336results about How to "Efficient preparation process" patented technology

An oriented graphene/polymer composite system, and a preparation method and an application thereof are provided. The composite system includes an oriented network component at least including graphene and a substrate component compounded with the oriented network component, wherein at least a part of graphene is arranged according to set orientation; the composite system at least has a heat conductivity coefficient in the set direction higher than heat conductivity coefficients in other directions. The preparation method includes the steps: the oriented network component is subjected to orientation treatment, at least a part of graphene is arranged according to the set orientation, and thus an oriented network is formed; and the substrate component at least containing a polymer is taken to be compounded with the oriented network component, and thus the composite system is formed. The composite system has high heat conductivity and high electrical conductive characteristic, can efficiently transfer heat in a needed direction when in use, has the characteristics of being simple, high in efficiency and the like, is suitable for scale production, and has broad application prospects in high-efficiency heat conductivity and heat dissipation.

The invention discloses a preparation method of a spinel-type magnetic MFe2O4/graphene composite material. The preparation method utilizes a water-soluble metal M<2+> salt and a Fe<3+> salt as precursors and graphite oxide as a matrix and comprises the following steps of carrying out ultrasonic dispersion of graphite oxide in ethanol or water as a solvent to obtain a graphene oxide dispersion, adding a M<2+> salt and Fe<3+> salt-containing aqueous solution having a M<2+>/Fe<3+> mole ratio of 1: 2 into the graphene oxide dispersion, fully stirring to obtain a mixed solution, adjusting a pH value of the mixed solution to a value more than 10 by an alkali liquor, adding a reducing agent into the mixed solution, stirring at a temperature of 80 to 150 DEG C for a reaction lasting for 4 to 10 hours, after the reaction is finished, carrying out separation, washing, drying and grinding, and carrying out calcination of the grinded powder at a temperature of 300 DEG C in a nitrogen or argon atmosphere for 2 to 10 hours. Magnetic MFe2O4 nano particles of the spinel-type magnetic MFe2O4/graphene composite material have high loading capacity, stable structures, good uniformity, good dispersibility and strong adhesion with graphene. The spinel-type magnetic MFe2O4/graphene composite material can be widely used in the fields of magnetic targeting materials and other related function materials.

The invention relates to a method for preparing aqueous solution of single-layer grapheme oxide. The method is characterized by comprising the following steps of: 1, partially stripping the dried grapheme oxide in advance through microwave irradiation; and 2, adding the grapheme oxide which is partially stripped into deionized water and then adding a dispersing agent, stirring, performing oscillation or ultrasonic treatment to prepare the aqueous solution of single-layer grapheme oxide, wherein the microwave output power of the microwave irradiation is continuously adjustable and is 100 to 1,500 watts; the dispersing agent is KOH, NaOH, K2CO3, Na2CO3, NH4HCO3, (NH4)2CO3 or ammonia water; and the dispersing agent is prepared into 1 M of aqueous solution before use and the mass percentage of the ammonia water is 38 percent. The preparation method provided by the invention is low in energy consumption and is an environmentally-friendly and high-efficiency preparation method; the area of the grapheme oxide can be controlled; and the preparation time is less than 10 minutes.

The invention relates to a preparation method of a high-performance diamond reinforced Al-matrix electronic packaging composite material, belonging to the field of metal-matrix composite materials. The preparation method is characterized by comprising the following steps: adding alloy elements into a pure Al matrix to prepare elemental mixed powder or Al alloy powder; uniformly mixing the elemental mixed powder or the Al alloy powder and diamond single crystal grains according to the volume percentage ratio of 75:25-40:60; adding the mixture into a graphite mold for carrying out spark plasma sintering, wherein the mixture is added at the heating speed of 50-100 DEG C/min until the sintering temperature is 580-800 DEG C and the sintering pressure is 30-40MPa; keeping the temperature and the pressure for 5-20min; and obtaining the high-performance diamond reinforced Al-matrix electronic packaging composite material after the sintering process finishes. The alloy elements comprise B, Si, Cr, Ti, Nb, Ag, Cu and the like. The material of the invention has the characteristics that the heat conductivity reaches 430W/m.K, the heat expansion coefficient is 6.40ppm/K, the compressive strength is 331MPa, and the density is only 3.13g/cm<3>. The invention effectively solves the problem of graphitization of single crystal diamond grains in the preparation process of the material, and has simple preparation processes and high production efficiency.

