40results about How to "Improve hydrophobicity and lipophilicity" patented technology

The invention relates to a preparation method of a collagen-based porous oil-absorbing material, and relates to the technical field of biomass resource recycling and environment-friendly oil-absorbing materials. A collagen-based porous oil-absorbing material preparation method provided by the invention comprises the steps that: (1) lime-expanded pelt scraps before tanning are cut into small pieces; pretreatments such as deliming, degreasing and dehydration are carried out, such that hide powder fiber is obtained; (2) the prepared hide powder fiber is dispersed in a buffering solution containing an epoxysilane coupling agent or polydimethylsiloxane for modification, such that hydrophobic lipophilic hide powder fiber is obtained; and (3) the modified hide powder fiber obtained in the step (2) is dispersed in water; and forming and drying ae carried out, such that the collagen-based porous oil-absorbing material is obtained. The method provided by the invention has the advantages of simple operation and low cost. The prepared oil-absorbing material has hydrophobic lipophilic properties and a porous structure. The material also has biodegradability and relatively high oil-absorbing capacity. Therefore, a novel application approach is developed for the high-value conversion and utilization of hide collagen fiber solid wastes.

The invention discloses a washable photo-catalytic super-hydrophobic cotton fabric, wherein a dopamine modified cotton fabric, the surface of which is loaded with beta-FeOOH nano-particles, is used asa carrier; and the surface of the carrier is modified with dodecanethiol. The invention discloses a preparation method of the washable photo-catalytic super-hydrophobic cotton fabric. Dopamine modification processing on the purified cotton fabric is carried out; by taking ferric salt as a precursor, the beta-FeOOH nano-particles grow on the surface of the dopamine fabric in situ; then, a low-surface-energy matter, namely dodecanethiol, is modified on the surface of the rough fabric; and thus, the super-hydrophobic cotton fabric having water resistance and photo-catalytic performance is obtained. The fabric in the invention can completely degrade methylene blue solution within 180 min in visible light; furthermore, the water resistance is good; after circulation for five times, both the stability and the reliability of degrading the methylene blue solution can reach 90%; furthermore, the surface droplet static contact angle of the cotton fabric is greater than 150 DEG C; and, after oilwater separation through different oil, the separation rate is greater than 98%.

The invention discloses a preparation method of nanoscale organobentonite, which comprises the following six steps: (1) bentonite raw ore processing, (2) sodium modification, (3) centrifugation purification, (4) inorganic acid modification, (5) organic coating reaction, and (6) a post treatment stage. The preparation method has the characteristics that through substep purification, a mass ratio of a sodium agent to suspending liquid is kept at 0.3%; in an inorganic acid modification process, improvements are performed by adjustment of a PH value to subacid and a charging mode in the organic coating reaction stage; the bentonite is subjected to delaminating dispersion, centrifugation purification and superfine grading to prepare pure montmorillonite with the content greater than 95%; then, double octadecyl dimethyl ammonium chloride is used for performing the organic coating reaction; finally crushing to a nanoscale particle size is performed, that is, the average lamellar thickness is less than 25 nanometers; and the preparation method ensures the product quality, shortens the production cycle greatly, lowers the production cost, and is suitable for large-scale popularization and application.

The invention discloses a polyurethane sponge loaded with a hybridized graphene coating and a preparation method of the polyurethane sponge. The sponge is formed by loading the micrometer zinc oxide hybridized graphene coating on a polyurethane sponge, and the thickness of the coating is 0.3-0.8mm; the mass ratio of zinc oxide to graphene is 5 percent. According to the test of the hydrophobic effect and the oil absorption ability of the loaded sponge, an experiment shows that the hydrophilia of the sponge turns into high hydrophobicity (a contact angle is 147.9 degrees), the oil adsorption ability of the sponge is obviously increased, and the saturated adsorption quantity of the sponge on diesel reaches 28.01g. Graphene which is modified with hybridized micrometer zinc oxide and graphene oxide is loaded on the sponge, so that the hydrophobic and lipophilic property of the polyurethane sponge is improved; therefore, the effective preparation method for oil polluted water body remediation is provided.

