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Characterization of superfine down powder
Author(s) -
Xu Weilin,
Wang Xin,
Cui Weigang,
Peng Xuqiang,
Li Wenbin,
Liu Xin
Publication year - 2008
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.29205
Subject(s) - thermogravimetric analysis , crystallinity , materials science , differential scanning calorimetry , fiber , scanning electron microscope , thermal stability , fourier transform infrared spectroscopy , composite material , particle size , powder diffraction , thermal analysis , particle size distribution , chemical engineering , thermal , crystallography , chemistry , physics , meteorology , engineering , thermodynamics
Superfine down powder was produced from down fiber after it was cut into short pieces and ground on a purpose‐built machine. Scanning electron microscopy photographs showed that the down fiber was ground into particles with some fiber fragments and a large amount of rod‐shaped ultrafine powder. Particle size distribution analysis indicated that the average size of the down powder was 1.546 μm. Fourier transform infrared analysis showed that the absorbing peaks around 1640, 1520, and 1230 cm −1 were sharper than those of the down fiber. X‐ray diffraction analysis revealed that the crystallinity of the superfine down powder was a little lower than that of the down fiber. Thermogravimetric analysis showed that the thermal stability decreased when the down fiber was ground into powder. Differential scanning calorimetry analysis showed that the intensity of the heat‐absorbing peaks of the down powder was lower than that of the down fiber, so the down powder decomposed more readily than the down fiber. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009