46results about How to "Improve mechanical wear resistance" patented technology

An electrical heating element, in particular for a hot-wedge film welding device, having two electrodes and a heating resistor arranged between the electrodes such that an application of an electrical voltage to the electrodes results in heat being produced along the length of the heating resistor. The heating resistor is designed to correspond to the shape of a heating wedge of a film welding machine, such that it can replace the heating cartridge and the hot wedge of a conventional film welding device. It is preferably produced from a conductive ceramic material and is distinguished by uniform heat distribution, good thermal conductivity and resistance to wear, as well as by excellent corrosion resistance.

The invention provides a silicon dioxide nanometer composite material and a preparation method and application thereof. The silicon dioxide nanometer composite material is mainly formed by compoundingsilicon dioxide nanoparticle suspension and nanometer silicon dioxide acidic sol, wherein the particle size of silicon dioxide nanometer particles in the silicon dioxide nanometer particle suspensionis 5-30 nm; the nanometer silicon dioxide acidic sol is provided with chain nanosilicon dioxide, and the veneer content of the nanometer silicon dioxide acidic sol is 70-90%. A silicon dioxide nanometer composite thin film prepared from the silicon dioxide nanometer composite material has good effects of antireflection, self cleaning and mist prevention, meanwhile has good mechanical abrasion resistance and weather resistance, is good in firmness with a matrix, is not limited during usage, can exert effects for a long term in the field, and is wide in application range.

The invention relates to a silicon dioxide hollow sphere nano composite material, and a preparation and application thereof, and relates to the field of nano materials. The preparation method of the silicon dioxide hollow sphere nano composite material comprises the following steps: separately preparing a silicon dioxide hollow sphere suspension and a nano silicon dioxide acidic sol, mixing the silicon dioxide hollow sphere suspension with the nano silicon dioxide acidic sol by stirring, and then carrying out standing to obtain the silicon dioxide hollow sphere nano composite material. A silicon dioxide nano composite coating prepared from the silicon dioxide nano composite material disclosed by the invention has good anti-reflection, permeability-increasing, self-cleaning and anti-fog effects, and meanwhile, the coating also has good mechanical wear resistance and weather resistance, and has good firmness with a substrate. High-temperature calcination or other post-treatment modes arenot needed for preparing the coating, the coating can exert an effect outdoors for a long time, and the application range is wide.

The invention provides a polymer brush modified transparent anti-fog patch and a preparation method thereof, and belongs to the technical field of anti-fog materials. The polymer brush modified transparent anti-fog patch comprises a transparent polymer base film, a hydrophilic polymer brush layer located on one side of the transparent polymer base film and an organic binder layer located on the other side of the transparent polymer base film. And the hydrophilic polymer brush layer grows on the surface of the transparent polymer base film in a grafting manner in a photo-initiation manner. According to the invention, the hydrophilic polymer brush layer is generated through photo-initiated surface free radical polymerization, and the hydrophilic polymer brush layer is connected with the transparent polymer base film through covalent bonds, so that the bonding strength is high, and the problem that the anti-fog performance is reduced due to loss of a hydrophilic polymer under the hydration effect can be avoided; the grafted hydrophilic polymer brush chain segment can quickly absorb water mist and hydrate and form a transparent water film to generate an anti-fog effect, and the hydrophilic polymer brush layer has excellent mechanical wear resistance.

The invention relates to a preparation method of a carbon-ceramic brake material with strong oxidation resistance. The method is based on a three-dimensional needled carbon/ceramic brake material. A carbon/carbon-boron carbide composite material is obtained by introducing a CVI deposition B4C process technology between pyrolytic carbon and pyrolytic carbon; a siliconizing treatment is carried outafter a high-temperature treatment; the antioxidant carbon/carbon-boron carbide-silicon carbide composite material with a density of 1.9 g/cm<3> to 3.0 g/cm<3> is obtained; according to the method, the pyrolytic carbon matrix and the carbon fibers in the boron carbide layer can be effectively protected from being eroded by oxygen, meanwhile, the pyrolytic carbon layer outside the boron carbide layer is not influenced and reacts with molten silicon to generate silicon carbide, the integrity of the boron carbide layer is protected; the distribution uniformity of ceramic phases in each area is improved, the mechanical wear resistance of a carbon/carbon area is improved by utilizing the high hardness of boron carbide, the expansion path of cracks in the material failure process is prolonged through the multi-layer structure design, stress release is facilitated, the bearing capacity of the matrix is improved, and the strength and toughness of the brake material become better.

A diamond-like carbon coating is provided on a metal interior surface of a sample chamber of a well fluid sampling apparatus to render the sample chamber substantially impervious to the absorption of at least H₂S, mercury, and/or mercaptans. The coating is a dense, amorphous, diamond-like carbon with an sp3 content greater than about 65% and is composed of about 70 percent (%) carbon, 30 percent (%) hydrogen. The coating may be applied over the surface in one or more layers by a suitable method, e.g., plasma assisted chemical vapor deposition or a PAVCD process, and is between about 10 and about 20 microns thick. One or more of the layers of the coating includes a small percentage of silicon to increase both the adherence to the metal interior surface of the sample chamber and the absorption resistance of the coating. The resulting sample chamber provides H₂S, mercaptan, and mercury retention of greater than about 95% of the original concentration in samples stored up to 14 days.

