37results about How to "Moderate conductivity" patented technology

The invention discloses a flame-proof electrolyte and its lithium battery for secondary lithium battery, which is characterized by the following: adopting one or more phosphosubester (such as methyl acid phosphate dimethyl ester, ethyl phosphate diethyl ester and its derivant) as pure solvent or solvent component; reducing the price of electrolyte with incombustibility, low toxicity and high conductivity; improving the combusting safety effectively.

The invention discloses a process for preparing graphite according to an electrochemical method. The process comprises the following steps: firstly, mixing lewis acid with protonic acid to obtain electrolyte; secondly, taking graphite paper as an anode, and completely immersing the graphite paper into the electrolyte for intercalating to obtain intercalated graphite paper with expanded volume; thirdly, using the intercalated graphite paper as an anode, immersing the intercalated graphite paper into a solution containing sulfate ions or phosphate anions, and applying voltage to enable the intercalated graphite paper to continuously expand, wherein the intercalated graphite paper gradually falls off to form expanded graphite paste; fourthly, repeatedly washing the graphite paste by using pure water, filtering, then uniformly mixing the graphite paste with the pure water to obtain dilute paste, and sequentially carrying out ultrasonic exfoliation, filtering and drying on the dilute paste to obtain graphene powder. According to the process disclosed by the invention, the problem that a strong acid, a strong oxidant or an expensive poisonous organic solvent is adopted for preparing graphene according to an existing electrochemical method is solved, a preparation process of the graphene is also simplified, and the preparation cost is reduced.

The invention provides a plating solution for the non-cyanide imitation gold plating of a Cu-Zn binary alloy on low carbon steel, and its use method in order to improve the problems of severe toxicity, bad anode dissolvability and high treatment cost of three wastes of cyanide-containing plating solutions and the problems of complex composition, narrow range of technological parameters and unrealistic imitation gold color of non-cyanide plating solutions in present imitation gold plating technologies. The method is characterized in that the method comprises the following steps: an activated matrix can be directly plated without cleaning, so the operation is simple; the imitation gold plating solution is composed of potassium pyrophosphate, copper sulfate, zinc sulfate and glycerin, so the imitation gold plating solution has the advantages of green property, environmental protection, good dispersity, strong homogeneous plating ability, simple composition and easy maintenance; and the prepared gold imitation plating solution can meet the requirements of the cross cut test requirements of national standard GB9286-1998 paint and varnish film; and the obtained coating is passivated and seal-protected, and the protected coating meets the 5% brine neutral salt spray test indexes of the national standard GB5938-86 Corrosion Resistance Test Method of Metal Coating and Chemical Treatment Layer of Light Industrial Product, and can be used as a decorative coating.

The invention provides a novel wire cut electrical discharge machining work fluid and a preparation method thereof. The wire cut work fluid is prepared from the following raw materials in percentage by weight: 48-58% of 20# engine oil, 16-18% of a compound emulsifier, 8-10% of a multifunctional additive, 6-8% of oleic acid, 1.5-2.5% of triethanolamine, 0.5-1.5% of sodium hydroxide and 10-12% of water. The preparation method comprises the following steps: a) preparing the multifunction additive; and b) heating, stirring and mixing the raw materials to prepare the work fluid. The invention discloses the novel wire cut electrical discharge machining work fluid and the preparation method thereof. The wire cut work fluid prepared by adopting a one-step method is simple and feasible and low in cost. The prepared work fluid has good anti-rust property, deforming property, cleaning property and lubricity, is moderate in electric conductivity and free of toxicity and odors and has relatively high application value.

The invention relates to a preparation method of an ibuprofen transdermal sustained-release preparation. According to the method, a biodegradable high-molecular material of polylactic acid is used asa shell layer material, a high-molecular material of polyvinylpyrrolidone is used as a core layer material, ibuprofen which is a medicament with strong crystallinity is loaded on the core layer of fiber by using a coaxial electrostatic spinning means, and the prepared ibuprofen transdermal sustained-release preparation has a core-shell structure. The invention utilizes the double-layer shielding function established by the special core-shell structure of the coaxial electrostatic spinning fiber to realize the inhibition of ibuprofen crystallization, and the coaxial electrostatic spinning fiberhas larger specific surface area, thereby improving the transdermal penetration effect and the drug treatment effect of the ibuprofen. The ibuprofen transdermal sustained-release preparation preparedby the method can flexibly adjust and control the drug loading ratio by adjusting the quality of the added drug, does not contain a penetration enhancer, can be directly applied to skin, has good usecomfort and drug sustained-release performance, and is beneficial to drug transdermal penetration and treatment.

