项目名称： 同步辐射X射线/拉曼光谱联用技术研究不同晶型纤维素纳米晶增强聚合物性能的机制

项目编号： No.11505272

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 缪夏然

作者单位： 中国科学院上海应用物理研究所

项目金额： 23万元

中文摘要： 随着人们面临的环境污染和资源短缺问题日益严峻，开发新型绿色环保可再生资源已迫在眉睫。纤维素作为自然界中含量最丰富的天然高分子材料，因其自身诸多优点在材料领域有着巨大的应用前景。从纤维素中分离出纤维素纳米晶作为增强剂增强聚合物便是目前纤维素应用最广泛的领域之一，但纤维素纳米晶晶型与增强聚合物性能之间的关系尚未被关注，且纤维素纳米晶增强聚合物的机制仍不明确。为此，本项目拟在上海同步辐射光源小角散射线站搭建SAXS、WAXS和拉曼光谱联用装置，在完成不同晶型纤维素纳米晶复合材料可控制备的基础上对其进行原位变温拉伸实时研究，同时得出从分子尺寸到介观尺寸全面的微观结构的信息，并结合其它表征手段探索纤维素纳米晶微观结构与宏观性能之间的关系，阐述不同晶型纤维素纳米晶增强复合材料的机制。本项目的实施不仅为制备更高性能的纤维素纳米晶基复合材料提供了理论依据，也为我国材料科学研究提供一个重要的实验方法平台。

中文关键词： X射线散射；拉曼光谱；纤维素纳米晶；结构与性能；纳米复合材料

英文摘要： As people are faced with the increasingly serious problem of environmental pollution and resources shortage, the development of new type of green renewable resources have become urgent. As the most abundant content natural polymer materials, cellulose has a great application prospect in materials field because of its many advantages. Cellulose nanocrystals isolated from cellulose fiber as polymer reinforced agent is one of the most widely used field of cellulose, while the relationship between cellulose nanocrystals crystal shape and reinforced polymer properties has not been concerned and the mechanism how cellulose nanocrystals reinforced polymer is still not clear. Therefore, in this project, we aim to build a combination device of SAXS、WAXS and Raman spectrum, real-time research the comprehensive information of micro structure from molecular size to mesoscopic size of different crystal type cellulose nanocrystals based nanocomposites, then combine with other characterization methods to explore the relationship between microscopic structure and macroscopic properties and exposit the mechanism how different crystal type cellulose nanocrystals enhanced nanocomposites. The implementation of this project will not only provide a theoretical basis of preparing higher performance of cellulose nanocrystals based nanocomposites, but also build an important platform of experimental method for materials science researchers in China.

英文关键词： X-ray scattering;Raman spectrum;cellulose nanocrystals;structure and property;nanocomposite