150results about How to "High cost of preparation" patented technology

The invention belongs to the technical field of sensor manufacturing and especially relates to a flexible strain sensor with a crack structure and a preparation method thereof. The invention provides a flexible strain sensor comprising a flexible substrate, a conducting coating which is coated on the flexible substrate and provided with a prefabricated crack structure, a pair of electrodes which are positioned at two ends of the conducting coating surface, and a protection layer which covers the conducting coating surface and is made from flexible polymer. By means of the flexible strain sensor provided by the invention, small strain changes can be accurately monitored; the preparation method is simple and low in cost; the flexible strain sensor has high sensitivity, good stability and long service life, and can be bended and twisted.

The invention discloses a preparation method of a superfine nanometer lithium iron phosphate electrode material, comprising the following steps of: firstly, taking an iron source compound and a phosphorus source compound as raw materials to obtain nanometer ferrous phosphate as a precursor; and secondly, using the ferrous phosphate and the lithium source compound to prepare the superfine nano lithium iron phosphate electrode material. The preparation method of ferrous phosphate, disclosed by the invention, has a simple production process; the obtained nanometer ferrous phosphate can be used for preparing the high-purity superfine nanometer lithium iron phosphate; and the ferrous valence state is not changed when the ferrous phosphate is used for preparing the lithium iron phosphate, thus, no carbon source compound or reducing agent needs to to be added to change the iron valence state, and then the carbon-coated lithium iron phosphate or non-carbon-coated lithium iron phosphate can be directly prepared. The nanometer lithium iron phosphate manufactured by the nanometer ferrous phosphate precursor has excellent performance, good discharge capacity and voltage platform performance under high capability and high multiplying power, and long cycle life.

A Mg—Gd—Y—Zn—Zr alloy with high strength and toughness, corrosion resistance and anti-flammability and a process for preparation thereof are disclosed. The components and the mass percentages thereof in the Mg—Gd—Y—Zn—Zr alloy are: 3.0%≤Gd≤9.0%, 1.0%≤Y≤6.0%, 0.5%≤Zn≤3.0%, 0.2%≤Zr≤1.5%, the balance being Mg and inevitable impurities. The process for preparation thereof comprises: adding pure Mg into a smelting furnace for heating, then introducing mixed gases of CO₂ and SF₆ into the furnace for protection; adding other raw materials in sequence when the pure Mg is completely melted; preparing an ingot; conducting a homogenization treatment on the ingot prior to extrusion; conducting an aging treatment on the extruded alloy. A wrought magnesium alloy having superior overall performances and good fracture toughness, corrosion resistance and anti-flammability, with a small amount of rare earth element is obtained by adjusting the proportion of the alloy elements and by conventional casting, extrusion and heat treatment processes. The cost of the alloy is reduced while the strength of the alloy is maintained.

The invention publishes a method for producing the TiO2/PVDF blending positive ion exchange membrane, which involves a method for producing high polymer organic membrane. This invention enhances the water affinity of PVDF positive ion exchange membrane, the mechanical strength and anti-pollution capacity. The positive ion exchange membrane includes FI ethane, polypropylene, crosslinking agent, titanium dioxide grain and organic solvent with activity groups. This invention is as follows: a. dissolving the FI ethane and polypropylene in the organic solvent; B. joining crosslinking agent; C. filtering insoluble substance; D. joining titanium dioxide grain; E, mixing the solution well-proportioned and deaeration; F, creating membrane on the glass plate; G, drying, and solidifying. The TiO2/PVDF blending positive ion exchange membrane does not only retains the fine characteristic of FI ethane exchange membrane, but also improves the membrane surface energy,and enhances the water affinity, and increases the ability to repel outside pollutant.

Disclosed herein is a wig comprising cap with nano-silver that exhibits antibacterial activity. The wig comprising cap with nano-silver of the current invention exhibits antibacterial and disinfecting effects on the hair and scalp of a wearer, by applying the net and lace each formed of fibers with nano-silver to the cap of the wig, and/or by applying nano-silver to the hair of the wig. Thus, when wearing the wig of the current invention, the scalp of the wearer may be kept healthy, and the occurrence of skin diseases due to bacteria maybe prevented.

