吸声保温玉米秸秆穰板制备及性能研究

Study on Preparation and Properties of Sound Absorbing and Heat Insulating Corn Straw Pith Board

以疏解后的玉米秸秆穰丝为基材,异氰酸酯为胶黏剂,均匀组坯后经热压制备成吸声保温玉米秸秆穰板。通过单因素试验分别探究了施胶量、热压温度板材密度、厚度对玉米秸秆穰板吸声、导热和压缩性能的影响。结果表明:综合板材的性能和生产成本,优化工艺为施胶量2%、热压温度140℃、密度0.10 g/cm3,所得板材吸声性能达到GB/T 16731—1997的Ⅲ级标准,压缩强度满足GB/T 25975—2010中的要求,属高效保温材料。

In this study, a new sound-absorbing and heat-insulating material was prepared by using corn stalks, the corn stalks were smashed into crepe, and isocyanate was used as a binder. Finally, the corn stalks were obtained by hot pressing. The effects of glue amount, hot pressing temperature, density and thickness on the thermal conductivity, sound absorption and compression properties of corn straw board were investigated by single factor experiments in this work. As a result, the performance of the integrated sheet and the production cost were as follows: the amount of glue was 2%, the hot pressing temperature was 140 ℃, and the density was 0.10 g/cm3. The sound absorption performance of the obtained board reached the Class III standard of GB/T19731- 1997, and the compressive strength met the requirements in GB/T 25985-2010, and it was a highly efficient heat insulating material.