中文摘要：

探讨了水热处理对可逆热致变色竹粉/塑料复合材料的材色和力学性能的影响。通过ESEM观察竹粉/塑料试样表面的微观结构；分别利用FTIR和DSC方法表征试样表面化学成分的变化以及试样的结晶度。研究结果表明：水热处理对可逆热致变色竹粉/塑料复合材料各性能具有较大的影响，其影响程度为：水热80 ℃处理〉常温水浴处理〉干热80 ℃处理，水热处理使试样表面产生较大裂纹，接触角和力学性能明显降低，材色变化非常显著；常温水浴处理使得试样表面产生微裂纹，接触角略有降低，其力学性能呈现先升后降再升高的趋势，材色变化较明显；干热处理之后的试样表面光滑、平整，接触角反而增大，其力学性能变化不一致，材色变化不明显。红外光谱和差示扫描量热法分析表明，干热80 ℃、常温水浴和水热80 ℃处理使竹粉和高密度聚乙烯发生一定程度的降解，且高密度聚乙烯会发生再结晶现象。

英文摘要：

The effect of hydrothermal treatment on the color and mechanical properties of reversibly thermochromic bamboo flour/plastic composites was studied. ESEM observation was used to explain surface microstructure of reverisibly thermochromic bamboo/plastic composites. Surface chemical composition and crystallinity were determined by FTIR and DSC respectively. The results show that hydrothermal treatment has a great influence on the properties of bamboo/plastic composites with the order of hydro-thermal treatment at 80 ℃ 〉water-bath treatment 〉heat treatment at 80 ℃. There are many cracks appearing on the surface, contact angles and mechanical properties decrease obviously, and the color of samples changes greatly after hydro-thermal treatment at 80 ℃. There are some small cracks appearing on the surface, and contact angles decrease a little after water-bath treatment at room temperature. The mechanical properties of the bamboo flour/plastic composites presents firstly increasing then decreasing and then increasing again, and the color of samples change more obviously after water-bath treatment. The surface is smooth and the color change a little, the contact angles turn bigger after heat treatment at 80 ℃. The results of FTIR and DSC indicate that the bamboo fibre and high density polyethelene （HDPE） molecular chain lead to degradation in some extent, and recrystallization of HDPE is found after heat treatment at 80 ℃, water-bath treatment and hydro-thermal treatment at 80 ℃.