35 results about "Octadecyltrichlorosilane" patented technology

The invention belongs to the technical field of chromatographic filling, and particularly relates to mesoporous silica microspheres, a preparation method and application. According to the preparation method, tetraethylenepentamine functional modified template microspheres and oligomeric silica anions generated by hydrolysis of a silicon source are subjected to an electrostatic anchoring effect, so that self-nucleation of the silicon source is inhibited; the surface of the template microsphere is covered by a lying configuration, so that the steric hindrance is reduced, the diffusion of a silicon precursor in a silicon source solution is promoted, and the yield of the mesoporous silica microsphere is improved; the surface of mesoporous silica is grafted and modified by octadecyl trichlorosilane silicon hydroxyl to form a highly crosslinked Si-O-Si skeleton, so that the mechanical strength of the microspheres is improved, the column efficiency loss is reduced, and the comprehensive yield and performance of high performance liquid chromatography are improved.

The invention discloses a method for high-selectivity synthesis of ethylene sulfate from ethylene sulfite. An organosilane functional group is introduced to the surface of a TS-1 molecular sieve, the hydrophilic and hydrophobic degree of TS-1 is regulated and controlled, water is effectively prevented from being enriched around TS-1, and DTD hydrolysis side reaction is reduced, so that the stability and oxidation performance of the catalyst are improved, and the dispersity of TS-1 in a system is improved. The TS-1 treated by octadecyl trichlorosilane has moderate-strength hydrophobicity, so that the adsorption of substrates ES and H2O2 on the surface of the catalyst can be ensured, the aggregation of H2O molecules on the surface can be reduced, and the hydrolysis of DTD on the surface of the catalyst is inhibited. When the modified TS-1 molecular sieve catalyzes an ES oxidation reaction, DTD selectivity can reach 95% or above, and the modified TS-1 molecular sieve has good stability and reusability. The method is simple to operate, low in cost and suitable for large-scale industrial production.

The invention relates to the field of biomimetic materials, in particular to a biomimetic self-cleaning anti-fouling aquaculture net cage material, a preparation method and application of the biomimetic self-cleaning anti-fouling aquaculture net cage material. 0.5 to 2.0 parts by weight of a carboxylated graphene nanosheet; 2.0 to 5.0 parts by weight of nitrogen-doped titanium dioxide nanoparticles; 1.0 to 3.0 parts by weight of silica nanoparticles; 5.0 to 10.0 parts by weight of calcium ion cross-linked modified sodium alginate; 1.0 to 3.0 parts by weight of octadecyl trichlorosilane; 0.5 to 1.5 parts by weight of lauryl sodium sulfate; through the synergistic effect of a double bionic structure and enhanced photocatalysis, the effective inhibition on attachment of various organisms is realized, and the inhibition rate on attachment organisms such as algae, bacteria and barnacles reaches 75% or above.

The invention belongs to the field of conductive films, and discloses a high-oxidation-resistance silver nanowire transparent composite conductive film and a preparation method thereof.According to the transparent composite conductive film, the two sides of a conductive film containing silver nanowires are each sequentially provided with an anti-ultraviolet layer and a hydrophobic protection layer; the conductive thin film containing the silver nanowires is an AgNWs / PEDOT: PSS conductive thin film obtained by performing film forming on a mixed solution of the silver nanowires AgNWs and modified PEDOT: PSS; the anti-ultraviolet layer is a nano ZnO / PI layer obtained by film forming of a mixed solution of nano ZnO and polyimide PI; and the hydrophobic protective layer is an OTS layer formed by soaking the conductive thin film on which the anti-ultraviolet layer is formed in octadecyl trichlorosilane OTS. According to the transparent composite conductive film, the oxidation resistance is remarkably improved while high light transmittance is kept, good mechanical flexibility and conductivity are shown, and the transparent composite conductive film has wide application prospects in the fields of electronic devices and transparent electrodes.

