104 results about "(3-Aminopropyl)triethoxysilane" patented technology

The invention provides a magnetic nano-particle immobilized basic protease, the magnetic nano-particle immobilized basic protease is obtained by utilizing a silylating reagent of 3-aminopropyl-triethoxysilane to modify Fe3O4 nano-particles so as to improve water solubility and stability of the Fe3O4 nano-particles, introducing a free amino terminal onto the surface of the Fe3O4 nano-particles, and then using a bifunctional reagent of p-phenylene diisothiocyanate to fix the basic protease into the Fe3O4 nano-particles modified by the silylating reagent, and the magnetic nano-particles with surface functionalization are taken as a vector for immobilizing the basic protease so as to be applied in green transformation of biomass. The preparation method is simple and easy to operate, and a biological catalyst can be rapidly and conveniently recycled through an externally applied magnetic field, thereby being conductive to realization of continuous large-scale production through biological catalytic reaction.

The invention belongs to the technical field of composite materials, and particularly relates to a CDs/SiO2/AuNCs ratiometric fluorescent probe, a preparation method and application. The preparation method comprises the following steps that after citric acid and ethanediamine are subjected to the hybrid reaction and dialysis by adopting deionized water, a carbon quantum dot solution is obtained; an ammonium hydroxide-absolute ethyl alcohol solution and tetraethoxysilane are added for a reaction, and then 3-aminopropyl triethoxysilane is added for a reaction; mixed liquid of 1-(3-dimethylaminopropyl)-3-ethyl carbon diimine hydrochloride, an N-hydroxy succinyl imine solution and an AuNCs solution with stable 11-sulfydryl undecanoic acid which are mixed uniformly is added, and after the reaction, the CDs/SiO2/AuNCs ratiometric fluorescent probe is obtained. The detection limit of the ratiometric fluorescent probe for Cu2+ is as low as 0.013 micromole/litre, the detection limit of the ratiometric fluorescent probe for alkaline phosphatase is as low as 0.05 U/L, and the practical application value is achieved on detection of the Cu2+ and the alkaline phosphatase.

The invention belongs to the field of nano composite materials and discloses a preparation method of antibody-mediated optomagnetic double-mode meso-porous silicon nanoparticles. The preparation method comprises the steps of by taking nano ferroferric oxide as a core, applying silicon dioxide to package, labeling by fluorescein isothiocyanate, carrying out surface modification on 3-aminopropyl triethoxysilane to realize amination; then, grafting lactobionic acid by carboxyl-ammonia crosslinking; and finally, activating carboxyl and prostate stem cell antigen (PSCA) antibody. The preparation method disclosed by the invention is simple, and convenient to operate; the obtained nanoparticles have the advantages of active targeting, good biocompatibility, small toxic and side effect, good monodispersity and stability, stable imagnetic and fluorescence performance and the like.

The present invention belongs to the field of materials science and modern separation and analysis, and relates to a preparation method and an application for a magnetic metal organic framework medium modified by a new nucleic acid aptamer. The method comprises the following steps of: firstly preparing nanoscale amino functional magnetic ferroferric oxide (NH2-Fe3O4); then adopting a hydrothermal synthesis method to obtain the magnetic metal organic framework medium; and finally adopting a coupling agent streptavidin as an intermediate to prepare the magnetic metal organic framework medium modified by an ochratoxin A nucleic acid aptamer (OTA Apt -MMIL-101). With adoption of reaction functionalization of ferroferric oxide and 3-aminopropyl triethoxysilane (APTES), OTA Apt-MMIL-101 is synthesized by the NH2-Fe3O4 and a metal organic framework 101 medium (MIL-101) synthetic agent under a condition of hydrothermal reaction through a chemical bonding method, is washed and is dried in vacuum. The OTA Apt-MMIL-101 disclosed by the present invention has good stability and high selectivity recognition performance, and is applicable to selective enrichment and separation of complex samples such as organisms, environment and food.

