2429 results about "Addition reaction" patented technology

The invention relates to the technical field of fabrics, and discloses a preparation method of an anti-wrinkle comfortable fabric, which comprises the following steps: by taking alkyl diamine, acrylonitrile, gamma-chloropropyl methyl dimethoxy silane and the like as raw materials, carrying out addition reaction, hydrolysis reaction and quaternization reaction to obtain polycarboxyl disilane gemini quaternary ammonium salt; octamethylcyclotetrasiloxane, polycarboxyl disilane gemini quaternary ammonium salt and the like are used as raw materials, quaternary ammonium salt modified polysiloxane is obtained through base catalysis copolymerization, then the quaternary ammonium salt modified polysiloxane is emulsified and prepared into finishing liquid, pure cotton fabric is soaked in the finishing liquid, and the anti-wrinkle comfortable fabric is obtained through two-dipping and two-rolling finishing. The crease resistance of the fabric is improved by utilizing a large number of amino groups and carboxyl groups contained in the finishing liquid, and the antibacterial property of the fabric is improved by utilizing a quaternary ammonium salt structure contained in the finishing liquid. Experiments prove that the prepared fabric has good crease-resistant comfort performance and antibacterial performance.

The invention discloses an alpha, omega-diiodo perfluoroalkane derivative, an alpha, omega-diiodo ethyl perfluoroalkane derivative as well as a preparation method and application of the alpha, omega-diiodo perfluoroalkane derivative and the alpha, omega-diiodo ethyl perfluoroalkane derivative. According to the method, alpha, omega-diiodo perfluoroalkane is taken as a raw material, and the alpha, omega-diiodo perfluoroalkane and ethylene are subjected to free radical addition reaction under the action of an initiator and a solvent to prepare the alpha, omega-diiodo ethyl perfluoroalkane. The alpha, omega-diiodoethyl perfluoroalkane and alkali are subjected to a one-molecule and / or two-molecule hydrogen iodide hydride elimination reaction, and alpha, omega-iodoethyl vinyl perfluoroalkane and / or alpha, omega-divinyl perfluoroalkane are / is generated. The method is simple and convenient to operate, the raw material utilization rate and the target product yield are high, the preparation cost is effectively reduced, and the industrial production requirement is met. The alpha, omega-diiodo perfluoroalkane derivative or alpha, omega-diiodo ethyl perfluoroalkane derivative prepared by the method disclosed by the invention can be used as a vulcanization point monomer for preparing peroxide vulcanized fluororubber, and compared with common rubber, the rubber has more excellent compression deformation performance, strength and medium resistance and has a wide application prospect.

The invention relates to Omarlliptin, in particular to a novel method for preparing Istradafylline, and relates to a preparation method of Istradafylline, in particular to a preparation method of Istradafylline. The method comprises the following steps: carrying out coupling reaction on a compound Ia and TMS acetylene to obtain an intermediate Ib; carrying out bromination reaction on the intermediate Ic under the action of NBS (N-bromosuccinimide) to obtain an intermediate Id; carrying out substitution reaction on the intermediate Id and tert-butyl carbamate under the action of potassium tert-butoxide to obtain an intermediate Ie; reacting the intermediate Ie with paraformaldehyde to obtain an intermediate If; carrying out cycloaddition reaction on the intermediate If and the intermediate Ib to obtain a key intermediate Ig; carrying out asymmetric catalytic hydrogenation reduction on the intermediate Ig to obtain an intermediate Ih; and removing a protecting group from the intermediate Ih in a hydrochloric acid and ethyl acetate system to obtain a final product. The method is short in route, simple and convenient to operate, mild in condition, high in reaction yield, environment-friendly and easy for industrial production, and dangerous and highly toxic products are prevented from being used and hazardous chemicals are supervised. # imgabs0 #

The present invention uses commercially available 3-aminopropylsilane coupling agent, diallylamino polyether acrylate, and an alkylating agent, or γ-propanesultone, or γ-butyrolactone as raw materials, and through an aza-Michael addition reaction and a quaternization reaction, a multifunctional silane coupling agent containing one or more quaternary ammonium cations, or sulfobetaine, or carboxybetaine in its molecular structure is prepared, which is used for the surface modification of bioactive glass, and the bioactivity, antibacterial and antifungal properties, and hydrophilicity enhancement effects after the surface modification of bioactive glass are obtained.

