86results about How to "Change roughness" patented technology

The invention disclose a modified sand body, which is formed by the mixing of solution and sand, wherein the solution with cohesiveness and adhesion is formed by dissolving water-soluble solid state organic substance in water. According to the invention, after the water is evaporated, the water-soluble solid state organic substance can bond sand particles, and dissolve in water again to form the solution with the cohesiveness and the adhesion to bond the sand particles; the modified sand body allows a common sand body to be in 'pedogenesis', changes the interaction relation between sand body particles, and forms a particle pore structure with binding force (cohesive force); when the modified sand body is in the use process, the substance is difficult to run off due to the characteristics of the cohesiveness and the adhesion; the sand body is allowed to have same properties of stabilizing and storing moisture and nutrient as the properties of the soil, so as to be able to provide strong conditions for the growing of plants, and be an ideal measure for the governing of deserts; meanwhile, the modified sand body can also be taken as a means to utilize sand resources of a sand beach and the like to conduct plant planting.

The invention provides a silicon dioxide-coated carbon nano tube-epoxide resin composite material with electric insulation property and high heat-conducting effect and a preparation method thereof, aiming at solving the defects of low coefficient of heat conductivity and the lack of electric insulation property of the existing carbon nano tube-filled composite materials. The steps are as follows: the sol-gel method is used for preparing SiO2-coated carbon nano tubes, and the tubes are dispersed in epoxide resin and then are solidified and molded. The material of the invention has the advantages that the use level of the silicon dioxide-coated carbon nano tube is low, the material can be favorably dispersed in the epoxide resin, the heat-conducting property of the carbon nano tube is played, and the surface of the carbon nano tube is enabled to be insulating, thereby improving the heat-conducting property of a polymer and meeting the requirement on electrical insulation property.

The invention discloses a vacuum aluminizing/cathode electrophoresis composite protective technique for an NdFeB magnet, which relates to a surface treatment protective technique for an NdFeB magnet and an NdFeB magnet with a composite protective layer. The invention aims to provide a vacuum aluminizing/cathode electrophoresis composite protective technique for an NdFeB magnet, which has the advantages of high production efficiency and high corrosion resistance, and an NdFeB magnet with a composite protective layer composed of a vacuum aluminizing film and an electrophoresis epoxy resin paint film. The vacuum aluminizing/cathode electrophoresis composite protective technique for an NdFeB magnet comprises the following steps: (1) removing oil and rust from an NdFeB magnet; (2) carrying out vacuum aluminizing on the NdFeB magnet; (3) carrying out surface finish and passivation on the NdFeB magnet subjected to the vacuum aluminizing; (4) carrying out cathode electrophoresis on the NdFeB magnet, wherein the cathode electrophoresis liquid is single-component epoxy resin paint or double-component epoxy resin paint; and (5) drying and curing the NdFeB magnet subjected to the cathode electrophoresis.

The invention provides a back-out type wind tunnel changeable rough element device, comprising four main units of a plurality of rough elements, a hole opening flat plate, a lower flat plate (or a frame) and a hinge. The device is characterized in that the shape of the rough element is a quarter cylindrical section. One straight edge of the rough element is hinged on the hole opening flat plate, and the other straight edge is hinged on the lower flat plate (or the frame) which is arranged under the hole opening flat plate and is parallel with the hole opening flat plate. The hole opening flat plate and the bottom plate of the wind tunnel are trimly fixedly installed, ensuring that the rough element can back out from the upper surface of the hole opening plate through moving the lower flat plate (or the frame) to one direction. The back-out amount of the rough element can be controlled through changing the moving amount of the lower flat plate, with the result that the roughness of the whole hole opening plate can be changed, and varieties of near surface air currents which simulate atmospheric boundary layer are formed in the wind tunnel. The device can realize the stepless regulation to the height of the rough element simply and quickly.

The invention discloses a method for governing tibbas by utilizing modified sand. The modified sand is paved on the surface of a tibba to be governed, and is formed by dissolving a water-soluble solid organic matter in water to form a cohesive and adhesive solution, and mixing the cohesive and adhesive solution with sand; after moisture evaporates, the water-soluble solid organic matter can bond sand, and can be dissolved in water again after meeting water to form the cohesive and adhesive solution to bond sand. According to the invention, common sand can serve as soil; the interaction among sand grains is changed fundamentally; a particle pore structure with binding force (sticking force) is formed; after repeated evaporation and wetting, materials cannot run off easily due to the cohesive and adhesive properties, and the modified sand can be as stable as soil, and can store water and nutrients as soil. Therefore, the method provides a solid condition for tree growth, and is an ideal tibba governing measure.