The invention discloses a preparation method and catalytic application of a Silicalite-1 single crystal-coated nanopalladium-loaded core-shell catalyst, and belongs to the field of novel catalytic materials. The preparation method comprises the following steps: under the hydroxyl action between 3-aminopropyl triethoxysilane and the surfaces of Silicalite-1 molecular sieve nanocrystals, modifying amino groups onto the surfaces of the molecular sieve nanocrystals; then, through coordination and complexation actions between the Pd<2+> and the amino groups modified on the outer surfaces of the Silicalite-1, uniformly and fixedly loading the Pd<2+> onto the surface of a nanocrystal molecular sieve to form the palladium-loaded nanocrystals Pd/Silicalite-1; finally, adding the Pd/Silicalite-1 nanocrystals into a synthesis solution of Silicalite-1 molecular sieve single crystals, and synthesizing the Pd@Silicalie-1 single crystal-coated core-shell catalyst via induced growth. By the preparation method, preparation is simple and high in efficiency, and the defects that the conventional catalyst is poor in monodispersity, is required to be roasted for multiple times and takes a long time for crystallizing or posttreating a sample are overcome. Compared with the traditional homogeneous catalyst, the core-shell catalyst has the characteristics of excellent shape selectivity, metal loss resistance, high temperature aggregation resistance and the like, so that the core-shell catalyst has a wide application prospect.

The invention discloses a metal nanoparticle/silicon dioxide composite light catalyst responded by visible light-near-infrared light and a preparation method thereof. 3-aminopropyl triethoxysilane isadopted for modifying spherical SiO2, then the spherical SiO2 is compounded with metal nanoparticles to prepare the metal nanoparticle/silicon dioxide composite light catalyst, and the particle size of SiO2 is 300-600 nm. Under the premise of not changing the size of the metal nanoparticles, the light absorbing character of the metal nanoparticles is regulated by adjusting the size of a carrier toabsorb wide-spectrum solar energy, the optical energy is converted into chemical energy, therefore the obtained composite catalyst can be applied to reduction of photocatalysis aromatic nitro compounds or oxidation of aromatic alcohol compounds under visible light-near-infrared light, and the high catalytic efficiency is achieved.

The invention relates to a preparation method and applications of a mesoporous calcium carbonate medicinal composition modified by hyaluronic acid, for effectively simultaneously realizing targeting, controlled release and ultrasonic therapy and ultrasonic imaging combination, and further realizing diagnosis and treatment integration on cancer. The technical scheme is as follows: the preparation method comprises the following steps: modifying hyaluronic acid on aminated calcium carbonate obtained by reacting mesoporous calcium carbonate and 3-aminopropyl triethoxysilane, and then loading a micromolecular sonosensitizer, thus obtaining the mesoporous calcium carbonate medicinal composition modified by hyaluronic acid. The preparation method has the advantages that a preparation process is simple, a method is stable and reliable, the production cost is low, and the prepared mesoporous calcium carbonate modified by hyaluronic acid and the medicinal composition of mesoporous calcium carbonate simultaneously have the efficacies of tumor targeting, in vitro and in vivo double-stimulation (in acid environment and under high-intensity focused ultrasonic condition) sensitive medicine release, sonodynamic therapy and ultrasonic imaging combined diagnosis and treatment integration, belong to an innovation in tumor treatment medicines, and have enormous economic and social benefits.

The invention belongs to the technical field of fire retardants and mainly relates to a graphene grafted nitrogen, phosphorus and silicon synergistic halogen-free flame retardant and a preparation method thereof. The preparation method comprises the following steps: compounding 3-aminopropyl-triethoxysilane into octa-aminopropyl caged silsesquioxane through a hydrolytic condensation polymerizationprocess; preparing graphene oxide after chemically oxidizing and peeling graphene through an improved hummers process; compounding 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and graphene oxide into a grafted product 1 with an reactivity functional group through an in situ polymerization process; grafting the octa-aminopropyl caged silsesquioxane and the grafted product 1 into the graphenegrafted nitrogen, phosphorus and silicon synergistic halogen-free flame retardant through the in situ polymerization process. The preparation method for the graphene grafted nitrogen, phosphorus andsilicon synergistic halogen-free flame retardant provided by the invention has the advantages of simple preparation process, safety, environmental friendliness, and the like; the graphene grafted nitrogen, phosphorus and silicon synergistic halogen-free flame retardant can be widely used for inflaming retarding in the fields of electronics, automobiles, cables, packaging, aviation, and the like; the graphene grafted nitrogen, phosphorus and silicon synergistic halogen-free flame retardant has a bright application prospect.

The invention discloses a preparation method for an organic inorganic composite ceramic nanofiltration membrane. The preparation method comprises the following steps: grafting 3-aminopropyl triethoxysilane on an alkali activated ceramic membrane; taking piperazine as an aqueous phase monomer, trimesoyl chloride as an organic phase monomer and sodium phosphate or organic diamine as an acid accepting agent; forming an organic functional layer on the surface of the ceramic membrane through interfacial polymerization reaction under the action of an additive, thereby acquiring the organic inorganic composite ceramic nanofiltration membrane. In the invention, an inorganic ceramic monomer is used as a stable base of an organic nanofiltration membrane, is capable of supplying enough chemical andthermal stability and is capable of resisting against solvent and high temperature.

