42results about How to "The preparation process is non-toxic" patented technology

The invention relates to an inorganic high temperature protection coating technology, particularly to a high-temperature oxidation resistant and corrosion resistant glass ceramic composite coating which can be used for components made of titanium alloy and other metallic materials and a preparation technology of the composite coating. The coating is formed through uniformly dispersing and distributing micron scale ceramic particle phase and nanoscale metal/oxide mixed powder into a glass matrix phase, the glass matrix phase is formed through performing high temperature conversion on sodium silicate water glass or potassium silicate water glass, the micron phase ceramic particle phase accounts for 15-60 wt% of the glass ceramic composite coating, and the nanoscale metal/oxide mixed powder accounts for 0.5-5 wt% of the glass ceramic composite coating. The coating preparation technology comprises the steps of coating material preparation, coating material spraying and high temperature processing. The glass ceramic composite coating, provided by the invention, is compact, has no holes, has higher strength and breaking tenacity, and has good binding force with a titanium alloy matrix and thermal expansion coefficient matched with the titanium alloy matrix, thereby having excellent anti-thermocycling thermal shock performance, high-temperature oxidation resistance and corrosion resistance.

The invention discloses a plant essential oil chitosan nano microcapsule. The plant essential oil chitosan nano microcapsule comprises a wall material and a core material, wherein the wall material isprepared from chitosan and a cross-linking agent in an acetic acid water solution or an ionic liquid water solution through cross linking; the core material is prepared from plant essential oil and mannose erythritol ester. The plant essential oil chitosan nano microcapsule disclosed by the invention has better encapsulation efficiency and better particle diameter, the destruction to active components of essential oil can be reduced, the volatility of the essential oil is effectively reduced, the photo-thermal stability of the essential oil is increased, and the effect acting time of the essential oil is prolonged; liquid essential oil is stored in a solid form while the essential oil is not destroyed; a preparation process is safe, non-toxic and green; the application range of the plantessential oil is greatly expanded.

The invention discloses POSS modified rosin nonisocyanate polyurethane and a preparation method of the nonisocyanate polyurethane. According to the method, epoxy group POSS and CO2 react under the action of a catalyst to synthesize cyclic carbonate-based POSS, then the cyclic carbonate-based POSS is copolymerized with rosin-based cyclic carbonate and an amino compound, and the POSS modified nonisocyanate polyurethane is prepared. The method for preparing the cyclic carbonate-based POSS is simple and convenient, and reaction conditions are mild; the prepared polyurethane material has a good thermodynamic property, no isocyanate with hypertoxicity is adopted in the preparation process, and the preparation process is safe and environmentally friendly.

The invention relates to a 2D Ti3C2-MXene thin film material, a preparation method thereof and application of the material in an RRAM, and belongs to the technical fields of film preparation and microelectronic functional devices. An MXene film is prepared in the surface of a conductive substrate in a low-temperature one-step solution method, film formation is easy, and the film can be prepared ina large area more easily. The novel 2D material MXene is applied to the memory field instead of a traditional resistive switching material for the first time, the RRAM comprises a hard substrate, a bottom electrode, a resistive switching layer and a top electrode successively from bottom to top, the resistive switching layer is made of the 2D Ti3C2-MXene thin film material and in the thickness of100-450nm, a prepared device, as a nonvolatile memory, can keep the original resistive state when being powered off, and the device is kept stable after multiple continuous cycles, and is resistant to circulation.

The invention discloses a calcium carbonate and aluminum magnesium composite flame-retardant paper, and a preparation method thereof. The invention aims at solving the problems of low flame-retarding effect, poor corrosion resistance, high preparation cost, and environment pollution of prior arts. The invention adopts the following realization scheme: a 1.62-7.02mol/L hydroxide ion suspension liquid is added into a prepared mixed liquid of a 0.42-1.82mol/L magnesium ion solution, a 0.18-0.78mol/L aluminum ion solution and a 0.24-1.04mol/L sodium carbonate suspension liquid; heating and stirring, precipitation and washing are sequentially carried out, such that calcium carbonate and aluminum magnesium nano-grade multiphase precipitate is obtained; waste shredded paper is added into the multiphase precipitate; heating and stirring are carried out, such that flame-retardant paper pulp is obtained; and water removing and air-drying are carried out, such that the calcium carbonate and aluminum magnesium composite flame-retardant paper is obtained. The flame-retardant paper has the advantages of good flame-retarding effect, no corrosion, no pollution and low preparation cost. The flame-retardant paper can be used in the construction industry of large office occasion indoor decoration, packaging, and fire prevention.

