216 results about "Hydrophobic effect" patented technology

The invention discloses a high-strength PET composite material and a preparation method thereof, and relates to the technical field of polymer materials. The invention first adds fumed silica during the preparation of graphene aerogel, and the siloxy groups on the surface of the fumed silica combine with the hydroxyl groups of the graphene oxide hydrogel, and the aerogel is mixed after heat treatment, which can improve the strength of the composite material and achieve excellent hydrophobic effect; secondly, dopamine is grafted on the surface of the aerogel, and the amino groups of the dopamine and the silanol groups of the silica undergo dehydration condensation to form a composite swelling layered silicate to prepare a hybrid filler; dopamine improves the dispersibility and compatibility of the filler in PET; when fine cracks appear in the composite material due to aging, the swelling layered silicate and the dopamine rainwater work together to achieve a self-repairing effect, and can also remove free radicals, so that the strength of the composite material is stable and the anti-aging performance is improved. The PET composite material prepared by the invention has high strength and anti-aging effects.

The invention relates to a preparation method of a universal super-hydrophobic fluoride-free waterproof agent with strong washability. According to the method, a polymeric monomer and a polymerizable silane coupling agent are subjected to free radical copolymerization or polycondensation to obtain an emulsion A, and a silanol-based compound formed by hydrolysis of the silane coupling agent interacts with the surface of a fiber base material to enhance the adhesive force of microspheres on the fiber surface; meanwhile, organic silicon in the emulsion B is cured on the surfaces of the polymer microspheres and the fibers to form a film, so that the firmness of the fabric is further enhanced, and the washability of the fabric is remarkably improved while an excellent hydrophobic effect is ensured. According to the invention, simplification and batch production of the production process are effectively realized, and meanwhile, the requirements of modern industry on economic and green production are met.

The invention discloses a preparation method for forming a micro-nano hydrophobic coating by dip-coating on the surface of a fabric, and relates to the technical field of hydrophobic modification of natural fiber fabrics. According to the first part of the product, the selected fabric is formed by weaving natural materials through pulping, spinning and other processes, the fabric hydrophobic coating is composed of two parts, the first part is that a hydrophobic solution and the fabric are selected to construct a microcosmic basic structure, the second part is that a hydrophobic layer is secondarily covered with a mixed solvent, and micro-nano solid particles are added; by utilizing the properties of a silane coupling agent and polydimethylsiloxane, the silane coupling agent and the polydimethylsiloxane are mixed according to a proportion, and the mixture is smeared on the surface of the fabric to construct a rough coating. The preparation method has the advantages that the hydrophobicity is good, and a modified product can still have a good hydrophobic effect after being soaked in water for a long time; the environment is protected, when landfill treatment is needed, the product can be degraded in the natural environment for two years, and when combustion treatment is needed, only carbon dioxide, water and other environment-friendly gases can be generated; water and soil loss is prevented, the hydrophobic effect can be kept in the soil for two years, and afforestation and desert greening are facilitated; the soil is fertile, and the product is rich in sodium ions after being soaked in sodium methyl silicate, so that the nutrient of the soil is increased, and the soil is kept in a fertile state.

The invention provides a tropical fruit preservative film which is of a double-layer structure, the outer layer is a moisture-resistant antibacterial layer, and the inner layer is a water-absorbing antifogging antibacterial layer; and the water-absorbing anti-fog antibacterial layer also comprises a pH sensitive microcapsule. The outer layer is prepared from polyhydroxyalkanoate, a humidity sensitive type block copolymer and CuO / SiO2 antibacterial nano-enzyme; and the water-absorbing anti-fog antibacterial layer comprises polyhydroxyalkanoate, a humidity-sensitive block copolymer, hygroscopic zeolite, thymol, gallic acid and a pH-sensitive microcapsule. The preservative film has a certain hydrophobic effect, the humidity of a packaging microenvironment can be adjusted, breeding of putrefying bacteria can be inhibited, meanwhile, thymol and gallic acid form a slow-release antibacterial system, and tropical fruits keep good quality in the storage and transportation links through cooperation of all the components; besides, the pH sensitive microcapsules can respond to acidic substances generated by corruption in real time, help merchants to quickly sort deteriorated fruits, and provide a visual judgment basis for consumers at the same time.

