关键词: 蚕茧壳, 热传导性能, 多层结构, 多孔介质

Abstract:

In order to develop and design new functional textiles, multilayer morphology, chemical structure, crystalline structure, mechanical properties and thermal conductivity of four varieties of different silkworm cocoons walls were characterized by scanning electron microscope, Fourier transform infrared spectroscopy, X-ray diffractometer, universal material testing machine and temperature and humidity tester, respectively. Theoretical analysis on the multilayer structure was conducted and the design principle of thermal protection products was studied and established. Research results show that all the four varieties of cocoon walls have unique multilayer porous structure, and the diameter of the fibers first increase and then decrease from the outer layer to the inner layer. Although the thickness and size are different, the four varieties of silkworm cocoon walls have good thermal buffering properties. In general, the tiger head cocoon wall has the best heat resistance, and the zebra cocoon wall (green) has the best thermal conductivity. When designing the multilayer structure of thermal protection products, the thermal insulation effect will be greatly improved by appropriately increasing the number of layers of thermal protection products under cost permission.

Key words: cocoon wall, thermal conductivity, multilayer structure, porous media