Liu Xiaopeng, Chen Zhang, Yang Guang, Zhang Zongtao, Gao Yanfeng
School of Materials Science and Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, China.
School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China.
ACS Omega. 2019 Aug 15;4(9):13896-13901. doi: 10.1021/acsomega.9b01588. eCollection 2019 Aug 27.
Humidity-control materials have attracted increasing attention because of energy savings and smart regulation of indoor comforts. The current research is a successive work to face challenges, such as poor performance, limitations for large-scale production, and surface contamination. Here, we report a smart humidity-control wall-brick manufactured from sepiolite using CaCl as an additive. Low-temperature sintering generated a super hygroscopic interior structure, and further silane modification produced bricks with superhydrophobic surfaces. These superhydrophobic surfaces can promote the moisture storage and prevent the CaCl solution from leaking even after the surface is wiped 100 times. Meanwhile, the superhydrophobic surfaces make the wall-bricks easy to clean; also, these materials possess antifouling and antifungal properties. The 24 h and saturated moisture adsorption-desorption contents reached 630 and 1700 g·m, respectively. Furthermore, a test was performed using model houses in a real environment, which indicates that the wall-bricks can narrow the daily indoor humidity fluctuations by more than 20% in both wet and dry seasons. The white wall-brick can also be dyed with different colors and thus shows promise for applications in interior decorations of houses.
湿度控制材料因其节能和对室内舒适度的智能调节而受到越来越多的关注。当前的研究是一项面对诸如性能不佳、大规模生产限制和表面污染等挑战的后续工作。在此，我们报道一种由海泡石制成的智能湿度控制墙砖，使用氯化钙作为添加剂。低温烧结产生了一种超强吸湿的内部结构，进一步的硅烷改性产生了具有超疏水表面的砖块。这些超疏水表面可以促进水分储存，并且即使在表面擦拭100次后也能防止氯化钙溶液泄漏。同时，超疏水表面使墙砖易于清洁；此外，这些材料具有防污和抗真菌性能。24小时和饱和水分吸附 - 解吸含量分别达到630和1700 g·m 。此外，在实际环境中使用模型房屋进行了测试，结果表明这些墙砖在潮湿和干燥季节都能将室内每日湿度波动缩小超过20%。这种白色墙砖还可以染成不同颜色，因此在房屋室内装饰应用方面显示出前景。
