A Comparative Study on Properties of Cellulose/Antarctic Krill Protein Composite Fiber by Centrifugal Spinning and Wet Spinning

Cellulose/antarctic krill protein (C/AKP) composite fibers are successfully prepared by centrifugal spinning. The main purpose of this paper is to compare the properties of C/AKP composite fibers prepared by centrifugal spinning and wet spinning. The hydrogen bond type, break strength, morphology, crystallinity, and thermal stability are analyzed by Fourier transform infrared spectroscopy, electronic single silk strength testing, X-ray diffraction, scanning electron microscopy, and differential scanning calorimetry. The results show that the C/AKP composite fibers contain intramolecular hydrogen bonds (OH-OH and annular polymer bonds) and intermolecular hydrogen bonds (OH-π, OH-ether O, and OH-N). The centrifugal spinning composite fibers have a higher percentage of intermolecular hydrogen bonds, a higher break strength, and higher crystallinity than the wet spinning fibers. The wet spinning composite fibers have a more obvious groove structure and a higher degree of swelling than the centrifugally spun fibers.