A metal nano particle/carbon composite material is prepared from hydrocarbon compound and transition metal compound in a weight ratio of 1:(0.01-1) through proportional mixing, charring reaction at 400-550 deg.C in inert gas for 6 hr, and extracting by hot fusion. Said hydrocarbon compound may be paraffine, olefin, etc. Said transition metal compound may be cyclopentadienyl transition metal compound, carbonyl transition metal compound, etc. Its advantages are simple preparing process and high purity.

The invention discloses a samarium cobalt permanent magnetic material and a preparation method thereof. The samarium cobalt permanent magnetic material is prepared from the following chemical ingredients by mass percent: 24.5-26% of samarium, 52-56% of cobalt, 7.5-12% of iron, 6.5-8% of copper, and 2-4% of zirconium. The samarium cobalt permanent magnet disclosed by the invention has high coercivity and low temperature coefficient; the magnetic performance at the temperature of 400-450 DEG C is that the residual magnetism Br is 0.783-0.907 T; the intrinsic coercivity Hcj is 704-1092.5 kA/m; the maximal magnetic level (BH)max is 108.5-164 kJ/m<3>; the temperature coefficient alpha of the residual magnetism is -0.0368%/DEG C to -0.054%/DEG C; and the temperature coefficient beta of the intrinsic coercivity is -0.132%/DEG C to -0.198%/DEG C. Thus, the samarium cobalt permanent magnetic material is simple in process and low in manufacturing cost.

The invention provides a method for preparing a precursor of an active electrode material of a nano-lithium ion battery. The method comprises the following steps: adopting an organic solvent method to mix a lithium source compound with other metal source compounds in an organic solvent under the condition of adding carbon source compounds or not adding carbon source compounds; heating to react a mixture for a fixed time and then stopping the reaction; separating the organic solvent; and drying to obtain the precursor. The precursor is a nano-sized powder with even particle distribution. An electrode material obtained by roasting the nano-sized precursor has good performances of high capacity, high multiplying power and longer cycle life.

The invention relates to a macromolecule separation microporous membrane and a preparation method thereof, in particular to a preparation method of modified fiber powder / polymer mixed microporous membrane. The method provided by the invention includes the following steps: the surface of the fiber powder is cleaned and carved; the surface-carved fiber powders, polymer, various additives and solutions are combined to prepare membrane casting liquid, and then the membrane casting liquid is put onto a glass plate for membrane-shaving or spanning and then the liquid membrane is gelatinized into membrane in the coagulation bath process, and finally the membrane is dipped in membrane-dipping liquid and then is dried. The invention can prepare the polymer microporous membrane which has low cost, high strength and better capability through adding various fiber powders into the membrane preparation liquid and changing process conditions.

The invention relates to a combination switchable glass composite window and a preparation method thereof. The composite window and the preparation method thereof include a substrate, and a first outer ITO transparent conductive film layer, an electrochromic layer, an ion transport layer, an ion storage layer and a second outer ITO transparent conductive film layer which are sequentially arranged on the outer surface of the substrate, and further include an inner ITO transparent conductive film layer, a PDLC liquid crystal light-adjusting film and an ITO transparent conductive film which are sequentially arranged on the inner surface of the substrate, wherein ordinary glass, toughened glass, laminated glass, organic glass or a mixture thereof is selected and used for the substrate, tungsten oxide is selected and used for thin-film material of the electrochromic layer, a lithium ion thin film is selected and used for an ionic conductive layer, and nickel oxide thin film is selected and used for the ion storage layer. The composite window and the preparation method thereof have the advantages that a combination of the electrochromic layer and the PDLC liquid crystal light-adjusting film combines the advantages and disadvantages of both and further effects of intelligent light adjusting and light shielding can be achieved.