The invention belongs to the technical field of flame-retardant materials, and particularly relates to preparation of a phosphorus, nitrogen and silicon macromolecular flame retardant and application of the phosphorus, nitrogen and silicon macromolecular flame retardant in epoxy resin. The preparation method comprises the following steps: firstly, carrying out substitution reaction on chlorosilane and syringaldehyde or vanillic aldehyde to synthesize a silicon-containing intermediate, then carrying out Schiff base reaction on the silicon-containing intermediate and an amine compound, and finally carrying out addition reaction on the silicon-containing intermediate and a phosphorus-containing compound to prepare the phosphorus, nitrogen and silicon macromolecular flame retardant. The flame retardant has a good flame-retardant effect, can be used for preparing flame-retardant epoxy resin, can effectively improve the limit oxygen index and the vertical combustion grade of the epoxy resin, and can endow the epoxy resin with good transparency and molten drop resistance.

The invention belongs to the technical field of organic electro-oxidation electrode materials, and particularly relates to a fullerene modified transition metal hydroxide nano array material as well as a preparation method and application thereof. A transition metal hydroxide nano array grows in situ on a current collector through solvothermal reaction, surface amino modification is achieved by means of grafting of a silane coupling agent with amino, and finally the transition metal hydroxide nano array material with the surface modified by fullerene is obtained through addition reaction of amino and fullerene carbon-carbon double bonds. The strong electron-withdrawing capability of the fullerene is beneficial to optimizing the surface electron structure of the material, so that the intrinsic catalytic activity is improved; meanwhile, fullerene can promote adsorption and enrichment of an organic substrate on the surface of the material through a conjugated pi bond, a hydrophobic effect and the like, so that the mass transfer efficiency is improved. Benefited from the lifting mechanism, the obtained nano array material has the advantages of high electrocatalytic activity and high mass transfer efficiency, and can be widely applied to a series of organic electrooxidation reactions.

The invention belongs to the technical field of organic materials, and particularly relates to a foaming organic silicon pressure-sensitive adhesive and a preparation method thereof.The foaming organic silicon pressure-sensitive adhesive is characterized in that vinyl and a silicon-hydrogen bond of hydrogen-containing silicone oil are subjected to an addition reaction to form a compact cross-linked net structure, a hydroxyl nanometer reinforcing agent is added to react with the silicon-hydrogen bond to generate hydrogen, and microbubbles are formed in the net structure; cavities in the net-shaped structure are enlarged, and meanwhile, the strength of the net-shaped structure is enhanced. The pressure-sensitive adhesive for the display module has the beneficial effects that the adhesive film thickness of the pressure-sensitive adhesive for the display module is further reduced, and the buffer performance requirement in the prior art can still be met; the foaming organic silicon pressure-sensitive adhesive provided by the invention provides good buffering performance by virtue of the micropore structure and the cross-linked network structure, and when an OLED screen is subjected to impact force, the micropore structure and a cavity of the cross-linked network structure are deformed, so that the impact force is dispersed, and the OLED screen is prevented from being seriously deformed and damaged.

A method for visible light-mediated chemical modification of a polypeptide or protein based on cysteine includes the following steps: allowing a cysteine residue on a cysteine-containing oligopeptide, polypeptide, or protein to undergo a reaction with an activating reagent to generate a free radical precursor in situ; and subjecting the free radical precursor to desulfurization under photocatalytic condition, and allowing the generated free radical intermediate to undergo an addition reaction with an olefin or an alkyne, such that sulfhydryl removal and carbon-carbon bond construction are achieved to produce a chemical modification product of the polypeptide and protein. The method cleverly avoids the influence on the chiral center, and thus the chirality of the amino acid residue can be retained. The method is conducive to well avoiding the occurrence of side reactions, and thus the efficiency of the entire conversion is very high.

