Mixed material and preparation method thereof

Abstract

The invention relates to a mixed material. The mixed material comprises paste and a thermoplastic polymer; the paste comprises the following components: 1 part by weight of a nano material, 5-100 parts by weight of a liquid medium, and 0-50 (but not 0) parts by weight of an auxiliary agent; and the paste adheres to the surfaces of the thermoplastic polymer particles to form the mixed material. Theinvention also relates to a preparation method of the above mixed material. The method comprises the following steps: (1) mixing the nano material, the liquid medium and the auxiliary agent to prepare the paste; and (2) mixing the paste and the thermoplastic polymer to make the paste adhere to the surfaces of the thermoplastic polymer particles to prepare the mixed material. According to the method provided by the invention, the paste can be added into the reaction system in a pressureless state, the nano composite material is convenient for production and processing, after the paste and thethermoplastic polymer are mixed, the paste adheres to the surfaces of the thermoplastic polymer particles, the obtained mixed material does not slip after being added into equipment such as an extruder, the nano composite material can be directly prepared and is convenient for production and processing, and the method avoids the problem of poorer performance of a nano composite material caused bytoo early gasification of a liquid medium in the prior art.

Description

technical field [0001] The invention relates to a mixed material and a preparation method thereof. Background technique [0002] In the existing technology, layered nanomaterials and polymers are often mixed and extruded to form composite materials. Although the tensile strength of such composite materials has been improved, due to the poor compatibility between layered nanomaterials and polymers, As a result, the impact resistance of such materials is generally not high. [0003] In order to solve the above problems, methods such as intercalation in-situ polymerization are often used to make polymers react between layers of layered nanomaterials to improve the impact resistance of composite materials, but this process is time-consuming and the polymerization conditions are harsh. The solvent is not easy to recycle, which will bring derivative problems such as environmental pollution. [0004] Patent No. CN101081928A, proposed a kind of preparation method of polyamide / nano...

AI Technical Summary

Problems solved by technology

The preparation method is simple and the production cost is low, but this method is to add montmorillonite mud after polyamide melting, which will cause the montmorillonite mud to be completely mixed with the copolymer in the future, and the water between the layers will be gasified due to high temperature. As a result, the polyamide failed to enter the interlayer in time. At the same time, the energy generated only by water vaporization was not enough to completely peel off the montmorillonite layer, so a completely peeled composite material could not be obtained, and its product performance was greatly affected. influences

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