The invention relates to organic bentonite for white oil-based drilling fluid of the petroleum industry, the natural gas industry and the like, and a preparation method of the organic bentonite. The hydrophobicity, the lipophilicity and the high-temperature resistance of the organic bentonite are improved, and the organic bentonite is good in compatibility, high in system viscosity and moderate in dynamic shearing force. According to the technical scheme, the organic bentonite comprises the following raw materials in percentage by mass: 60-80 parts of sodium bentonite as the bentonite, 10-30 parts of m-alkyl trimethyl ammonium halide as quaternary ammonium salt, 2-10 parts of sodium lauryl sulfate, sodium dodecyl sulfate or sodium dodecyl benzene sulfonate as an anionic surfactant. The preparation method comprises the following steps: screening the bentonite, adding water to prepare bentonite suspension, adding a quaternary ammonium salt solution into the bentonite suspension for once modification, further adding an anionic surfactant solution into the suspension for secondary modification, and finally aging, drying, crushing and screening so as to prepare the organic bentonite. The product is simple in production process and convenient to operate, and is used as drilling fluid as the hydrophobicity, the lipophilicity and the high-temperature resistance are all improved.

The invention discloses a preparation method for a hydrophobic lipophilic polyurethane sponge, belonging to the technical field of sponge preparation. According to the preparation method, polyurethaneresin is blended with amber powder and a copolymer to prepare a self-made polyurethane sponge; then under the action of a foaming agent and a curing agent, a three-dimensional porous structure is formed and has low density and high porosity; the organification of the surface of molybdenum disulfide powder is enhanced, and a part of stearic acid having not participated in a reaction is to be condensed since the melting point of stearic acid is about 70 DEG C, which is beneficial for improvement of the hydrophobicity and lipophilicity of the polyurethane sponge; and self-made titanium dioxide sol is further modified by using a silane coupling agent KH-570, and since KH-570 is a silane coupling agent with a long hydrophobic chain, a part of covalent bonds generated after a dehydration reaction of the silane coupling agent with hydroxyl groups on the surface of a titanium dioxide sol promotes successful loading of titanium dioxide particles in the modified sol onto the surface of the polyurethane sponge, so a layer of hydrophobic lipophilic protection film is formed, and the hydrophobic lipophilic polyurethane sponge has good application prospects.

The invention relates to white carbon black with dyeing groups on the surface and a preparation method of the white carbon black. In a formula I, R represents reactive groups of a silane coupling agent, and Dye represents the dyeing groups. The dye modified white carbon black prepared with the method has wide raw material sources and is lower in cost, part of monomers is the industrialized raw material, and a reaction method is mature. Compared with non-modified white carbon black, the dye modified white carbon black prepared with the method has high hydrophobic and lipophilic properties, and can improve combining property with reinforced rubber and improve reinforcement effect; meanwhile, the white carbon black has different colors and can endow the reinforced rubber with different colors, and besides, transference resistance of the dye is better; an obtained copolymer has broad application prospect in the aspect of improvement of flame retardancy and bonding flame retardancy of polyolefin.

The invention discloses a super-hydrophobic oleophylic material which comprises a matrix, a reinforcing body, a coupling agent and a nano coating attached to the surface of the matrix, the matrix material is one of a stainless steel mesh, foamed nickel, foamed copper or foamed titanium, the coupling agent is dopamine, and the nano coating on the surface is one or two of hexadecylamine and octadecylamine; and the reinforcing body is graphene. The invention also discloses a preparation method thereof. According to the design thought, a layer of reduced graphene oxide coats a metal wire mesh framework such as foamed nickel and the like, the graphene serving as the reinforcing body plays a role in improving the strength of the matrix material, graphene oxide with a small particle size is adopted for coating of the graphene, and after reduction, the sheet layer of the graphene is thin, so that the excellent performance of the graphene can be played. In addition, the graphene has hydrophobicity, the surface of the graphene is modified with nanoscale low-surface-energy substances, performance integration of the graphene and the low-surface-energy substances is achieved, and hydrophobicity, lipophilicity and use durability are improved.

The invention relates to a preparation method of a modified shaddock peel fiber oil absorption material, and belongs to the technical field of adsorption materials. According to the method, shaddock peels serve as an oil absorption main body, condensation water in fiber cells are rapidly evaporated and expanded by the aid of high-temperature and high-pressure vapor, lignin coating effects and cellulose crystalline structures are broken, the porosity of the material is remarkably increased, fibers are treated by plasmas, more active sites on the surfaces of the fibers are activated, ester exchange modification is further performed, hydroxyl of small-molecular weight on cellulose is replaced by acetyl of large size, hydrogen bond acting force between molecules and hydrogen bond acting forcein the molecule are weakened, steric hindrance is increased, structures of crystalline areas are broken to some extent, condensed state structures of hemi-cellulose and lignin firmly coating crystalline cellulose are expanded, so that the porosity of the material after ester exchange modification is increased, hydrophobic oil affinity of the cellulose is improved, space structures of cellulose materials are enhanced, and oil absorption performance is enhanced.

