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Transparent, Stimuli-Responsive Films from Cellulose-Based Organogel Nanoparticles

机译：基于纤维素的有机凝胶纳米粒子的透明，刺激响应膜。

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摘要

The use of bio-based nanoscaled cellulose for the construction of novel functional materials has progressed rapidly over the past years. In comparison to most of studies starting with the hydrophilic nanoscaled cellulose, surface-stearoylated cellulose nanoparticles (SS-CNPs) are used in this report for the construction of multifunctional, responsive films. SS-CNPs with an average size of 115 ±0.5 nm are obtained after the surface-modification of cellulose under heterogeneous conditions. Crystalline cellulose core is present within SS-CNPs according to solid-state ~(13)C nuclear magnetic resonance (NMR) spectroscopy. SS-CNPs show excellent dispersibility in nonpolar solvents and form temperature-responsive organogels in tetrahydrofuran (THF) at low temperature or after long time storage at room temperature. Moreover, transparent and self-standing films of SS-CNPs from their THF-suspension show solvent-responsive surface wettability and responsive shape-memory property. SS-CNPs can also be used for the fabrication of nanocomposite films together with nonpolar compounds, such as (2-stearoylaminoethyl) rhodamine B. Thus, these novel SS-CNPs derived from sustainable cellulose fibers are promising candidates for the construction of novel functional materials.
机译：在过去的几年中，基于生物的纳米级纤维素在新型功能材料上的应用已迅速发展。与大多数从亲水纳米级纤维素开始的研究相比，本报告中使用表面硬脂酰化纤维素纳米颗粒（SS-CNPs）来构建多功能，响应性薄膜。在异质条件下对纤维素进行表面改性后，可获得平均粒径为115±0.5 nm的SS-CNP。根据固态〜（13）C核磁共振（NMR）光谱，SS-CNP中存在结晶纤维素核。 SS-CNPs在非极性溶剂中显示出极好的分散性，并且在低温下或在室温下长时间保存后，会在四氢呋喃（THF）中形成温度响应型有机凝胶。此外，SS-CNPs的THF悬浮液透明且自立的膜显示出溶剂响应性的表面润湿性和响应性的形状记忆特性。 SS-CNPs还可以与非极性化合物（例如（2-硬脂酰氨基乙基）若丹明B）一起用于制造纳米复合膜。因此，这些源自可持续纤维素纤维的新型SS-CNPs有望用于构建新型功能材料。

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  • 来源
    《Advanced Functional Materials》 |2015年第9期|1434-1441|共8页
  • 作者

    Yonggui Wang; Lars-Oliver Heim; Yeping Xu; Gerd Buntkowsky; Kai Zhang;

  • 作者单位

    Ernst-Berl-Institute for Chemical Engineering and Macromolecular Science Technische Universitaet Darmstadt Alarich-Weiss-Str. 8, D-64287 Darmstadt, Germany;

    Center of Smart Interfaces Technische Universitaet Darmstadt Alarich-Weiss-Strasse 10, D-64287 Darmstadt, Germany;

    Eduard-Zintl-Institute for Inorganic Chemistry and Physical Chemistry Technische Universitaet Darmstadt Alarich-Weiss-Strasse 4 D-64287 Darmstadt, Germany;

    Eduard-Zintl-Institute for Inorganic Chemistry and Physical Chemistry Technische Universitaet Darmstadt Alarich-Weiss-Strasse 4 D-64287 Darmstadt, Germany;

    Ernst-Berl-Institute for Chemical Engineering and Macromolecular Science Technische Universitaet Darmstadt Alarich-Weiss-Str. 8, D-64287 Darmstadt, Germany;

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