1130results about How to "The synthetic route is simple" patented technology

The invention relates to self-healing polyurethane resin containing disulfide bond and a preparation method thereof. The polyurethane resin comprises, by weight parts, 10-30 parts of polyether or polyester polyol, 3-20 parts of polyisocyanates, 1-10 parts of chain extender containing the disulfide bond, 0.001-1 part of organic tin or tertiary amine catalyst and 50-80 parts of organic solvent. The method for preparing the self-healing polyurethane resin containing the disulfide bond comprises the steps of weighing raw materials, stirring, heating and performing dehydration for the polyether or polyester polyol under vacuum conditions, lowering the temperature to 85 DEG C or below, adding the polyisocyanates and the organic tin or tertiary amine catalyst, reacting, lowering the temperature to 50 DEG C or below, adding the organic solvent and the chain extender containing the disulfide bond, reacting and performing vacuum defoamation to obtain the self-healing polyurethane resin. The self-healing polyurethane resin heals by itself under the heating or ultraviolet (UV) light conditions, the required conditions are mild, the healing speed is high, the effect is good, the preparation method is simple and easy to control, and raw materials are goods of commercialized production and are cheap and easy to obtain.

The invention relates to a self-repairing polyurethane hydrogel and a preparation method thereof. The polyurethane hydrogel comprises the following components in parts by mass: 10-30 parts of polyisocyanate, 30-50 parts of hydrophilic polyester polyol or hydrophilic polyether polyol, 10-50 parts of acrylamide monomer, 0.5-3 parts of chain extender, 3-10 parts of methacrylic acid functional monomer containing an UPy unit, 0.5-2 parts of catalyst and 0.5-3 parts of photoinitiator. The preparation method comprises the following steps of firstly preparing a hydrophilic polyurethane macromonomer terminated with an acrylic acid monomer and carrying out radical polymerization with the methacrylic acid functional monomer containing the UPy unit under the action of photo-initiation. According to the self-repairing polyurethane hydrogel, the self-repairing of the damage of the polyurethane hydrogel can be completed without need of any repairing agent or specific environmental requirements, the polyurethane hydrogel has the advantages of high repairing efficiency, high mechanical strength and low cost and the repeatedly repairing function can be achieved on the same site.

The invention belongs to the technical field of polymer material synthesis and preparation, relating to a star-shaped comb butadiene / styrene segmented copolymer, which is characterized in that the copolymer has the following structure: An-C, wherein A is the butadiene / styrene segmented copolymer, C is star-shaped seed tree coupler residue which is an epoxidation liquid star-shaped copolymer, n is branching degree which is larger or equal to 3, the number average molecular weight of the star-shaped comb segmented copolymer An-C is 5*10<4>-50*10<4>, the number average molecular weight of the segmented copolymer A is 1*10<4>-15*10<4>, the content of styrene is 55 percent to 85 percent (weight percent, same below), the content of butadiene is 15 percent to 45 percent, the content of 1, 2-structure is less than 30 percent (weight percent, which is counted by 100 percent of the total amount of monomer butadiene). The synthesis has the effect and benefit of simplifying the synthetic route of the star-shaped comb butadiene / styrene segmented copolymer, which can be widely applied to the preparation of the star-shaped comb butadiene / styrene segmented copolymer.

The invention discloses a self-repairing polyurethane coating and a preparation method thereof. The polyurethane coating comprises the following raw materials in parts by mass: 15-20 parts of polyisocyanates, 40-60 parts of hydrophilic polyester polyol or polyether polyol, 2-3 parts of a chain extender and 7-15 parts of methylcystein. The preparation method comprises the following steps: preparing a hydrophilic polyurethane prepolymer from hydrophilic polyester polyol or polyether polyol and the chain extender, and reacting the isocyanate group in the hydrophilic polyurethane prepolymer with methylcystein, so as to obtain a polyurethane material of which the tail end or the main chain contains 2-urea-4-pyrimidone units; spraying or coating the polyurethane material on the surface of a substrate, thereby obtaining the self-repairing polyurethane coating. The self-repairing of the self-repairing polyurethane coating disclosed by the invention can be completed without external repairing agent or requirements of special environment, the coating is good in transparency, high in strength, good in filming property, simple in process and low in cost, and the function of repeated repairing in same positions can be achieved.

