55 results about "Mercapto Compounds" patented technology

The application provides a preparation method of ergothioneine and application of a mercapto compound in the method. The method comprises the following steps: in the presence of a catalyst system, a sulfur oxide is reacted to generate ergothioneine. The catalyst system comprises a first catalyst and a second catalyst. The first catalyst is ergothioneine synthase, and the second catalyst is one or more of a mercapto-containing amino acid and a mercapto-containing polypeptide. The preparation method of ergothioneine provided by the application does not need to use a large amount of a chemical mercaptan reagent with a foul smell, has the advantages of high efficiency, green environmental protection, and friendly production scene, and is beneficial to industrial production of ergothioneine.

The invention discloses a method for low-alkalinity flotation of lead-zinc (silver-containing) polymetallic ore based on a heterocyclic sulfydryl coordination polymer, which comprises the following steps of: adjusting the pH value of ore pulp to 7.5 + / -0.3, and sequentially carrying out roughing, scavenging and concentration by adopting a composite collecting agent according to a gradient flotation procedure; wherein the mass concentration of the ore pulp is 20-40%; the adding amount of the composite collecting agent is 150-300g / t of ore pulp; the composite collecting agent is composed of a modified heterocyclic sulfhydryl compound, C12-C18 alkylamine polyoxyethylene ether and a star-shaped branched nonionic surfactant according to the mass ratio of 1: (1-3): (0.5-2). According to the method, the complex silver polymetallic ore is subjected to efficient flotation under the low-alkalinity condition by applying the composite collecting agent based on the heterocyclic sulfydryl coordination polymer. Through deep exploration and optimization of a flotation reagent system, process parameters and a microcosmic action mechanism, the recovery rate of metal such as silver, copper and lead is remarkably increased, and the ore dressing cost is greatly reduced.

The invention discloses a surfactant with a branched structure as well as a preparation method and application of the surfactant. The preparation method comprises the following steps: carrying out Michael addition reaction on an amphiphilic branched polymer and polyfluorinated organic amine in an organic solvent in the presence of a catalyst to obtain the surfactant with the branched structure, the amphiphilic branched polymer has a hydrophilic chain segment and a hydrophobic chain segment, and the tail end of a branched molecular chain has double bonds. The amphiphilic branched polymer is obtained by copolymerization of polyethylene glycol di (methyl) acrylate and polypropylene glycol di (methyl) acrylate through active free radicals, or is prepared by Michael addition polymerization of a di (methyl) acrylate compound and a dimercapto compound or a diamine compound in an organic solvent in the presence of a catalyst. The surfactant can quickly reduce the surface tension and prolong the retention time of pesticide liquid, and is green, environment-friendly and degradable.

An alkoxysilyl-containing polyurethane polymer composition is prepared using a urethane-forming organometallic catalyst which is then stabilized to moisture exposure by the addition of a mercapto-containing compound. The stabilized moisture-curable alkoxsilyl-containing polyurethane polymer composition is activated to moisture curing by the addition of a hydrolysis and condensation catalysts. The stabilized moisture-curable alkoxsilyl-containing polyurethane polymer composition is useful as a component in the preparation of coatings, adhesives, sealants, consumer goods and industrial goods.

The invention discloses a tellurium-based nano material capable of efficiently inducing copper death as well as a preparation method and application of the tellurium-based nano material. The preparation method comprises the following steps: by taking water as a medium, mixing soluble copper salt and a sulfydryl-containing compound, and stirring to react, so as to obtain a Cu-S2 solution; dropwise adding the Cu-S2 solution into the TeO2 nano-carrier solution, and carrying out stirring reaction; and after the reaction is finished, carrying out solid-liquid separation, taking the solid, and resuspending with methanol to obtain the TeO2 coated Cu-S2 nano material. The preparation method is simple and rapid, large-scale production can be achieved, and the obtained TeO2 coated Cu-S2 nano material can efficiently induce cancer cells to generate copper death, is effective to various cancer cells and has potential clinical transformation application prospects.