The invention discloses a color ink-jet printing ink and a preparation method thereof. The color ink-jet printing ink comprises the following components in parts by weight: 60-80 parts of deionized water, 8-12 parts of triethanolamine, 5-10 parts of a water-soluble organic wetting agent, 6-8 parts of a wetting binder, 6-8 parts of a cellosolve, 5-7 parts of acrylic resin, 4-6 parts of a colorant, 0.2-0.4 part of a surfactant, 0.1-0.2 part of a preservative and 0.01-0.02 part of a drying agent, wherein the colorant is metal complex dye; the drying agent is selected from ethanol, isopropyl alcohol or 1-cyclohexyl-2-pyrrolidone; the water-soluble organic wetting agent is 1,2-propanediol, glycerine, ethylene glycol, diglycol, triethylene glycol or sorbitol; the wetting binding agent is 2-pyrrolidone, sodium sorbate, polyvinyl pyrrolidone or potassium sorbate. The color ink-jet printing ink is safe, environment-friendly, excellent in definition of a printed image, moderate in surface tension, viscosity and electrical conductivity, capable of clearly imaging on a printing stock medium without a coating, excellent in ink smoothness, unlikely to block an ink-jet printer ink gun, good in water resistance and photostability, and free of corrosion of a printer.

The present invention relates to ink producing technology, and is especially one kind of ink for jet printing and its preparation process. The ink for jet printing is prepared with colorant 9-22 wt%, diglycol 8-10 wt%, triethanolamine 0.035 -0.04 wt%, diethylene glycol butyl ether 6-8 wt%, polyvinylpyrrolidone 1.5-3 wt% and water for the rest. Its preparation process includes the steps of: mixing the components to form material liquid and sealing, filtering with a Buchner funnel, and sealing the filtrate as the product in plastic barrel.

The invention relates to a synthesis method of a novel ion battery positive pole material iron phosphate, belonging to the field of chemical synthesis. The synthesis method comprises the following experimental steps: sequentially adding (NH4)2HPO4, H3BO3, C2H4O4.2H2O, FeSO4.7H2O and NH3.H2O into secondary deionized water at room temperature, and mixing; after the mixed solution is uniformly mixed, putting the mixed solution into a reaction kettle, heating to react at 150-210 DEG C, and naturally cooling to room temperature; and washing with deionized water to obtain a massive green crystal, and naturally airing at room temperature, wherein the yield is about 50%. The method performs reaction under hydrothermal conditions, thereby lowering the cost and implementing green production. The raw material charging sequence and stoichiometric proportion, reaction temperature, reaction time and cooling time are regulated and controlled to greatly enhance the yield.

The invention provides a three-dimensional amorphous carbon frame porous charcoal and a preparation method and application thereof. The preparation method includes the following steps: pretreatment: making dry wood into wood blocks, and dissolving some components in the wood blocks through a solvent , enrich the micro-nano pore structure of the wood block to form a porous wood block; stabilize the pore structure: wash the porous wood block with deionized water several times, and then freeze-dry it; form amorphous carbon: pass the freeze-dried porous wood block through Double temperature gradient pyrolysis to obtain three-dimensional amorphous carbon framework-containing porous charcoal with nanoparticle decoration. The preparation method has simple preparation conditions; the prepared three-dimensional amorphous carbon frame porous charcoal has excellent comprehensive wave absorbing effect and can be used as a wave absorbing material, and the invention provides a new way for the value-added and efficient utilization of forest biomass.

The invention provides a bismuth oxide-assisted zirconia-based electrolyte and a preparation method thereof. By adopting the bismuth oxide composite scandium oxide stabilized zirconia electrolyte, the densification sintering temperature can be effectively reduced, and meanwhile, relatively high conductivity can be ensured.