The invention discloses a preparation method of a bamboo-based polycaprolactone composite sheet material modified by nano-silica and nano-titanium dioxide. The preparation method comprises the following steps: polycaprolactone is mixed with modified bamboo powders, hydrophobically modified bamboo fibers, modified nano-silica and a silica immobilized antioxidant in a double-roll plasticator, and the mixture is subjected to compression molding on a hot press with a set hot pressing temperature and a set hot pressing pressure; and the surface of the bamboo material is subjected to pulling film forming using titanium dioxide sol by a dipping-pulling method, and then an anti-bacterial and mildew-resistant modified bamboo material is obtained after a heat treatment of the pulled bamboo material.Silica is modified in toluene solvent using a silane coupling agent KH570 to enhance hydrophobicity and lipophilicity, and dispersibility of the modified silica in the bamboo material is excellent, so that impact-resistance and aging-resistance of the bamboo material are substantially improved. The surface of the bamboo material is subjected to pulling film forming using titanium dioxide sol by adipping-pulling method, so that nano-titanium dioxide modification of the bamboo material is achieved, and after the high temperature treatment, the titanium dioxide modified bamboo material is strong in anti-bacterial and mildew-resistant properties and low in cost.

The invention discloses organosilicon compound modified hydrophobic polyurethane foam and a preparation method thereof, and belongs to the field of preparation and application of oil-water separation materials. The preparation method comprises the steps of firstly, reacting an isocyanate group with a hydroxyl group to generate a carbamate group, introducing an organosilicon chain segment into a polyurethane main chain, and then reacting with water to prepare polyurethane foam; and after chromic acid etching, grafting long-carbon-chain silane on the surface of the polyurethane foam, hydrolyzing the long-carbon-chain silane to generate silicon hydroxyl, and enabling the silicon hydroxyl and hydroxyl on the surface of the polyurethane foam to be subjected to dehydration condensation so as to obtain the organic silicon modified hydrophobic polyurethane foam. The silicon compound is reasonably introduced into a polyurethane system, so that the oil-water selectivity of the polyurethane foam is improved, and the hydrophobicity and lipophilicity of the polyurethane foam are improved. The test results of morphology characterization and water contact angle also prove that the hydrophobic polyurethane foam prepared by the invention can significantly improve the problem of poor oil-water selectivity of polyurethane foam in the oil-water separation process.

The invention discloses a preparation method of cuprous oxide/melamine sponge for recycling oil spill; high-hydrophobic high-oleophilic sponge is prepared by compositing cuprous oxide and melamine, wherein Dow Corning silica gel is used as a binder to more tightly bind cuprous oxide and melamine, Dow Corning silica gel is also used as a modifier, and hydrophobicity of the melamine sponge can be further improved. The sponge is prepared mainly by compositing melamine sponge as a carrier to cuprous oxide, the hydrophobicity and oleophilicity of the sponge are judged through contact angle test and oil-water adsorption test, and the composition condition of the cuprous oxide on the surface of the modified melamine sponge is characterized through an SEM (scanning electron microscope). The preparation process is simple, the cost is low, the prepared material has good hydrophobicity and oleophilicity, it is easy to desorb and recycle oil, reuse is available, and the sponge may be effectively applied to the controlled recycling for oil spill incidents.

The invention discloses an aminated modified lignin-based polyurethane foam, and a preparation method and application thereof. The preparation method comprises the following steps: firstly, adding formaldehyde and an amination reagent into a lignin solution for amination treatment, then adjusting the pH value of the solution to 2-3, standing, precipitating and drying to obtain aminated lignin; and then, uniformly mixing the aminated lignin with polyether polyol, a surfactant, a catalyst and a foaming agent, and adding isocyanate for reaction to form the aminated modified lignin-based polyurethane foam, wherein the temperature of the amination reaction is 70-100 DEG C, and the reaction time is 2-6 hours; and the addition amount of the amination reagent is 15-25% of the mass of the lignin. The prepared aminated modified lignin-based polyurethane foam can be used for adsorbing and separating oil substances with relatively high viscosity (the viscosity is 95 mm<2>/s at the temperature of 40 DEG C), the maximum adsorption capacity is as high as 7.70 g/g, and high adsorption of the oil substances is realized.