The invention discloses a preparation method of an FSP1 inhibitor FSEN3, which comprises the following steps: by taking 4-methoxybenzoyl hydrazine and allyl isothiocyanate as raw materials, forming a thiourea intermediate through nucleophilic addition reaction, carrying out cyclization reaction under the action of alkali, then reacting with liquid bromine to construct a thiazolotriazole skeleton, and finally preparing the FSP1 inhibitor FSEN3. And then carrying out substitution reaction with indoline to obtain a target product FSEN3 as shown in a formula (I). The total synthesis method provided by the invention is mild in condition, simple and convenient to operate and high in total yield. # imgabs0 #

The invention discloses an adhesive containing epoxy-terminated polyurethane epoxy resin as well as a preparation method and application of the adhesive. The adhesive comprises the following components in parts by weight: 10-15 parts of epoxy resin, 70-75 parts of epoxy-terminated polyurethane epoxy resin, 19-21 parts of an amine curing agent and 8-15 parts of heat-conducting filler, wherein the epoxy-terminated polyurethane epoxy resin is obtained by reacting a polyurethane prepolymer and epoxy resin, NCO of the polyurethane prepolymer and hydroxyl of the epoxy resin are subjected to an addition reaction, and after the reaction is finished, NCO of a system is eliminated by adopting a small-molecule epoxy compound; the polyurethane prepolymer is obtained by reaction of isocyanate and polyether polyol with flexible chain segments. According to the adhesive, the curing heat release peak value is reduced, the toughness is improved, meanwhile, the high strength is kept, the foaming problem is avoided, the defects that a traditional epoxy adhesive is high in heat release and poor in toughness are overcome, and the adhesive is suitable for the fields such as aerospace and electronic and electric appliances which have strict performance requirements.

The present invention provides a multifunctional silane coupling agent, which is prepared from commercially available 3-aminopropylsilane coupling agent, acryloxy polyetheramine, and one of an alkylating agent, polyether sulfonate, γ-propane sultone or γ-butyrolactone through Michael addition reaction and quaternization reaction. The multifunctional silane coupling agent is a new variety carrying zwitterions, quaternary ammonium cations and polyether chains, enriching the functions and application scope of silane coupling agents. It can endow some modified materials with surface hydrophilicity, conductivity, antibacterial, antifogging, antifouling, biocompatibility, anticoagulant and wet lubrication properties, etc. at the same time.

Provided is a curing agent for epoxy resins which comprises an aromatic amine compound (A-1) and one or more aromatic amine adducts (A-2) that are products of reaction between an aromatic amine compound and a reactive compound having a functional group capable of reacting with the aromatic amine compound, wherein the aromatic amine adducts (A-2) include an aromatic amine adduct (A-2-1) formed by uniting one molecule of the reactive compound to one molecule of the aromatic amine compound (A-1) by addition reaction. The ratio of the aromatic amine compound to the aromatic amine adduct (A-2-1), (A-1) / (A-2-1), obtained by analysis by liquid chromatography (UV detector), is 0.50-2.00.

The invention relates to a method for improving the quality of a perovskite thin film, the perovskite thin film and a solar cell, and the method specifically comprises the following steps: introducing aromatic amine or N-containing heterocyclic ring and alpha, beta-unsaturated aldehyde ketone additive into a precursor solution of organic halide, carrying out in-situ Michael addition reaction on the additive, firstly preparing solution components through the additive, and then preparing the organic halide precursor solution; side reaction in the solution is avoided, the irreversible degradation process of the precursor solution is effectively inhibited, and the storage stability of the precursor solution of the organic halide is improved; besides, through an additive and an in-situ Michael addition reaction, the release rate of organic halide is effectively delayed, rapid reaction between the organic halide and metal halide is inhibited, the perovskite nucleation / crystallization process is regulated and controlled, and reaction product functional groups finally reserved on the surface / grain boundary of the thin film can effectively passivate uncoordinated lead ions or iodine defects, so that the performance of the thin film is improved. Therefore, the high-quality perovskite thin film and a corresponding device are obtained.

