分别采用超声分散和机械搅拌两种方法预处理碱液中的微晶纤维素,再在1 200 bar压力下通过高压均质法制备了微纤化纤维素,并研究了两种预处理方法对微纤化纤维素结构与性能的影响.通过对扫描电子显微镜(SEM),傅里叶红外光谱(FT-IR),X射线衍射(XRD)和热性能的分析表明,所得到的微纤化纤维素仍保持微晶纤维素的基本化学结构和晶型,但长径比增大了,热降解活化能降低了.其中,超声辅助处理的微纤化纤维素(MFC-2)分散更均匀,结晶度最大,说明这种预处理方法更利于形成分子排列规整度较高的聚集态结构.
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