Effect of bagasse content on low frequency acoustic performance of soy oil-based biodegradable foams filled with bagasse and regulation mechanism analysis |
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Authors: | Jin Zhao Zengcheng Yu Huafeng Tian Shilin Liu Xiaogang Luo |
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Affiliation: | 1. Hubei Light Industry Technology Institute, Wuhan, China;2. School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan, China;3. Key laboratory of Processing and Quality Evaluation Technology of Green Plastics of China National Light Industry council, Beijing Technology and Business University, Beijing, China;4. College of Food Science & Technology, Huazhong Agricultural University, Wuhan, China School of Materials Science and Engineering, Zhengzhou University, Zhengzhou City, China |
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Abstract: | Reducing noise by using sound absorption materials is an important approach to lessen the harm of noise pollution. Controlling acoustic performance and analyzing the mechanism of the flexible polyurethane biofoams derived from vegetable oil polyol and filled with agricultural and forestry wastes can provide theoretical guidance in designing the biodegradable energy-saving sound absorbing materials. A series of biofoams were synthesized by using soy oil-based polyol instead of 50 wt% petroleum-based polyol with different content of natural resource bagasse as fillers. The material is characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis to study the morphology, chemical interaction between constituent phases and thermal stability respectively. The effects of bagasse on morphology, mechanical properties, thermal properties, sound absorption coefficient and degradability of biofoams were investigated. Natural resource bagasse can improve the sound absorption coefficient at low frequency region by changing the cell size, opening ratio and cell wall structure of biofoams. The study confirms that it is possible to control and enhance the acoustic performance of the biofoams by adjusting bagasse content for sound absorption materials. |
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Keywords: | biodegradable biopolymers and renewable polymers molding |
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