Aluminum hydroxide/magnesium-based hydrotalcite multiphase-based material and preparation method for crystal whiskers thereof

Abstract

The invention discloses an aluminum hydroxide / magnesium-based hydrotalcite multiphase-based material and a preparation method for crystal whiskers thereof. The aluminum hydroxide / magnesium-based hydrotalcite multiphase-based material comprises magnesium ion solution prepared by mixing magnesium sulfate and magnesium nitrate in a molar ratio of 1:1, aluminum ion solution prepared by mixing aluminum chloride hexahydrate and sodium metaaluminate in a molar ratio of 1:1, sodium hydroxide and sodium carbonate. The preparation method comprises the following steps of: dissolving the magnesium sulfate and the magnesium nitrate into deionized water, dissolving the aluminum chloride hexahydrate and the sodium metaaluminate into the deionized water, and mixing to prepare aqueous solution of magnesium ions and aqueous solution of aluminum ions respectively; adding the sodium carbonate into the aqueous solution of magnesium ions and the aqueous solution of aluminum ions to obtain mixed solution; and adding sodium hydroxide solution into the mixed solution to obtain suspension of aluminum hydroxide / magnesium-based hydrotalcite, and precipitating, washing and aging the suspension to obtain white crystal whiskers of the aluminum hydroxide / magnesium-based hydrotalcite multiphase-based material. The preparation method has the characteristics of simple and reliable preparation process, no pollution, wide sources of raw materials and low preparation cost.

Description

technical field [0001] The invention belongs to the technical field of chemical materials, in particular to an aluminum hydroxide / magnesium-based hydrotalcite composite-phase base material and a method for preparing whiskers thereof. Background technique [0002] Whiskers are fibers grown in the form of single crystals under special conditions, with extremely small diameters, submicron and nanoscale sizes, highly ordered atomic arrangement structures, and the ability to enhance the strength of composite materials. It is a fiber grown in the form of a single crystal under artificial control conditions, its atomic arrangement is highly ordered, and its strength is close to the theoretical value of a complete crystal. Its mechanical strength is equal to the force between adjacent atoms. The highly oriented structure of whiskers gives them high strength, high modulus and high elongation. The strength of whiskers is much higher than that of other chopped fibers, and it is mainl...

AI Technical Summary

Problems solved by technology

[0006] For overcoming existing in the prior art or magnesium hydroxide whisker is affected by magnesium salt whisker MgSO 4 5Mg(OH) 2 ·3H 2 Due to the influence of O raw materials, whisker-like crystals cannot be generated; or due to the use of ammonia water, the danger of the preparation process or industrial production is increased; or high-activity magnesium oxide must be prepared first, which increases the difficulty of preparation; or special equipment needs to be configured. Insufficient, the present invention proposes a kind of aluminum hydroxide / magnesium base hydrotalcite composite phase base material and whisker preparation method thereof

Images