The present invention relates to the technical field of polyurethane hydrophobic materials, and discloses a preparation method and application of a hydrophobically modified polyurethane nanocomposite material, comprising the following steps: (1) mixing polytetrahydrofuran, polypropylene glycol, and isophorone diisocyanate for reaction; (2) adding dihydroxy-terminated polydimethylsiloxane or glycerol monostearate to the reaction solution for reaction, then adding a chain extender for reaction, and adding triethylamine for neutralization to obtain a modified waterborne polyurethane emulsion; (3) adding SiO2 powder to octadecyltrichlorosilane for reaction to obtain hydrophobic SiO2 powder; (4) adding the hydrophobic SiO2 powder to ethyl acetate to obtain a first mixed solution; adding the modified waterborne polyurethane emulsion to ethyl acetate to obtain a second mixed solution; and adding the first mixed solution to the second mixed solution to obtain a hydrophobically modified polyurethane nanocomposite material. The present invention combines modified waterborne polyurethane with nano-SiO2 to achieve good hydrophobicity and durability.

The invention discloses a radiation evaporation synergetic cooling structure integrated Janus fiber membrane and a preparation method thereof, a PET fiber membrane with good mechanical strength, toughness resistance and other performances is selected as a substrate fiber membrane, CaHPO4 is loaded on the surface of the PET fiber membrane, the PET fiber membrane is modified, the hydrophilic performance, sunlight reflectivity and infrared thermal emissivity of the PET fiber membrane are enhanced, and the radiation evaporation synergetic cooling structure integrated Janus fiber membrane is prepared. And spraying octadecyl trichlorosilane on the PET fiber membrane loaded with CaHPO4 by adopting a spraying process, and depositing a netted hydrophobic coating inner layer and a netted water transmission channel which are uniformly and regularly arranged on a single side, thereby obtaining the structure integrated Janus fiber membrane. The structure-integrated Janus fiber membrane provided by the invention not only has the function of radiation cooling cooperating with evaporation cooling and the function of directional water transmission, the directional water transmission index R is as high as 991%, and the original excellent performance of the PET fiber membrane is reserved.

The application belongs to the field of high polymers, and discloses a magnetic photothermal hydrophobic melamine sponge as well as a preparation method and application thereof. The preparation method is specifically as follows: melamine sponge is soaked in a mixed solution of Fe3O4, gallic acid and FeCl3 for 1h-5h, the adsorbed solution is squeezed and dried at 60 DEG C to obtain a magnetic melamine sponge, then the magnetic melamine sponge is soaked in a pyrrole solution for 30min-2h, the adsorbed solution is squeezed and dried at 60 DEG C to obtain a magnetic photothermal melamine sponge, then the magnetic photothermal melamine sponge is soaked in an octadecyltrichlorosilane alcohol aqueous solution for 1h-5h, the adsorbed solution is squeezed and dried at 60 DEG C to obtain a magnetic photothermal hydrophobic melamine sponge, which has the advantages of simple preparation process, energy saving, green environmental protection and low product cost. The magnetic photothermal hydrophobic melamine sponge can not only effectively separate oil-water mixture under magnetic driving, but also recover high-viscosity oil.

The invention relates to a preparation method of a solid-phase extraction membrane and a product thereof, and the preparation method comprises the following steps: immersing a quartz fiber membrane into a polymer solution with a solid-phase extraction function, taking out the membrane, and naturally drying, heating and drying, drying at low temperature or immersing the membrane into a non-solvent of the polymer to obtain the solid-phase extraction membrane taking the polymer as an extraction function material; or immersing the quartz fiber membrane in an acid solution or an ethylene-vinyl alcohol copolymer or a polyvinyl alcohol solution for a certain time, then taking out the quartz fiber membrane, washing and drying the quartz fiber membrane, then bonding octadecyl trichlorosilane or octadecyl trichlorosilane in dry toluene by using triethylamine as a catalyst, and then carrying out tail sealing by using trimethylchlorosilane, so as to obtain the quartz fiber membrane. The solid-phase extraction membrane bonded with octadecyl or octaalkyl is obtained. The used quartz fiber base membrane is high in purity, solid-phase extraction membranes of various materials and specifications can be obtained by adopting the method, and the requirements of analysis and test pretreatment can be met.

