Journal
CARBOHYDRATE POLYMERS
Volume 142, Issue -, Pages 275-281Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2016.01.050
Keywords
Sodium alginate; The Antarctic krill protein; Hydrogen bond; Derivative infrared spectra; Composite fiber
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Funding
- National Natural Science Foundation of China [51373027]
- National Science Foundation of Liaoning [2015020221]
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Sodium alginate/Antarctic krill protein composite material (SA/AKP) was successfully obtained by blending method. The hydrogen bonds of SA/AKP composite material were analyzed by Fourier transform infrared spectroscopy (FT-IR) and Nuclear magnetic resonance hydrogen spectrum (HNMR). Experiment manifested the existence of intermolecular and intramolecular hydrogen bonds in SA/AKP system; strength of intermolecular hydrogen bond enhanced with the increase of AKP in the composite material and the interaction strength of hydrogen bonding followed the order: OH... Ether 0 > OH...pi > OH...N. The percentage of intermolecular hydrogen bond decreased with increase of pH. At the same time, the effect of hydrogen bonds on properties of the composite material was discussed. The increase of intermolecular hydrogen bonding led to the decrease of crystallinity, increase of apparent viscosity and surface tension, as well as obvious decrease of heat resistance of SA/AKP composite material. SA/ARP fiber SEM images and energy spectrum showed that crystallized salt was separated from the fiber, which possibly led to the fibrillation of the composite fibers. (C) 2016 Elsevier Ltd. All rights reserved.
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