30results about How to "Avoid aggregation and sedimentation" patented technology

The invention discloses a liquid expansion agent with a high expansion rate and a preparation method thereof. The expansion agent is prepared by the following steps: Step 1: weighing the expansion component modified by oil, butanol, simethicone oil, and Span 80 and water were stirred at a constant temperature of 40-50°C for 0.5-1h; Step 2: Raise the temperature to 70-80°C, add polypropylene alcohol 400 and shrinkage reducing components in turn, and continue stirring for 1-2h; Step 3: Add cationic poly Acrylamide, stirred for 2 hours, matured at constant temperature for 1 hour, and then cooled to room temperature to obtain a high-expansion liquid expansion agent. The liquid expansion agent of the present invention is mainly used for high-grade concrete and concrete that needs to compensate for shrinkage. The expansion component is composed of calcium sulfoaluminate clinker, anhydrous aluminum sulfate and anhydrous gypsum, and the hydration rate of the expansion component can be effectively controlled. Significantly increase the volume expansion of concrete, reduce the volume shrinkage of concrete, and improve the anti-crack and impermeability of concrete.

The invention discloses a step-by-step expansion liquid expansion agent and a preparation method thereof. The liquid expansion agent is prepared by the following steps: Step 1: Weigh the mixture of nano-magnesium oxide powder, butanol, Span 80 and water at 30 Stir at a constant temperature of ~40°C for 1 hour; step 2: heat up to 50~70°C, add polyacryl alcohol 400, simethicone and shrinkage reducing components in sequence, and stir for 1~2 hours; step 3: add polyacrylamide, stir for 1 hour ~2h, aging at constant temperature for 1h, and cooling to room temperature to obtain a step-by-step expansion liquid expansion agent. The expansion component in the liquid expansion agent of the present invention is formed by modifying and mixing magnesium oxide powder fired at different temperatures of 700°C, 900°C and 1100°C. The magnesium oxide powder is mixed and ground to the nanometer level, and fired in three different The hydration time of magnesium oxide powder at different temperatures can achieve the effect of gradual expansion; compounding with shrinkage reducing components can significantly increase the volume expansion of concrete, reduce the volume shrinkage of concrete, and improve the crack resistance and impermeability of concrete.

The invention relates to a preparation method for high-alkaline calcium naphthenate. In the method, calcium hydroxide and calcium oxide are taken as calcifying agents, pure water is replaced by alkaline aqueous solution, and a mode of multiple addition is adopted to prepare a calcium naphthenate product with the base number of more than or equal to 350 mgKOH / g. The product has the advantages of low viscosity and turbidity and better high temperature cleanliness.

The invention discloses a lithium ion battery positive electrode slurry and its preparation method and application. A viscosity reducer is introduced into the positive electrode slurry, and the viscosity reducer can be adsorbed on the surface of lithium iron phosphate active material to effectively regulate the surface space of lithium iron phosphate nanoparticles. The steric hindrance and Zeta potential prevent the aggregation and settlement of the lithium iron phosphate active material, thereby suppressing the viscosity rebound and even the gel problem of the positive electrode slurry after standing still. The present invention pre-dries the lithium iron phosphate active material and the first conductive agent Adding a viscosity reducer can effectively regulate the steric hindrance and Zeta potential of the surface of lithium iron phosphate nanoparticles, prevent the aggregation and sedimentation of lithium iron phosphate active materials, thereby inhibiting the viscosity rebound and even gel problems of the positive electrode slurry after standing, and the iron phosphate The pre-dry mixing of the lithium active material and the first conductive agent can form a structure in which the carbon black uniformly covers the active material, which is beneficial to the conductivity of the positive lithium iron phosphate, reduces internal resistance, and improves electrochemical performance.

The invention provides a method for preparing a quantum dot light-emitting diode, comprising the following steps: providing a bottom electrode substrate, forming a first nanocolumn structure on the surface of the bottom electrode of the bottom electrode substrate; For the quantum dots containing the initial ligands, the target ligands are used to carry out ligand exchange on the quantum dots bound with the initial ligands on the surface, so as to prepare the quantum dot films bound with the target ligands. The preparation method of the quantum dot light-emitting diode provided by the invention can obtain the quantum dot thin film with good dispersibility and charge injection and transport ability.

The invention discloses a novel phase-change material composition. The novel phase-change material composition mainly comprises carbon nanotubes, graphene, fumed silica, metal or metal oxide particles and a phase-change material. The carbon nanotubes, graphene and metal or metal oxide particles can further accelerate heat transmission. The phase-change material is used for improving a hot end initial temperature absorption rate. The fumed silica has effects of precipitation prevention and thickening and can prevent graphene and particle aggregation settlement after heat absorption liquefaction of the phase-change material. The carbon nanotubes, graphene and metal or metal oxides can finally form a full 3D network comprising particles (metal or metal oxides), wires (carbon nanotubes) and planes (graphene) in the fluid (of phase-change material subjected to heat absorption melting). The novel phase-change material composition has high heat conductivity and low thermal resistance value, has high specific heat capacity, greatly improves phase-change material heat absorption, heat storage and heat radiation efficiency and has a high practical value.

The invention relates to a preparation method of a nanometer zirconia heat barrier coating which is mixed with rare-earth oxide and used for liquid-phase plasma spraying. The method comprises that precursor sol is used as a spraying raw material, atomized into fine liquid drops under atomized gas pressure, sent into plasma flame flow and sprayed and deposited on a matrix to obtain the nanometer zirconia heat barrier coating. The precursor sol is hydroxid precursor sol. According to weight proportion, the raw material includes 63 to 73 percent of ZrOCl2.8H2O and 27 to 37 percent of crystalline-state stabilizer oxide which is rare earth oxide. The invention can overcome the problems of poor sol distribution, poor sol flowing performance, chlorid ion erosion, poor sol granule atomizing effect, uneven granule sizes, and the like in the the traditional liquid-phase plasma spraying process. In the invention, a composite coating is prepared, and has the advantages of high depositing efficiency, low cost, wide spraying material, strong adaptability of the liquid-phase precursor, low heat conductivity, good heat and shock resistance, and the like.

The present invention relates to a traditional Chinese medicine composite thermosensitive gel embolic agent, a preparation method and application thereof. α (HIF‑1 α ), a mixed oil phase of tributyrin and ethyl oleate, a surfactant, a co-surfactant and water, and the Chinese medicine polysaccharide composite temperature-sensitive material is N -The hydrogel material obtained by the polymerization of isopropylacrylamide in the traditional Chinese medicine polysaccharide solution. The traditional Chinese medicine compound thermosensitive gel embolizing agent of the present invention can significantly enhance the embolic effect of the embolizing agent on the end of liver cancer blood vessels, promote the thrombus formation at the embolization site, and induce M1-type polarization and HIF-1 of tumor-associated macrophages (TAMs) by inducing α Its expression remodels the tumor immune microenvironment, improves the efficacy of interventional therapy for liver cancer, and reduces the risk of recurrence.

The liquid ejection apparatus includes: a recording head which includes a nozzle and an ejection device, the ejection device ejecting an ejection liquid through the nozzle by applying pressure to the ejection liquid in the recording head; a liquid accommodation unit which is in connection with the recording head and which accommodates a gas, the ejection liquid to be supplied to the recording head, and a non-volatile liquid having a permeability to the gas lower than the ejection liquid, the ejection liquid being separated from the gas by the non-volatile liquid; and a pressure control unit which controls pressure of the ejection liquid in the liquid accommodation unit by moving the gas into and out of the liquid accommodation unit.