Difference of morphological structures between goose down fiber and duck down fiber and their effect on thermal retaining property
The morphological structures of duck down fiber and goose down fiber were observed using an optical microscope and a scanning electron microscope. Quantitative analysis was conducted to the micro structures of goose and duck down fibers, including down stone, down branch, down fibril and node structure, as well as their differences. Then, the thermal retaining property of goose and duck down fibers was tested, respectively, and the effect of differences in structure on fiber's thermal retaining property was investigated. Compared with duck down, goose down possesses bigger down cluster, smaller down stone, longer and coarser down branch, and finer and more densely distributed down fibrils with nodes arranged even. This morphological structure gives the goose down better bulkiness and better thermal retaining property. To the same kind of down fiber, there is a nonlinear relationship between the fiber volume fraction and thermal conductivity. With the increasing of the volume fraction, the thermal conductivity of the fiber decreases firstly and then increases. When the volume fraction ranges from 0. 002 to 0. 005, the fiber possesses the best thermal retaining property.
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NSTL
万方数据
维普