The invention relates to a seedling medium and a preparation method thereof, wherein the medium comprises the following components of raw materials: one or more of crop by-products, organic wastes, by-products generated in grass pulping process when preparing materials, and ammonia water. The method comprises the following steps: mixing one or more of the crop by-products, the organic wastes, theby-products of the grass pulping process when preparing the materials, and the ammonia water, and then fermenting to gain the medium, wherein nitrogenous condensate water generated when concentratingblack liquid generated in a neutral ammonium sulfite process is optimally selected as the ammonia water, and optimally, the condensate water with 0.05-0.55% of nitrogen content and at the temperatureof 25-70 DEG C is the best; and by-products generated in preparation department in the neutral ammonium sulfite process are optimally selected as the crop by-products. The method re-uses the waste and waste liquid which are generated in the neutral ammonium sulfite process to turn waste into wealth. The permeability and nutrient content of the medium are respectively superior to that of peat perlite, when the medium is used in the growth test of nursery stock of forest, the nursery stock has obvious grow, and the quantity of the root system can be increased by over 30 percent.

The invention discloses a high-quality harmless utilizing method of a hyperaccumulator. The high-quality harmless utilizing method comprises the following steps: smashing and drying the hyperaccumulator, and sieving through a sieve of which the density is 100 meshes; carbonizing at a carbonization temperature being 450 to 550 DEG C and in carbonization time being 25 to 35 minutes, thus obtaining acarbonized material; immersing the carbonized material by using an alkaline solution of which the mass percentage is 45 to 55 percent; drying at 90 to 120 DEG C for 10 to 15 hours after immersing for20 to 28 hours, thus obtaining an amorphous particulate carbon block; activating the amorphous particulate carbon block into an activated carbon coarse product under a nitrogen atmosphere, wherein the activating temperature is 750 to 850 DEG C, and the activation time is 25 to 35 minutes; drying for 10 to 15 hours, thus obtaining metal-containing activated carbon with a catalytic effect; grindingthe activated carbon, thus obtaining an activated product HA-AC; adding 5 to 15 percent of the activated carbon product HA-AC to biomass or other reaction raw materials; putting a swelled material ina supercritical reaction kettle, and carrying out sealing reaction at the reaction temperature being 380 to 600 DEG C and the reaction pressure being 22.1 to 30 MPa, thus obtaining a hydrogen-rich gas. The high-quality harmless utilizing method disclosed by the invention has the advantages that additional metal loading is not required, a complicated preparation technology and a longer preparationperiod are not required, heavy metal can be fully stabilized, and secondary pollution can be avoided.

The invention relates to a method for preparing a metal-stuffing carbon nanometer pipe; aromatic compound is adequately mixed with the transitional metal compound, and the mixture is undertaken the thermal condensation polymerization reaction and is extracted to get the metal-stuffed carbon nanometer pipe. The present invention has the advantages that the source of the raw materials is rich, the craftwork is simple, the preparation cost of the material is low, the purity is high, the selective range of the metal is wide, and the like, and the large-scale production is easy to be realized.

The invention relates to a method for lithium extraction through extraction-reverse extraction, separation and purification. The method comprises the following steps: (1) an extracting system containing a composite extracting agent is adopted to extract and separate lithium-contained solution under a condition of pH=10-13 to obtain a lithium-loaded organic phase; (2) the gas-liquid-liquid three-phase reverse extraction is performed on the lithium-loaded organic phase obtained in the step (1) to obtain lithium-loaded reverse extracting liquid; and (3) the reverse extracting liquid obtained in the step (2) is heated and separated to obtain a lithium product and separated mother liquor. The method realizes efficient separation of lithium from such impurity elements as Na, K and B by adoptingthe composite extracting agent, adopts the gas-liquid-liquid three-phase continuous reverse extraction to reach the reverse extracting rate of lithium is 90% above, the total yield is 83% or above andthe purity of the lithium product is 96% above, is high in treatment quantity, simple in process and equipment and low in investment, effectively utilizes industrial tail gas, and achieves energy conservation, environmental protection and continuous production.