The invention discloses a high-resilience self-repair high-polymer aquagel and a preparation method thereof. The high-resilience self-repair high-polymer aquagel is prepared from the following raw materials in parts by mass: 15-20 parts of polyisocyanate, 40-75 parts of hydrophilic polyester polyol or hydrophilic polyether glycol, 1-5 parts of acrylate monomer, 10-15 parts of acrylamide monomer, 0.5-2 parts of chain extender, 1-3 parts of surfactant, 0.1-1 part of alkyl acrylate monomer and 0.5-2 parts of catalyst. The preparation method comprises the following steps: preparing an acrylate-monomer-terminated hydrophilic polyurethane high-polymer monomer self-assembly and an alkyl acrylate micelle; and carrying out radical copolymerization with acrylamide monomer under the photoinitiation action. The obtained self-repair high-polymer aquagel can complete self repair on self damage without any repair agent or specific environment, and has excellent resilience and physical and mechanical properties.

The invention discloses a hydroxylated tung oil and an ester group-aminated preparation method, belonging to the technical field of organic chemosynthesis. In the method, under a certain condition, ester groups in the tung oil and diethanol amine are subjected to aminolysis reaction on the premise of reserving conjugated double bonds, thus the tung oil is hydroxylated to mainly produce a compound containing terminated hydroxyl and three conjugated double bonds. The structural formula of the compound is shown in the specification. The aminolysis reaction product plays an important role in developing and producing processes of leading the tung oil into waterborne polyurethane, not only can combine the advantages of the tung oil and the polyurethane, but also can improve the utilization ratio of tung oil resources as special local products in China and decrease the dependence on petroleum products; and simultaneously, the method has the advantages of simplicity, practicability, high conversion rate and convenience in industrialized production.

The invention belongs to the field of biological analysis and detection and relates to fluorescent probes for labelling and / or detecting lipid droplets in cells as well as preparation and applicationsof the fluorescent probes. The probes are synthesized with 4-bromo-1,8-naphthalic anhydride as an initial material and take 1,8-naphthalimide as a fluorophore, a C12 alkyl long chain as a specific lipid droplet positioning group and an N-containing group on the 4th site of a naphthalene ring as a fluorescence enhanced and stabilized group. The probes are simple to prepare and have high yield. Compared with existing Nile red and boron dipyrromethene lipid droplet fluorescent probes, the probes have high light stability and large stokes shift and are more suitable for fluorescence imaging. Theprobes have very important application value in cell labelling fluorescent imaging and biomedical fields.

The invention relates to a catalyst which uses the phosphor-phosphamide as ligand, which is the phosphor-phosphamide ligand metallic complex of chiral ferrocenyl bone, wherein, the metal is rhodium, ruthenium, iridium, platinum or palladium; and the mol rate between the ligand and the metal precursor is 1.1:1-2.2:1. The ligand is compounded from chiral ferrocenyl to intermediate compound via several reaction steps, to be processed condensation with phosphite ester chloridate to attain the phosphor-phosphamide ligand with different chiral centers. Said ligand has new structure, stable property, simple compounding method, and wider application to the catalyst, which has higher catalysis activity (TON reaches 10000) and higher spatial selectivity (ee reaches more than 99%) in catalyzing asymmetry hydrogenization of itaconic acid, etc.