The application discloses a kind of based on fluorine-free organic small molecule ultra-thin super-hydrophobic coating and preparation method thereof, specific steps are as follows: 20 portions-40 portions of amine compound, 20 portions-40 portions of epoxy compound and 20 portions-40 portions of solvent are mixed, and mixed solution is obtained.After substrate is soaked in mixed solution 1h-24h, pretreated substrate is obtained.1 portion-30 portions of olefin compound, 1 portion-25 portions of polydimethylsiloxane, 1 portion-25 portions of initiator, 1 portion-40 portions of mercapto compound, 1 portion-40 portions of solvent are mixed, and mixed coating is obtained.Mixed coating is evenly covered on the surface of pretreated substrate, and after standing 1h-7h, it is dried, and ultra-thin super-hydrophobic coating is obtained.The ultra-hydrophobic coating prepared by the method has excellent stability, durability, self-cleaning property and oil-water separation performance, and can be widely used for separating immiscible oil-water mixture.

The application provides a preparation method of super-hydrophobic cotton cloth with self-cleaning and oil-water separation functions, and belongs to the technical field of functional materials. The preparation method is characterized by the following steps: modifying a commercial cotton cloth by using a silane surfactant to modify a mercapto group, in-situ grafting polybutadiene on the modified cotton cloth by using a photosensitizer in a n-hexane solution, and grafting hydrophobic particles to the cotton cloth by using a bis-mercapto compound. The super-hydrophobic cotton cloth prepared by the application has good super-hydrophobic performance and oil-water separation selectivity, and has a super-high continuous adsorption efficiency of oil in an oil-water mixture, which can reach 99.9%. The application has a simple process and is suitable for industrial production. The super-hydrophobic cotton cloth prepared by the application has high stability, can be recycled, and can be used for repairing water bodies such as marine oil spills and oil-containing industrial wastewater treatment.

The application discloses a method for preparing a disulfide at low temperature, which comprises the following steps: coupling reaction of m-dihalobenzene and a mercapto compound in the presence of sodium hydride and lithium iodide to prepare the disulfide. At present, the existing methods for synthesizing a disulfide have some problems to a greater or lesser extent. Either noble metal catalysis is needed, the cost is high, and there is a risk of heavy metal residue in the product; or the reaction operation is complex and complicated, and the reaction condition is harsh. The application develops a new method, which can start from cheap and readily available raw materials, use cheap initiators, and simply and effectively synthesize a disulfide under mild reaction conditions, so as to meet the needs of research and development and actual production.

This invention discloses an electro-assisted passivation solution and its preparation and passivation methods. The raw materials of the electro-assisted passivation solution include the following components: 0.1-1 wt.% alkali-soluble mercapto compound, 0.1-1 wt.% amphoteric oxide, 1-5 wt.% inorganic alkali, 0.5-1.5 wt.% nonionic surfactant, and the balance being water. The components do not contain toxic substances. The passivation solution is suitable for electro-assisted passivation processes. The film formation process on copper parts is very fast, and the formed film layer is dense and uniform, resulting in good corrosion resistance, high protection effect, and environmental friendliness for the copper parts.

The application relates to the technical field of compound synthesis, and discloses an aromatic dipeptide functionalized mercapto compound, 3,5-di(triphenylmethylthio)benzoic acid is obtained by adding 3,5-di(methylmercapto)benzoic acid and pyridine into a solution of chloromethyl triphenylphosphonium, purifying after sufficient reaction; then the 3,5-di(triphenylmethylthio)benzoic acid is mixed with N-hydroxysuccinimide and dissolved in an organic solvent, EDC.HCl is added, purifying after sufficient reaction; then 2,5-dioxopyrrolidin-1-yl 3,5-bis(triphenylmethylthiomethyl)benzoate is obtained; then phenylalanine-tryptophan and triethylamine are added, purifying after sufficient reaction; then (3,5-bis(triphenylmethylthiomethyl)benzoyl)tryptophylphenylalanine is obtained; then trifluoroacetic acid and triethylsilane are added, purifying after sufficient reaction; and finally the aromatic dipeptide functionalized mercapto compound is obtained. The aromatic dipeptide functionalized mercapto compound can quickly and effectively identify sodium and potassium ions, and has relatively low detection limit and relatively loose detection condition.

