High Performance, Fully Bio-Based, and Optically Transparent Wood Biocomposites,Advanced Science

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High Performance, Fully Bio-Based, and Optically Transparent Wood Biocomposites
Advanced Science ( IF 14.3 ) Pub Date : 2021-05-02 , DOI: 10.1002/advs.202100559
Céline Montanari ₁ , Yu Ogawa ₂ , Peter Olsén ₁ , Lars A Berglund ₁

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The sustainable development of engineering biocomposites has been limited due to a lack of bio-based monomers combining favorable processing with high performance. Here, the authors report a novel and fully bio-based transparent wood biocomposite based on green synthesis of a new limonene acrylate monomer from renewable resources. The monomer is impregnated and readily polymerized in a delignified, succinylated wood substrate to form optically transparent biocomposites. The chemical structure of the limonene acrylate enables diffusion into the cell wall, and the polymer phase is both refractive index-matched and covalently linked to the wood substrate. This results in nanostructured biocomposites combining an excellent optical transmittance of 90% at 1.2 mm thickness and a remarkably low haze of 30%, with a high mechanical performance (strength 174 MPa, Young's modulus 17 GPa). Bio-based transparent wood holds great potential towards the development of sustainable wood nanotechnologies for structural applications, where transparency and mechanical performance are combined.

中文翻译：

高性能、全生物基、光学透明的木材生物复合材料

由于缺乏兼具良好加工性和高性能的生物基单体，工程生物复合材料的可持续发展受到限制。在这里，作者报告了一种新型的、完全生物基的透明木材生物复合材料，其基于从可再生资源绿色合成新型柠檬烯丙烯酸酯单体。该单体在脱木素、琥珀酰化的木材基材中浸渍并容易聚合，形成光学透明的生物复合材料。柠檬烯丙烯酸酯的化学结构能够扩散到细胞壁中，并且聚合物相既折射率匹配又与木材基材共价连接。由此产生的纳米结构生物复合材料结合了 1.2 毫米厚度下 90% 的优异光学透射率和 30% 的极低雾度，以及高机械性能（强度 174 MPa，杨氏模量 17 GPa）。生物基透明木材在开发用于结构应用的可持续木材纳米技术方面具有巨大潜力，其中透明度和机械性能相结合。

更新日期：2021-06-24

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