The invention discloses a pH accurate response type water repellent agent for a cement-based material based on isoelectric point characteristics and a preparation method of the water repellent agent. The hydrophobic agent comprises a hydrophobic substance inner core dispersed in a dispersing agent, an amphoteric surfactant layer which is adsorbed on the surface of the inner core and has electric point characteristics, and an inorganic nanoparticle coating layer coating the amphoteric surfactant layer, and the hydrophobic agent is in an emulsion state. The preparation method comprises the following steps: adding the ampholytic surfactant with the electric point characteristic into the dispersing agent, uniformly stirring, then adding the hydrophobic substance, continuing stirring treatment, then adding the inorganic nanoparticles, and stirring and emulsifying to obtain the hydrophobic agent. According to the prepared hydrophobic agent, accurate release of hydrophobic substances in the later stage of cement hydration is achieved, interference of early release on cement hydration is avoided, and the stability and the long-term effect of the hydrophobic effect are remarkably improved.

The invention discloses a pH-responsive deformable dual-targeting nano protein and a preparation method and application thereof, the method comprises the following steps: activating carboxylated mannose through an EDC / NHS system, reacting with an albumin solution, and dialyzing and purifying to obtain mannose modified albumin; and mixing the mannose modified albumin with an inhibitor IRG1-IN-1, and loading the IRG1-IN-1 through a hydrophobic effect to obtain the mannose albumin nanoparticles, ferritin serves as a carrier, oxaliplatin is loaded through a solvent replacement method, and ferritin nanoparticles are obtained; cHO-PEG2k-CHO is used as a coupling agent, and the mannose albumin nanoparticles and the ferritin nanoparticles are crosslinked through a Schiff base reaction, so that the large-size pH-responsive dual-targeting nano-protein is formed. The nano protein has the characteristic of double-targeting separability, so that specific treatment can be realized, immune cell metabolism is interfered while tumor cells are killed, metabolic immunosuppression is blocked, and anti-tumor immunotherapy is promoted.

The invention provides an environment-friendly polypropylene insulated power cable and a preparation process thereof, and belongs to the technical field of cable preparation. The preparation process comprises the following steps: preparing hydrophobic hybrid particles; preparing the hydrophobic anti-icing coating; double modification of hexagonal boron nitride; preparing an insulated cable material; and preparing the power cable. The cable prepared by the invention has good insulating property, the tensile strength can be improved, the service life of the cable can be prolonged, the cable has a remarkable super-hydrophobic effect after being sprayed with the hydrophobic anti-icing coating, the service time of the cable in a low-temperature and high-relative-humidity environment can be prolonged, icing can be avoided, and the use safety of the cable can be ensured.

The invention relates to a composite flocculant for a water treatment process and a preparation method of the composite flocculant, and belongs to the technical field of flocculants. The preparation method of the composite flocculant for the water treatment process comprises the following steps: mixing montmorillonite and a hydrochloric acid solution, performing ultrasonic treatment, filtering, drying, adding absolute ethyl alcohol and a coupling agent, grinding, mixing, filtering, washing, drying, performing high-temperature calcination, cooling to room temperature, adding a chitosan solution, mixing, grinding, and drying to obtain the composite flocculant for the water treatment process. Adding a citral solution, stirring at a constant temperature, filtering, washing, drying, adding modified cinnamyl alcohol, absolute ethyl alcohol and an initiator, uniformly mixing, heating, stirring, filtering, washing and drying to obtain a finished product. By preparing the organic / inorganic composite flocculating agent, the stability of the flocculating agent is improved, and the adsorption capacity of the flocculating agent to pollutants is remarkably improved by compounding a plurality of mechanisms such as hydrophobic effect, electrostatic interaction and metal element coordination.

The invention relates to the field of food preservation, and provides a preservative film as well as a preparation method and application thereof. The preparation method comprises the following steps: loading the fruit and vegetable preservative on a gamma-cyclodextrin-metal organic framework to obtain a composite material; mixing the composite material, a hydrophobic substance and a first solvent to obtain a first solution; mixing a hydrophilic substance with water to obtain a second solution; mixing the first solution and the second solution to obtain a film forming solution, and preparing the preservative film by adopting the film forming solution. According to the invention, the composite material is dispersed into the hydrophobic film base liquid and then mixed with the water-based film base liquid, and the hydrophobic base material can rapidly wrap the composite material into a spherical shape due to hydrophilic and hydrophobic effects, so that a barrier layer is formed to isolate moisture, and the composite material is protected. According to the prepared preservative film, a complete skeleton structure of the gamma-cyclodextrin-metal organic skeleton in the water-based film base solution is kept, and the gamma-cyclodextrin-metal organic skeleton can be uniformly dispersed in the preservative film.

