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Int. J. Mol. Sci. 2016, 17(10), 1600; doi:10.3390/ijms17101600

Protein/CaCO3/Chitin Nanofiber Complex Prepared from Crab Shells by Simple Mechanical Treatment and Its Effect on Plant Growth

1
Graduate School of Engineering, Tottori University, 4-101 Koyama-Cho Minami, Tottori 680-8552, Japan
2
Faculty of Agriculture, Tottori University, 4-101 Koyama-Cho Minami, Tottori 680-8553, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Hitoshi Sashiwa
Received: 1 August 2016 / Revised: 22 August 2016 / Accepted: 14 September 2016 / Published: 22 September 2016
(This article belongs to the Special Issue Chitins 2016)
View Full-Text   |   Download PDF [4132 KB, uploaded 28 September 2016]   |  

Abstract

A protein/CaCO3/chitin nanofiber complex was prepared from crab shells by a simple mechanical treatment with a high-pressure water-jet (HPWJ) system. The preparation process did not involve chemical treatments, such as removal of protein and calcium carbonate with sodium hydroxide and hydrochloric acid, respectively. Thus, it was economically and environmentally friendly. The nanofibers obtained had uniform width and dispersed homogeneously in water. Nanofibers were characterized in morphology, transparency, and viscosity. Results indicated that the shell was mostly disintegrated into nanofibers at above five cycles of the HPWJ system. The chemical structure of the nanofiber was maintained even after extensive mechanical treatments. Subsequently, the nanofiber complex was found to improve the growth of tomatoes in a hydroponics system, suggesting the mechanical treatments efficiently released minerals into the system. The homogeneous dispersion of the nanofiber complex enabled easier application as a fertilizer compared to the crab shell flakes. View Full-Text
Keywords: crab shell; chitin nanofiber; complex; fertilizer crab shell; chitin nanofiber; complex; fertilizer
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MDPI and ACS Style

Aklog, Y.F.; Egusa, M.; Kaminaka, H.; Izawa, H.; Morimoto, M.; Saimoto, H.; Ifuku, S. Protein/CaCO3/Chitin Nanofiber Complex Prepared from Crab Shells by Simple Mechanical Treatment and Its Effect on Plant Growth. Int. J. Mol. Sci. 2016, 17, 1600.

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