Bioinspired Environmentally Friendly Amorphous CaCO3-Based Transparent Composites Comprising Cellulose Nanofibers
Bioinspired Environmentally Friendly Amorphous CaCO3-Based Transparent Composites Comprising Cellulose Nanofibers
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DOI：
10.1021/acsomega.8b02014
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发表时间：
2018-10-01
期刊：
影响因子：
4.1
通讯作者：
Kato, Takashi
中科院分区：
文献类型：
--
作者：
Kuo, David;Nishimura, Tatsuya;Kato, Takashi
由酸性大分子稳定的无定形碳酸钙（ACC）是开发环保复合材料的有用材料。在这项研究中，我们通过加入水分散性纤维素衍生物，即羧甲基纤维素（CMC）和表面改性的结晶纤维素纳米纤维（CNF），合成了透明且机械坚韧的ACC基复合材料。目前的工作中使用的溶液混合方法被证明是生产机械坚韧且环境友好的材料的一种强大而有效的方法。羧基和 Ca2+ 离子之间的分子尺度相互作用导致 CNF 在复合材料中均匀分散，从而使复合薄膜具有高透明度和高机械性能。 CMC、CNF 和 ACC 的混合比例为 40、40 和 20 wt% 的复合薄膜表现出杨氏模量 15.8 +/- 0.93 GPa 和拉伸强度 268 +/- 20 MPa 的高机械性能。这些基于 ACC 设计的材料可能会在需要使用环保、可生物降解、机械坚韧和透明复合材料的许多领域的应用中开辟新的机会。
Amorphous calcium carbonate (ACC) stabilized by acidic macromolecules is a useful material for the development of environmentally friendly composites. In this study, we synthesized transparent and mechanically tough ACC-based composite materials by the incorporation of water-dispersible cellulose derivatives, namely, carboxymethyl cellulose (CMC) and surface-modified crystalline cellulose nanofibers (CNFs). A solution mixing method used in the present work proved to be a powerful and efficient inethod for the production of mechanically tough and environmentally friendly materials. Molecular-scale interactions between carboxyl groups and Ca2+ ions induce homogeneous dispersion of CNFs in the composites, and this gives composite films with high transparency and high mechanical properties. The composite films of CMC, CNFs, and ACC at the mixture ratios of 40, 40, and 20 wt %, showed high mechanical properties of 15.8 +/- 0.93 GPa for the Young's modulus and 268 +/- 20 MPa for the tensile strength. These designed materials that are based on ACC may open up new opportunities in many fields in applications that require the use of environmentally friendly, biodegradable, mechanically tough, and transparent composite materials.