The invention particularly relates to a modification method of an electrochemical sensing electrode capable of resisting sebum pollution and a wearable sweat sensor, and belongs to the technical field of sweat detection. According to the method, for a Ni-HHTP metal organic framework (MOF) conductive electrode, the surface hydrophilicity and underwater oleophobicity of the Ni-HHTP metal organic framework (MOF) conductive electrode are regulated and controlled through plasma cleaning or octadecyl trichlorosilane (OTS) modification, the super-hydrophilic / underwater oleophobicity surface is obtained, and sebum pollution is effectively inhibited. The sensor adopts a laminated structure formed by bonding a flexible substrate, an electrode chip and a micro-fluidic sweat collection layer. According to the invention, active regulation and control of surface performance are realized, an anti-pollution-interface structure-function relationship is clarified, the sensing electrode with high pollution resistance and sensitivity is prepared, and the long-term stability and reliability of the wearable sweat sensor are remarkably improved.

The invention belongs to the field of high-performance oil-water separation composite materials, and particularly relates to a multifunctional super-hydrophobic melamine sponge based on a core-shell metal organic framework structure as well as a preparation method and application of the multifunctional super-hydrophobic melamine sponge. The multifunctional super-hydrophobic melamine sponge is prepared by coating the core-shell structure copper sulphide coated CuFe-MOF, polyvinyl alcohol and octadecyl trichlorosilane on a melamine sponge. The prepared sponge shows excellent hydrophobicity and efficient oil-water separation capacity, the water contact angle of the sponge is as high as 157.4 degrees, and the oil-water separation efficiency can still be maintained at 98.9% after 20 times of circulating oil absorption. The temperature of the sponge can be rapidly increased to 112.5 DEG C under simulated sunlight irradiation, and the adsorption capacity of thickened oil is remarkably improved. And the sponge also has the capability of catalyzing a photo-Fenton reaction, and can effectively adsorb pollutants in seawater. The sponge provided by the invention provides an environment-friendly and efficient new scheme for treating viscosity reduction and magnetic drive oil absorption of high-viscosity crude oil.

The invention discloses a super-hydrophobic membrane for boiler feed water oxygen removal and a preparation method thereof.The preparation method comprises the steps that octadecyl trichlorosilane is dissolved in n-octane, surface spraying is conducted with a commercial polyvinylidene fluoride (PVDF) membrane as a base membrane, and after spraying is completed, the PVDF membrane is dried; the preparation method comprises the following steps: adding zinc oxide nanoparticles into n-octane for ultrasonic dispersion, adding perfluorodecyl trichlorosilane in a stirring state to obtain fluorinated zinc oxide, and spraying the fluorinated zinc oxide on a PVDF film to form a micro-nano composite structure on the surface of the film, thereby greatly enhancing the hydrophobicity of the film. When the membrane prepared by the method is applied to a boiler make-up water deoxygenization process, the removal rate of oxygen in water can be effectively improved.

The present invention discloses a high-throughput analysis method for phthalate plasticizers based on thin-film microextraction technology, belonging to the technical field of physical and chemical inspection of phthalate plasticizers. The high-throughput analysis method is as follows: after surfactants, urea, tetraethyl orthosilicate, isopropanol, and cyclohexane are added to water and react, they are calcined to obtain nano-mesoporous silica; octadecyltrichlorosilane is used as a modifier to react with the activated mesoporous silica to obtain C18-modified mesoporous silica; then trimethylchlorosilane is used as a capping reagent for capping to obtain C18-modified nano-mesoporous silica; the C18-modified nano-mesoporous silica and polyacrylonitrile are respectively dispersed in DMF, and after mixing, they are sprayed and cured to obtain a microextraction thin film; it is installed in a high-throughput oscillating extraction device, and after the sample undergoes the thin-film microextraction analysis process, reverse-phase liquid chromatography is used for analysis to calculate the content. This method can meet the high-throughput, efficient, and rapid analysis of phthalate esters in a large number of samples.

