Responsive Mesoporous Photonic Cellulose Films by Supramolecular Cotemplating
Responsive Mesoporous Photonic Cellulose Films by Supramolecular Cotemplating
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DOI：
10.1002/anie.201402214
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发表时间：
2014-08-18
影响因子：
16.6
通讯作者：
MacLachlan, Mark J.
中科院分区：
文献类型：
--
作者：
Giese, Michael;Blusch, Lina K.;MacLachlan, Mark J.
以纤维素为基础的材料对人类来说一直是并将继续是特别重要的。考虑到纤维素的生物利用度和社会相关性，将这种可再生资源转化为活性材料是迈向可持续发展的关键一步。在这里，我们报道了一种新形式的纤维素衍生材料，它结合了可调的光子性质和独特的介孔结构，这是由一种新的超分子共模板方法产生的。纤维素纳米晶与尿素-甲醛树脂的复合材料形成了手性向列型组装，碱处理后得到手性向列型脱硫化纤维素纳米晶的介孔连续体。介孔光子纤维素(MPC)薄膜在溶胀后会发生快速和可逆的颜色变化，可用于压力传感。这些新型活性介孔纤维材料在生物传感、光学、功能膜、手性分离和组织工程等领域具有潜在的应用前景。
Cellulose-based materials have been and continue to be exceptionally important for humankind. Considering the bioavailability and societal relevance of cellulose, turning this renewable resource into an active material is a vital step towards sustainability. Herein we report a new form of cellulose-derived material that combines tunable photonic properties with a unique mesoporous structure resulting from a new supramolecular cotemplating method. A composite of cellulose nanocrystals and a urea-formaldehyde resin organizes into a chiral nematic assembly, which yields a chiral nematic mesoporous continuum of desulfated cellulose nanocrystals after alkaline treatment. The mesoporous photonic cellulose (MPC) films undergo rapid and reversible changes in color upon swelling, and can be used for pressure sensing. These new active mesoporous cellulosic materials have potential applications in biosensing, optics, functional membranes, chiral separation, and tissue engineering.