The present invention relates to a cracking catalyst containing laminar clay. It is prepared by adopting the following steps: mixing the expandable clay modifying component, pseudo-thin hydrargillite and water, pulping for 0.1-10 hr. to obtaining a slurry liquor, ageing slurry liquor for 0.1-10 hr. at 50-85 deg.C, drying, forming, washing with water, ageing, finally drying and roasting so as to obtain said catalyst. The described modifying component can be selected from one or several kinds of hydroxyl polymers of silicon, aluminium, zirconium or titanium or one or several kinds of one or several substances containing the described hydroxyl polymer. Said catalyst has higher heavy oil conversion capacity.

The invention relates to a VDMOS and a preparation method thereof. Wherein the VDMOS comprises a base layer and a doping layer in a semiconductor substrate, a gate region on the doping layer; wherein the base layer comprises a drain electrode region at the two sides of the gate region, the doping layer comprise a conductive plug adapter which is located on the drain electrode region and penetrates through the doping layer, an isolated well at the two sides of the gate region and a source electrode region located in the isolated well. In the invention, highly costly buried drain electrode region and extension layer technology is not needed, so that manufacturing cost is lowered.

The invention relates to a multi-element compound reinforced weak-texture wrought magnesium alloy and a preparing method thereof. The wrought magnesium alloy comprises the following elementary components in content: 5.5%-6.5% of Zn, 1.0%-6.5% of Al, 0.1%-0.4% of Mn, 0.1%-0.4% of Sn, 0.1%-0.4% of Ca, 0.1%-0.4% of Cu, smaller than or equal to 0.15% of unavoidable impurities and the balance of Mg. Compared with the existing non-rare-earth wrought magnesium alloy, the material of the invention has the following advantages that the alloy has high strength and great elongation after conventional extrusion treatment; the alloy has weak macro-texture and great dynamic isotropy; the alloy preparing cost is low, and the preparing technology is simple; and the application range of the wrought magnesium alloy is further increased.

The invention belongs to the scientific field of carbon nano-materials and relates to an electrochemical method for preparing petroleum coke-based carbon quantum dots and doping nitrogen in a one-step manner. In the invention, petroleum coke, which has high carbon content, low ash and a developed graphite lamellar structure, is creatively selected as a carbon source, and through an electrochemical oxidizing method, a novel technical method of preparing the carbon quantum dots is developed. Through change on calcination temperature, types of electrolytes and current density, fluorescent performance of the carbon quantum dots can be regulated. By means of addition of a nitrogen-doping agent to the electrolyte, preparation of nitrogen-doped carbon quantum dots through the electrochemical method in one step is achieved, and for the first time, ethylenediamine is employed as the electrolytic nitrogen-doping agent. Meanwhile, for the first time, foam nickel is creatively employed instead of a conventional Pt electrode, so that the method greatly increases electrolytic efficiency and reduces preparation cost. The petroleum coke is easy to obtain and low in cost. The whole process is simple in operation process, is convenient to product the carbon quantum dots industrially in large scale. The carbon quantum dots have wide application prospects in the fields of photo-catalysis, bio-imaging, and detection of ions and macromolecules.

The invention discloses a preparation method for blending modification of an ultrafiltration membrane by using nano cellulose crystal, belonging to the field of preparation of membrane materials. Thepreparation method solves the problems that the nano material is expensive in the process of blending modification of ultrafiltration membrane by the existing nano material, and the material dispersibility is not good, the hydrophilicity is insufficient and the material is inclined to agglomerate in the preparation process. The preparation method firstly ultrasonically disperses the nanocellulosecrystals in an organic solvent, then adds the additive and the polymer film material, heats and stirs uniformly, and performs vacuum defoaming to obtain a casting liquid; the casting liquid is evenlyscraped onto the non-woven fabric, and the modified ultrafiltration membrane is obtained by undergoing a coagulation bath. The preparation method makes good use of the hydrophilicity and mechanical strength of the nanocellulose crystal, greatly improves the anti-pollution performance, the water flux and the mechanical strength of the ultrafiltration membrane, and prolongs the service life of the membrane. Simultaneously, the modified nano materials derive from a wealth of sources, and are cheap and easy to obtain, and have good dispersibility in the solvent, so that the ultrafiltration membrane is relatively low in cost and convenient for industrial production.