The invention discloses a polyamine type porous polymer as well as a preparation method and application thereof, and belongs to the technical field of synthesis of porous organic polymers. The specific method comprises the following steps: dispersing beta-mercaptoethylamine, a photoinitiator and a porous framework polymer with carbon-carbon double bond connection in a polar organic solvent; under the ultraviolet light initiation condition, the photoinitiator excites beta-mercaptoethylamine to generate sulfydryl free radicals, and the sulfydryl free radicals and the porous framework polymer with carbon-carbon double bond connection are subjected to an addition reaction; and washing and drying the product after the addition reaction to obtain the amino-modified polyamine porous polymer. The preparation method provided by the invention is rapid in reaction, extremely high in reactant utilization rate and simple in post-treatment, and the prepared polyamine type porous polymer has rich adsorption sites, good stability and excellent carbon dioxide adsorption performance, and can be applied to the field of carbon capture and the like.

The invention relates to the technical field of organic polymer adhesives, and particularly discloses a modified castor oil-based polyurethane adhesive as well as a preparation method and application thereof. The adhesive comprises two components, and the component A comprises the following components in parts by weight: 30.0-50.0 parts of modified castor oil and 0.0-30.0 parts of refined castor oil; the component B is prepared from the following components in parts by weight: 30.0 to 50.0 parts of polyisocyanate or a polyisocyanate modifier and 0.00 to 0.05 part of a dewatering agent; the modified castor oil is prepared from refined castor oil and cysteamine through a sulfydryl-alkene addition reaction. Amido of the modified castor oil is alkalescent, and the reaction speed of the modified castor oil and isocyanate groups is high; hydrogen bonds are easily generated between urea bonds generated by the reaction of amino groups and isocyanate groups, so that the adhesive is endowed with thixotropy and high strength. The adhesive disclosed by the invention is simple in composition, high in reaction speed and good in thixotropy and bonding strength.

The invention belongs to the field of flotation, and particularly relates to a lithium-containing china clay ore flotation method which comprises the following steps: carrying out flotation on to-be-separated minerals of lithium-containing china clay ore in a flotation reagent containing a collecting agent to obtain lithium china clay ore concentrate; the collecting agent is characterized in that the collecting agent is a compound shown in the formula 1 # imgabs0 #; and / or a product obtained by carrying out an addition reaction on a formula 2 (R-NH2) and a formula 3 # imgabs1 # in advance and then carrying out a saponification reaction with an alkali. According to the collecting agent for the lithium china clay ore, the component shown in the formula 1 is innovatively adopted as the collecting agent for the lithium china clay ore, in this way, on the basis of intermolecular coupling of beta-NH-and-COOM, the collecting agent can accidentally adapt to the surface characteristics of target minerals of the lithium china clay ore, high-selectivity collecting can be achieved, and effective collecting under the low-temperature and mild conditions can be achieved.

The invention provides a method for activating Michael addition reaction by using a carbon-hydrogen bond of heterocyclic carboxylic acid, and belongs to the technical field of chemical synthesis. The method comprises the following steps: carrying out Michael addition reaction on heterocyclic carboxylic acid and nitroindole under the action of a catalytic system; the catalytic system comprises a catalyst and a cocatalyst, the catalyst is at least one of [Ru (p-cymene) Cl2] 2, RuCl3. 3H2O, RuH2 (CO) (PPh3) 3, RuH2 (PPh3) 3 and Ru3 (CO) 12, and the cocatalyst is at least one of AgSbF6, AgNTf2, Cu (OAc) 2, Zn (OAc) 2, KPF6 and NaPF6. The synthesis method of the aryl heterocyclic derivative is developed and enriched, a valuable new strategy is provided for constructing organic molecules with various structures, and the aryl heterocyclic derivative has important academic value and practical significance.

