12results about How to "Improve water repellency" patented technology

The invention discloses a porous lithium metatitanate type lithium ion sieve and a preparation method thereof, and belongs to the technical field of new materials. The preparation method comprises the following steps: synthesizing lithium metatitanate powder by taking titanium dioxide and lithium carbonate as raw materials through a solid-phase method; carrying out surface hydrophobic modification treatment on the lithium metatitanate powder by adopting a silane coupling agent to obtain modified lithium metatitanate powder; the preparation method comprises the following steps: by taking a water solution containing gelatin and a dispersing agent as a water phase and a mixed solution containing a styrene monomer, a divinylbenzene cross-linking agent, an initiator and a pore-forming agent as an oil phase, carrying out suspension polymerization to obtain composite particles; the composite particles are firstly eluted to remove the pore-forming agent, and then are subjected to acidification transformation, so that the lithium ion sieve with high mechanical strength, uniform particle size distribution, stable structure, good recycling effect and stable adsorption capacity is obtained, the use capability of the lithium ion sieve in the industrial application process is effectively improved, and the service life of the lithium ion sieve is prolonged. The technical problems that a powdery lithium ion sieve is high in solution loss, difficult to filter and the like are solved.

The invention relates to the technical field of dredged soil curing agents, in particular to a dredged soil pneumatic mixed flow curing agent and a preparation method thereof. The dredged soil pneumatic mixed flow curing agent is prepared from the following raw materials in parts by weight: 20 to 50 parts of cement, 10 to 40 parts of fly ash, 10 to 40 parts of mineral powder, 20 to 50 parts of quick lime, 0.01 to 0.1 part of retarder, 0.01 to 0.05 part of flocculant, 0.005 to 0.01 part of silane coupling agent and 0.1 to 0.3 part of hydrophobic adsorption type admixture. The hydrophobic adsorption type admixture, the silane coupling agent and the flocculating agent are doped into the curing agent raw materials at the same time and have a synergistic enhancement effect, so that the cohesiveness and the pumpability of curing agent slurry can be remarkably improved, the adaptability of the curing agent slurry and dredged soil in a pneumatic mixed flow process can be enhanced, the sensitivity to the water content of the dredged soil is reduced, and the curing agent has the advantages of being simple in preparation process and low in cost. The solidified soil is relatively stable in later-stage reinforcement, the solidifying agent is used in dredged soil pneumatic mixed-flow solidification production, the pumping constructability, the dispersion resistance in water and the hardening performance of the solidified soil can be remarkably improved, and the solidifying agent is suitable for filling projects such as sea reclamation and backfilling.

The invention discloses a preparation method of a high-performance anti-ultraviolet water-repellent polyester fiber. The preparation method comprises the following steps: S1, preparing core-shell composite modified particles; s2, preparing a modified finishing liquid; and S3, carrying out dipping treatment on the polyester fiber by adopting the modified finishing liquid, so as to obtain the high-performance anti-ultraviolet water-repellent polyester fiber. The polyester fiber provided by the invention has excellent ultraviolet resistance and water repellency, titanium dioxide and carbon dots are adopted as main components of an anti-ultraviolet agent, and the core-shell composite modified particles with a special structural system are constructed, so that the excellent ultraviolet resistance can be provided, and the polyester fiber has excellent water repellency. The carbon dots are added into the polyester fiber, the adverse effect caused by the photocatalysis of titanium dioxide can be overcome, the water repellency of the polyester fiber can be improved through the carbon dots, the negative effect of the photocatalysis of titanium dioxide is further reduced, and the carbon dots play multiple improvement roles in the polyester fiber.

The invention discloses a toughened waterproof gypsum composition and a preparation method thereof. The toughened waterproof gypsum composition comprises the following components in parts by weight: 80-250 parts of gypsum powder, 54-150 parts of heavy calcium carbonate powder, 60-95 parts of talcum powder, 75-175 parts of light calcium carbonate powder, 80-105 parts of ash calcium powder, 15-55 parts of melamine powder, 25-65 parts of cellulose, 35-85 parts of a retarder, 70-95 parts of a water repellent and 70-95 parts of a toughening agent. A proper amount of a water repellent and a flexibilizer are added in the preparation of the gypsum composition, the water repellent is organic silicon hydrophobic powder, and the organic silicon hydrophobic powder is ternary fine particles and is composed of a powder carrier, a colloid coating material and an organic silicon active component easy to disperse. The colloid wrapping material can stably preserve the active components in the powder and can be timely released after water is added, the dispersity of the organic silicon hydrophobic powder in water is good, and the hydrophobic performance of the material can be improved; and the flexibilizer is used for improving the brittleness of the gypsum and improving the impact resistance of the gypsum.