The invention relates to the technical field of hydrophobic materials, in particular to a water-based acrylate emulsion based on structured hydrophobic particle modification as well as a preparation method and application of the water-based acrylate emulsion. The industrial problems that hydrophobic particles are prone to agglomeration and the hydrophobic effect is not lasting are solved. According to the emulsion, long-chain alkyl silane modified silicon dioxide serves as a structured hydrophobic phase, in-situ hybridization is carried out on the structured hydrophobic phase, a hydrophobic silane coupling agent, an acrylate monomer and the like through a semi-continuous emulsion polymerization method, and a stable micro-nano rough structure and a low-surface-energy surface are successfully constructed in a coating. According to the preparation method, a physical hydrophobic structure and chemical hydrophobic components are ingeniously combined, the prepared emulsion is good in stability, the water contact angle after film forming can reach 110 degrees or above, and the emulsion has excellent static hydrophobic and dynamic moisture-resistant performance and has wide application prospects in the fields of buildings, textiles, leather and the like.

The invention discloses a preparation method of a composite filler with heat conduction and hydrophobic effects. Wherein the raw materials required for preparation comprise hexagonal boron nitride powder, hexadecyl trimethyl ammonium bromide, tetraethoxysilane, a silane coupling agent, ammonia water, hydroxyl-terminated polysiloxane, a catalyst and a solvent; during preparation, boron nitride powder is fully dispersed in an ethanol solvent through ultrasonic dispersion, then tetraethoxysilane and a silane coupling agent are added, after ammonia water is added, mesoporous silica grows on the surface of the boron nitride powder in situ through a sol-gel reaction in an alkaline environment, the obtained powder is filtered and dried, and the mesoporous silica / boron nitride composite material is obtained. The preparation method comprises the following steps: preparing mesoporous silica, dispersing the mesoporous silica in a hydroxyl-terminated polysiloxane solution, adsorbing and connecting hydroxyl-terminated polysiloxane to the surface of the mesoporous silica by using an organic tin compound as a catalyst, filtering, washing and drying the modified powder to obtain the composite functional filler with heat-conducting and hydrophobic effects, and adding the composite functional filler into resin to be dispersed so as to be applied to the field of coating protection.

The invention provides a self-roughening type organosilicone super-hydrophobic finishing agent as well as a preparation method and application thereof, and belongs to the technical field of textile finishing. The preparation method comprises the following steps: mixing vinyl silicone oil with a platinum catalyst to obtain a first component; mixing vinyl silicone oil, hydrogen-containing silicone oil and an inhibitor to obtain a second component; mixing the first component and the second component with a reinforcing agent, dissolving in an organic solvent, adding water, and dispersing to obtain the finishing agent. According to the method disclosed by the invention, the finishing agent is formed by oversaturation and precipitation caused by the difference of solubility parameters of an organic silicon polymer in an organic solvent and water; when the finishing agent is used for fabric finishing, the finishing agent can be combined with heating curing treatment to promote rapid crosslinking of organic silicon liquid drops before complete diffusion on the surface of a fabric, so that construction of a self-rough surface is realized. The finishing agent can endow a fabric with an excellent hydrophobic effect, has good wear resistance, washing resistance and chemical stability, and has small influence on air permeability.

The invention relates to the technical field of coatings, and discloses a wear-resistant super-hydrophobic coating and a preparation method thereof. The wear-resistant super-hydrophobic coating prepared by the invention is prepared by taking the waterborne polyurethane emulsion as a main raw material, adding the hydrophobic modified organic silicon, the wear-resistant agent, the defoaming agent and other auxiliaries and stirring, and the coating not only has excellent adhesive force and wear resistance, but also has a super-hydrophobic effect; wherein the introduction of the hydrophobic modified organic silicon improves the bonding strength and wear resistance of the coating to a base material, and the introduction of the low-surface-energy fluorine element and the-Si-O-Si chain segment improves the hydrophobicity of the coating and endows the coating with super-hydrophobicity.

