自水解在木质纤维原料的预处理工艺中得到了广泛的应用。自水解预处理不仅能够实现木质纤维原料的高效利用，而且对其后续处理工艺及产品质量均具有显著的影响。本项目以速生材杨木为研究对象，对自水解预处理后木片的超微结构、化学组成和物理性能的变化及其对后续制浆碱液吸收产生的影响进行深入、系统的研究。通过研究不同自水解预处理程度下，木质纤维原料超微结构及化学组成的变化规律，以及超微结构及化学组成对碱液在不同工艺条件下反应性吸收的影响机制，建立自水解预处理木质纤维对碱液吸收的理论模型。该项目的研究将有利于进一步丰富和完善木质纤维的吸附理论，促进生物质精炼与制浆造纸工业的高效结合。

Autohydrolysis has been widely used in the pre-treatment of lignocelluloses. It can not only realize a high efficiency utilization of lignocelluloses but also has a significant influence on the subsequent processing and quality of final products. In the present work, poplar, one kind of fast-growing wood, is chosen as the object, the changes of ultrastructures, chemical compositions, and some physical properties of the wood chips after autohydrolysis pretreatment, and its influence on the absorption of alkaline liquor in the subsequent pulping will be studied thoroughly and systematically. It is expected to establish the theory model of autohydrolysis pre-treated lignocelluloses’ reactivity absorption of the alkaline liquor by investigating the changes of lignocelluloses’ ultrastructures and chemical compositions under different autohydrolysis pretreatment intensities, and its influence mechanism of ultrastructures and chemical compositions of autohydrolysis pre-treated lignocelluloses on the absorption of alkaline liquor. This work will be useful to enrich and perfect the present theory of lignocelluloses’ absorption, and promote the integration of biorefineries and pulp & paper industry.