The invention discloses silicon dioxide coated caesium-lead-bromine-perovskite nanocrystal compound and a microwave assisted heating synthesis method thereof. Through a microwave assisted heating way,1,3,5-tri(bromomethyl)benzene, 3-aminopropyl triethoxysilane, lead stearate and cesium carbonate are taken as precursors, and octadecene is taken as a solvent to synthesize CsPbBr3@SiO2 perovskite nanocrystal compound. Compared with CsPbBr3PNCs, the prepared CsPbBr3@SiO2 perovskite nanocrystal compound has very good light-emitting performance. The method has very good repeatability, and providesa brand-new idea for SiO2 coating of CsPbBr3PNCs.

The invention relates to a method for preparing a molecularly imprinted polymer enriched with trace ractopamine. In the method, methanol is used as a solvent, 3-aminopropyl triethoxysilane is used as a functional monomer, tetraethoxy silane is used as a crosslinking agent, an activated silicon ball is used as a carrier, and a surface molecular imprinting technique and a sol-gel technique are utilized to synthesize an adsorptive functional material having high selectivity to the ractopamine. The method has the advantages of simple synthesis method and high adsorption specificity to objects. The functional material prepared by the method can be used for performing quick pretreatment on samples and performing online detection on the ractopamine.

The invention provides a medium immobilized enzyme and a preparation method and application thereof. The medium immobilized enzyme comprises a substrate, a fixed coating and enzyme molecules; wherein the raw materials of the fixed coating include tannic acid and 3-aminopropyl triethoxysilane. By adopting the fixed coating of the medium immobilized enzyme, it can be achieved that enzyme molecules can be fixed while the coating does not easily shed, and the stability is high. The medium immobilized enzyme has high enzyme carrying capacity and high enzyme activity.

The invention relates to the technical field of super-hydrophobic coating, and particularly relates to sprayable super-hydrophobic self-cleaning coating. The sprayable super-hydrophobic self-cleaning coating comprises base coat and filler, wherein the base coat comprises 20-40 parts of polyurethane, 100-200 parts of mixed solvent I and 5-10 parts of 3-aminopropyl triethoxysilane, the filler comprises 40-50 parts of polytetrafluoroethylene powder, 100-200 parts of mixed solvent II and 5 parts of 3-aminopropyl triethoxysilane, and the mixed solvent I and the mixed solvent II comprise reagent-grade acetone, reagent-grade ethyl acetate and reagent-grade dimethylformamide, the volume ratio of which is 1: 1: 1. The sprayable super-hydrophobic self-cleaning coating has excellent performances such as super hydrophobicity, pollution prevention, freezing resistance, sticking prevention, resistance reduction and radiation prevention. Meanwhile, the sprayable super-hydrophobic self-cleaning coating is low in cost, low-pollution and easy to store for a long term and can be sprayed.

The invention discloses a super heat insulation coating loaded with nano titanium dioxide. The super heat insulation coating is prepared from the following raw materials in parts by weight: 38-42 parts of ethyl orthosilicate, an appropriate amount of ethanol and deionized water, 0.1-0.2 part of maleic anhydride, 0.7-0.9 part of hexamethyldisilazane, 0.4-0.5 part of 3-aminopropyl triethoxysilane, 0.4-0.5 part of nano titanium oxide, 70-75 parts of E-12 epoxy resin, 9-12 parts of ethylene glycol diglycid ether and 7-7.5 parts of triethanolamine. The coating disclosed by the invention uses silicon dioxide aerogel and has a super heat insulation property; by loading nano titanium dioxide to the aerogel, the ageing process of the aerogel is retarded, and the service life of the aerogel is prolonged; and by using hexamethyldisilazane to perform modification, the hydrophilic property of the aerogel is improved, and the phenomenon that the aerogel is broken up and degraded by absorbing water is reduced.

The invention relates to a method for surface vulcanization of a spinel nickel lithium manganese oxide positive electrode material. The method comprises the following steps: firstly, dissolving compounds of soluble Li, Ni and Mn into deionized water according to molar ratio, obtaining mixed solution; then, adding a metal ion chelating agent to obtain a gel liquid, drying and grinding to obtain powder, and performing roasting to obtain spinel nickel lithium manganese oxide positive electrode material powder; further dispersing the powder in absolute ethyl alcohol, adding 3-aminopropyl triethoxysilane, performing washing and centrifugal separation after reaction, and obtaining a surface-activated spinel nickel lithium manganese oxide positive electrode material powder after reaction; dispersing the positive electrode material powder and thioacetamide into the absolute ethyl alcohol, regulating a PH value to be 7.5-8.5, performing washing and centrifugal separation after reaction, sintering after drying, and obtaining surface- vulcanized spinel nickel lithium manganese oxide positive electrode material. In the method provided by the invention, surface constituents of the spinel nickellithium manganese oxide positive electrode material are changed effectively through the vulcanization technology, cycle performance and rate capability of the spinel nickel lithium manganese oxide positive electrode material are improved, and the method is easy to be implemented and used in industry.