The invention relates to the technical field of papermaking, in particular to a preparation method of ultrathin high-strength paper-based adhesive tape base paper. The preparation method comprises the following steps: mixing softwood pulp and hardwood pulp, forming base paper by adopting a double-net dehydration process, and forming a covalent cross-linked network in a paper sheet by adopting a cellulose reactive coupling agent with an o-benzoquinone structure and a multi-sulfydryl compound based on a sulfydryl-benzoquinone click chemistry and interface supramolecular assembly multi-bonding enhancement system; meanwhile, a dual intelligent enhancement system based on a biomacromolecule self-assembly body and a dynamic metal coordination network is established, and dynamic reversible crosslinking is constructed through a polyelectrolyte compound and a Fe < 3 + >-tannic acid coordination network; a multifunctional surface treatment technology combining a zwitterionic polymer brush and bionic in-situ mineralization is developed, a sulphobetaine methacrylate polymer brush grows through a surface-initiated atom transfer radical polymerization method, amorphous silicon dioxide is induced to be mineralized, and the adhesive tape body paper prepared through the method is high in strength.

The application provides a photosensitive resin composition, a resist ink, a resist laminated body and application thereof. The photosensitive resin composition comprises, in parts by weight, 50-70 parts of an alkali-soluble resin, 30-50 parts of a photopolymerizable monomer and 0.1-4.0 parts of a photoinitiator; wherein the photopolymerizable monomer comprises an allyl compound and a mercapto compound, and the mass content of the mercapto compound in the photopolymerizable monomer is 7wt%-22wt%. The application introduces the allyl compound and the mercapto compound into the photosensitive resin composition, the alkyl group in the allyl compound can add polymerize with the mercapto group in the mercapto compound, which helps to make the prepared photosensitive resin have relatively uniform crosslinking after exposure, and obtain a photosensitive resin with low polymerization shrinkage stress, which shows good adhesion in the bonding process of a copper substrate.

The invention discloses an application of a phenolic anti-aging agent with thermal oxidation resistance and ozone aging resistance in a diene rubber composite material. The phenolic anti-aging agent is obtained by reacting a natural antioxidant containing a phenolic hydroxyl group and unsaturated double bonds with a sulfhydryl compound. According to the invention, the natural antioxidant is modified by adopting click chemical reaction, and the obtained product has excellent performance in the aspects of thermo-oxidative aging resistance and ozone aging resistance, so that the thermo-oxidative aging process of the rubber composite material can be obviously slowed down, and cracks generated on the surface of the material due to uniform cracking of ozone can be effectively reduced.

The invention discloses an injectable self-healing hydrogel based on thiohemiketal as well as a preparation method and application thereof, and the injectable self-healing hydrogel is prepared according to the following steps: (1) preparation of a water-soluble trifluoroacetophenone monomer: adding 1-(4-(bromomethyl) phenyl)-2, 2, 4-triazole-1-yl)-1, 2, 4-triazole-1-yl)-2, 2, 4-triazole-1-yl)-2, 2, 4- The preparation method comprises the following steps: carrying out quaternization reaction on 2, 2-trifluoroethyl-1-ketone and a quaternization reagent containing double bonds to obtain a water-soluble trifluoroacetophenone monomer; (2) carrying out free radical copolymerization on a water-soluble trifluoroacetophenone monomer and a hydrophilic monomer to obtain a trifluoroacetophenone functionalized linear polymer; and (3) mixing the trifluoroacetophenone functionalized linear polymer with the aqueous solution of the multi-sulfhydryl compound to obtain the injectable self-healing hydrogel based on the thiohemiketal. According to the method, a linear polymer functionalized by trifluoroacetophenone reacts with a multi-sulfhydryl compound to form the thiohemiketal dynamic cross-linked injectable self-healing hydrogel, so that the problems that part of dynamic covalent hydrogel is insufficient in self-healing performance and limited in pH use range are solved.

