weight number of the Chinese redbud barks to the milliliter number of the 95% ethanol solution is 1:1.3-1.9, and the leaching time is set at 80 h-120 h. The preparation method of the smoking cessation solution is sample, safe, good in smoking cessation effect, free of poison and pollution, low in cost, convenient to carry and use and suitable for all kinds of smokers for smoking cessation.