The invention discloses a corrosion-resistant magnetic composite and a preparation method thereof, wherein the magnetic composite comprises following raw materials, by weight: 28-40 parts of nickel oxide, 13-22 parts of cobaltosic oxide, 4-12 parts of polyphenylene sulfide, 4-10 parts of polypyrrole, 2-6 parts of phenolic resin, 1-8 parts of ferric trichloride, 2-10 parts of attapulgite, 2-7 parts of bismuth oxide, 3-10 parts of barium petroleum sulfonate, 1-6 parts of dicumyl peroxide, 0.2-3 parts of 3-aminopropyl triethoxysilane, and 0.5-2 parts of surface active agents. The magnetic composite by the preparation method has following advantages: good magnetic performance; good corrosion resistance performance under acidic condition; and high application value.

The invention discloses a method for modifying gamma-glutamyl transpeptidase immobilized enzyme by using carrier ampholyte. The method comprises the following steps: in the environment of a toluene solvent, chemically modifying the surface of mesoporous titanium oxide by 3-aminopropyl triethoxysilane to obtain modified mesoporous titanium dioxide; mixing a gamma-glutamyl transpeptidase liquid with mesoporous titanium dioxide to obtain a mixture and oscillating the mixture to obtain immobilized enzyme; mixing the immobilized enzyme with Pharmalyte (CA) and oscillating for reaction; and filtering out raffinate, washing with a buffer solution and performing filtering-drying. According to the method, gamma-glutamyl transpeptidase (GGT) is immobilized with high-specific-surface-area mesoporous titanium oxide as a carrier and the carrying capacity of the carrier is high; the immobilized enzyme is modified by carrier pharmalyte with isoelectric point approximating the optimum pH of GGT; the pH tolerance of the immobilized gamma-glutamyl transpeptidase is improved effectively simultaneously when the stability of the immobilized enzyme is enhanced, and high activity is maintained in the pH range of 6-11.

The present invention discloses a good water resistance aqueous polyurethane adhesive, wherein the raw materials comprise, by weight, 50-60 parts of a modified polyurethane emulsion, 0.06-1.8 parts of polyvinyl alcohol, 0.01-0.08 part of BYK333, 0.01-0.018 part of an aqueous defoamer, 5.9-12.9 parts of kaolin powder, 0.03-0.57 part of titanium dioxide powder, 0.2-3.9 parts of an aqueous curing agent, 0.1-0.3 part of an antioxidant 1010, 0.5-1 part of sodium dodecyl benzene sulfonate, 0.1-0.2 part of an ultraviolet absorber 531, 0.6-1 part of a wetting agent Wet265, 0.3-0.7 part of 3-aminopropyl triethoxysilane, and 0.2-0.4 part of a polysiloxane macromolecule compound. The good water resistance aqueous polyurethane adhesive of the present invention has characteristics of good water resistance, high mechanical strength, and good adhesion.

The invention belongs to the technical field of material preparation and separation and relates to an oxidized graphene/mesoporous silica compound ultrafiltration membrane preparation method and application thereof. The preparation method disclosed by the invention comprises the following steps: firstly, utilizing oxidized graphene, SBA-15, 3-aminopropyl triethoxysilane and dicyclohexyl carbodiimide to prepare a GO-SBA-15 inorganic hybrid material; then mixing polysulfone PSF, polyvinyl pyrrolidone PVP and GO-SBA-15 into N,N-dimethyl formamide DMF to obtain a membrane casting solution, coatingand forming the membrane casting solution on a glass plate through a flow casting method; finally, dipping into prepared coagulating bath to finish a phase separation process to obtain a modified polysulfone ultrafiltration membrane. The water flux of the GO-SBA-15/PSF ultrafiltration membrane prepared by the preparation method disclosed by the invention is remarkably improved; meanwhile, antifouling property of the GO-SBA-15/PSF ultrafiltration membrane is obviously enhanced; the GO-SBA-15/PSF ultrafiltration membrane has good thermal stability, is suitable for rigorous industrialized application environments and can be hopefully applied to industrial water treatment.