The embodiment of the invention relates to the field of catalytic synthesis of sulfhydryl compounds, in particular to a method for preparing 3-mercaptopropionic acid by efficiently catalyzing an acrylic acid-hydrogen sulfide addition reaction through organic phosphorus. Uniformly mixing acrylic acid, a polymerization inhibitor and part of a solvent, and transferring the mixture into a constant-pressure titrator; uniformly mixing an organic phosphine catalyst with the residual solvent, and transferring the mixture into a high-pressure kettle; the method comprises the following steps: connecting a constant-pressure titrator with a high-pressure kettle, firstly introducing inert gas to purge a reactor, then sequentially introducing reducing gas and hydrogen sulfide gas, and maintaining the pressure for a certain period of time; starting a constant-pressure titrator and dropwise adding a raw material mixed solution containing acrylic acid at a certain rate; and after the raw material mixed solution is dropwise added, introducing hydrogen sulfide gas again, and carrying out an acrylic acid-hydrogen sulfide addition reaction. The reaction conditions for preparing the 3-mercaptopropionic acid provided by the invention are mild, the generation amount of three wastes is small, the high reaction yield of the 3-mercaptopropionic acid can be realized under the conditions of low reaction temperature and pressure, and the 3-mercaptopropionic acid product with the purity of more than 99.8% can be obtained from the reaction liquid through a vacuum distillation process.

The present application relates to a multifunctional hydrogel for treating traumatic brain injury and a preparation method and application thereof. The preparation method of the hydrogel comprises the following steps: step 1, dissolving a tetracycline drug in a buffer to prepare a tetracycline drug solution; step 2, adding a multi-arm polyethylene glycol with a double bond end group into the solution prepared in step 1 to form a solution containing the multi-arm polyethylene glycol with a double bond end group and the tetracycline drug; step 3, adding a multi-sulfhydryl compound into the solution prepared in step 1 to form a solution containing the multi-sulfhydryl compound and the tetracycline drug; and step 4, mixing the solutions prepared in steps 2 and 3 to prepare the hydrogel. In the acute phase, the active oxygen rapidly increases to make the hydrogel release more drugs to regulate the inflammatory environment and play a neuroprotective role, and in the chronic phase, the hydrogel continuously releases drugs to continuously regulate the anti-inflammatory polarization of microglia cells, enhance neural plasticity and restore nerve function.

The invention discloses a modified vegetable protein adhesive and a preparation method thereof. The adhesive comprises two core types: one core type is prepared from vegetable protein meal, alkali, urea, water and a thiolated PAE resin cross-linking agent; and the other one is prepared from vegetable protein meal, alkali, urea, water and a water-borne epoxy resin cross-linking agent. The sulfhydrylated PAE resin cross-linking agent is prepared by grafting a sulfhydryl-containing compound to a polyamide polyamine main chain, and a compact cross-linked network can be formed through the effects of disulfide bond construction and the like; the water-borne epoxy resin cross-linking agent is prepared from epoxy resin, methacrylic acid, a comonomer and other raw materials through copolymerization and neutralization, and protein hydrophilic groups can be effectively blocked. The adhesive disclosed by the invention is modified by the specific cross-linking agent, so that the bonding strength and the water resistance are remarkably improved, meanwhile, the advantages of environment friendliness and no formaldehyde are kept, and the adhesive can be widely applied to manufacturing of artificial boards such as plywood and shaving boards.

This invention belongs to the field of building materials technology, specifically relating to a high-flexibility emulsion, its preparation method, and its application in flexible ceramics. The high-flexibility emulsion uses methyl methacrylate, isooctyl acrylate, hydroxyethyl acrylate, and modifier A as core monomers; and methyl methacrylate, styrene, hydroxyethyl acrylate, and modifier B as shell monomers, prepared using a monomer pre-emulsification semi-continuous seed emulsion polymerization process. Modifier A is obtained by reacting epoxidized cashew nut shell powder with a mercapto compound; modifier B is obtained by reacting carboxybenzotriazole, epoxy silane, and epoxy acrylate. This invention prepares a core-shell structured high-flexibility emulsion using a monomer pre-emulsification semi-continuous seed emulsion polymerization process. By introducing specific modifiers A and B into the core and shell monomers, the low-temperature flexibility, frost resistance, tensile properties, and weather resistance of flexible ceramics are optimized.

This invention provides a method for detecting dichromate ions based on surface-enhanced Raman spectroscopy, belonging to the field of analytical chemistry. The method includes: mixing the sample to be tested with a solution containing a thiol compound, adjusting to acidic conditions to allow dichromate ions (Cr(VI)) to undergo a redox reaction with the thiol-containing compound; constructing a SERS substrate, i.e., preparing a ZnO / Ag heterostructure substrate; mixing a suspension of the ZnO / Ag heterostructure substrate with the reaction system to obtain a mixed solution, allowing the ZnO / Ag heterostructure substrate to adsorb the thiol-containing compound and enhance the Raman signal; dropping the mixed solution onto the surface of a solid support, acquiring the Raman spectral signal using a Raman spectrometer, and quantifying the Cr(VI) concentration by the change in signal intensity. This invention achieves rapid and highly sensitive detection of Cr(VI), exhibiting strong selectivity and anti-interference capabilities, and is suitable for detection in fields such as environmental monitoring, food safety, and pharmaceutical analysis.

