Transparent, Stimuli‐Responsive Films from Cellulose‐Based Organogel Nanoparticles
Transparent, Stimuli‐Responsive Films from Cellulose‐Based Organogel Nanoparticles
复制标题
DOI：
10.1002/adfm.201403067
复制
发表时间：
2015-03
影响因子：
19
通讯作者：
Yonggui Wang;L. Heim;Yeping Xu;G. Buntkowsky;Kai Zhang
中科院分区：
文献类型：
--
作者：
Yonggui Wang;L. Heim;Yeping Xu;G. Buntkowsky;Kai Zhang
生物基纳米纤维素用于构建新型功能材料的应用在过去几年中发展迅速。与大多数从亲水性纳米级纤维素开始的研究相比，本报告使用表面硬脂酰化纤维素纳米颗粒（SS-CNP）构建多功能响应性薄膜。在非均相条件下对纤维素进行表面改性后，获得平均尺寸为115 ± 0.5 nm的SS-CNP。根据固态13 C核磁共振（NMR）光谱，结晶纤维素核心存在于SS-CNP中。SS-CNP在非极性溶剂中表现出优异的溶解性，并在低温下或在室温下长时间储存后在四氢呋喃（THF）中形成温度响应性有机凝胶。此外，来自其THF悬浮液的SS-CNP的透明和自立膜显示溶剂响应性表面润湿性和响应性形状记忆特性。SS-CNP也可与非极性化合物（如（2-硬脂酰氨基乙基）罗丹明B）一起用于制备纳米复合膜。因此，这些来自可持续纤维素纤维的新型SS-CNP是构建新型功能材料的有希望的候选者。
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 13C 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.