The invention discloses a heat insulation cotton felt. The heat insulation cotton felt is formed by curing and drying glass fibers sprayed with an adhesive. The adhesive is prepared from the following components in parts by weight: a modified phenolic resin solution, an organic silicon modified methyl methacrylate pre-polymerized solution, water, pentaerythritol, methyl emulsified silicone oil and dioctyl phthalate, the modified phenolic resin solution is obtained by the following steps: adding formaldehyde into a mixed solution consisting of phenol, xylenol and lignin, and reacting at the temperature of 40-60 DEG C to obtain a first solution; adding 5-15 parts by weight of a sodium hydroxide aqueous solution into the first solution to adjust the pH value of the first solution to 8-9, heating, cooling to 35-50 DEG C, adding sulfuric acid, and stirring to obtain a second solution; 20-40 parts of hexamethylol melamine is added into the second solution in batches. According to the heat insulation cotton felt, the resilience force of the glass fiber cotton felt is kept, and meanwhile the hydrophobic performance of the heat insulation and sound insulation module is improved.

The present application discloses silane monomer, benzocyclobutene silicone resin, device and preparation method, belonging to the field of polymer materials. The chemical structural formula of the silane monomer is as follows: wherein, R1, R2, R3, R4, R5 are independently selected from the following groups: H, alkyl, alkoxy, alkenyl, phenyl; R6, R7, R8 are independently selected from the following groups: H, unsubstituted or substituted C1-C6 alkyl, unsubstituted or substituted C2-C6 alkenyl, unsubstituted or substituted phenyl, 4-vinyl-benzocyclobutene group or hydrolyzed group, and at least one of R6, R7, R8 is a hydrolyzed group; the hydrolyzed group is selected from substituted or unsubstituted amino, alkoxy, acyloxy or -Cl. The silane monomer can undergo a hydrolysis condensation reaction to synthesize a benzocyclobutene silicone resin with adjustable viscosity, without the need for a prepolymerization process, which is convenient for large-scale batch production.

The invention discloses hydrophobic latex powder, and relates to the technical field of latex powder, the hydrophobic latex powder comprises the following preparation raw materials by weight: 8-12 parts of modified polyvinyl alcohol, 500-600 parts of a polymer emulsion, 3-8 parts of an anti-caking agent, and 1.5-2.5 parts of nano silica sol, the modified polyvinyl alcohol is modified by monomer block copolymerization, and the monomer is any one of maleic acid and vinyl group; the nano silica sol is added into the hydrophobic latex powder, so that the hydrophobic agent not only can enhance the functionality, but also can meet the green building standard and meet the environmental protection requirements of modern buildings and products, and is beneficial to sustainable development, the nano silica sol is directly added into the emulsion from the front end to be uniformly mixed, and the problem of non-uniformity during post-mixing is solved; the hydrophobicity of the latex powder is further improved; according to the hydrophobic latex powder disclosed by the invention, the modified polyvinyl alcohol is used for replacing traditional polyvinyl alcohol, so that the hydrophobicity and the strength performance of a water repellent can be enhanced, the preparation process is simple, and industrialization is easy to realize.

The application discloses a preparation method of a water-in-oil emulsion type defoaming agent for shale gas exploitation, which comprises the following steps: adding 32# industrial grade white oil into a beaker, adding yellow block-shaped microcrystalline wax, heating to 70 DEG C to dissolve the microcrystalline wax, adding Span 80 after uniform mixing and stirring, keeping constant temperature magnetic stirring for 10 min, keeping stirring at 70 DEG C for 30 min, adding tertiary distilled water, continuing stirring for 60 min, and finally adding 2g of 5% PVA water solution to obtain the water-in-oil emulsion type defoaming agent for shale gas exploitation. The surface active agent generated after starch modification is used to treat the surface groups, so that the silane groups are attached to the wax surface with low surface energy, are wrapped on the outer surface of the raw material through hydrogen bond or electrostatic force, the hydrophobicity is increased, the surface tension is reduced, and the defoaming purpose is achieved at the gas-liquid interface. The silicon grease material is compounded in the later stage, the silicon-containing groups can be better adsorbed on the outermost layer of the raw material, so that the defoaming is more helpful, and the defoaming rate and defoaming speed are improved.

