Research On Preparation And Performance Of Resin Nanocomposite By Liquid Shock Wave

The performance of resin-based composite materials can effectively been improved by nano-reinforced materials, when nano-material directly mixed with the matrix resin, due to its special surface structure, which is more difficult to disperse than the powder material and can't play the role and performance of nano-material. In this paper, a high-energy liquid shock wave pressure processing technology was presented according to the focus of pulsed ultrasound techniques, using high-power piezoelectric shock wave generator produces high-energy, high voltage transient shock wave in the water medium to process the material lying in the focal area. The experiment system was established to explore the application of the shock wave in nanomaterial dispersion and the preparing technology for the nanocomposites. The nanomaterial was evently dispersed in the matrix resin. An advanced manufacturing technology for the processing of polymer material was provided, which is high efficiency, low cost, good energy control, safe clean and wide application and so on.In this paper, the based on epoxy resin epoxy resin nanocomposite was prepared by using E-44 as the substrate, SiO2 nano-material as a reinforcing agent. Focused, the influence of the conventional ultrasonic method and the high-energy shock wave method on the curing process, mechanical properties, heat resistance of nanocomposite were studied, the dispersion and mechanism the nano-materials in the matrix were discussed. Under different processing conditions, contrast experiments of general ultrasound and shock wave were did to analysis the performance of the product and make an experimental validation.The details as follows:1. The key components of the liquid shock wave generator system were briefly introduced, and the design of flat circular array shock wave generator and sound field simulation were discussed. Using Matlab language of the sound field calculation program, the shock wave generator's sound field characteristics were preliminarily studied by means of of the sound field simulation. Through based on coordinate transformation method for plane circular multi-array sound field calculations, the influence of the number and arrangement on the array on the focusing properties of sound pressure were discussed.2. The non-isothermal curing kinetics of nmSiO2/E44 nanocomposites cured with anhydride was investigated by using the differential scanning calorimetry (DSC). As for the nanocomposites containing different amount of nmSiO2, the values of activation (Ea), reaction order (n), theoretic gelling temperature and theoretic curing temperature were evaluated by using Kissinger, Ozawa methods and Crane formula, and the curing process of the resin system was determined. The effects of nmSiO2 on the curing reaction and the curing reaction mechanism of the system were discussed.3. The best ultrasonic time and nmSiO2 concentration process parameters were made by ordinary ultrasonic method, and its mechanical properties, heat resistance, hardness and ultrasound chemical mechanism of composite material were researched and analysised.4. Contrast to the general ultrasonic method, the performance superiority was studied by shock wave method. And the influence of shock time, duty cycle, depth of shock wave, nmSiO2 content on mechanical properties, heat resistance, and its chemical mechanism of shock wave were researched and analysised.5. The reinforcing and toughening mechanisms of nmSiO2/EP nanocomposite were analysised and studied. A new view of strengthened dispersion was put forward.6. For the first time the dispersion mechanism and technology law under the High Energy Shock Wave of nano-materials were explored. And the relationship between sound chemical effect and composite process based on the resin material were discussed. It can reduce the thermal processing time, lower manufacturing costs, provide a scientific and feasible method for the resin based nanocomposite material.