The invention relates to a grapheme capacitive touch screen, wherein a transparent conductive film of the touch screen is formed by two layers of grapheme films with different pattern directions in an attachment mode. The grapheme capacitive touch screen achieves a multi-point touch function; remarkably reduces production cost of the touch screen; avoids damage caused by polyethylene terephthalate (PET) base material bending during processing; and eliminates the complex and high-cost yellow light manufacturing process, and is fast, convenient and efficient in the production process due to the fact that only laser direct writing etching or metal mask and reactive ion etching is adopted in the forming process of sensing electrode patterns in a window touch area.

The invention discloses an oil water separation nanofiber membrane with CO2 stimulus response as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) mixing a random copolymer and a solvent to obtain spinning solution, wherein the random copolymer is polymethyl methacrylate-2-Diethylaminoethyl Methacrylate; (2) performing electrostatic spinning on the spinning solution to obtain nanofibers, and interweaving and arranging the nanofibers to obtain the nanofiber membrane. The oil water separation nanofiber membrane is applied to oil water separation. The nanofiber membrane prepared by utilizing an electrostatic spinning technology has a CO2 stimulus response function, can selectively perform oil water separation, is low in cost, simple and convenient to operate, clean and environment-friendly, and has better separation effects for various oil-water mixed systems.

The invention discloses a preparation method of flexible metal photonic crystal and belongs to the technical field of nano photonic materials and devices. The method comprises the steps of preparing a photoresist nano grating structure on a buffer layer of a buffer layer substrate, dissolving and spin-coating gold nanoparticle colloid on the surface of grating and limiting the coating gold nanoparticle colloid in a groove of the grating, performing heating processing, so as to ensure that organic ligand on gold surface is sublimed and gold nanoparticle is fused, so as to form metal photonic crystal, coating flexible substrate liquid mixed with curing agent on the metal photonic crystal, covering another buffer layer substrate, heating the metal photonic crystal to perform cross-linking polymerization, putting the metal photonic crystal into a hydrochloric acid solution or a sulfuric acid solution, so as to sufficiently dissolve the buffer layer, and cleaning obtained samples through distilled water. The method has important direct application value for developing stress and deformation sensors and novel flexible optoelectronic devices.

The invention relates to a nano-composite air electrode catalyst for a zinc-air battery and a preparation method of the nano-composite catalyst, belonging to the technical field of zinc-air batteries. The nano-composite catalyst is composed of manganese dioxide, nano-silver, a carbon nano tube and a carbon material in the mass ratio of (0-0.5) to (0-0.5) to 1 to (1.75-2.75), wherein the mass of manganese dioxide and the mass of nano-silver cannot be zero at the same time. Due to the addition of nanometer materials such as nano-silver and the carbon nano tube, the wettability of the nano-composite catalyst is improved, and the reduction reaction of oxygen in a three-phase boundary formed by electrolyte, catalyst material and oxygen is facilitated; meanwhile, the composite catalyst formed by manganese dioxide and nano-silver has oxygen reduction effect higher than that of a single catalyst. The nano-composite catalyst adopts the preparation technology comprising the steps of pretreatment, granulation, ultrasonic dispersion and ball-milling treatment, the operation is simple and efficient, and the application prospect is good.

The invention provides a film-forming solution. The film-forming solution is characterized by comprising the following components: 5-30wt% of alcohol-soluble protein, 1-5wt% of nano TiO2 particles, 0.1-3wt% of gelatinizing agent, 0.05-3wt% of coagulant aid, 0.1-3wt% of plasticizer, and the balance of ethanol water of which the volume ratio is 45-65%. The invention also provides a method for preparing the film-forming solution. Furthermore, the invention also provides application of the film-forming solution as a food preservation film. According to the film-forming solution provided by the invention, not only are the edibility, the safety and the stability of the preservation film improved due to the alcohol-soluble protein, but also the preservation film is degradable and free of pollution to the environment. The nano TiO2 particles are contained, so that the film-forming solution has unique barrier property and mechanical property after a film is formed, and has an antibacterial effect. In addition, the preparation method of the film-forming solution provided by the invention is simple in process, and low in cost. The preservation film not only is good in moisture resistance, but also does not become tacky after being moistened, is degradable, green and environment-friendly, can well keep the quality of the food, and prolongs the shelf life after being formed on the food surface.