The invention discloses a sgRNA-based method for modifying and regulating gene editing, which comprises the following steps: carrying out POC acylation modification on a 2 '-OH site of sgRNA to introduce an alkynyl marker to obtain sgRNA with alkynyl; the sgRNA with alkynyl and azide are subjected to copper-catalyzed azide-alkynyl cycloaddition reaction under the action of a copper catalytic reagent to form a stable chemical cross-linked structure, so that the activity of the sgRNA is quickly closed and adjusted. According to the method, alkynyl is introduced to sgRNA and is subjected to a CuAAC reaction with multi-azide to form stable crosslinking, so that the activity of the CRISPR-Cas9 system is accurately controlled. The innovative method not only can effectively control the gene editing activity on the basis of not destroying the original structure and function of RNA, but also can significantly improve the target specificity of the CRISPR system and reduce the risk of genome damage caused by non-specific cleavage.

The invention relates to the technical field of in-vitro diagnostic kits, in particular to carboxyl polystyrene microspheres, a preparation method and application of the carboxyl polystyrene microspheres in a kit for quantitatively detecting MxA. The preparation method of the carboxyl polystyrene microspheres comprises the steps that firstly, polystyrene microspheres with the surface rich in aldehyde groups are prepared through a soap-free emulsion polymerization method; then carrying out a Schiff alkali reaction with 2-aminoethyl methacrylate hydrochloride to carry out double bond modification on the surface of the microsphere, and meanwhile, improving the hydrophilicity of the microsphere by an ester group and an imino group; and finally, carrying out sulfydryl-double bond addition reaction on the polystyrene microspheres and mercaptosuccinic acid to generate the polystyrene microspheres rich in carboxyl on the surfaces. The carboxyl polystyrene microspheres prepared by the invention can improve the binding efficiency of latex and an MxA antibody, so that the detection sensitivity is improved, the purpose of high-sensitivity quantitative detection of MxA protein can be achieved, and the detection time is greatly shortened.

The invention belongs to the technical field of high polymer materials, and provides a high-flame-retardance degradable bio-based high polymer material and a preparation method thereof. Based on a degradable bio-based material polylactic acid, a bio-based flame retardant is introduced to realize the efficient flame retardant property of the material, and the preparation method comprises the following steps: firstly, carrying out esterification reaction on L-lactic acid and methacrylic acid under the action of an acid catalyst to obtain methacrylate lactate; and then reacting with 2-(2-ethoxyethoxy) ethanol to generate an ester compound with a long-chain structure and an unsaturated group. Then, a flame retardant containing a phosphaphenanthrene group and an ester compound are subjected to an addition reaction to prepare a bio-based flame retardant with a flame-retardant effect, so that the material has a relatively good carbonization effect and a relatively good capability of inhibiting flame spreading during combustion; polylactic acid, the bio-based flame retardant, the antioxidant, the lubricant, the ultraviolet light absorber and the modified compatilizer are mixed, and finally the biodegradable bio-based high polymer material with excellent flame retardance is obtained.

The invention belongs to the field of fine chemical engineering, and particularly relates to an N-heterocyclic carbene complex catalyst and application of the N-heterocyclic carbene complex catalyst in pipelined continuous synthesis of a silane coupling agent. The invention provides an N-heterocyclic carbene complex catalyst, which comprises a ligand and an active component, the ligand is an N-heterocyclic carbene ligand, and the active component is a transition metal; the molar ratio of the N-heterocyclic carbene ligand to the transition metal is 1: 1. The invention also provides a method for pipelined continuous synthesis of the silane coupling agent, which comprises the following steps: carrying out homogeneous hydrosilylation reaction in a pipelined reactor by taking hydrogen-containing silane and unsaturated hydrocarbon as raw materials in the presence of an N-heterocyclic carbene complex catalyst to obtain the silane coupling agent. The spatial configuration and the electronic property of the N-heterocyclic carbene ligand precursor are designed and regulated, so that the N-heterocyclic carbene ligand precursor is matched with transition metal, and the N-heterocyclic carbene ligand precursor can be applied to hydrosilylation reaction.

