Non-sterilized substrates mainly composed of soybean straw were used to cultivate Ceriporia lacerata for preparing mycelium-soybean straw composite materials (MSCM) in this research. The effect of the particle sizes of soybean straw on preparing MSCM was evaluated. Compression properties, thermal conductivity and sound absorption properties of MSCM were tested. The results showed that cultivation of C. lacerata with non-sterilized substrates could be applied to prepare MSCM. It was conducive to mycelium growth and molding of MSCM while the particle sizes of soybean straw were bigger within a certain range. And the results of the tests showed that MSCM had properties of high compressive strength, good thermal insulation and good sound absorption.
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