33results about How to "Strong hydrophobic" patented technology

The invention provides a hydrophilic modified PVDF (polyvinylidene fluoride) and PU (polyurethane) mixed taper hole ultrafilteration membrane and a preparation method thereof. The taper hole ultrafilteration membrane is prepared by the following steps: taking PVDF as a base material, PU as a reinforced additive and polyvinylpyrrolidone as a hydrophilic additive; adding diluents-DMAC (dimethylacetamide) and polyethylene glycol 600, and processing to obtain a membrane preparation raw material solution; extruding the membrane preparation raw material solution and an inner coagulating solution-DMAC solution with the temperature difference of 8-15 DEG C through a concentric spinneret to obtain hollow fibers; and soaking, reaming, dehydrating and airing. The hydrophilicity and the stretching strength of a PVDF base membrane are improved; and by changing the coagulating bath composition and the wire drawing process, micropores in a flow guide layer are controlled to be 0.12-0.18 mu m, micropores in a filter layer are controlled to be 0.05-0.09 mu m, pores in the membrane form a 'cone funnel shape', small particles can be effectively intercepted, the recovery rate of a backwardly washed and chemically washed membrane is increased, and the blocking rate of the membrane in the running process is increased.

The invention belongs to the technical field of photocatalytic self-cleaning materials, and specifically relates to a Pt-TiO2-SiO2 photocatalytic self-cleaning composite material and a preparation method thereof. The preparation method comprises the following steps: subjecting a mixed solution of oxalic acid, water, absolute ethyl alcohol and hydroxyl-terminated polydimethylsiloxane and a mixed solution of isopropyl titanate, a chloroplatinic acid solution and absolute ethyl alcohol to mixing with tetraethyl silicate, and carrying out a one-step reaction under the irradiation of ultraviolet light so as to obtain a photocatalytic self-cleaning composite material. According to the invention, with the oxalic acid as a catalyst and a chelating agent, high-activity anatase phase titanium dioxide can be prepared without the need of calcination, and a uniform sol is obtained; with the hydroxy-terminated polydimethylsiloxane as an organic additive, an organic / inorganic composite system material with stable structure and strong hydrophobicity and self-cleaning ability is obtained; and by adoption of a photoreduction method, platinum ions can be reduced and loaded onto the surface of titanium dioxide. The preparation method provided by the invention is simple; and the composite material obtained by using the preparation method provided by the invention has the advantages of strong adhesion force, transparency, wide photoresponse range and high catalytic activity.

The invention relates to a method for preparing a cuprous oxide electrode. The method comprises the following steps: cleaning the copper sheet ultrasonically, and then immersing it in sulfuric acid or hydrochloric acid solution to obtain a treated copper sheet; using the treated copper sheet as a cathode and a platinum sheet as an anode, inserting it into an electrodeposition solution, at room temperature , The current density is 40~120mA / cm 2 Under the condition of direct current electrodeposition for 3-8 minutes, then dry the sample at 130-170°C to obtain the cuprous oxide electrode. The electrodeposition solution is composed of adding 0.02mol divalent copper salt, 0.5-1.5g ferric salt, 0.1-0.3g quaternary ammonium salt and 0.1-0.3g organic amine compound for every 80-120g deionized water. The invention has simple process, low cost, good controllability and excellent product performance.

The invention discloses a self-cleaning type real stone lacquer and a preparation method thereof. The self-cleaning type real stone lacquer comprises the following components in percentage by weight: 55%-60% of natural gravels, 15%-20% of stone powder, 15%-20% of adhesion agents, 2%-4% of water repellents, 3%-5% of tailing powder and 3%-5% of dispersing agents. The self-cleaning type real stone lacquer disclosed by the invention has the characteristics of strong hydrophobic capacity and oil pollutant-resistant capacity, fire prevention, water prevention, acid-base resistance, pollution resistance, no toxicity, no odor, high adhesion power, color permanence, easiness and convenience for construction, easiness for drying, time saving, energy conservation, environmental friendliness and the like, can be used for effectively preventing the erosion of an external harsh environment on a building and prolonging the life of the building and has good adhesive power and freeze thawing resistant property, thereby being suitable for being used for various regions.

The invention relates to anti-sticking wear-resistant treatment of a metal substrate, in particular to a metal substrate with a thermally-sprayed anti-sticking wear-resistant coating and a preparation method thereof as well as a driving roller adopting the substrate. A nickel-based alloy coating is arranged on the surface of the metal substrate with the thermally-sprayed anti-sticking wear-resistant coating, and a silicon polymer resin layer is arranged on the surface of the nickel-based alloy coating in a disperse combination mode. The invention also discloses a method for preparing the metal substrate with the thermally-sprayed anti-sticking wear-resistant coating as well as a driving roller adopting the metal substrate. The product disclosed by the invention has the advantages that the anti-sticking effect is improved, the service life is prolonged, the equipment maintenance and repair strength and period are reduced, the equipment service efficiency is increased, the product quality is improved, and the production cost is lowered.

The embodiment of the present invention discloses a room temperature multiple self-crosslinking nanometer acrylate copolymer emulsion and its preparation method and a water-based wood paint based on the emulsion. The preparation and synthesis components of the emulsion include ethylenically unsaturated carboxylic acid, formazan Acrylate, Acrylate, Styrene, Modified SiO 2 Dispersion with acrylate monomer, cross-linking monomer A, vinyl siloxane, cross-linking monomer B, etc., and by introducing modified nano-SiO 2 The three cross-linking methods of cross-linking monomer, vinyl siloxane run through the preparation of multiple self-cross-linking nano-acrylate copolymer emulsions at room temperature. Water-based wood paint forms a dense protective film, which has excellent water resistance, alcohol resistance, scratch resistance, high temperature stickiness resistance and relatively high hardness. The paint film performance can be comparable to solvent-based furniture paint.

The invention discloses a waterproof antifouling protection spray and a preparation method thereof, and relates to a mixture compound. The waterproof antifouling protection spray comprises the following components in percentage by mass: 10-15% of polytetrafluoroethylene micro powder, 5-10% of fatty alcohol-polyoxyethylene ether, 20-25% of glycolic acid, 10-15% of copper oleate, 10-15% of polyvinyl butyral, 20-25% of allyl alcohol, 3-5% of a nonionic fluorocarbon surfactant and 10-15% of an LPG propellant. After being sprayed, the waterproof antifouling protection spray disclosed by the invention has excellent properties of being good in lotus leaf dual-hydrophobicity, self-cleaning property, hydrophobicity, water resistance, antifouling property, scrubbing resistance and the like.

The invention relates to a dust-proof composite non-woven fabric and a preparation method thereof, and belongs to the technical field of non-woven fabrics and its preparation. The dust-proof composite non-woven fabric comprises a non-woven fabric composite layer and a nano-coating uniformly sprayed on the surface of the non-woven fabric composite layer, and the non-woven fabric composite layer consists of a first non-woven fabric layer, a second non-woven fabric layer The cloth layer and the third non-woven fabric layer are compounded sequentially. The dust-proof composite non-woven fabric is made of different non-woven fabrics by hot-melt spinning, and then hot-rolled and composited, and then the nano-coating is vacuum sprayed on the non-woven composite layer to obtain the finished product. The invention has the advantages of good dustproof effect, high strength and simple preparation process.