The invention discloses high-corrosion-resistance stainless steel and a machining process thereof, and relates to the technical field of stainless steel. Through solution treatment and pretreatment, the gas nitriding efficiency is improved, and the surface hardness and corrosion resistance of the corrosion-resistant stainless steel are enhanced. The stainless steel is treated through the electro-deposition liquid, the coating containing nickel, cerium, nano silicon dioxide, the nano carbon nitride-organic framework composite material and zirconium is electro-deposited on the surface of the stainless steel, and the corrosion resistance of the corrosion-resistant stainless steel is enhanced. According to the invention, melamine is calcined at a high temperature to prepare anti-corrosion nano carbon nitride with a lamellar structure, and then octadecyl trichlorosilane is used for modifying the anti-corrosion nano carbon nitride, so that the hydrophobicity and dispersity of the nano carbon nitride are enhanced. Potassium fluozirconate is added into the electro-deposition liquid, and the addition of polyaspartic acid on the nano carbon nitride-organic framework composite material promotes the deposition of the zirconium element, so that the zirconium element is deposited on the surface of the stainless steel band, and the corrosion resistance of the stainless steel band is further enhanced.

The invention discloses a water-based super-hydrophobic finishing agent based on microemulsion in-situ synthesis as well as a preparation method and application of the water-based super-hydrophobic finishing agent. According to the method, octadecyl trichlorosilane, a surfactant and a cosurfactant firstly form an oil-phase mixture, then water is added to form an oil-in-water type microemulsion, finally standing and aging are performed, silane is subjected to in-situ hydrolysis in a microemulsion nanoreactor, and the water-based super-hydrophobic finishing agent is prepared through a one-step method. An organic solvent reaction medium is completely abandoned, and the process is simple and environment-friendly. The obtained finishing agent is uniform in particle and good in stability, can endow the polyester fiber fabric with a super-hydrophobic surface with a contact angle greater than 158 degrees and a rolling angle less than 4 degrees after being used for treating the polyester fiber fabric, is excellent in wear resistance and durability, and has a wide industrial application prospect.

The invention discloses a highly corrosion-resistant stainless steel and a processing technology thereof, and relates to the technical field of stainless steel. The invention improves the gas nitriding efficiency by solution treatment and pretreatment, and enhances the surface hardness and corrosion resistance of the corrosion-resistant stainless steel. The invention treats the stainless steel by an electrodeposition liquid, and electrodeposit a coating containing nickel, cerium, nano silicon dioxide, nano carbon nitride-organic skeleton composite material, and zirconium on the surface of the stainless steel, thereby enhancing the corrosion resistance of the corrosion-resistant stainless steel. The invention uses melamine to calcine at a high temperature to prepare an anti-corrosion nano carbon nitride with a lamellar structure, and then uses octadecyltrichlorosilane to modify it, thereby enhancing the hydrophobicity and dispersibility of the nano carbon nitride. Potassium fluorozirconate is added to the electrodeposition liquid, and the addition of polyaspartic acid on the nano carbon nitride-organic skeleton composite material promotes the deposition of zirconium elements, so that zirconium elements are deposited on the surface of the stainless steel strip, further enhancing the corrosion resistance of the stainless steel strip.

The present invention belongs to the technical field of semiconductor optoelectronic materials, specifically a sheet-like full-dimensional perovskite single crystal and its preparation method and application. The method of the present invention comprises: preparing a perovskite precursor solution and keeping it warm; dripping a trace amount of the perovskite precursor solution onto a hydrophobic substrate; self-assembling at the solution-air interface, controlling the growth time to complete the crystal growth; and preparing a perovskite single crystal with full structural dimensions according to different raw materials. The present invention utilizes octadecyltrichlorosilane to increase the surface tension of the droplets. Compared with the planar droplets, the curved droplets promote the anisotropic growth of low-dimensional and even three-dimensional perovskites. The present invention overcomes the problems of low aspect ratio of existing low-temperature grown single crystals and inability to be used in planar optoelectronic devices, and the preparation process is simple and efficient; the obtained single crystal has the characteristics of high quality, high aspect ratio, etc., emits symmetrical fluorescence peaks at room temperature, and has excellent optoelectronic properties; it can be widely used in the field of photoelectric detection.

Disclosed is a coating composition that includes at least one silane or functionalized silane, and at least one electroactive or electroconductive polymer, and optionally a solvent. In particular, the coating composition comprises a mixture of octadecyltrichlorosilane and poly(3,4-ethylenedioxythiophene):polystyrene sulfonate.