The invention belongs to the field of a nano functional material and a new energy source, and relates to a preparation method for an anode material of a red phosphorous cladding carbon nano tube composite ion battery. The preparation method comprises the following steps of: mixing pretreated red phosphorous powder and a carbon nano tube according to a certain quality proportion; preparing to a uniform serous liquid with an appropriate amount of a grinding agent and transferring the uniform serous liquid to a ball grinding tank; carrying out anaerobic wet high-energy ball grinding, and thereby obtaining the anode material of the red phosphate cladding carbon nano tube ion battery, wherein effective ball grinding time is 2 to 6 hours. The core of the invention is that the simple and high-efficiency anaerobic wet high-energy ball grinding is adopted to further prepare the anode material of the red phosphate cladding carbon nano tube ion battery; red phosphate is uniformly coated on the surface of the carbon nano tube, a particular conductive network in the composite material is built by means of the carbon nano tube, the contact area of the red phosphate and the carbon nano tube is increased, and thus, the anode material of the composite ion battery has the advantages of high specific capacity, high rate performance and stable circularity; and moreover, the process is simple, the preparation quantity is large, and industrial production is easy to achieve.

The invention discloses a composite particle with multiple core-shell structures. The composite particle uses inorganic silica nanoparticles as a core, uses an organic acrylate polymer as a middle layer, and uses a carbon nanotube adsorption layer as a shell. The invention also discloses a preparation method for the composite particle, first nano-silica is synthesized through a Stober method, thenthe surface of nano-silica is coated with an acrylate polymer layer based on a dispersion polymerization method, and an initiator that can be subjected to hydrolytic ionization is used to achieve coating of the nano silica surface with the polymer and charge modification in one step, then further carbon nanotubes are adsorbed through electrostatic self-assembly. The invention provides the composite particle with multiple core-shell structures and the preparation method thereof, the preparation process is green and efficient, and does not need complicated functional modification, and the prepared composite particle has excellent overall performance.

The invention provides an epoxy modified polyphenylene ether resin, the epoxy modified polyphenylene ether resin possesses a structural unit shown in a formula (I), and a preparation method comprises the following steps 100 parts of solid polyphenylene ether resin adds a polymerization reaction solvent for dissolving into a liquid polyphenylene ether resin solution, and then 5-60 parts of epoxy resin and 0.001-5 parts of a catalyst are added in the solution, stirred and mixed at the temperature of 80-140 DEG C for 1- 3 hours to obtain a pre-polymerization solution. The invention also discloses a resin composition containing the epoxy modified polyphenylene ethesr resin, and an application in preparation of printed circuit board. The epoxy modified polyphenylene ether resin composition has the advantages of excellent glass fiber cloth impregnation, simple preparation process, high efficiency, environmental protection and high product purity controllability; can be used for making a laminated material and a copper clad pressure plate, possess excellent heat resistance and dielectric properties, and is in favor of signal transmission of high frequency circuit board.

The invention provides a preparation method and application of a low-molecular porphyra haitanensis polyferose compound. The method is characterized in that low-molecular porphyran is used as a raw material and degraded by redox reaction to obtain low-molecular-weight porphyran with the molecular weight being less than 10000Da; and the polyferose compound synthesized by heating the porphyran and ferric chloride together can be dissolved well and exist stably under a physiological pH condition, and also shows a good effect in the iron-deficiency anemia mouse model experiment. The preparation method has the advantages of being simple and convenient in operation, stable in preparation process, low in preparation cost, etc.; and the preparation method also shows wide applicability to raw materials, namely, any polysaccharide with a proper molecular weight range is applicable to the preparation method.