The invention discloses an acidification blocking remover for an oil field and a preparation method of the acidification blocking remover. The acidification blocking remover comprises the following raw materials in parts by weight: 40-60 parts of hydrochloric acid, 10-20 parts of hydrofluoric acid, 5-10 parts of fluoboric acid, 1-3 parts of a modified stabilizer, 0.1-0.5 part of imidazoline and 20-30 parts of water. The modified stabilizer contains a quaternary ammonium salt structure which can be combined with negative charges on the clay to form a modified stabilizer coating on the surface of the clay, a polysiloxane molecular chain on the modified stabilizer can form a layer of hydrophobic film on the surface, and due to incompatibility between water molecules and hydrophobic groups, the hydrophobic film repels water groups, so that the clay can be degraded. Alkyl long chains on the outer side are combined with a hydrophobic membrane formed by polysiloxane molecules to form a second layer of hydrophobic membrane, then a bimolecular membrane is formed on the surface of the clay, the hydrophobic effect of the bimolecular membrane is far higher than that of a traditional monomolecular membrane, external moisture is effectively prevented from entering clay particles, and hydration expansion of the clay is inhibited.

The invention relates to the technical field of concrete admixtures, and particularly discloses a waterproof dense setting accelerator and a preparation method and application thereof, the waterproof dense setting accelerator comprises the following components by weight: 5-10 parts of a suspending agent, 50-250 parts of modified silica sol, 100-250 parts of an organic complex waterproof agent, 400-600 parts of a setting accelerator, and water; wherein the modified silica sol is obtained by modifying acidic silica sol with a modifier, and the modifier is a silane coupling agent; wherein the organic complexing waterproofing agent is a higher fatty acid aluminum complex. After the waterproof dense setting accelerator is doped into concrete, a large amount of air entraining of the concrete cannot be caused, microcracks of sprayed concrete can be filled, the compactness of the concrete is further improved, meanwhile, a hydrophobic effect is formed in the sprayed concrete and on the surface of the sprayed concrete, and the addition of the organic complexing waterproof agent can promote the condensation of the concrete, so that the waterproof performance of the concrete is improved. And the concrete can be quickly coagulated by matching with a coagulant.

The invention relates to the technical field of pharmaceutical preparations, in particular to a pure drug-based nano preparation constructed by super-solubilization of a natural polyphenol material and a biguanide drug and a preparation method of the pure drug-based nano preparation. The pure drug-based nano preparation constructed by super solubilization of the natural polyphenol material and the biguanide drug provided by the invention is composed of the natural polyphenol material and the biguanide drug, and a phenolic hydroxyl group of the natural polyphenol material and an amino group of the biguanide drug are self-assembled into the nano preparation through electrostatic interaction and hydrophilic and hydrophobic effects, namely the pure drug-based nano preparation. The mass ratio of the natural polyphenol material to the biguanide drug is 1: (0.0001-10000). The pure drug-based nano preparation provided by the invention has the advantages of high drug loading capacity, simple preparation process, greenness, high efficiency, safety and suitability for industrial application.

The invention discloses a preparation method of a magnetic melamine hydrophobic oleophylic sponge, which comprises the following steps: extracting urushiol in raw lacquer by using acetone or ethanol as a solvent, and soaking a melamine sponge in a methanol solution of the urushiol to obtain a modified melamine sponge; the preparation method comprises the following steps: ultrasonically soaking the modified melamine sponge in a nano Fe3O4 dispersion liquid, and soaking the modified melamine sponge in a methanol solution of urushiol to obtain the magnetic melamine hydrophobic oleophylic sponge. After urushiol is extracted by taking a natural product raw lacquer as a raw material, the melamine sponge is modified, the surface energy of the sponge is reduced, and the hydrophobic effect of the sponge is enhanced, so that the selective adsorption capacity of the sponge to oil substances is enhanced, meanwhile, the mechanical property of the melamine sponge is improved, and the strength and toughness of the melamine sponge are improved; the modified sponge is not easy to damage in the adsorption process, and the service life is prolonged. The preparation method disclosed by the invention is simple to operate and low in cost, and the prepared magnetic hydrophobic oleophylic sponge has a remarkable application effect in the field of oil-water separation.

