67 results about "Coupling reagent" patented technology

This invention discloses a potassium nepheline precursor and its dispersion, a potassium nepheline catalyst, its preparation method, and its applications. The potassium nepheline precursor of this invention has an amino-containing silane coupling agent grafted onto its surface. The potassium nepheline precursor dispersion of this invention comprises a potassium nepheline precursor and a dispersion medium, wherein the average diameter of the potassium nepheline precursor in the dispersion is 5–20 nm. The potassium nepheline catalyst prepared using the potassium nepheline precursor dispersion of this invention exhibits high activity and good stability when used in transesterification reactions to produce biodiesel.

This invention discloses a transparent silica aerogel, an aerogel film, its preparation method, and its applications. The transparent silica aerogel comprises the following components: silica aerogel powder, an alcohol-based organosilicon-modified nanoresin sol, and a silane coupling agent; the silane coupling agent is selected from (3-aminopropyl)triethoxysilane, or a combination of (3-aminopropyl)triethoxysilane and long-chain alkylsilane coupling agents; the silica aerogel powder has a particle size of 5.8-6.2 nm. This invention achieves a breakthrough in the comprehensive performance of transparent silica aerogel, including high transparency, strong adhesion, and tunable hydrophobicity, by compounding silica aerogel powder, alcohol-based organosilicon-modified nanoresin sol, and a specific silane coupling agent.

This application relates to the field of polymer materials technology, providing a PET elastomer, composite material, dynamic covalent network polymer, and its preparation method and application. The elastomer is prepared by in-situ self-assembly of crown ether-primary amide dual-functionalized PET through melt blending. Its molecular network integrates a quasi-rotaxane supramolecular crosslinking network. This structure is formed by the host-guest interaction between the crown ether and the primary amide, and can act as a sliding crosslinking point to dissipate energy through the sliding of cyclic components. This application employs a two-step end-capping-in-situ self-assembly process to overcome the technical obstacles of low PET chain-end activity and poor compatibility between polyrotaxane and PET, achieving molecular-level dispersion of quasi-rotaxane in the PET matrix. This fully utilizes the molecular pulley effect to achieve breakthrough toughening of the elastomer. Simultaneously, it combines rigid nanofillers modified with aminosilane coupling agents to form a soft-hard synergistic network, enabling the PET composite material to maintain high toughness while simultaneously improving strength, modulus, and thermal properties.

The application discloses a kind of fast green and good versatility polyphenol coating modification method, product and application thereof.Hydrophobic material is washed with ethanol multiple times to be pre-wetted;Pre-wetted hydrophobic material is immersed in polyphenol-containing substance, silane coupling agent with amino group and deionized water to be super-hydrophilic modified;Modified film is taken out and washed with deionized water completely.The prepared polyphenol coating modified super-hydrophilic film has layered nanosphere structure, and can be applied to purification of oily wastewater.The method is carried out in pure water system, does not contain any toxic additives and oxidant, and only needs 40 minutes to realize super-hydrophilic modification of various polymer hydrophobic films, greatly improves modification efficiency.Modified PP film prepared by the method has super-high pure water flux and higher oil-in-water emulsion separation efficiency, and has excellent mechanical stability, acid and alkali resistance and long-term stability in air.The method has the advantages of green environmental protection, good versatility, high modification efficiency and the like.

The application relates to the field of sewage treatment, and discloses a sulfur autotrophic denitrification biofilter composite filler and a preparation method thereof. The method comprises the following steps: carrying out a silane hydrolysis reaction on a silane coupling agent containing a mercaptan group to prepare a hydrolysis solution, and then adding hydroxylated polystyrene microspheres into the hydrolysis solution to carry out a grafting reaction and prepare the sulfur autotrophic denitrification biofilter composite filler. The method grafts mercaptan groups to the surface of the polystyrene microspheres by using the silane coupling agent containing the mercaptan group. The mercaptan groups can specifically combine with sulfur transport proteins on the cell membrane of sulfur autotrophic denitrification microorganisms, so that the sulfur autotrophic denitrification microorganisms can selectively colonize on the surface of the polystyrene microspheres, competition between other microorganisms and the sulfur autotrophic microorganisms can be avoided, the colonization stability of the sulfur autotrophic microorganisms is improved, and the biofilm formation efficiency is improved.