The invention relates to a preparation method of a novel mesoporous material for absorbing heavy metal ions in wastewater. The preparation method comprises the following steps of: 1, preparing a template; 2, hydrolyzing silicon source and rare-earth salt solution so as to form sol-gel, and crystallizing; and 3, removing a template agent, so as to obtain a sample. According to the preparation method, the synthetic method, which is low in cost, low in toxicity, simple, convenient and fast, is adopted, and the template agent is recovered, so that the cost is reduced, the performance of the mesoporous material is optimized; a mesoporous molecular sieve is simple in synthetic route, low in cost, and high in adsorptive property respect to the special ions in the solutions. After the mesoporous material is applied to a heavy metal ion absorption experiment, the ion concentrations of Pb2+, Zn2+, Cu2+ and Pb2+ in the solution after treatment are lower than the national drinking water standard. The mesoporous material is high in absorbing efficiency for Ag+.

The invention discloses preparation of hydrophilic polymer and application thereof in detecting mercury ions based on the change of fluorescence and color, particularly a rhodamine B hydrazide grafted hydrophilic polymer probe applied to the detection of mercury ions in aqueous medium based on the change of fluorescence and color and a kit and test paper applied to the detection of the mercury ions by using the probe, belonging to the technical field of material preparation and heavy metal ion detection. The polymer containing a rhodamine chromophore is prepared by subjecting rhodamine B hydrazide and propylene oxide on the side chain of polyvinylpyrrolidone-glycidyl methacrylate which is a water-soluble polymer to ring-opening reaction, has good water solubility and can be applied to selectively detecting the mercury ions by using visual colorimetry and fluorescence detection. The probe realizes the high-sensitivity and high-selectivity rapid quantitative or semi-quantitative detection of the trace mercury ions in the aqueous medium, has a simple synthetic route, low cost and convenience of use, is applicable to amplified synthesis and actual production and has great application prospects in the field of medicine, biology and environmental science and the like.

The invention provides a preparation method for 5 beta-3 alpha, 7 alpha-dihydroxy-6 alpha-ethyl-cholanic acid. The method comprises the following steps: carrying out silanization on 5 beta-3 alpha-ethoxy carbonyloxy-7-carbonyl-methyl cholanate by silicon haloganide in an aprotic solvent in the presence of strong alkali, producing a mukaiyama aldol reaction, reducing 5 beta-3 alpha-ethoxy carbonyloxy-6-ethylidene-7-carbonyl-methyl cholanate by palladium carbon and hydrogen, and hydrolyzing to obtain 5 beta-3 alpha-hydroxy-6 alpha-ethyl-7-carbonyl-cholanic acid; finally, reducing 5 beta-3 alpha-hydroxy-6 alpha-ethyl-7-carbonyl-cholanic acid by sodium borohydride to obtain 6-ECDCA (6 alpha-ethyl-chenodeoxycholic acid). The raw materials adopted in the method are wide in source; only one-step siloxane protection is required, so that a process is simple; the product yield is high.

A substituted porphyrin-metal coordination compound is prepared by simulating the biologic enzyme catalyst, and can be used as the cathode catalyst of methanol fuel battery.

The invention provides a benzofuran derivative liquid crystal compound. The compound has high dielectricity and optical anisotropy, and a display using the compound has fast response speed. The invention further provides one or more liquid crystal compositions containing the compound, and a liquid crystal display element comprising the liquid crystal composition.

The invention discloses a bicolor Eu-MOFs / CDs fluorescent material as well as preparation and an application thereof. Europium ions, trimesic acid and carbon quantum dots are used as raw materials, and the bicolor fluorescent material is prepared through heat treatment in a solvent prepared by mixing N,N-dimethylformamide, distilled water and cyclohexanol. Under irradiation of ultraviolet lamps, the material can emit red fluorescence when dispersed in organic solvents and can emit blue fluorescent when dispersed in water, so that fluorescent colorimetric sensors for measuring water content in organic solvents can be prepared from the material, the prepared sensors are high in sensitivity, good in stability and low in cost and have higher population value and brighter application prospect.

