基于柔性纤维素纳米晶体的生物纳米复合材料薄膜作为一种对湿度响应的智能光子材料。
Flexible cellulose nanocrystal-based bionanocomposite film as a smart photonic material responsive to humidity.
机构信息
Department of Food Science and Agricultural Chemistry, Faculty of Agricultural and Environmental Sciences, McGill University, Sainte-Anne-de-Bellevue, QC H9X 3V9, Canada; Food, Nutrition and Health Program, Faculty of Land and Food Systems, The University of British Columbia, Vancouver, BC V6T 1Z4, Canada.
Department of Food Science and Agricultural Chemistry, Faculty of Agricultural and Environmental Sciences, McGill University, Sainte-Anne-de-Bellevue, QC H9X 3V9, Canada.
出版信息
Int J Biol Macromol. 2021 Oct 1;188:385-390. doi: 10.1016/j.ijbiomac.2021.08.049. Epub 2021 Aug 11.
A flexible bionanocomposite film with a visible structural color was developed by co-assembling cellulose nanocrystals with glycerol, glucose, and poly(vinyl alcohol), and its application as a photonic humidity-responsive material was investigated. This chiral nematic film exhibited an indigo, cyan, olive green, orange, pink, and transparent color when exposed to relative humidity of 33%, 75%, 85%, 89%, 96%, and 100%, respectively. The color change was caused by reversible change in chiral nematic pitch due to hydration and dehydration. The nanocomposite displayed a stable structural color after alternatively conditioned at 33% and 100% relative humidity for ten cycles. Notably, material cost for a piece of such a smart film with an area of 28 cm is less than $0.1 USD. This flexible, uniform bionanocomposite film has great potential to be used as a smart photonic material responsive to humidity.
一种具有可见结构色的柔性生物纳米复合膜是通过将纤维素纳米晶体与甘油、葡萄糖和聚乙烯醇共组装而成的，研究了其作为光子湿度响应材料的应用。当暴露于相对湿度为 33%、75%、85%、89%、96%和 100%时，这种手性向列膜分别呈现出靛蓝、青色、橄榄绿、橙色、粉色和透明色。颜色变化是由于水合和去水合导致手性向列间距的可逆变化引起的。纳米复合材料在 33%和 100%相对湿度下交替调节十次后仍显示出稳定的结构色。值得注意的是，这样一块面积为 28 平方厘米的智能膜的材料成本不到 0.1 美元。这种灵活、均匀的生物纳米复合膜具有很大的潜力，可作为一种对湿度有响应的智能光子材料。
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