纤维素基透明超疏水结构在木材表面仿生构建与调控

In order to explore the potential application of natural polymers in superhydrophobic modification of wood, to develop effective construction strategies of transparent superhydrophobic structure, and to improve the environmental friendly characteristics and visual properties of superhydrophobic wood, this project proposes a new approach for constructing cellulose-based superhydrophobic micro/nanostructures with high transparency on wood surfaces. After synthesis of a series of hydrophobic cellulose derivatives with excellent self-assembling properties, the cellulose-based micro/nanostructures will be constructed on wood surfaces by self-assembly. This study will concentrate on the key scientific problems in regard to cellulose-based micro/nanostructures, which include the stable forming mechanism of the micro/nanostructures, and effective regulation of superhydrophobicity and transparency. The superhydrophobicity, transparency and stability of cellulose-based micro/nanostructures on wood surfaces will be systematically characterized and evaluated. Through the study we aim at establishing efficient methods for the construction of cellulose-based superhydrophobic structures with high transparency and stability on wood surfaces. The forming mechanism of micro/nanostructures via self-assembly on wood surfaces will be revealed. This study could provide the theoretical basis for the superhydrophobic modification of wood using natural polymers and enrich the theoretical system of wood superhydrophobic modification.

为探索天然高分子材料在木材超疏水改性中的应用潜力，发展透明超疏水结构有效构筑策略，提高超疏水改性木材的环境友好性和视觉特性，本项目提出以纤维素为改性介质，在木材表面构筑高透明度超疏水微/纳结构的学术思想。通过合成一系列具有良好自组装性能的疏水性纤维素衍生物，运用超分子自组装方法在木材表面构筑微/纳仿生结构，重点研究微/纳结构稳定成形机制、超疏水和透明度有效调控机制等关键问题。从微观分子结构和宏观自组装结构两方面对纤维素基微/纳结构的超疏水性能、透明度、稳定性能等进行系统表征和对比评价，建立高透明度和高稳定性纤维素基超疏水结构在木材表面的高效构筑方法，揭示微/纳结构在木材表面自组装成形机理，为天然高分子材料对木材进行超疏水仿生改性提供理论基础，丰富木材超疏水仿生改性理论体系。

本项目创新性采用“物理-化学交联网络”、多元异质复合、“组装-溶解”等方法在木材表面成功构筑了10-十一碳烯酰化纤维素纳米颗粒自组装微/纳超疏水结构、负载无机纳米颗粒/纤维素纳米纤维复合超疏水结构、改性醋酸纤维素基高透明度超疏水结构等系列超疏水仿生结构。从微观分子结构和宏观组装结构两方面对纤维素基微/纳结构的超疏水性能、透明度、稳定性能等进行了系统表征和对比评价，建立了高透明度纤维素基超疏水结构在木材表面的高效构筑方法，揭示了超疏水微/纳结构在木材表面的成形机理，为天然高分子材料对木材进行超疏水仿生改性提供了理论基础，丰富了木材超疏水仿生改性理论体系。