Study of the structural properties and degradation of coated wood with polydopamine/hydroxyapatite/chitosan hybrid nanoc
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ORIGINAL RESEARCH
Study of the structural properties and degradation of coated wood with polydopamine/hydroxyapatite/chitosan hybrid nanocomposite in seawater Narges Esfandiar . Fatemeh Elmi . Shila Omidzahir
Received: 3 March 2020 / Accepted: 25 June 2020 Springer Nature B.V. 2020
Abstract Increasing environmental concerns and increasing demands for reproducible natural resources have made wood a viable option for use in various industries, particularly the marine industry. In this study, the wood was treated with three coatings, and then its biodegradability in the marine environment was investigated. The first coating, inspired secreted substance from bivalve mollusks called dopamine was used, which has the ability to adhere to different surfaces. The second coating, hydroxyapatite crystals were formed by immersion of treated wood for 14 days in simulated body fluid (SBF) 9 1.5 solutions. Extracted chitosan from shrimp waste was used for the third layer. The contact angle (CA) of the
treated wood with polydopamine/hydroxyapatite/chitosan showed 130. The results of FT-IR, XRD, and FE-SEM confirmed the layers on the surface of the wood. In the next step, control and treated woods were exposed to seawater for 6 months. The results showed that the control woods had more color variations than the treated woods with more swelling, more infestation of barnacles. The results of FT-IR and XRD showed that structures of lignin, cellulose, and hemicelluloses of the control wood were more demolished than those of treated wood after immersion in seawater.
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10570-020-03324-1) contains supplementary material, which is available to authorized users. N. Esfandiar F. Elmi (&) Department of Marine Chemistry, Faculty of Marine & Oceanic Sciences, University of Mazandaran, Babolsar, Iran e-mail: [email protected] S. Omidzahir Department of Marine Biology, Faculty of Marine & Oceanic Sciences, University of Mazandaran, Babolsar, Iran
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Cellulose
Graphic abstract
Keywords Wood Polydopamine Hydroxyapatite Chitosan Biodegradability
Introduction The use of reproducible sources in the short and even long term leads to environmental pollution and subsequently endangers human health. Due to the unprecedented population growth and scarcity of resources, environmental protection has become a vital issue. Wood is one of these natural resources. Wood products are used as the main resources for sustainable environmental development (Marchi et al. 2018). This natural resource is biologically innoxious, easily accessible, and inexpensive. It has played a significant role in human history as a reproducible and recyclable raw material (Wan et al. 2014; Yang and Jaakkola 2011).Wood is one of the abundant polymeric biomaterials which is commonly used. Due to its high potentials, including favorable mechanical strength and thermal flexibility properties, it is used in many industries (Sandb
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