635results about How to "Recyclable" patented technology

The invention belongs to the technical field of materials and discloses a flexible low-smoke halogen-free flame-retardant wire and cable material and a preparation method thereof. The wire and cable material is prepared by using the following raw materials in parts by weight: 100 parts of ethylene-vinyl acetate copolymer, 1 to 70 parts of polyethylene, 30 to 100 parts of flame retardant, 5 to 20 parts of smoke suppressor, 0.1 to 5 parts of coupling agent, 1 to 20 parts of plasticizer, 0.1 to 10 parts of crosslinking agent, 3 to 15 parts of lubricant and 0.1 to 1 part of antioxidant. The wire and cable material disclosed by the invention is a thermoplastic sulfurized elastomer material, can be used for preparing insulating layers and sheath layers of wires and cables, and has the characteristics that no halogen is contained, the flame-retardant effect is good, the smoking amount is low, the surfaces of the insulating layers and sheath layers are smooth and do not stick with one another, the flexibility is good, the mechanical strength is high, the wear resistance is good, the processing fluidity is good, the process is simple and the material can be recycled.

An apparatus for treating a surface of a steal plate, sequentially comprising: a strip steel surface treatment unit (1) provided with a high-pressure ejection device (1-1) or a centrifugal throwing device (1-2), a strip steel surface cleaning unit (2), and a strip steel surface drying unit (3), one or both of the high-pressure ejection device and the centrifugal throwing device being arranged, and slurry, namely a mixture of solid abrasive and water, being sprayed onto the surface of the strip steel; and further comprising a slurry supply unit (4) and an abrasive filtering and recovery unit (5). Also disclosed is a method for treating a surface of a steal plate. In the treatment method, by spraying the solid mixed abrasive onto the surface of the strip steel, the surface roughness of the strip steel is controlled, and further, the oil, iron oxide scales and some dirty things on the surface of the strip steel can be cleared, thereby fully or partially replacing the smoothing process function.

The invention discloses a construction method of a shallow-buried subsurface-excavated cross-shaped cross-strut tunnel. The method includes the following steps of conducting construction preparation, conducting measurement and pay-off on a tunnel advanced support and the tunnel contour line according to construction design requirements, conducting advanced geological forecasting through the geophysical prospecting advanced geological forecasting and drilling advanced geological forecasting combined mode, conducting advanced pipe shed grouting and advanced curtain grouting, checking the grouting effect, entering the next procedure if the grouting effect meets the construction requirement, conducting advanced pipe shed and advanced curtain grouting again if the grouting effect does not meet the construction requirement, conducting excavation support construction on construction areas on by one from top to bottom and from left to right, conducting primary support and temporary support sealing and conducting monitoring and measuring after the primary tunnel transverse end face construction is completed, repeatedly executing the steps for the next circulation of construction if the design requirement is met, conducting support strengthening if the design requirement is not met, and regulating excavation parameters to conduct excavation support construction again till the design requirement is met.

The invention belongs to the technical field of preparation of aerogel having a water treatment function, in particular relates to a preparation method of graphene oxide and polyvinyl alcohol hybrid aerogel. The preparation method comprises the following five processing steps: preparing a graphene oxide dispersing solution; preparing a graphene oxide/chitosan mixed solution; preparing a self-foaming solution; preparing a gel solution; preparing graphene oxide/chitosan and polyvinyl alcohol hybrid aerogel. The preparation method is characterized in that the graphene oxide and polyvinyl alcohol hybrid aerogel is prepared by fully mixing the graphene oxide dispersing solution with distilled water, glacial acetic acid and chitosan powder and then adding polyvinyl alcohol, a filling agent, a cross-linking agent, a foaming agent and a catalyst in the mixture. The graphene oxide and polyvinyl alcohol hybrid aerogel prepared by the invention is strong in water absorbing capacity, high in hydrophily and quick in adsorption rate and can be reused after regeneration and can be used for industrial wastewater treatment. The preparation method of the graphene oxide and polyvinyl alcohol hybrid aerogel, disclosed by the invention, has the advantages that the principle is simple, the operation is easy, processing equipment is simple, the cost of raw materials is low, and the preparation method is beneficial for industrialization.

A drag reduction superhydrophobic coating and a preparation method thereof belong to the technical field of functional nanometer material application. A base of the drag reduction superhydrophobic coating adopts electroless metal deposition technique, a precious metal micro-nanometer binary grading composite structure is constructed on the base and decorated by a low surface energy material, a water static contact angle of the coating is larger than 150 degrees, and a rolling angle is smaller than 5 degrees. The drag reduction superhydrophobic coating is used for a model with motive power by itself, running speed of the model is obviously increased, and drag reduction rate is as high as 20%. The drag reduction superhydrophobic coating has good corrosivity resistance and can resist corrosion of strong acid and strong base solutions. The drag reduction superhydrophobic coating has repairability, and the preparation method can enable hydrophobicity of damaged areas to be rapidly recovered in a short period. The preparation method of the drag reduction superhydrophobic coating is simple, short in preparation period, and high in drag reduction rate.