The invention discloses a chiral tridentate PNN ligand and application of the same in asymmetric hydrogenation and similar reactions. The tridentate nitrogen phosphine ligand disclosed in the invention has been the first reported nitrogen phosphine ligand containing chiral oxazoline so far and has been successfully applied to high-efficiency and high-selectivity hydrogenation and similar reactions of ketone and imine salts. Compared with other ligand, the ligand provided by the invention is simpler in synthetic route, higher in yield and environment-friendlier; moreover, the metal complex of the ligand shows better selectivity and a higher turn-over number in asymmetric hydrogenation. An iridium complex of the chiral tridentate PNN ligand has successfully realized asymmetric reduction of beta-ketone ester into beta-alcohol ester (which is a raw material for synthesis of molecular drugs duloxetine and atomoxetine), asymmetric hydrogenation of alpha-hydroxyacetophenone into alpha-hydroxyphenylethyl alcohol and asymmetric hydrogenation of acetophenone into phenylethyl alcohol, which is of important significance to production of the medical industry.

The invention discloses a method for loading nano metal phosphide on porous carbon, and belongs to the technical field of nano material preparation. Using sugar as a carbon source, phosphate (phosphoric acid) and metal salts can form a uniform mixed system under certain conditions. After dehydration and carbonization, porous carbon is formed in situ, and then the metal is formed into phosphorus under high-temperature reducing gas heat treatment. phosphides to prepare porous carbon-supported transition metal phosphide materials. In the present invention, by changing the synthesis conditions such as raw material ratio, reaction time and heat treatment temperature, the loaded nanometer material with simultaneously controllable load capacity, particle size and composition can be obtained. The whole process has the advantages of simple operation, low cost, abundant and easy-to-obtain raw materials, etc., and has great application prospects in many aspects such as industrial catalysis, electrochemistry, and hydrodesulfurization and denitrification of oil products.

The invention belongs to the technical field of water quality purification and heavy metal removal, and relates to a method for preparing a magnetism biomass adsorbent and removing heavy metal. The method comprises the following steps of: crushing and screening the biomass, cleaning with deionized water and drying; adding the dried biomass into acetic acid solution, stirring uniformly, dissolving chitosan with another acetic acid solution to prepare uniform chitosan acetic acid solution, blending the two solution to be uniform, then adding magnetic powder and stirring continuously; pouring the mixed solution obtained from reaction into alkali liquor for solidification; and selecting the low-cost magnetism adsorbent with a magnet, washing to be neutral and drying. The magnetism biomass adsorbent is proportionally added into the solution for removing heavy metal. The preparation method of the magnetism biomass adsorbent is simple to operate, short in process flow and environment-friendly and controllable in the adsorption process.

The invention discloses a chemical method for preparing 5,6,4'-trihydroxyflavone-7-O-D-glucuronic acid to solve problems of unavailable raw materials, long synthetic route and low synthesis yield in the existing synthetic method. The method comprises a plurality of chemical reaction steps: first, taking 3,4,5-trimethoxy phenol and p-methoxy cinnamoyl chloride as raw materials to construct a chalcone structure by a Friedel-Crafts acylation reaction, and cycloetherifying to obtain a flavone parent substance; then protecting and selectively deprotecting phenolic hydroxyl of the flavone parent substance, and glycosylating 7-phenolic hydroxyl; and finally removing a protective group to obtain the target compound. The obtained product has a beta-steric configuration. The method can be used for preparing high-purity and high-quality 5,6,4'-trihydroxyflavone-7-O-D-glucuronic acid products.

