This work is focused on the modification of the interphase zone in short flax fibres / polypropylene (PP) composites by a bio-inspired modification of fibres called “nanostructuration” that uses the adsorption of biomass by-products, i.e. cellulose nanocrystals (CNC) and xyloglucan (XG), to create hierarchical flax fibres. The wettability and interfacial adhesion study reveals a strong decrease in the polar character of CNC modified flax fibres, hence increasing the work of adhesion with PP. Moreover, combining XG/CNC modified interphases with MAPP coupling agent enhances the ultimate mechanical properties of biocomposites with higher tensile strength and work of rupture, and modifies failure mechanisms as revealed by in situ micro-mechanical tensile SEM experiments. Bio-based hierarchical composites inspired by naturally occurring nanostructures open a new path for the development of sustainable composites with enhanced structural properties.

这项工作的重点是通过生物启发的纤维改性（称为“纳米结构”）来改性短亚麻纤维/聚丙烯（PP）复合材料的相间区，这种改性利用生物质副产物的吸附，即纤维素纳米晶体（CNC）和木葡聚糖（XG），用于创建分层的亚麻纤维。润湿性和界面粘合性研究表明，CNC改性亚麻纤维的极性大大降低，因此增加了与PP的粘合力。此外，将XG / CNC改性的中间相与MAPP偶联剂结合使用可增强生物复合材料的最终机械性能，并具有更高的拉伸强度和断裂功，并改善原位揭示的破坏机理。微机械拉伸SEM实验。受天然存在的纳米结构启发的生物基分层复合材料为开发具有增强结构性能的可持续复合材料开辟了一条新途径。