The invention relates to the field of inorganic protection coatings, and particularly provides an enamel coating with the function of resisting sulfuric acid and hydrochloric acid dew point corrosionand a preparation technology thereof. The enamel coating can serve as Q235 steel, BTC1 steel, 304 stainless steel and other metal material parts. Micron oxide particles are uniformly dispersed and distributed in an enamel glaze substrate parent phase, wherein enamel glaze is formed by mixing and melting the analytical pure raw materials (such as: silicon dioxide, aluminum sesquioxide, diboron trioxide, sodium oxide, potassium oxide, nickel oxide, cobalt oxide and calcium fluoride) at the high temperature and water quenching, and the micron oxide particles are one or arbitrary combination of analytical pure aluminum sesquioxide, silicon dioxide, titanium dioxide and zirconium dioxide. The enamel coating is prepared from the raw materials which can be purchased in the market directly, and the preparation technology is free of toxicity and pollution in the process, and conforms to the energy-saving and environment-friendly development trend. The enamel coating is compact and free of pores, has higher strength, fracture toughness, good binding force with a steel substrate and a matched coefficient of thermal expansion.

The invention discloses a high-orientation layered graphene aerogel phase change composite material and a preparation method thereof, and belongs to the field of phase change energy storage. The preparation method specifically comprises the steps of carrying out hydrothermal reaction on graphene oxide suspension in a segmented heating manner to obtain reduced graphene hydrogel; performing pre-freezing treatment; performing vacuum freeze drying to obtain a layered aerogel material; performing high-temperature carbonization or graphitization treatment; and compounding with a phase change material through vacuum impregnation. The graphene aerogel prepared by the method disclosed by the invention can be repeatedly rebounded and is not easy to break; and the highly-oriented layered graphene aerogel phase-change composite material prepared by the method has excellent oriented heat-conducting property, high energy storage property and good leakproof property, and has a wide application prospect in the field of phase-change energy storage.

The invention relates to preparation and application of a dual functional solid cocatalyst which can resist pollution of vanadium and nickel in the process of cracking and converting heavy oils. The solid cocatalyst is characterized by being prepared from the following components in percentage by weight: 10 to 50 percent of high-activity lanthanum oxide, 0.1 to 20 percent of fine-grained antimonyoxide, 1 to 30 percent of high-activity Y molecular sieves of which the outer surfaces are modified with rare earth, and the balance of aluminum oxide-based binder which consists of acidified pseudoboehmite and/or alumina sol, wherein the high-activity lanthanum oxide is formed through gradual decomposition of the lanthanum carbonate which is directly added under the action of high temperature inpreparation and using processes; and the fine-grained antimony oxide is prepared from antimony trioxide and/or pentavalent colloidal antimony oxide which are/is directly added and have/has the average diameter of less than 1 micron. After the solid composition slurry is homogeneously ground, the slurry is subjected to spray drying to form a microspheric solid cocatalyst which comprises uniformly distributed heavy metal pollution-resisting active components with multiple apertures, and a cracking activity center to which macromolecules can get close. When the dual functional solid cocatalyst is used in the cracking and conversion process of catalytic cracking/pyrolysis of the heavy oil, toxication of the vanadium and the nickel in heavy fed stock on a catalyst in a system can be reduced, the distribution of a reaction product can be improved simultaneously, and the conversion efficiency of a heavy fed material and the yield of light hydrocarbon in the product are effectively improved.

