31 results about "Octadecyltrimethoxysilane" patented technology

The invention discloses a nanoprobe applied to <19>F magnetic resonance imaging and photothermal therapy and a preparation method of the nanoprobe. According to the invention, a one-step packaging method is adopted, and perfluor crown-ether is fixed to nano-particles Cu1.75S through polysuccinimide modified by alkyl chains and trimethoxyoctadecylsilane, so that the nanoprobe applied to <19>F magnetic resonance imaging and photothermal therapy is obtained. According to the nanoprobe synthetize by adopting the preparation method, due to the inside Cu1.75S core, and polyamino acid and silicon layers coating the surface, the nanoprobe has relatively high biological stability. The in-vivo magnetic resonance imaging and the photothermal therapy effects prove that the nanoprobe is expected to serve as a multi-function reagent for carrying out the local photothermal therapy under the guidance of the <19>F magnetic resonance imaging with high sensitivity, the result can attract extensive attention in the fields of material science, nanometer science, biological medicine and the like, and the nanoprobe is suitable for being applied in biomedical detection.

The invention discloses a phosphorus-doped ultrathin hollow carbon nitride nanosphere catalyst for hydrogen production by efficient photocatalytic cracking of water, and belongs to the field of catalytic chemistry and nanoscience. The catalyst is prepared according to the following steps: firstly, by taking tetraethyl orthosilicate and octadecyltrimethoxysilane as precursors and ethanol, ammonia water and water as solvents, preparing a SiO2 template by utilizing a method; then taking cyanamide as a precursor, and preparing a hollow carbon nitride nanosphere (H-CNS) carrier through a negative pressure ultrasonic method; and finally, with red phosphorus as a phosphorus source and a chemical vapor deposition method, depositing phosphorus atoms on the H-CNS carrier, so as to obtain the phosphorus-doped P/UH-CNS composite catalyst. In the preparation process, the pressure difference generated on the inner surface and the outer surface of the H-CNS carrier can thin the shell of the originally loose H-CNS carrier. The material is novel, the preparation process is simple, the product morphology is regular and controllable, and the catalyst shows good photocatalytic hydrogen production activity and stability.

The invention discloses a novel hydrophobic modified nano-silicon material, aiming to solve the problem that the oil field injecting nano-silica material can not be applied to the polymer injection well and the alkaline-surfactant-polymer flooding injection well. The novel hydrophobic modified nano-silicon material is prepared according to the following steps: adding absolute alcohol into water-dispersible nano-silicon, dropwise adding the ethanol solution of silane coupling agent, and finally dropwise adding 1% of the ethanol solution of trimethoxyoctadecylsilane, wherein the mass of the ethanol solution of silane coupling agent is 0.5-2% of that of the nano-silicon. The novel hydrophobic modified nano-silicon material can be uniformly dispersed into a variety of solvent media including water, isopropyl alcohol, ethanol, ethylene glycol, xylene and acetone and can form a super-hydrophobic layer on the surface of the rock core.

The invention discloses a preparation method of a cornstalk fiber material for an asphalt road and application thereof and relates to a preparation method of fiber modified asphalt materials applied to asphalt pavements, which aims to solve the problem that the pavement performance of the conventional asphalt concrete doped with plant fibers needs to be improved. The preparation method comprises the following steps: 1, separating husks of plant cornstalks; 2, crushing and grinding cornstalk husks to obtain cornstalk fibers; 3, immersing the cornstalk fibers into a sodium hypochlorite solution;4, adding the cornstalk fibers into a cerous nitrate ethanol solution, adding an ethanol solution of sodium hydroxide, and drying to obtain a cornstalk fiber material adsorbed with ceric oxide nanoparticles; 5, adding the cornstalk fiber material into a normal hexane solution of octadecyltrimethoxysilane to hydrolyze; and 6, doping a flame retardant. The cornstalk fiber material is applied to asphalt paste, the fibers are uniformly dispersed, the stalk fibers have excellent oil absorption properties, and the thermal stability is excellent.

