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Self-dispersion type nanometer gamma A100H and its preparation method and use

A nano and dispersed technology, applied in the direction of alumina/aluminum hydroxide, etc., to achieve the effect of stable and uniform performance, small particle size and narrow distribution

Inactive Publication Date: 2006-11-29
GUANGXI UNIV FOR NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The nano-AlOOH introduced in the above-mentioned open documents has no report to have self-dispersion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] First, add 10wt% sulfuric acid solution into the sodium aluminate solution, stir at room temperature until the pH of the solution is 9, extract the precipitate generated after the reaction, adjust it into a slurry containing 0.3mol / L aluminum, and then add 20wt% acetic acid Solution, 3wt% polyvinyl alcohol, heat preservation at 110 ℃ for 0.5 hours, transfer the obtained aluminum hydroxide jelly to the reaction kettle, add 1.5wt% ammonium bromide and 2.0wt% cetyltrimethyl The ammonium chloride is mixed evenly, and then spray-dried at 170° C. to obtain a pure-phase nanometer γ-AlOOH crystal powder with self-dispersibility in the solution solvent.

Embodiment 2

[0029]First, add 10wt% ammonium bicarbonate solution to the aluminum sulfate solution, stir at room temperature until the pH of the solution is 8, extract the precipitate generated after the reaction, adjust it into a slurry containing 0.8mol / L of aluminum, and then add 15wt% Hydrochloric acid solution, 4wt% ammonium polyacrylate, heat preservation at 90°C for 2 hours, transfer the obtained aluminum hydroxide jelly to the reaction kettle, add 0.5wt% ammonium fluoride and 1.0wt% cetyl tris Methyl ammonium chloride is mixed uniformly, heated to 100°C, and then spray-dried at 180°C to obtain pure-phase nanometer γ-AlOOH crystal powder with self-dispersibility in the solution solvent.

Embodiment 3

[0031] First, add 15wt% hydrochloric acid solution into the sodium aluminate solution, stir at room temperature until the pH of the solution is 9, extract the precipitate generated after the reaction, adjust it into a slurry containing 1.0mol / L of aluminum, and then add 10wt% hydrochloric acid Solution, 8wt% PEG, kept at 110°C for 1.0 hour, transferred the obtained aluminum hydroxide jelly to the reaction kettle, added 1.5wt% ammonium bromide and 2.0wt% hexadecyl trimethyl chloride The ammonium is mixed evenly, and then spray-dried at 160° C. to obtain a pure-phase nanometer γ-AlOOH crystal powder with self-dispersibility in the solution solvent.

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Abstract

A gamma-AlOOH nanocrystal powder able to be automatically dispersed in aqueous and some organic solvents for preparing self-dispersing superfine non-toxic aluminum hydroxide flame-retarding agent, or the high-molecular polymer / inorganic nano-material composition, or the microcrystalline alumina ceramics or high-performance alumina ceramics as grinding medium is prepared through reaction of sodium aluminate or Al salt solution in alkaline medium, extracting the generated deposit, adding peptizing agent and disperser, peptizing and dispersing to obtain aluminum hydroxide colloid, reacting on additive and surfactant for surface modifying, and spray drying.

Description

Technical field: [0001] The invention relates to a nanometer aluminum hydroxide, especially a nanometer γ-AlOOH powder, a preparation method and application thereof. Background technique: [0002] In recent years, polymer-based / inorganic nanocomposites, as a newcomer in materials science, have attracted widespread attention. However, in polymer matrix / inorganic nanocomposites, the key issues to be solved are the dispersion of inorganic nanoparticles in the polymer matrix and the interfacial bonding between polymer and nanoparticles. Therefore, the exploration of inorganic nanopowder with good dispersibility and its preparation technology is becoming a research hotspot. [0003] Self-dispersing nano γ-AlOOH is an important inorganic functional material with attractive prospects: (1) Using a new process of sol uniformly dispersed quasi-homogeneous (liquid phase) mixing method, adding α-Al 2 o 3 Seed crystals and additives are calcined at low temperature (950-1100°C) to pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/02
Inventor 廖海达马少妹白丽娟
Owner GUANGXI UNIV FOR NATITIES
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