The present application relates to the technical field of surface modification materials, and particularly relates to a perfluoroalkyl silane coupling agent for material surface modification and a preparation method thereof. The coupling agent comprises synergistically modified perfluoroalkyl triethoxysilane, an organic small-molecule functional regulator, an acid catalyst, a surfactant, a stabilizer, ethanol and deionized water. The synergistically modified perfluoroalkyl triethoxysilane is prepared by synergistic modification of perfluoroalkyl triethoxysilane, monohydroxyl column [5] arene, octakis(glycidyl ether propyl) silsesquioxane, N-(2-aminoethyl)-3-aminopropyl trimethoxysilane and 2,6-pyridine dimethyl formaldehyde through host-guest inclusion, epoxy-amine ring-opening reaction and Schiff base condensation reaction, and the organic small-molecule functional regulator is 9,10-dihydroxyanthracene. The preparation method is simple and suitable for surface modification of various substrates such as glass, metal, ceramic and polymer materials.

This invention relates to a method for the liquid-phase adsorption separation and purification of 2,3-dichloronitrobenzene and 3,4-dichloronitrobenzene, belonging to the field of chemical separation. This method for the simultaneous separation and purification of 2,3-dichloronitrobenzene and 3,4-dichloronitrobenzene involves preparing small spherical molecular sieve adsorbents from USY molecular sieves, silicon coupling agent-modified illite, and biomass polysaccharides, which are then loaded into a countercurrent simulated moving bed for separation and purification. This method can simultaneously obtain 2,3-dichloronitrobenzene and 3,4-dichloronitrobenzene with a purity ≥99%. The separation and purification method adopted in this invention is not only energy-efficient and highly effective, but also enables continuous production of two high-purity dichloronitrobenzenes, possessing significant industrial application value.

a kind of sp 2 C covalent organic framework functionalized silicon-based chromatographic stationary phases, their preparation methods, and applications. Preparation steps: (1) Preparation of SiO2-NH2: Aminated activated spherical silica particles are prepared using an amino-containing silane coupling agent; (2) SiO2@sp 2 C-COF preparation: Using TMT and TFPT as raw materials, sp was obtained through a Schiff base-mediated aldehyde-alcohol condensation reaction initiated by a self-assembled monolayer auxiliary surface. 2 A C covalent organic framework is loaded onto the surface of a silica matrix via C=N bonds. 2 C-COF possesses an in-plane π-conjugated, highly ordered, and robust framework structure. Its unique hydrophilic covalent triazine groups and hydrophobic benzene rings can provide various interactions such as hydrophobicity, π-π stacking, hydrogen bonding, and hydrophilicity. This enables the stationary relative shape-restricted and geometric isomers to exhibit special selectivity and separation capabilities, overcoming the instability of common imine-bonded COFs in liquid chromatography (HPLC) and the limited selectivity of relatively shape-restricted and geometric isomers stationed in traditional bonded silica gel.

The application discloses a modified silane coupling agent and a preparation method thereof, an anti-yellowing dealcoholized sealant and application thereof, and a preparation method of the anti-yellowing dealcoholized sealant. The preparation method of the anti-yellowing dealcoholized sealant comprises the following steps: A100, carrying out dehydration homogenization treatment on alpha, omega-dihydroxypolydimethylsiloxane, dimethyl silicone oil and a filler under a vacuum condition to obtain a first base material; A200, blending and treating a part of a crosslinking agent and the first base material under the vacuum condition to obtain a second base material; A300, providing a modified silane coupling agent, blending and treating another part of the crosslinking agent, the modified silane coupling agent and a catalyst under the vacuum condition to obtain the anti-yellowing dealcoholized sealant. The modified silane coupling agent is prepared by blending a silazane compound with a trimethylsilyl group and a silane compound with a primary amino group and a hydrolysable silicon functional group, which is favorable for reducing the amino oxidation activity and thus improving the ultraviolet resistance, thermal oxygen aging capacity and storage stability of the anti-yellowing dealcoholized sealant.

