Li Shuang, Cui Boyu, Xie Hao, Jia Xue, Hao Shuo, Wang Weihong
Key Laboratory of Bio-Based Material Science and Technology (Ministry of Education), Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China.
ACS Appl Mater Interfaces. 2022 Sep 21;14(37):42522-42530. doi: 10.1021/acsami.2c12561. Epub 2022 Sep 9.
Light-management materials play a great significant role in efficient-energy buildings because they reduce indoor energy consumption by adjusting to natural sunlight, enhancing heat insulation, and creating comfortable indoor lighting. Here, we fabricated an ecofriendly and sustainable lignocellulose-based light-management film via a facile homogenization and mechanical hot-pressing method without complicated treatment or toxic reagents. The resulting film exhibited a favorable ultraviolet (UV) blocking performance of 82.25% for UVA, high visible light transmittance, and high haze, with a desirable tensile strength of 197 MPa, which was significantly higher than those of most petroleum-based plastics. Accordingly, the film was further endowed with near-infrared absorption performance by spray-coating with lanthanum hexaboride (LaB) nanoparticles─there were almost no adverse effects on its light transmittance or mechanical strength. Meanwhile, the high haze of the film implied that it met the requirement for privacy protection in smart buildings. The MFC/lignin/LaB composite film has potential applications in energy-saving buildings and optoelectronic devices.
光管理材料在高效节能建筑中发挥着极其重要的作用，因为它们通过适应自然阳光、增强隔热性能和营造舒适的室内照明来降低室内能源消耗。在此，我们通过简便的均质化和机械热压方法制备了一种环保且可持续的木质纤维素基光管理薄膜，无需复杂处理或使用有毒试剂。所得薄膜对UVA的紫外线（UV）阻挡性能良好，达82.25%，具有高可见光透射率和高雾度，其拉伸强度为197MPa，令人满意，显著高于大多数石油基塑料。因此，通过用六硼化镧（LaB）纳米颗粒进行喷雾涂层，该薄膜进一步具备了近红外吸收性能，且对其透光率或机械强度几乎没有不利影响。同时，薄膜的高雾度表明它满足智能建筑中隐私保护的要求。MFC/木质素/LaB复合薄膜在节能建筑和光电器件方面具有潜在应用。