The invention relates to the technical field of PC resin flexibilizers, and discloses a shell-core structure styrene-acrylic resin modified organic silicon elastomer flexibilizer as well as a preparation method and application thereof in order to solve the problems that an organic silicon material and PC resin are poor in intersolubility, a traditional flexibilizer is poor in low-temperature toughening performance and the like. Comprising the following steps: uniformly mixing hydrogen-containing silicone oil, vinyl silicone oil, a third alkenyl functional component and a catalyst, and pre-emulsifying under the action of a surfactant and a thickener to obtain an organic silicon pre-emulsion SiE; uniformly mixing an alkenyl phenyl compound, acrylate and / or a cross-linking agent, adding a molecular weight regulator and an oil-soluble initiator, and pre-emulsifying under the action of a surfactant and water to obtain a styrene-acrylic pre-emulsion SAE; the preparation method comprises the following steps: firstly, preparing an organic silicon pre-emulsion, then heating the organic silicon pre-emulsion to carry out a water-phase hydrosilylation addition reaction, then dropwise adding the styrene-acrylic pre-emulsion to carry out suspension emulsion copolymerization, and then demulsifying and drying to obtain the styrene-acrylic resin modified organic silicon elastomer toughening agent with the core-shell structure.

The invention relates to a perovskite photovoltaic cell high-transmittance low-scattering coating material and a preparation method thereof, and belongs to the technical field of photovoltaic cells. The coating material is prepared from the following components in percentage by weight: 7.2 to 8.5 percent of PMMA (Polymethyl Methacrylate) resin, 0.17 to 0.22 percent of modified nano titanium dioxide, 0.09 to 0.11 percent of flatting agent, 0.03 to 0.04 percent of defoaming agent and the balance of solvent, the modified nano titanium dioxide is prepared into an intermediate through addition reaction of triallylamine and mercaptoethanol, and then a modifier with a network molecular structure is formed through substitution reaction of trifluoropropyl trichlorosilane and hydroxyl at the end part of an intermediate molecule; a thioether chain segment in a modifier molecule and similar nitrogen and oxygen elements form a strong chelation effect to coat the nano titanium dioxide; the introduction of the modified nano titanium dioxide makes up the problem of light transmission reduction caused by traditional titanium dioxide reinforcement.

The invention discloses a sodium-ion battery electrolyte with high cycle performance and a preparation method thereof, and the preparation method comprises the following steps: dissolving a sodium salt in an organic solvent, and mixing to obtain a sodium salt solution; the method comprises the following steps: adding a film-forming agent, a flame retardant and an additive into a sodium salt solution, and uniformly mixing to obtain the electrolyte, the additive is obtained by carrying out amino-propylene addition reaction on tri-n-butyl (1-propenyl) tin and 2, 3, 5, 6-tetra (amino) p-benzoquinone, and then carrying out sulfydryl-propylene addition reaction on the obtained product and 1, 2-disulfydryl-o-carborane. By optimizing the composition and the preparation process of the electrolyte, the obtained sodium-ion battery electrolyte shows excellent stability in multiple cycle tests, the capacity retention ratio is remarkably improved, and the capacity attenuation is lower than 5% when the cycle index reaches 1000 or above. The electrolyte also has good low-temperature performance and thermal stability, and can normally work in a wide temperature range of-20 DEG C to 60 DEG C.

The invention relates to a low-smoke halogen-free flame-retardant plastic and a preparation method thereof, and belongs to the technical field of flame-retardant high polymer materials. The flame-retardant plastic is prepared from the following components: 12 to 17 weight percent of magnesium hydroxide superfine powder, 4.5 to 6.2 weight percent of modified flame retardant, 5 to 7 weight percent of flexibilizer, 0.9 to 1.2 weight percent of lubricant, 0.3 to 0.4 weight percent of antioxidant and the balance of PBT (Polybutylene Terephthalate) resin, the modified flame retardant is prepared by the following steps: reacting pentaerythritol with phosphorus oxychloride to prepare hydroxyl-containing polyhedral oligomeric phosphate, esterifying acryloyl chloride and the hydroxyl of the polyhedral oligomeric phosphate to prepare a monoester intermediate, and finally performing click addition on sulfydryl of pentaerythritol tetramercaptoacetate and double bonds of the monoester intermediate. The modified flame retardant interacts with magnesium hydroxide, a stable hollow carbon net is formed in the flame retardant process, and the hollow carbon net has a multi-layer adsorption and filtration effect on smoke particles, so that the release of smoke is reduced, and the smoke density is greatly reduced.

