Polymer composite material containing boron nitride aerogel and preparation method and application thereof

Abstract

The invention discloses a polymer composite material containing boron nitride aerogel, and a preparation method and application thereof. The polymer composite material is prepared from 1-20 wt% of theboron nitride aerogel and 80-99wt% of resin. The preparation method comprises the following steps: preparing hydroxylated boron nitride through assisted stripping of sodium cholate, then preparing anelastic boron nitride aerogel through a double-crosslinking reaction, and finally performing vacuum infusion to obtain the polymer thermal-response composite material containing the double-crosslinked elastic boron nitride aerogel. At present, research on application of a three-dimensional boron nitride / polymer composite material with high thermal conductivity and mechanical strength to a thermalresponse composite material has not been reported. The polymer composite material containing the boron nitride aerogel provided by the invention has good elasticity, the mechanical strength of thermal response compounding is improved, a continuous three-dimensional heat conduction path is constructed, and the heat conduction performance of the thermal-response composite material is improved. Thecomposite material disclosed by the invention can be used as a thermal-response composite material in a stimuli-responsive material and is used for preparing an intelligent driver and a sensor.

Description

technical field [0001] The invention relates to the technical field of stimulating thermal response composite materials, in particular to a polymer composite material containing boron nitride airgel, a preparation method and an application thereof. Background technique [0002] In recent years, materials capable of monitoring and responding to changes in the external environment have attracted increasing attention. Along with the research on these smart materials, stimuli-responsive materials have aroused the interest of scientific researchers and become one of the research hotspots in the field of functional materials research. Stimulus-responsive materials refer to their ability to respond to changes in the external environment. According to the mechanism of stimulus response, stimuli-responsive materials can be divided into the following types: temperature-responsive materials, light-responsive materials and other responsive materials. Material. [0003] At present, the...

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Problems solved by technology

This method requires two-way freezing to obtain boron nitride airgel with a lamellar orientation structure to form an efficient heat conduction path. It requires the use of special preparation equipment, high requirements for the preparation equipment, and high energy consumption during the preparation process.

At the same time, this material only has good thermal conductivity, but its mechanical strength is limited, so it is only used as a heat dissipation material for electronic components, not suitable for thermal response composite materials, and cannot be used in products such as smart drives and sensors. manufacture

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