采用木聚糖酶溶液对西南桦木粉进行处理,并利用热压成型工艺制得西南桦木/高密度聚乙烯(HDPE)复合材料,考察酶溶液浓度、处理时间及温度对西南桦木/HDPE复合材料拉伸强度、弯曲强度等力学性能的影响,从而获得木聚糖酶处理的最佳工艺条件.借助傅里叶红外光谱分析技术和扫描电子显微镜,分析木聚糖酶处理后西南桦木纤维的化学官能团变化和西南桦木/HDPE复合材料的断面形貌.结果表明:木聚糖酶处理能够增强西南桦木/HDPE复合材料的界面结合.在木聚糖酶溶液浓度为2.67 mg/L,温度为40℃,pH值为4.5的条件下处理2h后,西南桦木粉的纤维素相对含量及结晶度增加,半纤维含量减小,木质素相对含量增加;木纤维的材质变软、表面变得粗糙,增大了与塑料分子的接触面积,从而提高了西南桦木/HDPE复合材料的力学性能.
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