This invention discloses a catalyst for the synthesis of indoxacarb intermediates and its preparation method, belonging to the field of precious metal catalyst preparation technology. The preparation method includes the following steps: S1, adding a surfactant and 1-2 mol / L hydrochloric acid to an aqueous ethanol solution to obtain solution A; adding an aminosilane coupling agent and tetraethyl orthosilicate to the aqueous ethanol solution for hydrolysis to obtain solution B; mixing solutions A and B, then adding an ethanol solution of modified phenolic resin, reacting, washing, and freeze-drying to obtain a solid; S2, subjecting the solid obtained in S1 to low-temperature thermosetting, followed by calcination under an inert atmosphere to obtain a support; S3, mixing the support with a palladium chloride solution, shaking at room temperature, drying, and reducing under hydrogen to obtain the catalyst. This invention, through a three-step synergistic process, ultimately enables the catalyst to exhibit high activity and high selectivity in the synthesis of indoxacarb intermediates.

This invention relates to the technical field of PET masterbatch, and particularly to a high-concentration carbon black PET masterbatch and its preparation method. A high-concentration carbon black PET masterbatch comprises the following components by weight: 45-55 parts high-pigment carbon black; 40-50 parts PET carrier resin; 1.5-5.0 parts composite dispersant; 0.3-0.5 parts composite antioxidant; 0.3 parts composite interfacial coupling agent; and 0.5-0.8 parts lubricant. The composite dispersant includes an amino-terminated PET oligomer with a number-average molecular weight of 1000-2000 and an amino value of 20-30 mgKOH / g. This application utilizes the amino-terminated PET oligomer to interact with the active functional groups on the carbon black surface, achieving surface grafting modification of carbon black particles. This forms a molecular chain layer on the carbon black surface with a structure consistent with the matrix resin, fundamentally reducing the interfacial tension between carbon black and the PET matrix, improving the interfacial bonding state between the two phases, and allowing each component to synergistically match the processing and performance requirements of the high-concentration carbon black filling system.

This invention relates to a sialylated glycoprotein detection reagent, its preparation method, and its application, belonging to the field of biodetection technology. The detection reagent uses purified water as a solvent and comprises the following components: surface-modified titanium dioxide nanomaterials, metal ions, a pH adjuster, and a solvent. The surface-modified titanium dioxide nanomaterials are obtained by dispersing titanium dioxide nanoparticles in an organic solvent and reacting them with a silane coupling agent. The pH value of the sialylated glycoprotein detection reagent is ≥ 8.0. The reagent of this invention utilizes the high affinity of modified titanium dioxide nanomaterials for sialic acid to specifically aggregate sialylated glycoproteins in blood into particles, facilitating observation. This reagent exhibits good stability, high sensitivity, and strong specificity, making it suitable for rapid tumor screening of blood smear samples.

This invention relates to a three-emission ratio fluorescence nanosensor for detecting tetracycline and its preparation method. The sensor uses a carbon dot-gold cluster nanocomposite material as the fluorescence signal. The synthesis steps and detection process of the carbon dot-gold cluster nanocomposite material in this invention are simple, convenient, and rapid, exhibiting rich fluorescence color changes. It does not require the assistance of complexes or coupling reagents. By constructing a three-emission ratio fluorescence sensor, the goal of highly sensitive and selective detection of tetracycline can be achieved.

A xanthene derivative of formula I or of formula II, which may be useful as a chromophore, as a free-radical generator, or as an adhesion promoter and / or coupling agent. A mixture including the xanthene derivative of formula I or of formula II. A process for preparing the xanthene derivative process involving reacting a compound of formula (III) with a compound of formula (IVa) or (IVb), in the presence of a Lewis acid. A process for preparing the mixture including the xanthene derivative of formula I or of formula II.

This invention provides a modified crosslinking agent and a fast-curing, heat-resistant, alcohol-free silicone sealant, along with its preparation method. The invention uses a triaminobenzene-containing compound substrate and isocyanate-based trimethoxysilane as raw materials to synthesize a modified alkoxy crosslinking agent containing three urea groups. This crosslinking agent is then combined with α,ω-dihydroxypolydimethylsiloxane, inorganic fillers, a crosslinking agent, a catalyst, and a coupling agent in an alcohol-based system to prepare an alcohol-free silicone sealant. Compared to existing systems, the silicone sealant prepared using this invention exhibits improved curing depth and heat resistance while maintaining good mechanical properties, with a partial increase in mechanical strength. This addresses, to some extent, the increasing demands for heat resistance and curing speed in industrial and construction sectors for silicone sealants, expanding the application scenarios of alcohol-free silicone sealants and significantly improving their application performance and service life in high-temperature environments.