The invention relates to a method for assembling differently charged metal nanoparticles onto the surface of a substrate in a bidirectional and controllable manner. The method comprises the followingsteps of (a) placing the substrate into Piranha solution for surface hydroxylation, and washing and then immersing the surface-hydroxylated substrate into a mixed solution of 3-aminopropyl triethoxysilane, ethanol and water for surface positive charge functional group modification to obtain a first modified substrate, wherein the volume ratio of 3-aminopropyl triethoxysilane, ethanol and water inthe mixed solution is 1:50-150:0.5-5; (b) immersing the first modified substrate into succinic anhydride acetone solution for reaction to obtain a second modified substrate; (c) immersing the second modified substrate into metal nanoparticle solutions with different surface charge properties for self-assembly, then extracting, washing and blow-drying the immersed second modified substrate. Therefore, the method for assembling the differently charged metal nanoparticles onto the surface of the substrate in the bidirectional and controllable manner achieves self-assembly of differently charged metal nanoparticles and ensures a bidirectional and controllable process.

The invention discloses a Nafion/amino acid-modified hollow mesoporous silicon hybrid membrane which is constituted by Nafion and amino acid-modified hollow mesoporous silicon. The preparation process comprises the following steps: synthesizing silicon dioxide microspheres, preparing double-layer silicon dioxide microspheres by using hexadecyl trimethyl ammonium bromide as a template, and preparing hollow mesoporous silicon by removing cores and removing the template; reacting hollow mesoporous silicon with 3-aminopropyl triethoxysilane to obtain amino-modified hollow mesoporous silicon; preparing amino acid-modified hollow mesoporous silicon from amino-modified hollow mesoporous silicon and an amino acid under condensation action of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and N-hydroxysuccinimide; and co-mixing amino acid-modified hollow mesoporous silicon with a Nafion solution to obtain a casting solution, and preparing the hybrid membrane by a tape casting method. The preparation process of the hybrid membrane disclosed by the invention is environment-friendly and strong in controllability, and the prepared Nafion/amino acid-modified hollow mesoporous silicon hybrid membrane is applied to direct methanol fuel cells and has relatively high proton conductivity and good methanol permeability.

The invention discloses a preparation method and a storage method of immunomagnetic beads for leucocyte sorting. The preparation method comprises the following specific steps: synthesizing oleic acid-Fe3O4; preparing Fe3O4/PVAc magnetic beads; preparing (Fe3O4/PVA)/SiO2 magnetic beads; dropwise adding 0.4 ml of 3-aminopropyl triethoxysilane into an ethanol suspension of magnetic beads (Fe3O4/PVA)/SiO2, stirring at room temperature for 7 h for amination, separating from a reaction medium by the utilization of an applied magnetic field, and cleaning with an ethanol solution for five times for later use; adding aminated magnetic nano-particles into 50 ml of 3% glutaraldehyde PBS solution, stirring at 37 DEG C for 3 h, modifying the surface of the magnetic particles with aldehyde function group through Schiff base formed between amino group and aldehyde group, separating particles from the reaction medium by the utilization of an applied magnetic field after the reaction, repeatedly washing a product with a PBS solution, dispersing the particles in the PBS solution until final concentration is 8 microgram/microliter; carrying out hydrazino-modification of antibody; and preparing the immunomagnetic beads. The storage method is to store the immunomagnetic beads at 4 DEG C. The invention has advantages of good stability, strong specificity and the like.

The invention discloses a polypropylene electret filter material with efficient filtering and sterilizing performance. The polypropylene electret filter material is prepared from, by weight, 55-65 parts of polypropylene, 9-14 parts of silicon monoxide, 11-17 parts of powdered activated carbon, 2-5 parts of a 3-aminopropyl triethoxysilane coupling agent, 0.5-1.5 parts of glacial acetic acid, a proper amount of deionized water, 1-3 parts of low-density polyethylene wax, 0.5-2 parts of an antioxidant 1010, 0.6-1.4 parts of a titanate coupling agent, 7-10 parts of silicon dioxide and 5-8 parts of far-infrared ceramic powder. According to the polypropylene electret filter material with efficient filtering and sterilizing performance, silicon nanowires containing alpha-quartz are prepared and added into a melt-blow polypropylene electret material, and the melt-blow polypropylene electret material has excellent filtering efficiency and a remarkable bacterium propagation suppressing function; active carbon is used for carrying the silicon nanowires treated with the silane coupling agent, so that the carrying amount of active carbon on the silicon nanowires is increased, and more harmful substances in air can be effectively adsorbed by the filter material.