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Nano-silica dispersion liquid, preparation method thereof, and preparation method of cake

A technology of nano-silica and dispersion liquid, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc. It can solve the problems of poor stability of nano-silica sol, unsatisfactory colloidal state, and high colloid usage. problems, to achieve the effect of favorable stability, reduced gel hydration phenomenon, and strong gel strength

Active Publication Date: 2017-09-01
上饶市安纳拓新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The invention provides a nano-silica dispersion and a preparation method thereof, which solve the problems of poor stability of the existing nano-silica sol, easy demulsification, unsatisfactory gelation state, and high colloid usage; The preparation method of nano-silica cake, which improves the process of preparing nano-silica by precipitation method, by setting the neutralization reaction of inorganic acid and water glass as a multi-stage reaction under different conditions, and using a special washing process at the same time, In this way, the particle size and specific surface area of ​​nano-silicon oxide can be controlled during the preparation process, thereby preparing nano-silicon oxide cakes composed of nano-silicon oxide with small particle size and ultra-high specific surface area

Method used

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  • Nano-silica dispersion liquid, preparation method thereof, and preparation method of cake
  • Nano-silica dispersion liquid, preparation method thereof, and preparation method of cake
  • Nano-silica dispersion liquid, preparation method thereof, and preparation method of cake

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Embodiment 1

[0071] Embodiment 1, the preparation method of nano silicon oxide dispersion liquid, such as figure 1 As shown, the order includes adding dispersant step, adding nano silicon oxide step, adjusting pH value step and adding compatibilizer step:

[0072] (1) Step of adding dispersant: add deionized water to the reaction kettle, then add 6% dispersant and 0.1% stabilizer accounting for the mass percentage of nano-silica solids, and stir for 15 minutes at a temperature of 20°C; The dispersant is sodium polycarboxylate; the stabilizer is hydroxymethyl cellulose;

[0073] (2) Step of adding nano-silicon oxide: in the liquid obtained in step (1), add nano-silicon oxide cake, its solid nano-silicon oxide accounts for 5% of the mass percent of the nano-silicon oxide dispersion, at 20 ° C, Stir for 10 minutes; in the nano-silica cake, the nano-silica particle size is 1.5-10nm, and its specific surface area is 1128㎡ / g;

[0074] (3) The step of adjusting the pH value: adding lye to the l...

Embodiment 2

[0077] Embodiment 2, the preparation method of nano-silicon oxide dispersion liquid, the sequence includes adding dispersant step, adding nano-silicon oxide step, adjusting pH value step and adding compatibilizer step:

[0078] (1) Step of adding dispersant: add deionized water in the reaction kettle, then add 0.5% dispersant and 5% stabilizer accounting for the mass percentage of nano-silica solids, and stir for 15 minutes at 35°C; Described dispersant is alkyl polyoxyethylene ether (Pingping adds O); Described stabilizing agent is polyvinyl alcohol;

[0079] (2) Step of adding nano-silicon oxide: in the liquid obtained in step (1), add nano-silicon oxide cake, its solid matter accounts for 8% by mass of the nano-silicon oxide dispersion, and stir at a temperature of 50°C for 5 Minutes; in the nano-silica cake material, the nano-silica particle size is 1.5-10nm, and its specific surface area is 1100㎡ / g;

[0080] (3) The step of adjusting the pH value: adding lye to the liqui...

Embodiment 3

[0083] Embodiment 3, the preparation method of nano-silicon oxide dispersion liquid, the sequence includes adding dispersant step, adding nano-silicon oxide step, adjusting pH value step and adding compatibilizer step:

[0084] (1) Step of adding dispersant: add deionized water into the reaction kettle, then add 3% dispersant and 2% stabilizer accounting for the mass percentage of nano-silica solids, and stir for 10 minutes at a temperature of 50°C; The dispersant is glycerin; the stabilizer is hydroxyethyl cellulose;

[0085] (2) Step of adding nano-silicon oxide: in the liquid obtained in step (1), add nano-silicon oxide cake, its solid matter accounts for 11% of the mass percentage of nano-silicon oxide dispersion, and stir at 40°C for 8 Minutes; in the nano-silica cake, the nano-silica particle size is 1.5-10nm, and its specific surface area is 1160㎡ / g;

[0086] (3) Step of adjusting the pH value: adding lye to the liquid obtained in step (2), stirring for 30 minutes at a...

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Abstract

The invention discloses nanoscale silicon oxide composite dispersion liquid and a preparation method therefor, belongs to the technical field of nanomaterial preparation, and solves the problems of low stability, high probability of demulsification, non-ideal gel forming state, and high usage amount of gel in the existing nanoscale silicon oxide sol. The nanoscale silicon oxide composite dispersion liquid comprises nanoscale silicon oxide and deionized water, and the nanoscale silicon oxide composite dispersion liquid is colorless transparent liquid, the PH value of the composite dispersion liquid is 9-12, the specific gravity at the temperature of 25 DEG C is 1.07-1.13 g / cm3, and the viscosity at the temperature of 25 DEG C is 1.71-1.78 mPa.S; the preparation method for the nanoscale silicon oxide composite dispersion liquid comprises a step of adding a dispersing agent, a step of adding the nanoscale silicon oxide, a step of adjusting the PH value and a step of adding compatibilizer in sequence; the preparation method for the nanoscale silicon oxide cake material comprises a first-order reaction step, a second-order reaction step, an aging step and a washing step; and the obtained nanoscale silicon oxide cake material comprises nanoscale silicon oxide powder, the solid grain diameter of the nanoscale silicon oxide powder is 1.5-10 nm, and the specific surface area of the nanoscale silicon oxide powder is greater than or equal to 1, 100 m2 / g.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanomaterials, and in particular relates to a nano-silicon oxide dispersion liquid, a preparation method thereof, and a preparation method of a cake Background technique [0002] my country's lead-acid battery production capacity is 280 million kVAh, more than two-thirds of the global total. In recent years, the industry's output has increased at a rate of 20%. At present, lead-acid batteries also have low energy density and power density. , Applicable environmental temperature restrictions and other issues, the development of a new generation of nuclear energy, solar thermal utilization and photovoltaic thermal power generation, wind power technology and equipment, smart grids, plug-in hybrid vehicles, and pure electric vehicles clearly pointed out in the 12th Five-Year Plan, Higher and more stringent requirements are put forward for the quality and service conditions of the lead-acid batter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/10B82Y30/00
CPCB82Y30/00H01M10/10H01M2300/0085Y02E60/10
Inventor 徐翠云李翔刘欣
Owner 上饶市安纳拓新材料有限公司
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