College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China.
Carbohydr Polym. 2013 Jan 30;92(1):90-7. doi: 10.1016/j.carbpol.2012.09.084. Epub 2012 Oct 6.
Antarctic krill (Euphausia superba) has been widely studied and extensively recognized as a target for commercial fishing. In this study, Antarctic krill chitin was extracted from defatted Antarctic krill shell, and its crystalline structure and thermal properties were characterized by employing Fourier transform infrared spectroscopy, X-ray diffractometry, scanning electron microscopy, thermogravimetry, and differential scanning calorimetry. Results showed that Antarctic krill chitin corresponded to the α-polymorph, and was composed of small, stable, and uniform microcrystals. The degree of N-deacetylation was 11.28 ± 0.86%. The d-spacings of Antarctic krill chitin were 9.78 Å and 4.63 Å at (020) and (110) planes. The crystalline sizes were 6.07 nm and 5.16 nm at (020) and (110) planes, respectively. The activation energy of the polysaccharide chain decomposition was 123.35 kJ/mol and the glass transition (T(g)) of Antarctic krill chitin was 164.96 °C.
南极磷虾（Euphausia superba）已被广泛研究，并被广泛认为是商业捕捞的目标。在这项研究中，从脱脂南极磷虾壳中提取了南极磷虾壳聚糖，并通过傅里叶变换红外光谱、X 射线衍射、扫描电子显微镜、热重分析和差示扫描量热法对其结晶结构和热性能进行了表征。结果表明，南极磷虾壳聚糖与 α-多晶型物相对应，由小、稳定且均匀的微晶组成。N-脱乙酰度为 11.28±0.86%。南极磷虾壳聚糖在（020）和（110）晶面的 d 间距分别为 9.78 Å 和 4.63 Å。（020）和（110）晶面的结晶度分别为 6.07nm 和 5.16nm。多糖链分解的活化能为 123.35kJ/mol，南极磷虾壳聚糖的玻璃化转变温度（T(g)）为 164.96°C。