The invention discloses a method for preparing grapheme through organic amine solvothermal method, which comprises the following steps: 1) adopting the solvothermal method to lead expanded graphite to react with organic amine or organic amine solvent to obtain the semi-discrete liquid of grapheme; 2) implementing ultrasonic dispersion and then implementing centrifugation on the semi-discrete liquid of grapheme obtained from the step 1), and then collecting supernate, thus obtaining the grapheme. The invention obtains the grapheme by taking solvent thermal spalling as a means. A scanning electron microscope, a transmission electron microscope, and an atomic force microscope are adopted to represent the topogram of the grapheme; a Raman spectrum and an X-ray photoelectron spectroscopy are used to represent the density of imperfection and oxidation situation of the grapheme. The result shows that the grapheme synthesized by the method of the invention has the advantages of small size, high quality, less defects, light oxidation degree, etc. besides, the method for preparing grapheme through organic amine solvothermal method also has the advantages of simple synthetic route, low cost, high concentration and uneasy accumulation of the synthesized discrete liquid of grapheme, and excellent application prospect on the aspect of discrete liquid of grapheme materials.

A benzimidazole ester compound, 2-ethoxy-1-(p-halophenyl) methyl-1H-benzimidazole-7-carboxylate-1-[[(cyclohexoxy)carbonyl] oxy] ethylester, its preparing process, and its application in preparing medicinal compound candesartan ester are disclosed.

The invention relates to a preparation method of high-density liquid hydrocarbon fuel. The method totally comprises two parts: (1) on a first catalyst bed layer of a fixed bed continuous reactor, cyclopentanone (furfural water phase selective hydrogenation products) takes a self aldol condensation (and hydrogenation) reaction under the catalysis effect of acid / alkali catalysts or metal doping solid alkali to obtain oxygen-containing organic compounds with the carbon number being 15 and 10; (2) on a second catalyst bed layer of the fixed bed continuous reactor, the products generated on the first catalyst bed layer take a further hydrodeoxygenation reaction under the conditions of low temperature and no solvent under the catalysis effect of load metal A / X type bifunctional catalysts to obtain polycyclic hydrocarbon fuel with the carbon number being 15 and 10. The high-density liquid fuel (C15 tri-cycloalkane: 0.917 g / cm<3>; C10 bi-cycloalkane: 0.866g / cm<3>) has the advantages that the energy carried by an aircraft can be effectively improved; the engine oil consumption rate is reduced; the requirements of high flight speed, great load and long emitting range can be met.

The invention relates to corrosion inhibitor for hydrogenation device with constituent as: 10-30% fat nitrogen-containing compound, 10-20% aromatic sulfur-containing compound, 0-25% organic acid esters, 15-70% aromatics, and 0-25% imidazoline derivative. A little this product can effective inhibiting corrosion and salt dirty without any negative effect to product property and successive process fit to high-concentration H2S-HCl-H2O acidic or H2S-HCl-NH3-H2O basic system. It can form dense monomolecular layer protection membrane on metal surface to prevent hydrogen embrittlement phenomenon and fit to heat exchanger, air cooler and others.

The invention relates to an organic fluorescent sensing material with high-sensitivity fluorescent response to several explosives, and a preparation method application of the organic fluorescent sensing material. The material is obtained by self-assembling one or various carbazole derivatives through pi-pi interaction. The organic fluorescent sensing material disclosed by the invention has a typical P type material characteristic and high luminous stability, is suitable for being used for performing fluorescence detection on the explosives, and is particularly very effective for the detection of trace explosives (the concentration is at the ng level).

The invention provides a preparation method of a water-dispersive ternary mixed-crystal nano titanium dioxide photocatalyst. The preparation method comprises the following steps of: adding a titanium precursor into an absolute alcohol solvent at a room temperature, and uniformly stirring to obtain a titanium precursor alcoholic solution; then adding an acid hydrolysis inhibitor into the obtained titanium precursor alcoholic solution, and uniformly stirring the acid hydrolysis inhibitor and the obtained titanium precursor alcoholic solution, thereby obtaining a mixed solution; adding alcohol aqueous solution into the obtained mixed solution, uniformly stirring the alcohol aqueous solution and the obtained mixed solution, and standing for 1-20 minutes, thereby obtaining a gel; performing solvent thermal reaction on the gel at a temperature of 140-200 DEG C for 2-24 hours, then naturally cooling the reactant mixture to room temperature, and performing centrifugalizing, washing, vacuum drying and grinding, thereby obtaining a target product. Due to adoption of synthesis process based on a one-pot method, the preparation method is high in productivity, low in energy consumption and free from pollution; the product can form a nano dispersion in water and has quite high catalytic activity on organic sewage under a condition of visible lights.