The invention discloses a preparation method of a controllable hydrophobic bacterial cellulose-zein composite film. The method comprises the following steps: firstly, preparing and purifying a bacterial cellulose film; then soaking the bacterial cellulose film into an ethanol-water solution to perform replacement treatment; then preparing a zein solution; reacting the bacterial cellulose film and the zein solution, and performing solvent evaporation after reaction ends to obtain a bacterial cellulose-zein composite wet film; and performing drying treatment to obtain the bacterial cellulose-zein composite film. The prepared bacterial cellulose-zein composite film disclosed by the invention has adjustable high hydrophobicity, excellent mechanical performance and biocompatibility, and can play roles of controlling and enhancing the adhesion capacity of cells, accelerating the tissue repair, and the like; and moreover, the preparation method disclosed by the invention is simple and convenient to operate, can be suitable for large-scale industrial production, and has relatively good application prospects in biomedical material industry.

The invention discloses a sand control method using modified sand soil for tree planting. The modified sand soil as a basis of the growth of trees is paved on sand which is to be controlled. The modified sandy soil is formed by stirring and mixing of a solution having a caking property and adhesivity and sandy soil, wherein the solution is formed by dissolving water-soluble solid organic matters in water. After the water is evaporated, the water-soluble solid organic matters can conglutinate grains of the sand soil, and when the water-soluble solid organic matters meet the water, the solid organic matters can again dissolve in the water to form the solution having the caking property and adhesivity, and the grains of the sand soil are conglutinated. Through use of the modified sandy soil, interaction relationship among the grains of the sand soil can be fundamentally changed, and a grain-pore structure having bonding force (cohesive force) is formed. Trees can be directly planted in the modified sandy soil. In the course of use of the modified sandy soil, matters are hard to lose due to the characteristics of the caking property and adhesivity, so that the modified sand soil has soil-like stability and water and nutrient storing properties, can be directly used as a basis of tree planting, can provide solid conditions for plant growth, and is an ideal measure for sand control.

The invention discloses a polylactic acid/ZIF-8@C600 composite material and a preparation method and application thereof. The composite material is prepared from polylactic acid and ZIF-8@C600 composite nano modifier which are carbon black particles with ZIF-8 loaded on the surfaces in the mass ratio of (99.9-99.0):(0.1-1.0). Accordingly, a solution blending method is adopted, a polylactic solution and ultrasonic dispersion liquid of dichloromethane of the ZIF-8@C600 composite nano modifier are blended in proportion, and the composite material is obtained through an electrospinning method. Thehydrophobic property and oil absorbency of the composite material are obviously improved, and meanwhile the oil-water separation performance is achieved; in addition, the product is biodegradable, safe, reliable, free of peculiar smell and low in damage and pollution degree to the human body and environment.

The invention relates to a method for controlling grassland wind erosion desertification. According to the method, shrubs and herbaceous plants are sown in a mixed mode for forestation, and then tree seedling planting is conducted for forestation. Specifically, the method comprises the following steps that (1) the shrubs and the herbaceous plants are sown in the mixed mode, wherein land preparing, sowing and soil covering are conducted, according to the sowing mode, hedysarum laeve maxim and oat are sown in a mixed mode, and according to the mixed sowing mode, the mode of 1 m*0.80 m or 1 m*1 m is adopted at the edge perpendicular to the prevailing wind direction, and the mode of 1.5 m*1.5 m or 2 m*2 m is adopted in a flat region; (2) tree planting is conducted for forestation, wherein the adopted space between rows is 4 m*4 m or 6 m*6 m or 8 m*8 m, the specification is 40*40 or 50 cm*50 cm, and the seedlings are planted for forestation. According to the method, the root systems of trees are developed, the fruit bearing amount is large, the natural renewability is strong, and the emergence rate of seeds is higher than 90%. A large area of pinus sylvestris sand-fixation forest is built, and positive effects are achieved on controlling land desertification and improving the local ecological environment.

The invention disclose a preparation method for a modified sand body, which comprises the following steps: water-soluble solid state organic substance is dissolved in water to form solution with cohesiveness and adhesion, and the solution is mixed with sand. According to the method, after the water is evaporated, the water-soluble solid state organic substance can bond sand particles, and dissolve in water again to form the solution with the cohesiveness and the adhesion to bond the sand particles; the modified sand body allows a common sand body to be in 'pedogenesis', changes the interaction relation between sand body particles, and forms a particle pore structure with binding force (cohesive force); when the modified sand body is in the use process, the substance is difficult to run off due to the characteristics of the cohesiveness and the adhesion; the sand body is allowed to have same properties of stabilizing and storing moisture and nutrient as the properties of the soil, so as to be able to provide strong conditions for the growing of plants, and be an ideal measure for the governing of deserts; meanwhile, the modified sand body can also be taken as a means to utilize sand resources of a sand beach and a sand to conduct plant planting.