The invention discloses mesoporous carbon-coated silicon negative electrode material preparation, product and application. After nanometer silica fume is subjected to ultrasonic dispersion, tetraethoxysilane and octadecyltrimethoxysilane are added, stirring at room temperature is carried out, centrifugation and firing are carried out, and nanometer silicon with the surface coated with mesoporous silicon is obtained. With the mesoporous silicon-coated nanometer silicon as a template, a carbon source and an organic solvent are added, mixing and calcinations are carried out to realize carbonization, and mesoporous carbon-coated silicon composite powder is obtained. The composite powder is washed in a hydrogen fluoride solution, mesoporous silicon and silicon oxides are removed, and after drying, a mesoporous carbon-coated silicon negative electrode material is obtained. The particle size of the mesoporous carbon-coated silicon negative electrode material obtained in the method is 50 to 80nm, the material is assembled into a button cell, and through test, the material has high reversible capacity, excellent multiplying power performance and high cycle stability.

The invention discloses a preparation method for compound fertilizer special for high-yield green rice. The preparation method comprises the following steps that chicken manure, decomposed cow dung, camellia oil cakes, peanut shell powder, straw powder, zeolite powder and calcined kaolin are uniformly mixed, water is added, an EM strain stock solution is added, complete mixing is carried out, andfermenting is carried out so as to obtain a fermented material; and EDTA(ethylene diamine tetraacetic acid) chelated manganese, ferric nitrate hexahydrate, ammonium sulfate, ammonium hydrogen phosphate, plant ash, calcium-magnesium phosphate fertilizer, gypsum powder and a hydrophobic slow-release agent are added in the fermented material, uniform mixing is carried out, and granulating and dryingare carried out so as to obtain the compound fertilizer special for the high-yield green rice, wherein the hydrophobic slow-release agent is prepared through a process which comprises the following steps of uniformly mixing silicon dioxide hydrogel, dodecyltrimethylammonium bromide, fatty alcohol-polyoxyethylene ether and water, sequentially adding alpha,omega-dihydroxy polydimethylsiloxane, octadecyltrimethoxysilane and oxidized polyethlene wax in a stirring state, carrying out stirring continuously and carrying out homogenizing treatment so as to obtain the hydrophobic sustained-release agent.

The invention discloses a water-in-oil type cosmetic product based on camellia oleifera component and a preparation process thereof; the preparation process comprises the following steps: placing camellia oleifera essential oil in a compressor, concentrating to 2/3 in vacuum, and then performing natural cooling or blast-cooling to room temperature for later use; sequentially adding ginseng polysaccharide, collagen polypeptide, an oil-in-water emulsion matrix, octadecyltrimethoxysilane, glycerol monolaurate and propylene glycol fatty acid ester into the concentrated camellia oleifera essential oil at room temperature, performing stirring at a high speed by using a stirrer, emulsifying and uniformly performing mixing to prepare a mixed reaction solution; and putting the mixed reaction liquid, a humectant, a thickening agent, an ultraviolet light absorber and a preservative into a stirrer under sterile, disinfection and cleaning operation conditions, and removing essential oil suspended on the surface to obtain the water-in-oil type cosmetic product. According to the invention, the ultraviolet light absorber is mixed, so that the light stability and the good ultraviolet light absorption effect are realized, the use performance is further improved, the skin irritation can be reduced, and the application range is wide.