The invention relates to a tubular product formed by winding thermoplastic fiber and a forming process thereof. The forming process includes extruding thermoplastic resin by an extruder and impregnating with continuous reinforced fiber to obtain a pre-impregnation sheet material, or compounding the reinforced fiber and thermoplastic fiber to obtain compound fiber yarn; subjecting the pre-impregnation material to unwinding, preheating and melting steps to remelt the pre-impregnation material and wind onto a core mould; and finally rolling, cooling to cure and demoulding. Compared with the prior art, the wound product has good adhesiveness and the product has advantages of high toughness, impact resistance, water-pressure resistance, capability of being recoverable, light weight, and the like. In addition, the process can optimize the working environment of employees.

The invention relates to the technical field of thermoplastic elastomer materials and particularly relates to a high-shock-absorbance wear-resistant thermoplastic elastomer and a preparation method thereof. The high-shock-absorbance wear-resistant thermoplastic elastomer comprises the following components in parts by weight: 40-60 parts of SIS resin, 10-20 parts of thermoplastic polyurethane, 5-10 parts of a compatilizer, 5-15 parts of extending oil, 5-10 parts of mineral filler, 1-3 parts of a processing aid and 0.2-0.5 part of an antioxidant. The preparation method comprises the following steps of firstly, placing the SIS resin, carbonate calcium, the antioxidant, the processing aid and extending oil into a high-speed mixer, mixing, adding other raw materials and mixing to obtain a premix; and secondly, placing the premix into a twin-screw extruder, extruding and granulating. The thermoplastic elastomer has the characteristics of capability of secondary injection molding, good adhesion with PC and ABS materials and high shock absorbance and wear resistance.

Synthesis of tributyl citrate with carbylic sulfoacid catalyst is carried out by taking carbylic sulfoacid as catalyst while ester synthesizing, filtering, decompress distilling the filtrate to obtain tributyl citrate and circulation using the filtered carbylic sulfoacid. It is cheap, short reactive time and gentle reactive condition, has more yield and higher activity.

The invention provides a method for preparing a gelatin/nano-silver/chitosan derivative composite film. The composite film is prepared by the following steps: by taking gelatin as a main raw material, heating to raise the temperature for dissolving gelatin particles, preparing gelatin/nano-silver sol through an in-situ reduction method, and preparing a gelatin/nano-silver film by adopting a self-assembling method in the solution; assembling a chitosan derivative macromolecule on the surface of the gelatin/nano-silver film by further adopting an electrostatic self-assembling method, and thus preparing the gelatin/nano-silver/chitosan derivative antibacterial composite film. The composite film has high biocompatibility and high antibacterial and bactericidal performance and is environment-friendly. Moreover, because the main raw material is gelatin, the composite film is rich in source, low in price, and good in film-forming property and has wide application prospects in aspects such as human skin, medical antibiosis and hemostatic materials. Meanwhile, the composite film is simple in preparation process and low in equipment requirement.

The invention discloses a synthesis method of 2-phenyl-2-propanol and acetophenone through catalytic oxidation of cumene, the synthesis method includes that firstly, adding the cumene and a solid catalyst into a reactor, forming a suspension through ultrasonic processing, wherein the solid catalyst is nitrogen-doped carbon material, heating the obtained suspension to 40-100 DEG C, introducing oxygen for reaction at constant pressure; after the reaction is finished, separating the reaction mixture to obtain the solid catalyst and a liquid mixture which contains the 2-phenyl-2-propanol, the acetophenone and cumene hydrogen peroxide; and obtaining target products of the 2-phenyl-2-propanol and the acetophenone through separation and purification. The cumene is oxidized at the constant pressure to generate 2-phenyl-2-propanol and acetophenone, the nitrogen-doped carbon material is used as the heterogeneous reaction catalyst, the oxygen is used as oxidant, an operational process is simple, the nonmetal catalyst is free of corrosion, environment-friendly, low in price and capable of being used repeatedly, the conversion ratio of the cumene is relatively high, and the target products are good in selectivity.

The invention relates to thermoplastic fiber winding pipe equipment and applications thereof. The equipment comprises a rack, a trolley, a mandrel, an unwinding device, infrared heater preheating devices, a mandrel infrared heater, an infrared temperature measurement instrument, a tension meter, a pneumatic pressure roller, a horizontal rotating shaft and a guide roller. The applications of the thermoplastic fiber winding pipe equipment comprises the following steps: before pipe winding, preheating the mandrel by using the mandrel infrared heater in advance, then coating the mandrel with a demoulding polyester thin film, unwinding through the unwinding device, pulling a prepreg tape through the guide roller to sequentially pass through the infrared heater preheating device and the tension meter to the winding beginning end of the mandrel and fixing, then starting the infrared heater preheating device for preheating, starting winding program, carrying out tension adjustment, enabling the horizontal rotating shaft to rotate along with the running of the winding program under the control of a servo motor, and carrying out roller pressing on a pipe through the pneumatic pressure roller. Compared with the prior art, the product has the advantages of being higher in toughness, impact-resistant and the like.