The invention relates to the field of rubber preparation, in particular to rubber composition containing a silane coupling agent and carbon nanotubes and a preparation method of the rubber composition. The rubber composition is prepared from substances as follows: rubber, the silane coupling agent, 0.1-5 parts by weight of the carbon nanotubes, white carbon black and an aid, wherein the aid is prepared from a softener, an anti-ageing agent, sulfur and a vulcanization accelerator. The preparation method comprises steps as follows: the rubber, the silane coupling agent, the carbon nanotubes and the white carbon black are added to water to be mixed, and a suspending liquid is prepared; a flocculant is added to the suspending agent, and the mixture is dried; a product is added to an internal mixer, the softener and the anti-ageing agent are added, and the mixture is mixed; secondary mixing is performed, and super glue is cooled; the super glue is added to sulfur and the vulcanization accelerator, and the rubber composition is obtained after being turned and batched out. Due to the special structure of the carbon nanotubes and the function of a group of the silane coupling agent, additives in the rubber are more uniformly mixed, the property of finished products of the rubber is more stable, and besides, the performance of the rubber in the aspects of mechanical abrasion resistance, corrosion resistance, rebound resilience, low-compression permanent deformation and the like is remarkably improved.

The invention provides a self-cleaning coating with transmittance-increasing and wear-resisting functions and a preparation method of the self-cleaning coating, belongs to the technical field of building coatings and solves the problems of poor wear resistance and hydrophilicity of a conventional self-cleaning coating. According to the method, ammonia water and tetraethoxysilane are added to a reaction container containing absolute ethyl alcohol and stirred at the temperature of 60 DEG C for 8-12 h, and solid SiO2 nanoparticles are obtained; then, the solid SiO2 nanoparticles, hexadecyl trimethyl ammonium bromide and diethylamine are mixed and stirred in a water bath at the temperature of 60 DEG C for 1-2 h, tetraethoxysilane is added, the mixture reacts for 3 h, and a reaction solution is obtained; finally, hydrogen peroxide is added to the reaction solution and stirred, the obtained product is centrifuged and washed, and the self-cleaning coating with the transmittance-increasing and wear-resisting functions is obtained. The invention further provides the self-cleaning coating with transmittance-increasing and wear-resisting functions, which is prepared with the preparation method. The coating has high light transmittance, good mechanical wear resistance and excellent wettability.

The invention discloses a heat transfer printing paper detaching agent preparation method which includes the steps: material preparation: grinding carboxyl acrylic resin and epoxy acrylic resin into fine powder and sieving the fine powder by a 160-mesh screen; proportioning: in weight percent, preparing 10-40% of carboxyl acrylic resin, 10-40% of epoxy acrylic resin, 5-30% of white carbon black, 5-30% of amide wax, 5-20% of dodecanedioic acid, 3-15% of organic zinc salt and 10-20% of canola oil into a backing material; mixing: transferring the prepared backing material into a vertical mixing cylinder and mixing the prepared backing material for 10-30 minutes to prepare a heat transfer printing paper detaching agent. The invention further discloses the heat transfer printing paper detachingagent and an application of the heat transfer printing paper detaching agent to the technical field of heat transfer printing. The stability of a heat transfer printing powder coating can be effectively improved by the heat transfer printing paper detaching agent.

The invention discloses an anti-static coating material and a preparation method thereof, and an anti-static coating and a forming method thereof, the anti-static coating material is characterized by comprising a chelate of polymer molecules and metal ions and a conductive nano-material, the polymer molecules contain amino groups, and when the anti-static coating material is prepared, the polymer molecules contain amino groups, and when the anti-static coating material is prepared, the polymer molecules contain amino groups. A conductive nano material is used as a main conductive material, the conductive requirement of the coating can be met, a polymer containing amino and a chelate of metal ions are added, amino in polymer molecules interacts with the metal ions, a compound with conductive performance is obtained, the conductive performance of the anti-static coating is further improved, and meanwhile the anti-static performance of the anti-static coating is improved. And the mechanical wear resistance of the coating can also be improved.

The invention provides a super-hydrophobic phenolic sheet and a preparation method thereof. The preparation method comprises the following steps: firstly, preparing a phenolic resin/organic solvent mixed solution with a preset concentration, infiltrating a paper-based material with the prepared mixed solution, and carrying out drying to obtain a prepreg; carrying out stacking hot press molding treatment and pretreatment on the prepreg to obtain a phenolic sheet; then, preparing a polyvinyl chloride/tetrahydrofuran mixed solution, and adding an organic solvent to obtain a super-hydrophobic coating; and finally, subjecting the surface of the phenolic sheet to spraying-drying treatment with the super-hydrophobic coating so as to obtain the super-hydrophobic phenolic sheet. The super-hydrophobic phenolic sheet provided by the invention has impact strength of 11.978 kJ/m<2>, a density of 1.41 g/cm<3>, elastic modulus of 23.8 GPa and bending strength of 642.7 Mpa and a contact angle of 160 degrees or above; and the contact angle of the super-hydrophobic phenolic sheet with kraft paper attached to the substrate of the phenolic sheet can be kept at 155 degrees or above, so the super-hydrophobic phenolic sheet has an excellent hydrophobic property.