The invention discloses a super-hydrophobic self-cleaning dirt-repellent flannel fabric and a preparation method thereof, and relates to the technical field of flannel fabrics, and the preparation method comprises the following steps: preparing nano self-expanding fibers, first hydrophobic fibers and second hydrophobic fibers, taking the nano self-expanding fibers to coat the first hydrophobic fibers and the second hydrophobic fibers to obtain composite yarns, and preparing the super-hydrophobic self-cleaning dirt-repellent flannel fabric. Preparing nano self-expanding yarns, performing cross weaving on the yarns to obtain base cloth, and forming a fluff layer on the top of the base cloth. According to the flannel fabric, by arranging the yarn fibers with two super-hydrophobic degrees, the super-hydrophobic degree of the flannel fabric can be adjusted, when stains adhere to the surface of the flannel fabric, the second hydrophobic fibers leak out, the super-hydrophobicity of the flannel fabric at the stains is lower than the super-hydrophobicity of other positions, and when the surface of the fabric is flushed by water drops, the flannel fabric has the super-hydrophobic effect. The water drops tend to the position in the rolling process, so that more water drops easily pass through the stain position, the stain position can be effectively cleaned conveniently, and the self-cleaning capability of the fabric is realized.

The invention relates to the field of composite material processing, and discloses a silica aerogel master batch as well as a preparation method and application thereof. The preparation method comprises the following steps: in the presence of water, contacting polyvinyl alcohol with hydrophobic silicon dioxide aerogel, and stirring at a high speed to obtain a mixture; the viscosity of the mixture at the temperature of 20 DEG C ranges from 50000 mPa.s to 100000 mPa.s; the weight-average molecular weight of the polyvinyl alcohol is 20000 to 200000 g / mol; the alcoholysis degree is greater than 78%; and mixing the obtained mixture with glass beads. The preparation method provided by the invention has the advantages that the preparation efficiency is high, the preparation process is pollution-free, the silicon dioxide aerogel structure is not damaged, the obtained silica aerogel master batch has better lightweight effect, hydrophobic effect, heat insulation effect and compounding effect, and the silica aerogel master batch can be randomly formed before being dried, so that the service life of the silica aerogel master batch is prolonged. And plasticity reduction can be realized through contact heating with hot water of which the temperature is greater than or equal to 90 DEG C.

The invention relates to a preparation method of a molecularly imprinted composite filler, and relates to the technical field of analytical chemistry and environmental monitoring technologies, the preparation method of the molecularly imprinted composite filler comprises the following steps: firstly dissolving template molecules and a first monomer, then adding a cross-linking agent and an initiator, carrying out deoxidation and water bath, and then centrifuging to obtain a template molecule solution; and eluting the precipitate with a flushing fluid, and drying to obtain the microspheres. And dissolving the ionic liquid, uniformly stirring with the obtained microspheres, and carrying out centrifugal separation, washing and vacuum drying to finally prepare the molecularly imprinted composite filler. Finally, the hydrophobic property of the molecularly imprinted composite filler is improved through modification of the ionic liquid and the second monomer. The method provided by the invention has excellent hydrophobic effect and enrichment capability on a target object.

This invention discloses a composite sludge dewatering agent and its preparation method. The dewatering agent is prepared by polymerizing modified monomers, a modified carrier, acrylamide, acryloyloxyethyltrimethylammonium chloride, and sodium methpropylene sulfonate to form polyacrylamide on the surface of the modified carrier. The surface of this dewatering agent contains both positive and negative charges. The positive charge can bind with negatively charged organic suspended matter, while the negative charge can accelerate the settling of inorganic suspended matter. The polyacrylamide on the surface contains organosilicon segments, which enhance the hydrophobic effect of the dewatering agent, achieving a water-repellent effect while adsorbing suspended matter. Furthermore, the surface contains an iron-based metal-organic framework, which, combined with the positive charge on the surface, can disrupt the stable structure of the extracellular polymeric material of the sludge, thereby dispersing organic matter and releasing internal moisture. Simultaneously, the organic matter can be encapsulated by the cyclodextrin cavities on the surface and the porous cavities inside, further improving the sludge dewatering effect.

