Performance of Lightweight Bamboo Fiber-Reinforced Sandwich Composites Applied in Automotive Interior
Greenness,lightweight and functionality are the main development directions of automotive materials.Sandwich structure composites with high specific strength and good thermal and acoustic insulation properties are composed of a thin hard surface layer and a cushioning core layer,which have been applied in automotive interiors.With bamboo fiber reinforced polypropylene/poly(lactic acid)composites as raw materials,the paper studies the effects of saturation temperature,pressure and holding time on its performance using the kettle pressure foaming process to produce foamed beads,and polypropylene foamed beads sheets are prepared as core layer to be combined with bamboo fiber/polypropylene composite sheet surface layer.The performances of the composites with different fiber contents are compared to explore their application in automotive interiors.In addition,melamine polyphosphate is used as a flame retardant to study its effect on the performance of the composites.The results show that the flexural modulus of the sandwich composite material prepared with polypropylene foamed beads is enhanced by up to 108.60%compared to the polyurethane sandwich material as the bamboo fiber content increases.In the scenario,the maximum roller peel strength is 20.13(N·mm)/mm,the thermal conductivity is about 0.040 W/(m·K),and the acoustic absorption coefficient is 0.177.The addition of melamine polyphosphate prolongs the combustion time,and the burning speed is significantly reduced to 13.5 mm/min.Bamboo fiber materials used in automotive interior sandwich structure can meet the requirements over lightweight automotive interior parts,which helps implement the initiative of"bamboo as a substitute for plastic",practise the concept of"dual carbon",and contributes to the green development of automotive industry.
bamboo fibersandwich structurelightweightautomotive interiorbamboo as a substitute for plastic
万方数据
维普