This invention discloses a durable superhydrophobic PFA coating, its preparation method, and its application. Belonging to the field of coating processing and functional material surface modification technology, it grafts γ-aminopropyl groups onto the surface of nanoparticles using a silane coupling agent KH550. These γ-aminopropyl groups are transformed into positively charged ammonium ions in an acidic environment. The repulsion between these ions with the same charge inhibits the aggregation of homogeneous particles, thus fundamentally solving the problem of easy detachment of nanoparticles within the coating. Furthermore, by grafting perfluorinated long chains onto the nanoparticle surface using fluorosilanes, surface energy is reduced, improving the hydrophobicity of the particles. Simultaneously, the similarity and similarity solubility between the long fluorocarbon chains and the PFA coating eliminate interfacial cracks, making it difficult for nanoparticles to peel off when the surface is subjected to friction. The coating prepared by this invention can provide excellent droplet bounce enhancement and droplet adhesion inhibition properties, and is expected to be applied in the field of low-temperature anti-icing.

This invention belongs to the field of inorganic nanoparticle technology, and discloses a silicon-phosphorus-containing inorganic nanoparticle, its preparation method, and its application. The silicon-phosphorus-containing inorganic nanoparticle is prepared from inorganic nanoparticles, a phosphorus-containing compound, and a silane coupling agent. The inorganic nanoparticles are selected from at least one of nano-ZrO2, nano-CaCO3, nano-SiO2, and nano-TiO2. The phosphorus-containing compound is selected from at least one of dimethyl phosphite, diethyl phosphite, and diphenyl phosphite. The silane coupling agent is selected from γ-glycidoxypropyltrimethoxysilane and / or γ-glycidoxypropyltriethoxysilane. The silicon-phosphorus-containing inorganic nanoparticles of this invention, due to surface modification, have significant steric hindrance, are not prone to aggregation, and can be well dispersed in a matrix. The inorganic nanoparticles contain silicon and phosphorus, and have a certain flame-retardant effect.

This invention provides a hydrophobic sustained-release sodium silicate microcapsule and its preparation method, belonging to the field of microcapsules. The invention provides a core-shell structure for the hydrophobic sustained-release sodium silicate microcapsule, with the core being sodium silicate modified with a coupling agent and the shell being polystyrene. This invention achieves double hydrophobic protection by modifying sodium silicate with a coupling agent and using polystyrene for coating, completely altering the hydrophilic surface of sodium silicate. This effectively blocks the contact between water molecules and sodium silicate, significantly reducing the solubility of sodium silicate in water. At room temperature, the solubility of sodium silicate in water decreases from approximately 40 g / 100 g to 2.2 g / 100 g after 24 hours. This invention also modifies sodium silicate with a coupling agent using silicic acid, greatly improving the interfacial bonding between the highly polar sodium silicate and polystyrene, solving the key problem of poor bonding between the two, resulting in a more uniform, dense, and complete polystyrene coating, avoiding coating layer defects.

The application discloses a high-efficiency wastewater mercury removal agent and a preparation method thereof, belongs to the field of wastewater mercury removal, and comprises 20-50 parts of inorganic particles, wherein the inorganic particles are at least one of bentonite, zeolite or molecular sieve, the surface of the inorganic particles is chemically modified by using 1-5 parts of a silane coupling agent, and then the surface is adsorbed by 1-10 parts of an organic thioamide reagent; the bentonite is calcium-based bentonite or sodium-based bentonite with a blue absorption capacity of 40-50 g / 100 g and an expansion ratio of 20-40, the zeolite is clinoptilolite or mordenite, and the molecular sieve is 3A or 4A molecular sieve; the silane coupling agent is at least one of gamma-aminopropyl triethoxysilane, gamma-glycidyl ether oxygen propyl trimethoxysilane, methacryloyl trimethoxysilane, 2-(3,4-epoxy cyclohexyl) ethyl trimethoxysilane and 3-mercapto propyl trimethoxysilane; and the organic thioamide reagent is one or both of thiosemicarbazide and dithizone.

