Manufacturing and process optimization of porous rice straw board

2017 International Symposium on Application of Materials Science and Energy Materials

材料科学;能源学

Liu, Dejun^1 ; Dong, Bing^2 ; Bai, Xuewei^1 ; Gao, Wei^1 ; Gong, Yuanjuan^1

Shenyang Agricultural University, Engineering College, Shenyang

110866, China^1

Shenyang Huachuang Industrial Technology Co. LTD, 110020, China^2

关键词: Development and utilizations;    Environmental pollutions;    Formaldehyde contents;    Hot pressing temperature;    Medium density fiberboards;    Optimal manufacturing;    Physical and mechanical properties;    Renewable materials;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/322/7/072065/pdf
DOI  :  10.1088/1757-899X/322/7/072065

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Development and utilization of straw resources and the production of straw board can dramatically reduce straw waste and environmental pollution associated with straw burning in China. However, the straw board production faces several challenges, such as improving the physical and mechanical properties, as well as eliminating its formaldehyde content. The recent research was to develop a new straw board compound adhesive containing both inorganic (MgSO4, MgCO3, active silicon and ALSiO4) and organic (bean gum and modified Methyl DiphenylDiisocyanate, MDI) gelling materials, to devise a new high frequency straw board hot pressing technique and to optimize the straw board production parameters. The results indicated that the key hot pressing parameters leading to porous straw board with optimal physical and mechanical properties. These parameters are as follows: an adhesive containing a 4:1 ratio of inorganic-to-organic gelled material, the percentage of adhesive in the total mass of preload straw materials is 40%, a hot-pressing temperature in the range of 120 °C to 140 °C, and a high frequency hot pressing for 10 times at a pressure of 30 MPa. Finally, the present work demonstrated that porous straw board fabricated under optimal manufacturing condition is an environmentally friendly and renewable materials, thereby meeting national standard of medium density fiberboard (MDF) with potential applications in the building industry.