The invention discloses a preparation method and application of a super-hydrophobic antifouling coating with a self-repairing function, and belongs to the technical field of modification of self-repairing super-hydrophobic coatings of textiles. The method comprises the following steps: mixing boric acid, ethanol and n-octadecyltriethoxysilane, heating and stirring to completely dissolve the boric acid to obtain a mixed solution; and dropwise adding water into the mixed solution while heating and stirring, and then standing and reacting to form a B-O-Si covalent bond, thereby obtaining the super-hydrophobic antifouling coating material. After the fabric is subjected to immersion treatment by the super-hydrophobic antifouling coating material, a good dynamic hydrophobic effect is shown, the original air permeability and moisture permeability of the fabric are hardly influenced, and compared with the original fabric, the air permeability is reduced by 1.9-6.6%, and the moisture permeability is reduced by 3.2-4.8%; after the super-hydrophobic antifouling coating fabric is worn and damaged by washing, the super-hydrophobic performance can be recovered under the condition of standing for 180 minutes or heating at 110 DEG C for 30 minutes.

The invention discloses a rolling method for an antibacterial titanium alloy plate, relating to the technical field of titanium alloy materials. An antibacterial agent, modified chitosan and guar gum are mixed, glycerol is used as a plasticizer, and ammonium tripolyphosphate is used as a cross-linking agent to prepare an antibacterial coating, which is then coated on the surface of the titanium alloy. The alkylated chitosan has a long hydrophobic chain and is tightly cross-linked with the guar gum under the cross-linking action of sodium tripolyphosphate, thereby synergistically improving the hydrophobic effect of the coating and blocking the adhesion of moisture and bacteria. Silver nanoparticles are evenly dispersed on the surface of montmorillonite. Through the effective combination of the two antibacterial effects, the antibacterial effect of the coating is fully exerted, while also protecting the titanium alloy plate and improving its corrosion resistance.

The present invention discloses a photo-generated chiral radical molecule based on a triarylamine derivative with circularly polarized luminescence properties, and its preparation and application. It is prepared by subjecting tris(4-aminophenyl)amine to an amide condensation reaction with an aryl-containing chiral isocyanate or an aryl-containing chiral carboxylic acid. The triarylamine derivative molecule of the present invention has the characteristics of being easy to generate and detect chiral radicals. In addition to being detected by ultraviolet-visible absorption spectroscopy and CD spectroscopy, the generation of radicals can also be judged by color change. The planarization of the conformation of the triarylamine molecule itself after the generation of radicals makes it easy to undergo self-aggregation, thereby amplifying the chiral signal. The positive charge carried can also interact with other negatively charged molecules through charge interaction to generate chiral transfer or induce self-assembly. The amide bond and urea bond components contained in the molecule enable the regulation of hydrogen bond interaction and hydrophilic-hydrophobic effect by solvents to change the circularly polarized luminescence intensity and direction brought by its aromatic group part.

The invention provides hydrophobic leakproof spacer fluid for well cementation as well as a preparation method and application of the hydrophobic leakproof spacer fluid. The hydrophobic leakproof spacer fluid for well cementation comprises water, a weighting agent, walnut shells, fibers, a retarder, a hydrophobic macromonomer, a cross-linking agent and the like. A hydrophilic sulfonic acid group in the hydrophobic macromonomer has a complexing effect on calcium ions in mudstone, and an ester group as a hydrophobic group has a hydrophobic effect, so that a fixed arrangement that the hydrophilic sulfonic acid group faces the calcium ions and the hydrophobic group faces outwards is formed in a spacer fluid system. Wherein the hydrophobic groups are arranged to form a barrier layer for water, so that the invasion of water can be prevented, the effect of preventing water erosion is achieved, and the sedimentation of molecules such as a weighting agent can also be prevented. Tests show that the hydrophobic leakproof spacer fluid for well cementation has the pressure bearing capacity of 3.5-8 MPa when being tested by a hole type leakage stoppage instrument for seams of 1-3 mm, the pressure bearing capacity of a stratum is correspondingly improved by 3.5 MPa, and leakage in the well cementation process can be effectively avoided or reduced.

The invention relates to a pump chamber structure and a pump, and relates to the technical field of water pumps, the pump chamber structure comprises a pump cavity and an impeller, the pump cavity and / or the impeller are / is provided with a drainage structure, the drainage structure comprises a plurality of grooves, and the width and the depth of each groove are both 2 microns. After being used for a long time, the hydrophobic coating still has the advantage of good hydrophobic effect.

