School of Mechanical and Materials Engineering and ‡The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University , Pullman, Washington 99164, United States.
ACS Appl Mater Interfaces. 2017 Jul 12;9(27):22846-22855. doi: 10.1021/acsami.7b05796. Epub 2017 Jun 27.
Development of high-performance nanomaterials with not only strong ability to trap the pollutants but also good structure stability under varying environmental conditions is a critical need for air-filtration applications. However, it has been very challenging for a filtering material to simultaneously realize multifunctional air filtration and good environmental stability. Here, based on our previous studies on protein-based nanofilters, we report a cross-linked protein nanofabric to address this challenging issue. It is found that cross-linked protein nanofabrics can significantly improve the structure stability against different moisture levels and temperatures, while maintaining the multifunctional filtration performance. Moreover, it is demonstrated that the cross-linked protein nanomaterials also possess antibacterial properties, such as Shewanella oneidensis bacteria, further improving the environmental stability. The effects of cross-linking with different loadings of cross-linking agent on the structure stability and filtration performance are further investigated at different humidity levels and temperatures. This study provides a cost-effective solution for advanced "green" nanomaterials with excellent performance in both filtration functions and structure stability under varying environment.
开发具有强污染物捕获能力和良好结构稳定性的高性能纳米材料，是空气过滤应用的关键需求。然而，对于过滤材料来说，同时实现多功能空气过滤和良好的环境稳定性一直是极具挑战性的。在这里，基于我们之前在基于蛋白质的纳米滤器上的研究，我们报告了一种交联蛋白质纳米纤维来解决这个具有挑战性的问题。研究发现，交联蛋白质纳米纤维可以显著提高对不同湿度水平和温度的结构稳定性，同时保持多功能过滤性能。此外，还证明交联蛋白质纳米材料还具有抗菌性能，如希瓦氏菌属，进一步提高了环境稳定性。进一步研究了不同交联剂负载量的交联对不同湿度水平和温度下结构稳定性和过滤性能的影响。本研究为具有优异过滤功能和在不同环境下结构稳定性的先进“绿色”纳米材料提供了一种具有成本效益的解决方案。
