Transparent and Flexible Nacre‐Like Hybrid Films of Aminoclays and Carboxylated Cellulose Nanofibrils,Advanced Functional Materials

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Transparent and Flexible Nacre‐Like Hybrid Films of Aminoclays and Carboxylated Cellulose Nanofibrils
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2017-09-08 , DOI: 10.1002/adfm.201703277
Yingxin Liu _{1,

2} , Shu-Hong Yu ₃ , Lennart Bergström _{1,

2}

Affiliation

Nacre and other biological composites are important inspirations for the design and fabrication of multifunctional composite materials. Transparent, strong, and flexible hybrid films of aminoclays (AC) and carboxylated cellulose nanofibrils (CNF) with a nacre‐like microstructure at AC contents up to 60 wt% are prepared. The high transmittance of visible light is attributed to the high homogeneity of the hybrid films and to the relatively small refractive index contrast between the CNF‐based matrix and synthetic AC. The strength and strain to failure of the hybrids are significantly higher than biogenic nacre and other nacre‐mimicking nanocellulose‐based materials, e.g., montmorillonite‐CNF and graphene oxide‐CNF composite films. The excellent mechanical properties are related to the ionic bonds between the negatively charged carboxylic groups on the CNF and the positively charged amine groups on the AC nanoparticles. This work illustrates the significance of tailoring the interactions between small clay particles and biopolymers in multifunctional materials with potential applications as printable barrier coatings and substrates for optoelectronics.

中文翻译：

透明和灵活的类似氨纶和羧化纤维素纳米原纤维的杂化膜

珍珠母和其他生物复合材料是多功能复合材料设计和制造的重要灵感。制备了透明，强韧且柔韧性的氨基粘土（AC）和羧化纤维素纳米原纤维（CNF）的杂化膜，其微珠状微结构的AC含量最高为60 wt％。可见光的高透射率归因于杂化膜的高均匀性，以及基于CNF的基体和合成AC之间相对较小的折射率对比。杂种的强度和破坏力显着高于生物珍珠质和其他类似珍珠质的纳米纤维素基材料，例如蒙脱土-CNF和氧化石墨烯-CNF复合膜。优异的机械性能与CNF上带负电荷的羧基与AC纳米颗粒上带正电荷的胺基之间的离子键有关。这项工作说明了调整多功能材料中小粘土颗粒与生物聚合物之间相互作用的重要性，并具有潜在的应用前景，如可印刷的阻隔涂层和光电基板。

更新日期：2017-09-08

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