The invention discloses a sealing material for doors and windows, and relates to the technical field of sealing materials, the sealing material is composed of a biomass polyester elastomer, three-stage core-shell state nanometer SiO2, vulcanized rubber, a plasticizer, a dispersant and a functional auxiliary agent; wherein the three-stage shell-core state nano SiO2 comprises a mesoporous nano SiO2 core, perfluoropolyether silane, an interwoven network layer formed by C = N bonds and C18-QAS, the interwoven network layer and the C18-QAS are sequentially coated outside the mesoporous nano SiO2 core, and a fluorine chain layer formed by the perfluoropolyether silane not only has a hydrophobic effect, but also can form space matching with the interwoven network layer formed by the C = N bonds, so that stress concentration is avoided; meanwhile, the C = N bond is reversibly fractured or recombined under stress, so that energy between the nano-particles and the cross section of the matrix is dissipated, and the fracture performance is improved; the quaternary ammonium salt cations of C18-QAS and carboxyl contained in the middle shell generate electrostatic attraction, so that the polymerization direction of the outer shell is perpendicular to the surface of the inner core, a nanoscale groove structure is formed, and cross-interface permeation of water molecules is efficiently inhibited.

The present invention discloses an antioxidant polypeptide nanoparticle, a preparation method and an application thereof, belonging to the field of nano-medicine technology. The present invention provides an antioxidant polypeptide nanoparticle, which uses the MMP12 polypeptide with antioxidant effect as a raw material. The N-terminal and C-terminal of the antioxidant polypeptide are respectively modified with maleimide groups and thiol groups. Through the hydrophilic effect of the carboxyl group that can be used for modification in the aspartic acid side chain contained in the polypeptide, the hydrophobic effect of the benzene rings on the tryptophan and tyrosine side chains, and the π-π stacking between tryptophan and tyrosine between polypeptides, spherical nanoparticles are formed. In addition, natural polypeptide molecules have problems of poor stability, easy enzymatic hydrolysis or oxidation inactivation. The antioxidant polypeptide nanoparticle prepared by the present invention can improve the stability of the polypeptide, and at the same time has advantages such as good biocompatibility, antioxidant property and modifiability, and has broad application prospects in the fields of skin care, drug delivery and the like.

The invention discloses an attapulgite-multi-walled carbon nanotube purification material as well as a preparation method and application thereof. The attapulgite-multi-walled carbon nanotube is used as a purifying agent in tea pesticide detection, matrix interferents can be effectively removed, the surface area of the attapulgite-multi-walled carbon nanotube is large, and pigments can be adsorbed from a complex matrix through the electron interaction and hydrophobic interaction of the multi-walled carbon nanotube; the porous structure of the attapulgite can physically adsorb and capture macromolecular impurities (such as proteins and polysaccharides), and amido bonds on the interface of the attapulgite-multi-walled carbon nanotubes can also adsorb polar molecules (such as organic acids). The attapulgite-multi-walled carbon nanotube interface is connected through a chemical bond, so that the phase separation problem of a physical mixed adsorbent is avoided, the material is uniformly dispersed in a solvent and can be in rapid contact with a matrix, and the purification efficiency is improved. Compared with a traditional QuEChERS method, the method has the advantages that a single material attapulgite-multiwalled carbon nanotube is adopted as a purifying agent, matrix impurities can be efficiently removed without multi-material combination, and the method is small in dosage, high in adsorption capacity, simple in experimental operation and low in raw material cost.

The invention provides high-activity crataegus pinnatifida fruit vinegar and a preparation method thereof.The preparation method comprises the steps that crataegus pinnatifida fruits are juiced, then a composite chelating agent composed of polyglucuronic acid and monopotassium phosphate is added for chelating treatment, and a polysaccharide-metal ion cross-linked network is removed; then adding endo-beta-1, 4-glucanase to carry out linear polysaccharide directional enzymolysis, so that the viscosity of the fruit juice is obviously reduced; after the components are adjusted, double modified yeast beta-glucan microspheres are added, yeast is inoculated for alcoholic fermentation, the microspheres are subjected to double grafting modification through galactooligosaccharide and theaflavin, and active components in the crabapple can be directionally captured and stabilized through hydrophilic and hydrophobic effects respectively; after alcohol fermentation is finished, acetic bacteria are inoculated for acetic fermentation, and finally, filtering and sterilization are performed. According to the method disclosed by the invention, by virtue of a synergistic strategy of breaking a network firstly, then carrying out enzymolysis debonding and then carrying out microsphere loading, the fermentation mass transfer efficiency is effectively improved, and meanwhile, the retention rate of functional components such as polyphenol and saponin in the fruit vinegar is increased.