The application relates to an antibacterial and antifouling reverse osmosis membrane and a preparation method thereof, and comprises the following steps: (1) uniformly dissolving a multiacyl chloride group organic compound in an organic solvent, then adding cyclodextrin, and carrying out ultrasonic treatment to obtain a cyclodextrin-organic acyl chloride inclusion compound solution; dispersing antibacterial nanoparticles in water, then adding an amino silane coupling agent, and stirring and dispersing to obtain a functionalized antibacterial nanoparticle suspension with amino groups on the surface; (2) uniformly coating the cyclodextrin-organic acyl chloride inclusion compound solution to one surface of a prefabricated reverse osmosis membrane, removing the excess solution on the surface after standing, and then coating the functionalized antibacterial nanoparticle suspension with amino groups on the surface on the surface with the cyclodextrin-organic acyl chloride inclusion compound, removing the excess solution on the surface after standing, and carrying out thermal drying to obtain the antibacterial and antifouling reverse osmosis membrane. The reverse osmosis membrane has excellent stability, small membrane sheet water flux attenuation, obviously improved antifouling capacity, and excellent antibacterial capacity.

The present application relates to the technical field of condom lubricant, in particular to a water-based lubricant and its application on polyurethane condoms, which comprises the following raw materials: deionized water, glycerol, hydroxymethyl cellulose, polyquaternium-51, disodium ethylenediaminetetraacetate, phenoxyethanol and other additives.In the present application, the carbomer in the other additives is activated by 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride and N-hydroxysuccinimide, and then reacts with the amine group of 3-aminopropyltrimethoxysilane to realize the grafting of silane coupling agent to the carbomer chain, and then copolymerizes with N-vinylpyrrolidone under the action of azobisdimethylaminoformamidine hydrochloride, introducing polyvinylpyrrolidone segments, effectively improving the hydrophilicity and hydration capacity of the material, making the lubricating layer strongly adhere to the substrate and not easy to be erased, thereby improving the lubricating performance of the water-based lubricant.

This invention discloses a core-shell based solvent-free nanofluid, its preparation, and its application in capturing greenhouse gases. The nanofluid is formed by dispersing inorganic nanoparticles in a co-flowing phase of a bifunctional coupling agent and a polymer. The inorganic nanoparticles are core-shell SiO2@LDH composite particles, consisting of LDH nanosheets loaded on the surface of SiO2 nanoparticles. The LDH is a layered double hydroxide. One end of the bifunctional coupling agent is hydrolyzed to form silanol groups, which undergo a condensation reaction with the hydroxyl groups on the surface of the LDH nanosheets to form stable chemical bonds. The other end of the coupling agent has an epoxy group that undergoes a ring-opening reaction with the amino groups in the polymer, achieving covalent grafting. This invention solves the problems of poor stability, easy aggregation, and unclear functional regulation and CO2 capture mechanisms in existing technologies. The resulting nanofluid exhibits high dispersion stability and excellent flowability, achieving the goal of efficient CO2 capture.

The present application belongs to the technical field of color paste dispersant, and particularly relates to a dispersant for water-based nano color paste and a preparation method thereof. In the present application, inorganic two-dimensional nanosheets are used as rigid carriers, amino groups are introduced through amino-containing silane coupling agents, a step-by-step grafting strategy is adopted, carboxyl groups in the anchoring group are activated by EDC / NHS first, and then react with the amino-functionalized nanosheets to form amide bonds, and then hydrophilic solvent chains terminated by carboxyl groups are grafted to obtain a bifunctional grafting dispersant; wherein the two-dimensional nanosheets are montmorillonite or graphene oxide, the anchoring group is a carboxylic acid compound containing an aromatic ring, and strong adsorption is achieved on the surface of the pigment through π-π stacking; the solvent chains extend into the aqueous phase to provide steric hindrance; the rigid nanosheet skeleton prevents the collapse of the solvent chains; the dispersant prepared by the method has high dispersing performance in the water-based nano color paste, can realize nano-level dispersion of pigment particles, and has excellent storage stability.

