Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China.
MIT Media Lab, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.
Adv Mater. 2021 Mar;33(11):e2005569. doi: 10.1002/adma.202005569. Epub 2021 Feb 3.
The rapid development of modern industry and excessive consumption of petroleum-based polymers have triggered a double crisis presenting a shortage of nonrenewable resources and environmental pollution. However, this has provided an opportunity to stimulate researchers to harness native biobased materials for novel advanced materials and applications. Nanocellulose-based aerogels, using abundant and sustainable cellulose as raw material, present a third-generation of aerogels that combine traditional aerogels with high porosity and large specific surface area, as well as the excellent properties of cellulose itself. Currently, nanocellulose aerogels provide a highly attention-catching platform for a wide range of functional applications in various fields, e.g., adsorption, separation, energy storage, thermal insulation, electromagnetic interference shielding, and biomedical applications. Here, the preparation methods, modification strategies, composite fabrications, and further applications of nanocellulose aerogels are summarized, with additional discussions regarding the prospects and potential challenges in future development.
现代工业的迅速发展和石油基聚合物的过度消耗引发了双重危机，既造成了不可再生资源的短缺，又带来了环境污染。然而，这也为研究人员提供了一个机会，促使他们利用本土的生物基材料来开发新型先进材料和应用。以丰富且可持续的纤维素为原料的纳米纤维素气凝胶是第三代气凝胶，它结合了传统气凝胶的高孔隙率和大比表面积，以及纤维素本身的优异性能。目前，纳米纤维素气凝胶为广泛的功能应用提供了一个备受关注的平台，这些应用涉及各个领域，例如吸附、分离、储能、隔热、电磁干扰屏蔽和生物医学应用等。在此，本文总结了纳米纤维素气凝胶的制备方法、改性策略、复合制备以及进一步的应用，并对未来发展的前景和潜在挑战进行了讨论。
