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Development of Plant Fibre Foam and Study of Its Thermal Insulation Properties

At present, the research and production of green fiber materials that replace plastics are becoming the consistent proposition of all countries that pay attention to environmental protection. In order to improve the thermal insulation properties of forest plant-based foams, which are low-cost and non-polluting, this paper explores the preparation of forest plant-based foams and the determination of their thermal insulation properties. Firstly, based on the three-factor orthogonal experimental method, variables such as the ratio of materials that may affect the foaming rate and the size of the mould were designed, and the influence of these variables on the foaming rate of the material was analysed. Then, for the samples obtained, slices were made and the thermal conductivity of the sample was measured by the hot plate method, and finally, for the measurement results, the influence of the foaming rate on the thermal conductivity was analysed by non-linear regression, and the regression equation between the two. The results show that the size of the mould has the greatest influence on the foaming rate out of all the independent variables influencing the results. At a foaming rate of 19.8%, the thermal conductivity of the material was the lowest and the material had the best thermal insulation effect.