再生纤维素材料的结构重构和调控

在再生纤维材料的制备过程中，纤维素分子间和分子内的氢键网络和聚集态结构的重构和调控对制备理想的再生纤维素材料至关重要，是本领域的一个重要的基础科学问题。本项目采用不同纤维素溶剂体系制备纤维素溶液，研究纤维素由溶液再生过程中氢键网络和聚集态结构重构和演化过程。通过本项目研究工作的进行，建立再生纤维素材料氢键网络结构的研究方法，阐明氢键网络和聚集态结构的重构机制和影响因素，明确再生纤维素材料氢键网络和聚集态结构的调控方法。在此基础上，建立再生纤维素材料的氢键网络和聚集态结构与材料性能的相关性，明确再生纤维素材料结构和性能可行的调控方法。本研究工作可以为现有再生纤维素产品的品质改进和技术升级提供理论支撑，为利用纤维素新溶剂体系制备再生纤维素材料的流程设计和工艺参数选择提供基础理论支持，并对新型再生纤维素材料的结构和性能可控提供科学依据。

The key issue in preparing regenerated cellulose materials is the reconstruction and regulation of the hydrogen bonding network of cellulose as well as the condensed state structures during regenerating procedures, which is one of the fundamental topics in this field. In this project, cellulose solutions in different solvent systems will be first prepared. The reconstruction and development of the hydrogen networks and condensed state structures of cellulose, as well as the factors that affect them, will be investigated in details during the regenerating procedures. With the research carried out in this project, new methods for charactering the hydrogen bonding networks of regenerated cellulose will be developed. The mechanism of the reconstruction and regulation of the hydrogen bonding networks and condensed state structures will be illuminated and approaches for regulating the hydrogen networks and condensed state structures of the regenerated cellulose materials will be developed. Based on the researches carried out in this project, the correlation between the structure and properties of regenerated cellulose materials will be discussed for the purpose to establish fissile methods for producing regenerated cellulose materials with desired structure and properties. Besides providing the fundamental knowledge for promoting qualities of the regenerated cellulose materials that produced by the routine procedure, this research is helpful for the setups of the new processes and the selection of technical parameters in the preparation of regenerated cellulose materials by using new cellulose solvent systems.