Roll-to-roll fabrication of touch-responsive cellulose photonic laminates.
Roll-to-roll fabrication of touch-responsive cellulose photonic laminates.
复制标题
DOI：
10.1038/s41467-018-07048-6
复制
发表时间：
2018-11-06
影响因子：
16.6
通讯作者：
Vignolini S
中科院分区：
文献类型：
--
作者：
Liang HL;Bay MM;Vadrucci R;Barty-King CH;Peng J;Baumberg JJ;De Volder MFL;Vignolini S
羟丙基纤维素 (HPC) 是天然丰富的纤维素的衍生物，可以自组装成螺旋纳米结构，从而通过布拉格反射产生引人注目的着色。螺旋周期性对压力非常敏感，使 HPC 成为响应性光子材料。迄今为止，在阐明这些 HPC 机械致色特性方面取得的最新进展还没有提供多少实际应用，这需要扩大制造规模并对其颜色变化进行数字转换。在这里，我们展示使用连续涂层和封装的卷对卷制造的米级 HPC 层压板。我们使用人眼和数字成像感知的压力引起的色调变化的光学分析来量化封装 HPC 的压力响应。最后，我们展示了捕获 HPC 层压板上人体足迹的实时压力分布和时间演变的能力。这是首次展示大面积且经济高效的 HPC 刺激响应光子薄膜制造方法，该薄膜可以生成可用标准相机读取的压力图。自组装结构通常在控制良好的实验室环境下进行小规模演示。在这里，作者提出了一种连续制造平方米自组装纤维素基机械变色薄膜的卷对卷工艺，并演示了实时记录脚印产生的压力分布。
Hydroxypropyl-cellulose (HPC), a derivative of naturally abundant cellulose, can self-assemble into helical nanostructures that lead to striking colouration from Bragg reflections. The helical periodicity is very sensitive to pressure, rendering HPC a responsive photonic material. Recent advances in elucidating these HPC mechano-chromic properties have so-far delivered few real-world applications, which require both up-scaling fabrication and digital translation of their colour changes. Here we present roll-to-roll manufactured metre-scale HPC laminates using continuous coating and encapsulation. We quantify the pressure response of the encapsulated HPC using optical analyses of the pressure-induced hue change as perceived by the human eye and digital imaging. Finally, we show the ability to capture real-time pressure distributions and temporal evolution of a human foot-print on our HPC laminates. This is the first demonstration of a large area and cost-effective method for fabricating HPC stimuli-responsive photonic films, which can generate pressure maps that can be read out with standard cameras. Self-assembled structures are typically demonstrated on small scales under well-controlled lab environments. Here, the authors present a roll-to-roll process for the continuous manufacturing of square-meters of self-assembled cellulose-based mechano-chromic films and demonstrate the recording of pressure profiles generated by foot-imprints in real time.
登录
查看更多内容
影响因子：
29.4
作者：
Finlayson, Chris E.;Spahn, Peter;Baumberg, Jeremy J.
通讯作者：
Baumberg, Jeremy J.
影响因子：
29.4
作者：
Kim, Do Hyun;Yoo, Hyeon Gyun;Lee, Keon Jae
通讯作者：
Lee, Keon Jae
影响因子：
3.9
作者：
Li, Xue;Gilchrist, James F.
通讯作者：
Gilchrist, James F.
影响因子：
3.5
作者：
Leppaniemi, Jaakko;Mattila, Tomi;Alastalo, Ari
通讯作者：
Alastalo, Ari
影响因子：
4.6
作者：
Geng Y;Noh J;Drevensek-Olenik I;Rupp R;Lenzini G;Lagerwall JP
通讯作者：
Lagerwall JP