The invention provides a compound omeprazole capsule, a preparation method and a detection method thereof. The capsule is prepared from the following components in accordance with parts by weight: 200 parts of omeprazole, 1100 parts of sodium bicarbonate and a right amount of magnesium stearate and talcum powder or 40 parts of omeprazole, 1100 parts of sodium bicarbonate and a right amount of magnesium stearate and talcum powder. According to the compound omeprazole capsule, the preparation method and the detection method aiming at the defects of the prior art, the preparation process of the compound omeprazole capsule is optimized, so that the compound omeprazole capsule has obvious curative effects on treating diseases such as peptic ulcers, gastroesophageal reflux diseases and the like which are caused by hyperchlorhydria, and a systemic, integral and effective component identification and content determination method is established, so that the quality of the compound omeprazole capsule can be effectively controlled, thereby guaranteeing the clinic curative effects of the compound omeprazole capsule.

The invention discloses a microalloyed magnesium alloy sheet with high formability and a preparation method thereof, and belongs to the nonferrous metal material and machining field, which solves theproblem of poor room temperature plasticity existing in magnesium alloy sheets. The microalloyed magnesium alloy sheet with high formability comprises, by mass percent, 0.5-1.0% of zinc, 0.3-0.6% of ytterbium, 0.2-0.4% of zirconium, and the balance magnesium and inevitable impurity elements. A weak base surface texture is showed through the sheet formed by synchronous cross rolling, the elongations in the rolling direction, 45-degree rolling direction and transverse direction are about 30%, the erishen value is 8.11 mm, and the room temperature formability is good. The key preparative techniques comprise smelting, casting, rolling and annealing, and has the advantages of being efficient, rapid, low in cost, high in operability, good in process stability, capable of realizing batch production easily, energy-saving and environment-friendly.

The invention discloses a preparation method of a titanium-niobium-zirconium-based hydroxyapatite biological composite material and belongs to the field of biomaterial preparation. The composite material of the invention employs titanium-niobium-zirconium alloy as a matrix, and hydroxyapatite as a bio-ceramic; and the weight of hydroxyapatite is 10-25% of that of the titanium alloy. The preparation process is as follows: filling a hydroxyapatite powder and a titanium alloy powder into a mill pot, sealing by alcohol, vacuumizing to 20-30Pa, milling for 6-8 h and drying in a vacuum oven; filling the dry powder into a graphite mold for cold forming; and finally carrying out spark plasma sintering with the sintering temperature at 1100 DEG C-1200 DEG C, first heating to 1000 DEG C by heating rate of in 100 DEG C / min, then heating to the sintering temperature by 25-50 DEG C / min and insulating for 6-10min with the pressure of 50-60MPa. The prepared biological composite material has elastic modulus of 25.4-45GPa, and has good mechanical properties and biocompatibility. The method of the invention is simple in process and low in production cost.

The invention relates to a green and environment-friendly fertility fertilizer capable of thoroughly improving soil, activating and repairing soil, protecting soil from fertilizer damage, completely restoring the soil, resisting fertilizer damage and preventing pollution, enduringly and strongly activating soil, completely getting rid of soil hardening, enriching vegan nutrition and continuously increasing both production and income. By adopting the methods of conditioning of soil and physiological regulation of crops, synthesis of biological nutrition and recombination of (mother) nutrient components, inorganic and organic combination and the addition of (sub-element) microelement supplements, the green and environment-friendly fertility fertilizer is scientific, targeted and flexible and makes up for the shortcomings that the modern fertilizer has nutrient deficiency or excess easily caused by the fixed ratio of nutrients. The green and environment-friendly fertility fertilizer has the advantages that nitrogen is supplemented if nitrogen is deficient, phosphorus is supplemented if phosphorus is deficient, potassium is supplemented if potassium is deficient, elements are supplemented if elements are deficient, the fertilizer damage is effectively inhibited, the properties of soil are improved, the fertility of soil is improved, the deterioration of soil and environmental pollution are avoided, and thus the green and environment-friendly fertility fertilizer is named as'fertility fertilizer and fertilizer in fertilizer' and is extremely perfect.