后处理工艺对秸秆-木屑板材密实度的影响研究

Study on the Effects of Post-treatment Process on the Compactness of Straw-sawdust Boards

密实度是板材制备中非常重要的指标之一。基于单因素试验探究保压时间(12 h、24 h、36 h)、烘干温度(90℃、110℃、130℃)、烘干时间(1 h、2 h、3 h)对秸秆-木屑复合板材密实度影响规律;基于响应面法探究三个因素交互作用对密实度的影响以及最佳后处理工艺参数。研究结果表明:影响密实度的因素有保压时间(A)、烘干温度(B)、烘干时间(C),其显著性顺序为A>B>C;保压时间与烘干温度、保压时间与烘干时间之间有极显著的交互作用,共同影响复合板材密实度;最佳后处理参数为保压时间35.76 h,烘干温度106.6℃,烘干时间2.2 h,此时板材的预测密实度为1326.46 kg/m^(3),与实际测量值接近,具有一定的参考价值。

Density is one of the very important indexes for the preparation of boards.This study is based on single factor experiments to explore the rules of effects of pressure holding time(12 h,24 h and 36 h),drying temperature(90℃,110℃and 130℃),and drying time(1 h,2 h,3 h)on the compactness of straw-sawdust boards;based on the response surface method to explore the influence of the interaction of the three factors on the compactness and the best post-treatment process parameters.The research results show that the factors that influence the compactness include pressure holding time(A),drying temperature(B),and drying time(C),the order of significance being A>B>C;pressure holding time and drying temperature,There is a very significant interaction between the pressure holding time and the drying time;the pressure holding time and the drying time,which together influence the compactness of the composite board;the best post-processing parameters are the pressure holding time of 35.52 h,the drying temperature of 108.38℃,and the drying time of 2.4 h,in which case the predicted compactness is 1326.46 kg/m^(3),which is close to the actual measured value and has a certain reference value.