The present invention relates to the technical field of polypeptide drug preparation methods. Provided is a solid-phase preparation method for high-yield and high-purity tirzepatide. An amino resin is used as a starting resin; amino acids and small-fragment peptides are sequentially coupled according to the amino acid sequence of tirzepatide using a solid-phase synthesis method to synthesize a tirzepatide resin; and the tirzepatide resin is cleaved and purified to obtain a pure tirzepatide product. The small-fragment peptides include a 1-4 tetrapeptide fragment Boc-Tyr(tBu)-Aib-Glu(OtBu)-Gly-OH, a 5-6 dipeptide fragment Fmoc-Thr(tBu)-Phe-OH, a 7-8 dipeptide fragment Fmoc-Thr(tBu)-Ser(tBu)-OH, a 10-11 dipeptide fragment Fmoc-Tyr(tBu)-Ser(tBu)-OH, a 12-13 dipeptide fragment Fmoc-Ile-Aib-OH, a 17-18 dipeptide fragment Fmoc-Ile-Ala-OH, a 20-side-chain peptide Fmoc-Lys(AEEA-AEEA-γ-Glu(α-OtBu)-Eicosanedioic acid(mon-tBu))-OH, a 28-30 tripeptide fragment Fmoc-Ala-Gly-Gly-OH, a 32-34 tripeptide fragment Fmoc-Ser(tBu)-Ser(tBu)-Gly-OH, and a 36-38 tripeptide fragment Fmoc-Pro-Pro-Pro-OH. A coupling agent for coupling the amino acid and the small-fragment peptide is selected from Oxyma and DIC, TPTU and TMP, or COMU and DIEA.

The application relates to a preparation method of an amino silane polymer, comprising the following steps: S1, selecting gamma-glycidoxypropyltrimethoxysilane, ethylenediamine and epoxypropoxytriethoxysilane and deionized water as raw materials, wherein the molar ratio of silane monomer A, amine compound B and coupling agent C is 1:0.9:0.3; the application realizes ordered introduction of amino groups on a silicon-oxygen skeleton by accurately controlling the molar ratio of the silane monomer, the amine compound and the coupling agent, forms a highly controllable molecular structure, enables the polymer to form a three-dimensional crosslinked network in a polycondensation process, the structure not only improves the molecular chain stability and thermal stability of the polymer, but also can significantly enhance the adhesion and peeling resistance when applied to metal, concrete and glass surface coating, and ensures the integrity and weather resistance of the coating during long-term use.

The application discloses a palygorskite organic modified polyferric flocculant, a preparation method and application thereof, and the preparation method of the flocculant comprises the following steps: activating palygorskite with hydrochloric acid, modifying the palygorskite with a silane coupling agent, copolymerizing the modified palygorskite with ferric chloride and sodium hydroxide alkalization, and obtaining the palygorskite organic modified polyferric flocculant through standing, curing and calcining of the product. The flocculant has the advantages of low cost, simple synthesis method, mild reaction condition, good treatment effect, effective reduction of the dosing amount, improved water treatment capacity, excellent removal rates of COD and heavy metal antimony of printing and dyeing wastewater. After the printing and dyeing wastewater is treated by the flocculant, the optimal removal rate of COD reaches 73.2%, and the total antimony removal rate reaches 98.53%.

The application relates to the technical field of wastewater treatment, in particular to a metal-modified ion exchange membrane and a preparation method and application thereof. The metal-modified ion exchange membrane comprises the following steps: taking an anion exchange membrane as a base film, modifying the surface of the base film after impurity removal through pretreatment by using an amino silane coupling agent to obtain an amino silane coupling agent modified base film, and co-loading Zr 4+ , Al 3+ , Nd 3+ on the amine group active sites of the amino silane coupling agent modified base film through coordination bonds, and then forming a ZrO(OH)2, AlO(OH), Nd(OH)3 composite adsorption layer on the surface of the base film through hydroxylation to obtain the metal-modified ion exchange membrane. The ion exchange membrane is modified through the steps of "pretreatment-coupling agent modification-multimetal co-loading-hydroxylation", the bridging effect of the coupling agent is used to strengthen the binding stability of the metal components and the film base material, the multimetal synergistic effect is used to endow the film with efficient and stable fluorine adsorption performance, and the synergistic defluorination of electromigration and chemical adsorption is realized.