The invention discloses a wear-resistant super-hydrophobic anti-drag coating material, a preparation method and an application method, and belongs to the technical field of super-hydrophobic anti-drag coatings. Diatomite is subjected to octadecyl trichlorosilane (OTS) covalent grafting, then hydrophobically modified diatomite, PFA nano powder and absolute ethyl alcohol are compounded into a diatomite-PFA-alcohol suspension, FEVE, a polyisocyanate curing agent and absolute ethyl alcohol are compounded into a fluorocarbon resin mixed solution containing curing components, and the wear-resistant super-hydrophobic anti-drag coating material is obtained after mixing. When the coating material is applied, a laser etching technology is adopted to etch a surface texture with square micro-grooves distributed in a latticed mode on the surface of a base body, and the surface texture suitable for spraying of the wear-resistant super-hydrophobic anti-drag coating material is formed by optimizing the side length and the distance of the micro-grooves; after the wear-resistant super-hydrophobic anti-drag coating material is sprayed, the'armor-rectangular frame 'structure in the coating shows excellent wear resistance and super-hydrophobic property retention capability.

This invention belongs to the field of organic semiconductor material preparation technology, and discloses a one-dimensional ultrathin organic single-crystal array thin film, its preparation method, and its application. The preparation method of the one-dimensional ultrathin organic single-crystal array thin film includes the following steps: patterning a substrate with octadecyltrichlorosilane or perfluorosilane, then adding a first organic semiconductor solution and performing a first coating with a doctor blade, followed by adding a second organic semiconductor solution and performing a second coating with a doctor blade to obtain the one-dimensional ultrathin organic single-crystal array thin film; the thickness of the prepared one-dimensional ultrathin organic single-crystal array thin film is 1nm-15nm. This invention achieves stable formation of one-dimensional organic single-crystal arrays and precise control of ultrathin film and high orientation, and the process is suitable for large-scale industrial production, providing reliable technical support for the research and development and application of high-performance organic electronic devices.

The present invention discloses a nano-silk fibroin membrane with directional water transport and its preparation method. Renewable pure silk fibroin protein is extracted from natural silkworm cocoons and electrospun to form a nanofiber-like silk fibroin membrane. The membrane is then treated with methanol to induce a secondary structural transformation, resulting in hydrophilic and hygroscopic properties. Octadecyltrichlorosilane (OTS) is then sprayed onto the membrane, depositing a uniformly arranged, reticulated hydrophobic inner layer and reticulated water transport channels on one side. The resulting OTS-coated membrane exhibits excellent directional water transport, with a directional water transport index (R) as high as 978%. The preparation method achieves directional water transport while maintaining the mechanical and radiant cooling properties of the original silk fibroin membrane. Furthermore, the preparation method is environmentally friendly, simple, and scalable.

The invention belongs to the technical field of organic semiconductor material preparation, and discloses a one-dimensional ultrathin organic single crystal array film and a preparation method and application thereof.The preparation method of the one-dimensional ultrathin organic single crystal array film comprises the following steps that a substrate is subjected to patterning treatment through octadecyl trichlorosilane or perfluorosilane; then dropwise adding a first organic semiconductor solution, carrying out first blade coating by adopting a scraper, then dropwise adding a second organic semiconductor solution, and carrying out second blade coating by adopting the scraper to obtain a one-dimensional ultrathin organic single crystal array film; the thickness of the prepared one-dimensional ultrathin organic single crystal array film is 1 nm to 15 nm. According to the method, stable formation of the one-dimensional organic single crystal array and precise control over the ultrathin thin film and the high orientation degree are achieved, the process is suitable for industrial large-scale production, and reliable technical support is provided for research, development and application of high-performance organic electronic devices.