The invention discloses an electrolyte additive, an electrolyte, a battery and a power utilization device, the electrolyte additive comprises a compound shown in the formula 1 and a protective agent, the protective agent # imgabs0 comprises a chain compound with the unsaturation degree larger than or equal to 3, the protective agent can be subjected to addition reaction with a sulfonate group-containing free radical formed after the ring-opening reaction of the compound as shown in the formula 1. Therefore, when the electrolyte additive is added into the lithium ion battery, the high-temperature cycle performance and the high-temperature storage performance of the battery can be improved.

The invention discloses an amino-bridged triaryloxy rare earth metal complex and a preparation method and application thereof, the amino-bridged triaryloxy rare earth metal complex is prepared by reaction of a tricyclopentadienyl rare earth compound and amino-bridged triphenol, and the preparation method is simple to operate, convenient to separate and purify, low in raw material cost and mild in reaction condition. The amino-bridged triaryloxy rare earth metal complex provided by the invention can be used for catalytic oxidation of chalcone compounds and cycloaddition reaction of carbon dioxide, the reaction conditions are relatively mild, the universality of reaction substrates is wide, the reaction time is short, the yield of target products is high, and the reaction operation process is simple.

The invention discloses a 2-amino-3-(4-imidazolyl) propionic acid dithioformate chelating agent as well as a preparation method and application of the 2-amino-3-(4-imidazolyl) propionic acid dithioformate chelating agent. The preparation method comprises the following steps: reacting 2-amino-3-(4-imidazolyl) propionic acid with alkali to break inner salt bonds in molecules, and removing H < + > from amino under the action of strong alkali to realize negative ammonia ionization; and then carrying out nucleophilic addition reaction on the 2-amino-3-(4-imidazolyl) propionate dithioformate and carbon disulfide in the presence of strong base to generate the 2-amino-3-(4-imidazolyl) propionate dithioformate chelating agent. The chelating agent disclosed by the invention has two coordination groups, namely-CSS-and-COO-, forms a specific space structure and chelating group distribution, and overcomes the defects that a common aminodithioformate chelating agent is insufficient in heavy metal ion chelating and binding capability, poor in treatment effect and the like due to single chelating group and poor molecular structure. The method is simple in process, mild in reaction condition, simple and convenient to operate and control, free of three wastes and easy to realize industrial production.

The invention discloses a preparation method of silane or siloxane containing adamantyl. According to the invention, adamantane carboxylic acid is taken as a starting raw material, an adamantane compound containing double bonds at the tail end is obtained through an esterification reaction, and then the adamantane compound and hydrogen-containing silane or hydrogen-containing siloxane are subjected to a hydrosilylation reaction to prepare adamantyl-containing silane or siloxane. The method is mild in reaction condition, simple, convenient and easy to operate, capable of achieving preparation of adamantyl silane or siloxane of various structures, wide in application range and capable of providing diversified choices for development of novel adamantyl modified organic silicon materials.

The invention belongs to the technical field of biological materials, and discloses anti-microbial adhesion silicone rubber as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing bornyl acrylate and an amino siloxane coupling agent, and carrying out Michael addition reaction to obtain a borneol-based siloxane monomer; the preparation method comprises the following steps: mixing a borneol-based siloxane monomer and hydroxyl-terminated polydimethylsiloxane, then adding a tin-based catalyst, pouring into a mold, and curing at room temperature to obtain the anti-microbial adhesion silicone rubber. The silicone rubber prepared by the invention has a relatively strong anti-adhesion effect on bacteria and fungi, can effectively prevent microbial adhesion, also has good mechanical properties and biocompatibility, and can be used as a silicone rubber product in the fields of medical treatment, food, adhesives, daily necessities and the like. The preparation method of the silicone rubber is simple, raw materials are easy to obtain, and the silicone rubber is suitable for large-scale production.