The application discloses a kind of bio-based hyperbranched epoxy resin / Bisphenol A type epoxy resin composite resin containing imide structure.Preparation process: (1) the reaction of hydroxyl amine, aldehyde compound and mercapto carboxylic acid obtains mercapto compound A3) ;(2) N-phenyl maleimide, 2,5-furan dimethylamine and mercaptan are synthesized by thiol-olefin click reaction Diamino compound, again with maleic anhydride and carry out imidization reaction, synthesis bio-based maleimide (B2) ;(3) A3 and B2 are synthesized by click reaction end mercapto hyperbranched polymer, again with alkenyl epoxy compound and generate bio-based hyperbranched epoxy resin by click reaction;(4) Bisphenol A type epoxy resin is blended with it and cured, and bio-based hyperbranched epoxy resin / Bisphenol A type epoxy resin composite resin containing imide structure is obtained.The material prepared in the application is environment-friendly and sustainable production, and can be applied to aerospace, turbine technology and other frontier fields.

The application discloses a heavy metal wastewater treatment agent and a use method thereof, and relates to the technical field of sewage treatment. The heavy metal treatment agent mainly comprises an agent A, an agent B and an agent C, wherein the agent A is a liquid agent and contains the following raw materials in parts by weight: 40-45 parts of a strong oxidant, 2-5 parts of a chelating agent and 2-5 parts of a catalyst; the agent B is a solid agent and is mainly a heavy metal adsorbent; the nano zero-valent iron is modified twice by a mercapto compound and a porphyrin compound, so that the adsorption capacity for heavy metals is increased, the electron transfer efficiency is improved, and the reduction performance of the nano zero-valent iron is enhanced; and the agent C is a liquid agent and mainly contains 1-5% of a flocculant and 0.1-0.2% of a coagulant aid. The heavy metal ion-containing wastewater treatment agent provided by the application has a removal efficiency of more than 95% for heavy metal wastewater with low pH value and complex components, and the effluent is stable and reaches the discharge standard.

The invention discloses a microcapsule type curing agent as well as a preparation method and application thereof, and belongs to the technical field of epoxy resin curing. The microcapsule type curing agent comprises a microcapsule shell and a microcapsule core, the microcapsule core is an imidazole curing agent, and the microcapsule shell is obtained by a thiol-ene click reaction of an allyl compound and a thiol compound. According to the present invention, the sulfydryl-alkene click reaction has characteristics of high selectivity and high efficiency, such that the allyl compound and the sulfydryl compound can rapidly form the cross-linked shell layer during the reaction so as to rapidly coat the imidazole curing agent so as to improve the coating rate; moreover, the allyl compound and the sulfhydryl compound react to form a compact three-dimensional network, so that the strength and compactness of the microcapsule shell are improved, and the dispersion stability of the curing agent in the epoxy resin and the final curing performance are improved.

The invention relates to the technical field of photoelectric devices, in particular to a composition for a photoelectric device, a polymer, ink and the photoelectric device. The composition for the photoelectric device comprises a main body material, a sulfhydryl compound and a P-type dopant, and the main body material comprises one or more of compounds with the structure shown in the formula (I); the sulfhydryl compound comprises one or more of compounds with structures as shown in a formula (II); the P-type dopant comprises one or more of compounds with a structure as shown in a formula (III). The composition for the photoelectric device provided by the invention can be used for preparing a hole functional material, has excellent solvent resistance, and can effectively improve the hole transmission property, thereby being beneficial to improving the efficiency of the photoelectric device.

The invention relates to a mercapto-functional adduct from the reaction of at least one mercaptan M having at least three mercapto groups with at least one isocyanate-group-containing polymer having an average molecular weight Mn of at least 1000 g / mol in a ratio of the number of mercapto groups to the number of isocyanate groups at the start of the reaction of at least 4. The adduct makes it possible to produce epoxy resin adhesives with good workability, rapid curing, good adhesion properties and a surprising combination of high strength and high impact resistance.