The invention discloses a compound fertilizer for promoting increase of the yield and quality of organic rice. The compound fertilizer comprises the raw materials in parts by weight: 20-35 parts of ammonium chloride, 4-12 parts of a kiln ash potash fertilizer, 10-20 parts of ground phosphate rock, 40-80 parts of an organic fertilizer, 0.1-0.2 part of EDTA chelated manganese, 0.2-0.4 part of iron hexaurea trinitrate, 6-10 parts of a slow-release agent and 1-3 parts of ultra-fine toughening powder. The ultrafine toughening powder is prepared by the following processes: mixing silica hydrogel, dodecyl trimethyl ammonium bromide, fatty alcohol-polyoxyethylene ether and water evenly, then adding oxidized polyethylene wax, an ionic emulsifier and sodium pyrosulfite, mixing, introducing nitrogengas and pressurizing in a sealed state, heating, stirring, discharging, cooling, adding octadecyltrimethoxysilane in a stirring state, continuing to stir, and filtering to obtain ultra-fine toughenedpowder. The compound fertilizer can improve the quality of rice, reforms the structure of soil aggregates, makes soil looser, prevents soil hardening and raises soil fertility.

The invention discloses a hydrophobic silicon quantum dot capable of being subjected to surface chemical modification. The surface of the hydrophobic silicon quantum dot contains hydroxyl and amino. The preparation method of the hydrophobic silicon quantum dot comprises the following steps: dissolving a silicon source and tannic acid in ultrapure water, carrying out stirring for reaction, adding absolute ethyl alcohol into the obtained silicon quantum dot solution, adding octadecyl trimethoxy silane for reaction, separating out solid, carrying out filtering, and carrying out washing and dryingto obtain the hydrophobic silicon quantum dot. The prepared silicon quantum dot is high in purity, good in water solubility and good in stability, the surface of the silicon quantum dot can be subjected to various chemical modifications at a same time, can be complexed with various metal ions, has hydrophobicity, cannot deteriorate after long-term placement at room temperature, and has good anti-tumor activity. The preparation method has the advantages of low temperature requirement, easy control, high reaction efficiency, simple preparation, easily available raw materials, low cost and easyrealization of industrial production. The invention also discloses an application of the hydrophobic silicon quantum dot in the fields of biological imaging and anti-cancer drug preparation.

The invention provides a cleaning agent for new energy automobiles. The cleaning agent comprises the following components in parts by weight: 15-20 parts of octadecyltrimethoxysilane modified polyquaternium-10, 10-15 parts of cetyl myristoleate modified 2-[5-[1,1-dimethyl-3-(4-sulfobutyl)-1,3-dihydrobenzo[e]indol-2-ylidene]-amyl-1,3-dinenyl]-1,1-dimethyl-3-(4-sulfobutyl)-1H-benzo[e]indol onium inner salt sodium salt, 15-20 parts of C12-C14 fatty alcohol-polyoxyethylene ether modified polymethyltriethoxysilane and 40-50 parts of water. The invention further discloses a preparation method of thecleaning agent for the new energy automobiles. The disclosed cleaning agent for the new energy automobiles has excellent comprehensive performance, the cleaning effect is obvious, the cleaning efficiency is high, the using amount and the water adding amount are small, the protective effect to car paint is good, and meanwhile, the advantages of luster enhancement, static electricity resistance anddust prevention are achieved.

The invention discloses an in-situ ultrasonic flame-retardant protection method for a wood structure ancient building in the northwest region, and belongs to the technical field of wood structure flame retardance. The method is characterized in that according to a biomineralization principle, ultrasonic waves are used as driving force, water and ethyl alcohol are used as flame retardant carrying solvents, and in-situ flame-retardant modification is conducted on wood through a sol-gel method; through permeation treatment of octadecyltrimethoxysilane on a wood component, the octadecyltrimethoxysilane and the wood component fibers form an interactive three-dimensional network structure in a wood component matrix through hydrogen-bond interaction, and the network structure not only has an excellent fiber reinforcing effect, but also can effectively immobilize zinc phytate in the wood component matrix, so that the stability of the wood component matrix is improved; ultrasonic waves can be used for opening a new reaction channel due to the characteristics of good directivity, moderate vibration frequency range, low energy transfer attenuation and the like; and the flame-retardant modification treatment on the wood material of the ancient wood-structure building is realized by physical and chemical methods under the condition of minimum intervention.