Method for manufacturing high-performance hydrotalcite/calcium carbonate/rubber nano-composite materials

Abstract

The invention discloses a method for manufacturing high-performance hydrotalcite / calcium carbonate / rubber nano-composite materials. The method has the advantages that the stability of latex can be easily destroyed by filling of hydrotalcite with a positive electric property, solution systems of mixed fillers of calcium carbonate and the hydrotalcite with the negative electric property are prepared by the aid of hydroxyl reaction among modifiers, hydroxyl on hydrotalcite laminates and the surfaces of inorganic particles (such as the calcium carbonate), and can be regulated by means of increase of usage of the inorganic particles (such as the calcium carbonate) with negative electric properties, accordingly, rubber emulsion composite systems with the high-concentration hydrotalcite can be obtained, and highly filled hydrotalcite / rubber composite materials can be manufactured; the high-performance hydrotalcite / calcium carbonate / rubber nano-composite materials are excellent in gas tightness owing to lamella effects of the hydrotalcite; the organic compatibility can be improved owing to chemical reaction of the modifiers, and the high-performance hydrotalcite / calcium carbonate / rubber nano-composite materials are excellent in crack expansion resistance and mechanical property; the high-performance hydrotalcite / calcium carbonate / rubber nano-composite materials can be combined with rubber, plastics, fibers, adhesive and the like and can be hopefully importantly applied to the fields of materials for gas-tight layers of tires, aerospace sealing, medical sealing and the like.

Description

Technical field: [0001] The invention relates to a preparation method of a high-performance hydrotalcite / calcium carbonate / rubber nano composite material. In particular, it solves the problem that the surface of hydrotalcite is positively charged, and the rubber emulsion filled with negative charge is easy to cause early flocculation of the glue, and the problem that uniform dispersion and high filling cannot be obtained. Use negatively charged water-soluble suspensions containing inorganic particles (such as calcium carbonate, etc.) Ester coupling agent, etc.) to bridge hydrotalcite and inorganic particles, thereby preparing high-performance hydrotalcite / calcium carbonate / rubber nanocomposites. Background technique: [0002] Hydrotalcite is a layered double metal hydroxide (Layered Double Hydroxide Compounds, LDHs for short). Agents, bactericidal materials, adsorbents and anion exchangers, etc. Hydrotalcite belongs to the hexagonal crystal system, and its structure can b...

AI Technical Summary

Problems solved by technology

When a small amount of hydrotalcite is added to the rubber emulsion, the positive charge on the surface of the hydrotalcite will neutralize the negative charge on the surface of the latex, instantly destroying the stability of the latex. Therefore, it is impossible to add a higher amount of hydrotalcite, and the excellent properties of hydrotalcite cannot be exerted. Exercising functions such as barrier gas

In addition, hydrotalcite is a polar filler and has poor compatibility with the rubber organic matrix, so it cannot fully demonstrate the excellent properties of hydrotalcite sheet materials, which greatly limits the application of hydrotalcite in rubber materials.

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