The invention relates to a tunnel fire simulation experiment device under the action of multi-angle canyon wind, which belongs to the technical field of fire safety and comprises an experiment table main body, a canyon wind system and a matched measurement and control system, wherein the experiment table main body comprises a tunnel model movably connected to a bracket; the canyon wind system comprises a draught fan and a rectification box which are movably connected to the bracket, and an air outlet of the draught fan is communicated with the rectification box through a soft connection section. The rectification box comprises a butt joint section, a rectification section and a current stabilization section which are connected in sequence. The device is simple in structure, the device is simple in structure and low in manufacturing cost, makes up the defects that a full-size experiment is high in cost and a numerical simulation tool is not accurate enough, guarantees the repeatabilityof the experiment, and has great application value and important guiding significance for developing laboratory scientific research and the influence of actual canyon wind on bridge tunnel ventilationand tunnel fire in a high-altitude area.

The invention discloses a laser interference nanolithography system for one-step titanium alloy implant surface texturing and modification. The laser interference nanolithography system comprises a high-power laser, a beam-splitting system, a wave plate and a polarizer. The laser interference nanolithography system is characterized in that two light beams are intervened, interference light beam parameters are controlled according to different implantation positions, a groove pattern produced through laser interference of the two light beams is utilized for directly processing the surface of a titanium alloy implant, a groove structure with the characteristic dimension adjustable from 100nm to 20 microns is formed, the geometrical morphology and the roughness of the surface of a material are changed, bio-mechanical bonding property of the titanium alloy implant with a bone is improved, osteoblast chemotaxis is guided, the biocompatibility of the implant is improved, and one-step titanium alloy implant surface texturing and modification is realized.

The invention discloses a redox flow cell stack. The redox flow cell stack is formed by connecting a plurality of single batteries in series, wherein each single battery comprises a bipolar plate, an electrode, an electrode frame and an ion conduction film, and in the cell stack, a part structure comprising the single battery at an initial section and/or a tail section is different from a part structure comprising other single batteries. By improving the structures of the batteries at the initial section and the tail section, the bipolar plate of the single battery at the initial section or the tail section is changed to a material with relatively small conductivity and relatively large roughness, the ion conduction film of the battery at the initial section or the tail section is changed to a film material with relatively small resistance and more excellent performance, so that the voltage range of the refox flow cell stack is effectively reduced, the voltage consistency of the single battery in the cell tack is greatly improved, the unfavorable influence on a battery system due to long-term running of the cell stack in a relatively high voltage range is prevented, and the long-term running stability of the battery system is improved.

The invention discloses a cold-resistant oil-resistant flame-retardant polyvinyl chloride cable material without pungent smell. The cold-resistant oil-resistant flame-retardant polyvinyl chloride cable material without pungent smell comprises, by mass, 20-25 parts of resin powder, 15-20 parts of plasticizer, 5-10 parts of lubricant, 10-15 parts of carbon black, 8-13 parts of stabilizer, 9-14 parts of polyethylene glycol, 17-22 parts of flame retardant, 7-12 parts of Elvaloy and 16-21 parts of nitrile butadiene rubber powder. The cold-resistant oil-resistant flame-retardant polyvinyl chloride cable material without pungent smell and a preparation method have the advantages that since polyethylene glycol is added into a preparation process, the intrinsic pungent smell of the materials can be eliminated; the plasticizer, the Elvaloy and the nitrile butadiene rubber powder are added into the preparation process, so that the prepared material is resistant to cold and oil; the nitrile butadiene rubber powder is capable of assisting the Elvaloy in preventing the plasticizer from separating out, and the Elvaloy is a non-migrating terpolymer and endows a PVC (polyvinyl chloride) polymer with high durability and high heat stability.

The invention discloses a hydrophobic starch-fiber composite foam material which is prepared from 100 parts of starch, 10-50 parts of plant fibers, 10-30 parts of a plasticizer, 1-10 parts of a filler, 1-5 parts of a silane coupling agent and 0.5-2.5 parts of a hydrophobic agent. The material has the advantages of uniform pore distribution, high porosity, good resilience, low density, hydrophobicsurfaces and oil-water selectivity. Compared with extrusion and mould pressing process methods, the preparation method of the hydrophobic starch fiber composite foam material disclosed by the invention has the advantages that a freezing replacement method is adopted, the requirement on operation equipment is low, the operation is simple and safe, and the size, the dimension and the shape of a sample can be controlled.

