To efficiently utilize waste marine arthropod materials, α-chitin nanofibers (α-NCF) and α-chitin aerogel (NCA) were prepared from discarded crab shells via ultrasonic method combined with pre-chemical treatment. The morphological features, crystalline characteristics, chemical structures, and specific surface area of the as-prepared materials were characterized by field emission electron microscopy (FE-SEM), X-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR) and BET method. The results showed that the diameter of the obtained chitin nanofibers was evenly about 20 nm with cross-linked thread-like structures. It was confirmed from FTIR spectra that the natural chitin/protein/mineral composites in the crab shells have been completely removed through the chemical treatment. The prepared α-NCF possess a high crystallinity of 85.4%. Meanwhile, the freezing-dried chitin aerogel has flexibility as well as a relatively high BET of 133 m2/g.
LU Yun
,
XIAO Shaoliang
,
GAO Runan
,
SUN Qingfeng
,
LI Jian
. Preparation of α-Chitin Nanofiber and Chitin Aerogel via Ultrasonic Method[J]. Science & Technology Review, 2014
, 32(4-5)
: 61
-64
.
DOI: 10.3981/j.issn.1000-7857.2014.h1.009
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