以玉米秸秆皮/HDPE（高密度聚乙烯）复合材、杨木、松木，及杨木/HDPE、松木/HDPE复合材为研究对象，分别将它们置于温度为20℃，相对湿度分别为33%、66%、75%、85%、93%的干燥器中干燥，待其吸湿/解吸达到平衡后测量其含水率，并与尼尔森（Nelson）模型进行拟合。结果表明，玉米秸秆皮是玉米秸秆皮/HDPE复合材的主要吸湿成分，复合材料的平衡含水率随相对湿度和玉米秸秆皮含量的增加而增加。玉米秸秆皮/HDPE复合材的吸湿、解吸性能低于杨木/HDPE、松木/HDPE复合材，也低于实体木材。 Nelson模型能够预测玉米秸秆皮/HDPE复合材在不同环境下的平衡含水率。%Corn stalk rind/HDPE,poplar,pine,poplar/HDPE and pine/HDPE composites are used as research objects and placed in desiccators whose temperature is 20 ℃and relative humidity is 33%,66%,75%,85% and 93% respectively for a while,followed by measurement of their moisture content after balanced moisture absorption and desorption,and fitting a-gainst the Nelson’s model. The result shows that corn stalk rind is the major part in moisture absorption of corn stalk rink/HDPE. The EMC of corn stalk rind/HDPE increases with the increases in the RH and the content of corn stalk rind. The moisture absorption and desorption characteristics of corn stalk rind/HDPE composite are lower than poplar/HDPE, pine/HDPE composite and solid wood. Nelson’s model can be used to predict the EMC of corn stalk rind /HDPE composites under varying environmental conditions.
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