The invention relates to the field of unsaturated resin compositions, and discloses an unsaturated resin composition for artificial stone and a preparation method thereof, the unsaturated resin composition comprises unsaturated resin, a modified additive, maleic anhydride and a curing agent; the unsaturated resin comprises unsaturated polyester and a polymerizable monomer, the unsaturated polyester is a polymerization product of polyacid and polyol, and the polymerizable monomer comprises a styrene monomer; the modified additive is prepared by grafting modified lignin and octadecyl trichlorosilane on the surface of nano titanium dioxide, and the modified lignin is prepared by carrying out grafting reaction on oxidized lignin, p-phenylenediamine and DOPO (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) and then further grafting with terephthalaldehyde, gamma-aminopropyltriethoxysilane and DOPO. The modified additive and maleic anhydride are added into the unsaturated resin-based material, so that the problems of appearance yellowing, water resistance and flame retardance of the material are solved, the defects of performance aging, mechanical property reduction and the like of the material are inhibited, and the service life of the artificial stone is effectively prolonged.

The invention discloses a radial mesoporous core-shell silica microsphere modified C18 chromatographic filler with adjustable shell thickness as well as a preparation method and application thereof, and belongs to the technical field of chromatographic separation materials. The method comprises the following steps: dispersing monodisperse non-porous silicon dioxide microspheres, a template agent and an electrolyte in a water phase, and adding a basic catalyst to form a uniform system; then adding an oil phase, a pore-enlarging agent and a silicon source, carrying out a reaction on an oil-water two-phase interface, and carrying out in-situ growth on the surface of the microsphere to form a silicon dioxide shell layer with a radial mesoporous structure by adjusting at least one parameter of the addition amount of the silicon source, the addition amount of the electrolyte and the volume ratio of water to oil so as to realize regulation and control of the thickness of the shell layer; and carrying out post-treatment to remove the template agent, carrying out acidification activation, and carrying out a reaction with octadecyl trichlorosilane to carry out C18 bonding so as to obtain the target chromatographic filler. The filler has a monodisperse core-shell structure, and the thickness of a shell layer can be accurately regulated and controlled in a range of 90.78 nm to 251.93 nm. The filler disclosed by the invention shows high column efficiency, rapid separation and good stability on alkylbenzene, polycyclic aromatic hydrocarbon and phthalate compounds in a reversed-phase chromatography mode.

The present invention belongs to the field of chromatography filling technology, and specifically relates to a kind of mesoporous silica microspheres, preparation method and application. The present invention utilizes tetraethylenepentamine functionalized modified template microspheres to generate electrostatic anchoring with oligosiloxane anions generated by hydrolysis of silicon source, thereby inhibiting silicon source nucleation; by covering the surface of the template microspheres in a lying configuration, the steric hindrance is reduced, the diffusion of silicon precursors in the silicon source solution is promoted, and the yield of mesoporous silica microspheres is increased; by grafting octadecyltrichlorosilane silanol groups to modify the surface of the mesoporous silica, a highly cross-linked Si-O-Si skeleton is formed, thereby improving the mechanical strength of the microspheres, reducing column efficiency loss, and improving the comprehensive yield and performance of high performance liquid chromatography.

The present invention discloses a gas diffusion layer and a preparation method thereof, which relate to the technical field of hydrogen fuel cell materials, in order to solve the shortcomings of gas diffusion layers that are prone to moisture accumulation or excessive moisture loss. A water-blocking slurry is coated on the surface of hydrophobic carbon paper to form a water-blocking layer, wherein the water-blocking slurry comprises a water-blocking coating formed by polymerization of octadecyltrichlorosilane and water; a water-retaining slurry is coated on the surface of the water-blocking layer to form a water-retaining layer to obtain a prefabricated diffusion layer; and the prefabricated diffusion layer is sintered to obtain the gas diffusion layer. The present invention provides a gas diffusion layer and a preparation method thereof, which are used to prepare a gas diffusion layer that has sufficient moisture to keep the proton membrane moist and can avoid moisture accumulation that hinders gas transmission.

