引文信息：
Yina Zhuge & Fujuan Liu.Recent Progress of Bionic Hierarchical Structure in the Field of Thermal Insulation Protection. Journal of Bionic Engineering，2024，21（1），1- 18.Recent Progress of Bionic Hierarchical Structure in the Field of Thermal Insulation Protection
National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou, 215123, China
Abstract
Some living organisms with hierarchical structures in nature have received extensive attention in various fields. The hierarchical structure with multiple pores, a large number of solid–gas interfaces and tortuous conduction paths provide a new direction for the development of thermal insulation materials, making the living creatures under these extreme conditions become the bionic objects of scientific researchers. In this review, the research progress of bionic hierarchical structure in the field of heat insulation is highlighted. Polar bears, cocoons, penguin feathers and wool are typical examples of heat preservation hierarchy in nature to introduce their morphological characteristics. At the same time, the thermal insulation mechanism, fractal model and several preparation methods of bionic hierarchical structures are emphatically discussed. The application of hierarchical structures in various fields, especially in thermal insulation and infrared thermal stealth, is summarised. Finally, the hierarchical structure is prospected.
Fig. W1 Overview of hierarchical structure from morphology characterisation, thermal insulation mechanism, preparation method and application.
Fig. W2 Hierarchical structure of wool fibres .
Fig. W3 a Schematic diagram of hierarchical porous fibres prepared by micro-emulsion electrospinning. b Cross-section SEM image of fibres showing a porous inner structure and c a broken fibre showing aligned pores along the fibre.
Fig. W4 a A schematic diagram for preparation of silica carbon nanotube aerogels with membrane pore structure. b CA has super black appearance and slender skeleton. c CA/SiO2 aerogel does not show obvious surface changes, but skeletons become smooth and reinforced. d SNTA has high transparency, superhydrophobicity, and nanotube skeletons . e Bioinspired manufacturing process of porous carbon aerogels.
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