The invention discloses a cold laminating film for protection. A sound insulation cotton felt is formed by curing and drying glass fibers sprayed with an adhesive; the adhesive is prepared from the following components in parts by weight: a modified phenolic resin solution, an organic silicon modified methyl methacrylate pre-polymerized solution, water, pentaerythritol, methyl emulsified silicone oil and dioctyl phthalate, the organic silicon modified methyl methacrylate prepolymerization liquid is obtained by the following steps: adding 100-200 parts by weight of methyl methacrylate into 100 parts by weight of mixed liquid consisting of a silicon source and an organic solvent, uniformly stirring, and adding deionized water and an initiator to obtain the organic silicon modified methyl methacrylate prepolymerization liquid; the silicon source is formed by mixing tetraethyl orthosilicate and a silane coupling agent, and the weight ratio of the tetraethyl orthosilicate to the silane coupling agent is (1-3): 1. The hydrophobic performance of the heat insulation and sound insulation module is improved, the contact angle of the glass fiber cotton felt reaches 143 degrees, and the hydrophobic performance is excellent.

First umbrella skirts, second umbrella skirts and third umbrella skirts are horizontally arranged on the periphery of a body of the pantograph insulator, the first umbrella skirts are arranged on the upper portion and the lower portion of the body, and the multiple second umbrella skirts are arranged between the first umbrella skirts arranged on the upper portion and the lower portion. The third umbrella skirts are arranged between the adjacent first umbrella skirts and second umbrella skirts or between the adjacent second umbrella skirts, the body, the first umbrella skirts and the second umbrella skirts are in an elliptical cone shape, long axes of the body, the first umbrella skirts and the second umbrella skirts are arranged in the advancing direction of a vehicle, short axes of the body, the first umbrella skirts and the second umbrella skirts are arranged in the width direction of the vehicle, and the third umbrella skirts are in a fan shape. The first umbrella skirts are symmetrically arranged on the two sides of the body in the width direction, and the projection gt of the first umbrella skirts on the radial plane of the body; the projection gt of the second umbrella skirt on the radial plane of the body; and the projection of the third umbrella skirt on the radial plane of the body. A rainwater path and an electrode discharge path are separated, and the insulation performance of the insulator is guaranteed.

The invention belongs to the technical field of concrete surface reinforcing agents, and discloses a multi-component concrete surface reinforcing agent and an application method thereof. The multi-component concrete surface reinforcing agent comprises four components, a component A comprises a modified penetrant, fluorocarbon modified polyacrylate and C12-14 fatty alcohol, a component B comprises a silane coupling agent, magnesium naphthenate, ethanol and water, a component C comprises potassium trifluoroborate, a modified penetrant and water glass, and a component D comprises potassium trifluoroborate, a modified penetrant and water glass. The component D is prepared from isobutyltriethoxysilane, a coalescing agent and sodium methyl silicate. The multi-component concrete surface reinforcing agent is sprayed in a staged manner during application, firstly, the component A is used for breaking through'veins' and improving the penetration depth of each component in concrete, secondly, the component B and the component C sequentially penetrate into the concrete to form crystals to improve the surface rebound strength of the concrete, and finally, the component D plays a role in'closing ', so that the durability of the concrete is improved, and the service life of the concrete is prolonged. Finally, the effects of enhancing permeation and improving the surface rebound strength and durability of the concrete are achieved.

The application discloses a kind of thermal insulation cotton felt, the thermal insulation cotton felt is formed by the glass fiber that is sprayed with adhesive solidification and drying;Adhesive is composed of the following components by weight parts: modified phenolic resin solution, methyl methacrylate prepolymers liquid modified by silicone, water, pentaerythritol, methyl emulsified silicone oil, dioctyl phthalate;Modified phenolic resin solution is obtained by the following steps: in the mixed solution consisting of phenol, dimethyl phenol, lignin, add formaldehyde, and obtain first solution under the condition of temperature 40~60 ℃ reaction;5~15 weight parts of sodium hydroxide solution is added in first solution to adjust the pH value of first solution to 8~9, and after heating, temperature is reduced to 35~50 ℃, add sulfuric acid and stir to obtain second solution;20~40 portions of hexamethylol melamine are added in second solution in batches.The thermal insulation cotton felt of the application improves the hydrophobic property of thermal insulation and sound insulation module while maintaining the resilience of glass fiber cotton felt.