This application relates to the field of acrylic sheet technology, and discloses an acrylic sheet and its preparation method. The acrylic sheet comprises 100 parts of methyl methacrylate monomer; 0.05-0.5 parts of initiator; 0.1-0.8 parts of chain transfer agent; 0.1-1.0 parts of ultraviolet absorber; 0.05-0.5 parts of light stabilizer; 0.01-0.1 parts of release agent; and 0.5-3 parts of nano-silica modified particles. The nano-silica modified particles have a particle size of 20-60 nm, and their surface undergoes a double modification treatment. In the double modification process, the first modifier is γ-methacryloyloxypropyltrimethoxysilane, and the second modifier is octadecyltrichlorosilane or isopropyltris(dioctylpyrophosphate)titanate. This application successfully overcomes the constraints between light transmittance, internal stress, and weather resistance in the prior art, and provides an acrylic sheet with excellent comprehensive performance and suitable for industrial production, as well as its preparation method.

The application discloses a structure-integrated Janus fiber membrane with radiation evaporation and cooling synergy and a preparation method thereof. A PET fiber membrane with good mechanical strength, toughness and other performances is selected as a base fiber membrane, CaHPO4 is loaded on the surface of the PET fiber membrane to modify and enhance the hydrophilic performance, solar reflectivity and infrared thermal emissivity of the PET fiber membrane, octadecyltrichlorosilane is sprayed on the PET fiber membrane loaded with CaHPO4 by using a spraying process, and a uniform and regular arranged reticular hydrophobic coating inner layer and a reticular water transmission channel are deposited on one side, so that the structure-integrated Janus fiber membrane is prepared. The structure-integrated Janus fiber membrane provided by the application not only has the functions of radiation cooling and evaporation cooling synergy and the function of directional water transmission, and the directional water transmission index R is as high as 991%, but also retains the original excellent performance of the PET fiber membrane.

The present invention relates to the field of unsaturated resin compositions, and discloses an unsaturated resin composition for artificial stone and a preparation method thereof. The unsaturated resin composition includes: an unsaturated resin, a modified additive, maleic anhydride, and a curing agent; the unsaturated resin includes an unsaturated polyester and a polymerizable monomer, the unsaturated polyester is a polymerization product of a polybasic acid and a polyhydric alcohol, and the polymerizable monomer includes a styrene-based monomer; the modified additive is obtained by grafting modified lignin and octadecyltrichlorosilane on the surface of nano-titanium dioxide, and the modified lignin is prepared by grafting reaction of oxidized lignin with p-phenylenediamine and DOPO, and then further grafting with p-phthalaldehyde, γ-aminopropyltriethoxysilane and DOPO. The present invention adds a modified additive and maleic anhydride to the unsaturated resin-based material to improve the appearance yellowing and water resistance and flame retardancy problems of the material, inhibit defects such as performance aging and mechanical property decline, and effectively extend the service life of artificial stone.

A nano silk fibroin fibrous membrane with directional water transport and a preparation method thereof are provided. Firstly, renewable pure silk fibroin is extracted from natural silkworm cocoons. A silk fibroin film with a nanofibrous structure is prepared by an electrostatic spinning method, and a methanol treatment method is used to induce a secondary structure transformation of the silk fibroin film. Then, a spraying process is used to spray octadecyltrichlorosilane (OTS) onto the silk fibroin fibrous membrane, and a uniformly and regularly arranged mesh hydrophobic inner layer and mesh water transport channels are deposited on one side.

The invention discloses a preparation method of CoFe2O4 / polymer magnetic composite microspheres, which comprises the following steps: dissolving octadecyltrichlorosilane in isopropanol at room temperature, dispersing CoFe2O4 powder in the solution, stirring and reacting for a certain time, centrifuging and precipitating, and drying to obtain hydrophobic CoFe2O4 powder; adding the hydrophobic CoFe2O4 powder, potassium persulfate, polyethylene glycol-400 and deionized water into normal octane at room temperature, mixing and stirring, and stirring and emulsifying at a high speed to obtain a water-in-oil Pickering emulsion; and finally, filling the water-in-oil emulsion into a closed container to carry out thermal polymerization reaction, and centrifuging, washing and drying after the reaction to obtain the magnetic composite microspheres. The preparation method disclosed by the invention is convenient to operate, high in balling rate, energy-saving and environment-friendly, and the prepared CoFe2O4 / polymer magnetic composite microspheres have the advantages of strong magnetism, large specific surface area, adjustable microsphere size and the like, and have wide application prospects in the fields of biology, medicine, environment, stealth and the like as magnetic carriers for preparing functional materials.