The invention discloses a hydrophobic modification method of sodium alginate sponge as well as a product and application thereof. The method comprises the steps: soaking the sodium alginate sponge into calcium ion solution, and then soaking in zirconium ion solution to obtain modified sodium alginate sponge. Relative to a method for hydrophobic modification of materials such as graphene, polysiloxane, organo-siloxane and a metal organic skeleton (these modification agents are high in price, toxic, and complicated in synthesis process, and are not beneficial to large-scale production and application) on the sodium alginate sponge, the porous sodium alginate sponge prepared according to the invention is simple in method, green and environmental-friendly and easy to produce in large scale. Next, sodium alginate is rich in natural resource, can replace petroleum-based sponge, and solves the problem that the current petroleum resource is scanty. Subsequently, hydrophobic three-dimensional porous sodium alginate sponge has a good adsorption effect on various oils or organic solvents, and is easy to desorb and can be repeatedly used.

The invention discloses modified silicon carbide nanowire-rare earth salt conversion liquid for magnesium alloy surface treatment. The conversion liquid uses rare earth salt as a main film forming agent, and uses sodium molybdate, tartaric acid, sodium fluoride and the like as assistants; on the basis, a stearic acid surface modified silicon carbide nanowire is added; and the modified nanowire is easier to disperse in a solution, so that the uniform and stable reinforcement effect is obtained, the corrosion resistance and the wear resistance of a rare earth salt conversion film can be prominently improved, meanwhile, the surface hydrophobic lipophilicity of the film layer can be improved, the magnesium alloy surface cleanness is further improved, and the compatibility with an organic coating layer is better.

The invention discloses a preparation method and application of modified nano calcium carbonate through MMA in-situ polymerization. The preparation method comprises steps: firstly, subjecting nano calcium carbonate slurry to uniform polymerization reaction in an MMA monomer solution by adopting a two-phase mixed solution method, secondly, filling slurry CaCO3@PMMA modified by utilizing MMA into a PVDF matrix, and then preparing a CaCO3@PMMA/PVDF composite material by adopting a water vapor induced phase separation method (WVIPs); and carrying out hot pressing to obtain the block-shaped CaCO3@PMMA/PVDF composite material. The hydrophobic and oleophylic properties of the nano calcium carbonate are effectively improved through in-situ polymerization modification, and after hot pressing, the modified calcium carbonate can be dissolved in the matrix PVDF while keeping the original distribution state and is tightly combined with the matrix, so that the durability of the CaCO3@PMMA/PVDF composite material is improved. The preparation method comprises the following steps: preparing CaCO3@PMMA by using an MMA in-situ polymerization modification and two-phase solution mixing method, then uniformly distributing the modified powdery CaCO3@PMMA composite material in a PVDF matrix by using a water vapor induced phase separation method, and finally preparing the blocky CaCO3@PMMA/PVDF composite material by using a hot pressing method.

The invention provides a polyvinylidene fluoride filter membrane as well as a preparation method and application thereof. The preparation method of the polyvinylidene fluoride filtering membrane comprises the following steps that acetone and a preset solvent capable of dissolving polyvinylidene fluoride are mixed, a mixed solvent is obtained, and the mass fraction of acetone in the mixed solvent is 3%-90%; polyvinylidene fluoride is dissolved in a mixed solvent, a polyvinylidene fluoride solution is obtained, and the mass concentration of the polyvinylidene fluoride solution is 3%-40%; and spinning the polyvinylidene fluoride solution by adopting a solution jet spinning process to obtain the polyvinylidene fluoride filter membrane. After the polyvinylidene fluoride is dissolved by adopting the mixed solvent formed by mixing the acetone and the preset solvent capable of dissolving the polyvinylidene fluoride, the polyvinylidene fluoride solution is spun by adopting a solution jet spinning process to form the polyvinylidene fluoride filter membrane, and the surface appearance of the polyvinylidene fluoride filter membrane can be changed by adding the volatile acetone, so that the surface appearance of the polyvinylidene fluoride filter membrane can be changed. The water contact angle of the polyvinylidene fluoride filtering membrane is increased, the hydrophobic lipophilicity of the polyvinylidene fluoride filtering membrane is enhanced, and the oil filtering effect is enhanced.