The invention discloses a nutrient modified sand body for plantation. The nutrient modified sand body for plantation is formed by stirring and mixing of a solution, sand and nutrients, wherein the solution has a caking property and an adhesion property, and is formed by dissolving water-soluble solid organic substances into water. The solution can conglutinate sand grains after the solution is stirred and mixed with the sand, the formed modified sand body is in a grain-pore structure. The solid substances can conglutinate the sand grains after the water is evaporated, and the solid substances can again be dissolved in the water to conglutinate the sand grains once the solid substances meet the water. The nutrient modified sand body can make the general sand body soil-like, and can fundamentally change the interaction relationship among the grains of the sand body, so the grain-pore structure with bonding force (cohesive force) is formed. During use of the sand body, the substances are hard to wash away because of the caking property and adhesion property thereof, so that the sand body has soil-like stability and moisture and the nutrient storing properties, can be directly added with the nutrients for plant growth, and is an ideal measure for desert control. At the same time, the modified sand body can be used as the means to utilize sand resources of sand beaches and sand lands for the plantation of plants.

The invention provides a laser etching aluminum alloy surface texturing method, and belongs to the technical field of aircraft aluminum alloy skin processing. The method includes the steps that a galvanometer in a laser processing device is adopted to control a laser scanning path; and different texturing surfaces are etched on the aircraft aluminum alloy skin surface, the scanning speed is 2000 mm/s, the frequency is 90 kHz, the pulse width is 0.35 microsecond, the number of scanning is one, the space is 0.3 mm, the spot diameter is 50 microns, and the power is 24 W. By changing the laser scanning path, the texturing structures are etched on the aluminum alloy surface, so that the surface roughness and the surface wetting performance of aluminum alloy skin are increased, and the adhesionforce of an aluminum alloy surface coating is increased.

The invention relates to a composite anti-fouling film, which is coated on the surface of a substrate material and comprises an inorganic oxide film and a fluorosilicone organic matter thin film, wherein the inorganic oxide film is coated onto the surface of the substrate material; the fluorosilicone organic matter thin film is coated onto inorganic oxide film; the inorganic oxide film is preparedfrom a nanometer silicon oxide and nanometer titanium oxide water solution and ethanol; the volume ratio of the nanometer silicon oxide and nanometer titanium oxide water solution to the ethanol is (1:4)-(1:9); the fluorosilicone organic matter thin film is prepared from fluorosilicone organic matter and HFE (hydrofluoroether); the fluorosilicone organic matter is a solution of a mixture comprising fluoroalkyl ether and active silyl groups, wherein the perfluoroalkyl ether is prepared from 40 to 50 percent of ethyl perfluorobutyl ether and 30 to 40 percent of ethyl nonafluorobutyl ether; therest is silyl group organic matters; the volume ratio of the fluorosilicone organic matter to the HFE is (1:500)-(1:1000).

The invention discloses modified sandy soil. The modified sandy soil is formed by stirring and mixing a solution having a caking property and adhesivity and sand soil, wherein the solution is formed by dissolving water-soluble solid organic matters in water. After the water is evaporated, the water-soluble solid organic matters can conglutinate grains of the sand soil, and when the solid organic matters meet the water, the solid organic matters can again dissolve in the water to form the solution having the caking property and adhesivity so as to conglutinate the grains of the sand soil. The modified sand soil can make general sand soil soil-like, interaction relationship among the grains of the sand soil can be fundamentally changed, and a grain-pore structure having bonding force (cohesive force) is formed. In the course of use of the modified sand soil, matters are hard to lose due to the characteristics of the caking property and adhesivity. The modified sand soil has soil-like stability and the water and nutrient storing properties, can provide solid conditions for plant growth, and is an ideal control measure for the sand soil. At the same time, the modified sand soil can be used as a means of utilization of sand resources such as sand beaches and the like for plant plantation.

The invention discloses a method for treating desert by plant type modified sand bodies. The method comprises the following step of: paving the plant type modified sand bodies on the surface of a desert to be treated, wherein the modified sand bodies are formed by dissolving the water-soluble solid state organic substances into water to form a solution with a caking property and the adhesivity, and stirring with plant seeds and sands. After the moisture is evaporated, water-soluble solid-state organic substances can be glued with sands and can be dissolved into the water again after meeting with the water to form the solution with the caking property and the adhesivity to glue the sands. According to the method disclosed by the invention, the common sand bodies can be formed into 'soil', so that the interaction relationship among the sand body particles can be basically changed to form a particle pore structure with binding force (cohesive force); the substances are hard to lose due to the characteristics of the substances such as the caking property and the adhesivity. The sand bodies have the same stability and the same moisture and nutrient storing performance like the soil, the plants can be directly grown after the plant seeds are mixed, and the strong condition can be provided for the growth of the plants, so that the method can be used as an ideal desert treating measure.