中文摘要：

以纳米纤维素为原料,通过多尺度微观结构设计,形成具有材料梯度和结构梯度的多层次结构,制造出具有超强机械性能的纤维素基复合材料将具有巨大的潜力。制备出性能可控的纳米纤维素原料是实现纳米纤维素功能化利用的前提条件。本研究采用浓硫酸水解法,在一定范围内可控制备了具有特定尺寸的纳米微晶纤维素,在此过程中研究了浓硫酸水解时间对制备的纳米纤维素得率、磺酸基团含量及纤维素降解产物的影响。

英文摘要：

Fabrication of nanocellulose composites with superior properties by rational design of multi-level gradients and multi-scale structures draws great attention from the research community. Controllable preparation of nanocellulose is a prerequisite step for manufacturing function nanocellulose composites. In the present study,cellulose nanocystals with specific dimensions were isolated in a control way by concentrated sulfuric acid hydrolysis.The effect of hydrolysis time on cellulose nanocrystals yield,sulfur content and cellulose degradation products were determined.