The invention discloses a preparation method of modified graphene and application of the modified graphene to positive materials for lithium batteries. The preparation method for the modified graphene comprises the following steps: preparing a graphene oxide slurry; reducing the graphene oxide slurry at high temperature to prepare graphene; modifying the graphene by a graphene oxidant; modifying the graphene by quaternary ammonium salt; doping the modified graphene into the positive materials for the lithium batteries. The modified graphene prepared by the method has the advantages that the modified graphene is free of agglomeration, excellent in dispersion in solvents, free of toxicity in preparation process, free of pollution to environment and long in service life; through the application of the modified graphene to the positive materials for the lithium batteries, the electric capacity and the charge-discharge rate of the batteries are improved obviously; a small amount of modified graphene is added, so that the cost is reduced.

The invention discloses an antistatic textile fabric and a preparation process thereof. The preparation process of the antistatic textile fabric comprises the following steps of I, pretreatment and II, blending. The preparation process is simple and non-toxic, the antistatic performance of the product can be effectively improved, static electricity is prevented from being generated in a dry environment, and the prepared antistatic textile fabric also has the functions of natural antibacterial property, deodorization, ultraviolet resistance and the like, and is widely applicable to the fields of manufacturing clothes, household textiles and the like.

The invention discloses a preparation method of a tin-zinc composite oxide material with an even size and a micro-nano structure, comprising the following steps of: evenly mixing tin salt and zinc salt, wherein the molar ratio of the tin salt to zinc salt is 0-1; then mixing the tin salt and the zinc salt with alkali, wherein the molar ratio of the total amount of the tin salt and the zinc salt to the alkali is 1:2-10; putting the mixture into an agate mortar or a planet agate jar and milling for 1-30 hours; carrying out filter cleaning or ultrasonic cleaning for 2-5 times after the mixture is taken out; then drying for 2-10 hours in a drying oven at the temperature of 60-100 DEG C; putting dried products in a muffle furnace for calcining 1-10 hours, wherein the calcining temperature is 300-900 DEG C; and cooling to obtain the composite oxide material. The method has the advantages of simple required process equipment, convenient operation, easy industrial production, no toxin or pollution in the procedure of the preparation process and the like, and belongs to a green synthesis method.

The invention discloses an amino-functionalized-polyolefin-elastomer-toughened super-tough nylon composite material and a production method thereof. A peroxy cross-linking agent and polar monomer arenot required in a production process of the composite material, thus side reaction of cross-linking, degradation and the like in a processing process are effectively avoided, the produced high-tenacity nylon composite material has good processing performance, and has good tensile strength and excellent tenacity at the same time, balance of rigidity and tenacity is achieved certainly, and application prospects of the nylon material are broadened. The high-tenacity nylon comprises the following components of 50-97 parts by weight of nylon resin, 2-50 parts by weight of amino-functionalized polyolefin elastomer and 0-0.8 parts by weight of antioxidant.

The invention relates to a preparation method of an antibacterial conductive polypropylene fiber yarn, and relates to the technical field of yarn production. According to the preparation method, a melt electrostatic spinning device serves as a generating device, the melt electrostatic spinning device comprises a melt spinning machine, an air spraying device and an electrostatic spinning machine, the air spraying device is arranged on the melt spinning machine, and the polypropylene fiber yarn prepared through melt spinning has certain thermal viscosity; the semi-molten polypropylene yarn can be directly combined with functional particles or functional powder. According to the polypropylene fiber yarn prepared through melt spinning, only polypropylene particles need to be fused and drawn into filaments at high temperature, compared with solution dry spinning and solution wet spinning, the technology is free of coagulating bath and solvent, the raw material cost and the production cost are greatly reduced, the preparation process is free of toxicity and pollution, and continuous preparation can be achieved.

The invention provides a porous organic silicon microsphere and a preparation method and application thereof. The porous organic silicon microsphere is prepared from a liquid organic silicon composition, a curing retarder, a catalyst, an emulsifier and water, and the emulsifier comprises a hydrophilic emulsifier and an oleophylic emulsifier; the porous organic silicon microsphere has the advantages of no toxicity, no odor, high porosity, large aperture and the like, has high light transmittance and haze, and can be applied to various fields. Meanwhile, the preparation method of the porous organic silicon microsphere is simple, the preparation process is non-toxic, safe and environment-friendly, and large-scale industrial production can be carried out.