The invention belongs to the field of pipes, relates to an enhanced drainage pipe and mainly relates to a superstrong-muting PE (polyethylene) core layer micro-foamed drainage pipe which is suitable for wastewater discharging, engineering transforming projects and home decoration of villa communities, high-rise residential communities, high-grade residential apartment communities and the like and industrial building fields like water discharging, sewage discharging, waste discharging and the like of industrial enterprises. The superstrong-muting PE composite drainage pipe is a multilayer composite body formed by a high-density polyethylene resin inner layer, a middle PE micro-foamed layer and a high-density polyethylene resin outer layer, the thickness ratio of the inner layer, the middle layer and the outer layer is 1:4:1, and the PE micro-foamed layer is composed of regenerated polyethylene resin powder, inorganic filler or organic filler, natural fibers, a cross-linking agent, a coupling agent, a lubricating agent, a foaming agent and an antioxidant. The superstrong-muting PE core layer micro-foamed drainage pipe has excellent denoising and muting performance, superstrong resistance to chemical corrosion and good impact resistance.

The invention provides a polyfunctional group oxime and a preparation method thereof, and novel dynamically-repairable polyurethane based on the oxime and a preparation method thereof, the oxime is ahighly reactive organic substance, the oxime and an isocyanate can be prepared into the polyurethane at room temperature without a catalyst. It is noteworthy that the oxime is usually obtained by reacting a carbonyl compound (an aldehyde or a ketone) with hydroxylamine under mild conditions, and the process is an atomically-economic, high-yield and simple reaction. The thermosetting oxime-based polyurethane is cut into small pieces, and the small pieces can be hot-pressed again for molding under the conditions of 90-120 DEG C and 1-100 MPa, and the obtained thermosetting polyurethane substantially restores original mechanical properties; the reaction for preparing the polyurethane can be carried out without the catalyst at the room temperature. The preparation method is simple, the preparation process has wide sources of raw materials and low production cost, and the method has a prospect of large-scale industrial production.

The invention discloses a method for the preparation of menthone. A palladium-ruthenium catalyst is used for heterogeneous catalysis under mild conditions, and isopulegol is used for the preparation of the menthone. The palladium-ruthenium catalyst can be used for efficiently catalyzing the isopulegol and making the isopulegol convert into menthone under the mild conditions.

The invention discloses a method for preparing a magnetic aerogel adsorption material by using a Pickering-high-internal-phase emulsion template method and belongs to the technical field of high molecular materials. According to the method, water is used as a continuous phase and an organic solvent is used as an organic dispersion phase; modified Fe3O4 magnetic particles are used as an emulsion stabilizer and a non-ionic surfactant is used as an emulsion auxiliary stabilizer; polymerizable functional monomers are grafted on natural macromolecular chitosan; in the presence of an initiator and a cross-linking agent, a polymerization reaction is carried out to prepare the aerogel adsorption material. The magnetic aerogel adsorption material prepared by the invention contains abundant pore channel structures and functional radicals; an adsorption speed and an adsorption capacity on heavy metal are effectively and remarkably improved; the magnetic aerogel adsorption material has very good magnetic separation and repeatable utilization performances and can be used for recycling and utilizing heavy metal and rare disperse ions in a water body and soil.

The invention discloses a water body intelligent acceleration and aeration apparatus used for city landscape river, a main case is connected to a floating pontoon through an elevating system, the elevating system is used for controlling the underwater work depth of the main case, the inlet pipe and outlet pipe are arranged at two sides of the main case, and the inlet pipe and the outlet pipe are communicated, a telescopic air inlet pipe arranged at top of the main case is communicated to atmosphere; a power part is arranged in the main case, an impeller is arranged on the power part; a solar cell panel is arranged at top of the floating pontoon, a cell box, an intelligent monitoring embark system capable of controlling an algae inhibiting agent and a blower are arranged in the floating pontoon; a side sprinkling port is arranged on the intelligent monitoring embark system; the solar cell panel absorbs solar energy and changes it into electric energy, the electric energy is stored in the cell box, the cell box provides power supply for the intelligent monitoring embark system and the blower; electric energy is transmitted to the power part for rotating the impeller with high speed. According to the invention, vertical flow velocity of water body at intermediate and lower layer is accelerated, aeration and oxygenation are realized, chemical water quality processing method is integrated, so that river water quality status can be improved.

The invention discloses a method for synthesizing an amine compound catalyzed by functionalized ionic liquid. According to the method, functionalized ionic liquid is used as a catalyst to catalyze N-alkylation of amine and alcohol to synthesize corresponding compound derivatives. Acid functionalized ionic liquid is used as the catalyst to synthesize a series of compounds of amine. The method has the following advantages: a catalytic system is a metal-free system; the usage amount of the catalyst is small, and the catalyst has high catalytic activity, good stability and low corrosivity; operation is simple, and reaction is mild; post-treatment is easy, and the catalyst can be cyclically used.