The present invention relates to a floating noise reduction system for moving and/or falling fluids, the process for manufacturing of such system and the use of such system.

The invention relates to a hydrophobic SiO2 nano mixed liquor, a functional coating and preparation. The hydrophobic SiO2 nano mixed liquor is formed by compounding a hydrophobic SiO2 nano particle suspension modified by an organic fluorine functional group and a nano-SiO2 acid sol; the average particle size of the hydrophobic SiO2 nano particles in the hydrophobic SiO2 nano particle suspension is10nm, and the particle surfaces are modified by the organic fluorine functional group; the nano-SiO2 acid sol has chain-shapednano-SiO2, and the condensation degree of the nano-SiO2 acid sol is 70-90%. The functional coating prepared on the glass surface by using SiO2 nano mixed liquor has the good anti-reflection performance (the light transmittance is greater than 96%) and the superhydrophobicperformance (the contact angle is greater than 150 degrees), and the properties of superhydrophobic self-cleaning, antifogging, oil stain prevention and the like can be achieved; the coating has goodmechanical wear resistance, and is firmly combined with the substrate, using is not limited, the coating can be used for playing a role for a long time outdoor, and the range of application is wide.

Aqueous acid binary silver-bismuth alloy electroplating compositions and methods enable electroplating silver rich binary silver-bismuth deposits. The aqueous acid binary silver-bismuth alloy electroplating compositions include 5-membered heterocyclic nitrogen compounds with a thiol functionality which enable deposition of the silver rich binary silver-bismuth alloys. The silver rich silver-bismuth deposits are matte to semi-bright, uniform and have a low coefficient of friction.

The invention belongs to the field of optical film, and more specifically relates to a high reflectivity multilayer heat insulation window film which his high in reflectivity on infrared light, and apreparation method thereof. The high reflectivity multilayer heat insulation window film comprises a PET sealing layer, a first reflecting layer, a second reflecting layer, a third reflecting layer, afourth reflecting layer, a fifth reflecting layer, a sixth reflecting layer, a seventh reflecting layer, an eighth reflecting layer, a ninth reflecting layer, a tenth reflecting layer, an eleventh reflecting layer, a twelfth reflecting layer, a thirteenth reflecting layer, a fourteenth reflecting layer, and a PET substrate layer, which are laminated successively, and is prepared through magnetronsputtering. The high reflectivity multilayer heat insulation window film is invented based on optical interference enhancing principles, reflective constructive interference of light of different wavelengths in infrared light is realized, so that transmission effect is reduced, high reflective effect on infrared light (800 to 1500nm) is achieved, and the transmittance is only 8%.

A drive belt having a belt body which is made of a flexible material and a tensile reinforcement that extends in belt axial direction and which is surrounded by said belt body in sections at least to improve the tensile strength of the body in belt longitudinal direction wherein the tensile reinforcement is a carbon cord made of a plurality of twisted carbon fibers with a plurality of cavities between the fibers which are charged with a filler material in part at least. A first portion of the carbon fiber cavities is charged with a rupture risk reducing filler of a type different from the belt body flexible material and a second portion of said cavities of the carbon fibers is filled with belt body flexible material. The carbon cord has less than 0.2 mg of belt body flexible material per one millimeter³ cord volume.

Aqueous acid binary silver-bismuth alloy electroplating compositions and methods enable electroplating silver rich binary silver-bismuth deposits. The aqueous acid binary silver-bismuth alloy electroplating compositions include thiol terminal aliphatic compounds having carboxyl or sulfonic groups which enable deposition of silver rich binary silver-bismuth alloys having deposits which are matte to semi-bright, uniform and have a low coefficient of friction.

The invention provides an auxiliary anode assembly for cathode protection of an ice breaker, and belongs to the technical field of electrochemistry. The auxiliary anode assembly comprises an anode body, a conductive rod, an anode bracket and a perforated protective cover. The anode bracket is made from insulating materials, and the anode body is arranged in the anode bracket. The conductive rod isconnected to the back of the anode body and used for electric connection of a cable and the anode body. The perforated protective cover is made from insulating materials, is fixed on the top of the anode bracket, and is sealed and fixed to the anode bracket. A boron-doped diamond intermediate layer is deposited on a titanium substrate in advance, so that the stability and the mechanical abrasionresistance of the anode body are remarkably improved. The anode bracket is matched with the rigid insulation perforated protective cover to physically isolate the anode body from floating ice, so thatmechanical damage is not likely to occur, effective discharge of cathode protection current is guaranteed, and the auxiliary anode assembly can reliably work for a long time in an ice navigation process, is suitable for an impressed current cathode protection system of a polar navigation ship, and is used for preventing seawater corrosion of a ship shell, a rudder plate and a propeller.