The invention provides a preparation method of 2-chloromethyl-3,4-dimethoxypyridine hydrochloride. The preparation method is characterized in that maltol is used as a raw material, and 2-chloromethyl-3,4-dimethoxypyridine hydrochloride is generated by methylation, ammonification, chlorination, oxidation, methoxy substitution, hydroxymethylation and secondary chlorination reaction in turn. According to the preparation method provided by the invention, synthesis route is simple and clear, and maltol is used as the raw material, thus cost is reduced, and the yield reaches above 75%.

The invention discloses a novel methylacryloyl-benzimidazole (sulfur) ketone derivative, a preparation method for the compound and an application of the compound serving as an antibacterial agent. The compound has the structure shown in the following general formula (I) in the specification, wherein R and Y in the general formula (I) have meanings as shown in the specification.

The invention discloses a fluorescent probe for identifying cysteine and glutathione. The structure of the probe is a chemical formula: the formula is shown in the description. The preparation methodof the fluorescent probe for identifying the cysteine and the glutathione comprises the following steps: S1, performing reaction by taking 3-carboxyl-4-chlorine-7-diethylamine coumarin and 3-hydroxyl-N-(2-ethyl morpholine)benzamide as raw materials to obtain an intermediate; and S2, performing reaction by taking the intermediate and p-nitrophenol as raw materials to obtain a probe. The fluorescentprobe can identify the cysteine and the glutathione from various kinds of amino acid and some common substances, has a lysosome targeted function at the same time, can directionally detect the cysteine and the glutathione in the lysosome, has good selectivity and high sensitivity on the cysteine and the glutathione, and has a good application prospect in detection and analysis of the cysteine andthe glutathione in environments or biological samples.

The invention discloses a method for preparing a supported nano-metal material through a microwave-assisted carbon template method, and belongs to the technical field of nano-material preparation. The method comprises the following steps: forming a homogeneous solution in water by virtue of saccharides, urea, a precursor of an oxide carrier, and metal salts, and uniformly distributing the metal salts in a mixed liquid; and after that, carbonizing the saccharides by virtue of microwave heating to obtain a carbon-coated oxide carrier and nano-metals, uniformly distributing metal active components in porous carbon simultaneously, then carrying out high-temperature treatment in air to obtain an oxide carrier-supported nano-metal oxide, and then carrying out high-temperature heat treatment under a reducing atmosphere to obtain a porous carbon-supported nano-metal oxide or a nano-metal material. According to the method disclosed by the invention, the supported nano-material with simultaneously-controllable supporting capacity, particle size, crystalline phase and composition can be obtained through changing synthesis conditions of raw material proportion, microwave time length, power and the like. The whole process has the advantages of being simple to operate, green and environment-friendly, low in cost and the like.

The invention discloses a carbon quantum dot sensor with copper ion and cysteine recognition functions, a preparation method and application thereof. The carbon quantum dot sensor is prepared by the following steps: taking citric acid and ethylene diamine as raw materials, adopting a microwave method to synthesize a carbon quantum dot containing carboxyl on the surface, then taking 2-bromoethylamine and 1,4,8,11-tetraazacyclotetradecane as surface functionalizing reagents, and utilizing a surface grafting technology. The carbon quantum dot sensor is good in dispersity in water, and can be used for double-selectivity fluorescence detection to the copper ion and cysteine. Compared with the existing detection technology, the carbon quantum dot sensor disclosed by the invention can detect trace of copper ion and cysteine in a pure water medium with high sensitivity and high selectivity, is simple in synthetic route, convenient to use, and suitable for large-scale synthesis and actual application in production, and has the enormous application prospect in the fields such as biology and environment detection.