Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China.
Carbohydr Polym. 2015 Dec 10;134:144-50. doi: 10.1016/j.carbpol.2015.07.083. Epub 2015 Aug 5.
With the increasing emphasis on green chemistry, it is becoming more important to develop environmentally friendly matrix materials for the synthesis of nanocomposites. Cellulose aerogels with hierarchical micro/nano-scale three-dimensional network beneficial to control and guide the growth of nanoparticles, are suitable as a class of ideal green nanoparticles hosts to fabricate multifunctional nanocomposites. Herein, a facile oxidative co-precipitation method was carried out to disperse CoFe2O4 nanoparticles in the cellulose aerogels matrixes, and the cellulose aerogels were prepared from the native wheat straw based on a green NaOH/polyethylene glycol solution. The mean diameter of the well-dispersed CoFe2O4 nanoparticles in the hybrid aerogels is 98.5 nm. Besides, the hybrid aerogels exhibit strong magnetic responsiveness, which could be flexibly actuated by a small magnet. And this feature also makes this class of magnetic aerogels possibly useful as recyclable adsorbents and some magnetic devices. Meanwhile, the mild green preparation method could also be extended to fabricate other miscellaneous cellulose-based nanocomposites.
随着绿色化学的重视程度不断提高，开发用于合成纳米复合材料的环保基质材料变得越来越重要。具有分级微/纳尺度三维网络的纤维素气凝胶有利于控制和引导纳米颗粒的生长，是一类理想的绿色纳米颗粒主体，可用于制备多功能纳米复合材料。在此，采用简便的氧化共沉淀法将 CoFe2O4 纳米颗粒分散在纤维素气凝胶基质中，并且基于绿色的 NaOH/聚乙二醇溶液，由天然麦草制备纤维素气凝胶。在杂化气凝胶中均匀分散的 CoFe2O4 纳米颗粒的平均直径为 98.5nm。此外，杂化气凝胶表现出较强的磁响应性，可以通过小磁铁进行灵活的驱动。这一特性还使这类磁性气凝胶可能作为可回收吸附剂和一些磁性器件使用。同时，温和的绿色制备方法也可以扩展到制备其他纤维素基纳米复合材料。
