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) × 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.

Graphic abstract

中文翻译：

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聚多巴胺/羟基磷灰石/壳聚糖杂化纳米复合材料在海水中涂层木材的结构性能和降解研究

摘要

越来越多的环境关注和对可再生自然资源的日益增长的需求已使木材成为在各种行业（尤其是海洋行业）中使用的可行选择。在这项研究中，木材经过三层涂层处理，然后研究了其在海洋环境中的生物降解性。使用了第一层涂料，这种物质是由双壳类软体动物中受启发的分泌物质，称为多巴胺，具有附着在不同表面上的能力。通过将处理过的木材在模拟体液（SBF）×1.5溶液中浸泡14天，形成第二层羟基磷灰石晶体。从虾粪中提取的壳聚糖用于第三层。处理后的木材与聚多巴胺/羟基磷灰石/壳聚糖的接触角（CA）为130°。FT-IR，XRD，FE-SEM证实了木材表面的层数。在下一步中，将对照和处理过的木材暴露于海水中6个月。结果表明，对照木材比经处理的木材具有更多的颜色变化，且溶胀更大，藤壶的侵扰更大。FT-IR和XRD的结果表明，对照木材的木质素，纤维素和半纤维素的结构比浸泡在海水中的处理过的木材的破坏程度更大。

图形摘要