China Youth Daily Client (Wang Min, China Youth Daily·China Youth Network reporter Wang Haihan, Wang Lei) Recently, University of Science and Technology of China Academician Yu Shuhong's team used the collaborative strategy of multi-scale imaging and multimodal mechanical properties research to systematically analyze and clarify the spatial multi-level fiber assembly structure in the bamboo joints. The results were published in the National Science Review, and the research provides new design solutions for the future creation of bionic fiber composite structural materials.
bamboo joint space heterogeneous multi-level micro-nano fiber structure. Photo provided by China University of Science and Technology
Momobamboo has gradually become a sustainable resource to replace wood and chemical synthetic products with its advantages such as light weight and rapid growth. Compared with bamboo, short bamboo joints seem to have weak mechanical properties, and they are often discarded in the processing of engineering fiber laminates. But in fact, in the survival and development of tall and straight bamboo, bamboo joints play a role in fixed-point mechanical support and strengthening and multi-directional fluid transportation. Researchers believe that this dual-function or multifunctional realization must be closely related to the internal structure of the bamboo joints, but the relationship between the spatial fiber structure and the "structure-function" of the bamboo joints is still unclear.
Researchers also used three-dimensional X-ray computed tomography to find that multi-order fibers arranged in the bamboo joints can realize liquid transport and exchange, and confirmed the integrated design of multi-order fiber structure reinforcement and liquid transport. Inspired by this multifunctional integration, a bamboo joint-based photothermal water evaporation device was designed, which exhibits good structural stability and evaporation performance.
This study uses a combination of experiments and theory to analyze the complex fiber structural characteristics in bamboo joints in detail, and extract and verify three fiber reinforced structural schemes. The research will provide guidance for the optimized design and preparation of high-performance fiber composite structural materials.
Source: China Youth Daily Client