The invention relates to the technical field of wastewater treatment, in particular to a modified resin material as well as a preparation method and application thereof. The modified resin material comprises modified porous resin microspheres and hydrophobic coatings coated on the surfaces of the modified porous resin microspheres and in a porous structure; the modified porous resin microsphere comprises a porous resin microsphere matrix, and a sulfydryl compound and a phosphonic acid compound which are grafted on the surface of the porous resin microsphere matrix and in a porous structure. The modified resin material provided by the invention has excellent heavy metal selectivity and suspended matter blockage resistance, has good regeneration performance, and is suitable for advanced treatment of high-salinity wastewater in salt lakes, chemical engineering and the like.

The application provides a method for simultaneously detecting reduced and oxidized biological aminothiol compounds, which comprises the following steps: subjecting a sample to be detected to derivatization of two reagents of a sulfydryl protection reagent and [d0] / [d3]-dimethoxymethyl benzisopyrylium salt in sequence to obtain a derivatized sample, and then performing liquid chromatography-mass spectrometry detection on the derivatized sample to obtain a detection result. The biological aminothiol compounds (BATs) are analyzed by using the method, the sample pretreatment step is simple, the conversion of reduced BATs into oxidized BATs is blocked, and qualitative and quantitative analysis of the reduced BATs and the oxidized BATs can be simultaneously realized.

This invention discloses a gold (I) complex, its preparation method, and its applications. The gold (I) complex is as shown in Formula I: In this invention, Formula I is a strongly sterically hindered nitrogen-heterocyclic carbene (NHC) gold (I) complex. This invention utilizes a steric hindrance control strategy to design a series of stable active gold (I) complexes containing highly sterically hindered NHC ligands. These highly sterically hindered gold complexes can tolerate excessive intracellular thiol compounds and exhibit good stability; they can maintain normal intracellular catalytic activity, possess good probe imaging and prodrug activation properties, demonstrating highly efficient in vitro and in vivo antitumor activity; and they also exhibit good antibacterial activity.

The invention discloses a multi-sulfhydryl compound, a preparation method and application thereof, a quantum dot and a quantum dot light-emitting diode device. The multi-sulfydryl compound comprises a core rigid skeleton, and at least two sulfydryl functional groups are connected to the core rigid skeleton; wherein the core rigid framework is of a cage-shaped saturated carbocyclic structure or heteroaromatic ring, adamantane or benzotriazole; the sulfydryl functional group is connected to a carbon atom of the core rigid framework. According to the multi-sulfydryl compound, a cage-shaped rigid framework (adamantane) or heteroaromatic ring (benzotriazole) serves as a rigid core framework, at least two sulfydryl groups are connected to the rigid core framework, and multi-point strong coordination passivation and space protection are achieved through cooperation of the rigid framework and the multi-sulfydryl groups. On one hand, a rigid framework does not hinder carrier transmission, and on the other hand, surface defects are thoroughly passivated through multi-sulfydryl strong coordination.

The invention discloses fluorine-containing modified epoxy resin which is prepared by the following steps: S1, dissolving a carboxyl-containing sulfhydryl compound in an organic solvent, then adding a fluorine-containing alkyl acrylate compound and a photoinitiator, reacting for 4-6 hours under the irradiation of 365 nm ultraviolet light, and then purifying to obtain a fluorine-containing modifier; s2, mixing the fluorine-containing modifier, epoxy resin, a catalyst and a polymerization inhibitor, then heating to 110-120 DEG C, and reacting for 3-7 hours until the acid value is lower than 15 mg KOH / g, so as to obtain the fluorine-containing modified epoxy resin. Fluorine-containing modified epoxy resin and dynamic imine bonds are synergistically introduced to prepare the coating, a hydrophobic barrier is formed through the surface enrichment effect of fluoroalkyl chains, the barrier capacity of the coating to corrosive media is improved, and the material is endowed with a hot-pressing recovery function by means of the reversible exchange reaction of the imine bonds, so that the coating has a good application prospect. The defects that a traditional epoxy resin coating is unrecyclable and insufficient in corrosion resistance and durability are remarkably overcome, and the problem that microcracks and holes are prone to being generated in the curing process of epoxy resin is solved.