Direct Ink Write 3D Printed Cellulose Nanofiber Aerogel Structures with Highly Deformable, Shape Recoverable, and Functionalizable Properties
Direct Ink Write 3D Printed Cellulose Nanofiber Aerogel Structures with Highly Deformable, Shape Recoverable, and Functionalizable Properties
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DOI：
10.1021/acssuschemeng.7b03439
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发表时间：
2018-02-01
影响因子：
8.4
通讯作者：
Qi, H. Jerry
中科院分区：
文献类型：
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作者：
Li, Vincent C. F.;Mulyadi, Arie;Qi, H. Jerry
纤维素气凝胶最近取得了广泛的进展，但由于缺乏可重复定制的气凝胶整体3D结构，限制了它们适应不同应用要求的能力。在本文中，高压均质和2,2,6,6-四甲基-1-胡椒酰氧基（TEMPO）改性的纤维素纳米纤维（T-CNF）使用直接墨水写入（DIW）打印成可定制的3D结构。经过冷冻干燥和交联，获得了高度可变形和形状可恢复的T-CNF气凝胶三维结构。3D打印部件的孔隙率为98%，密度为26 mg/cm(3)。由于其可持续性、生物相容性、超轻、高孔隙率和可变形性，所得气凝胶在隔热、冲击/振动阻尼和组织工程方面具有巨大的应用潜力。此外，3D打印的T-CNF气凝胶被模板化以赋予疏水性和机电性能。合成的气凝胶在油水分离和电子相关应用方面具有潜力。
Recent advancements in cellulosic aerogels have been extensive, but the lack of reproducible customization over the aerogel's overall 3D structure has limited their ability to adapt to different application requirements. In this paper, high pressure homogenization and 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) modified cellulose nanofiber (T-CNF) was printed using direct-ink-write (DIW) into customizable 3D structures. After freeze-drying and cross-linking, highly deformable and shape recoverable T-CNF aerogel 3D structures were obtained. The 3D printed parts have a porosity of 98% and density of 26 mg/cm(3). Due to their sustainability, biocompatibility, ultralight weight with high porosity, and deformability, the resultant aerogels have great potential for applications in thermal insulation, shock/vibration damping, and tissue engineering. In addition, the 3D printed T-CNF aerogels were templated to impart hydrophobicity and electromechanical properties. The resultant aerogels demonstrated potential for oil/water separation, and electronic related applications.