Functional Nanomaterials Laboratory, Center for Micro/Nanomaterials and Technology, and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Zhongguancundonglu 29, Haidianqu, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Functional Nanomaterials Laboratory, Center for Micro/Nanomaterials and Technology, and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Zhongguancundonglu 29, Haidianqu, Beijing 100190, China.
J Colloid Interface Sci. 2019 Mar 22;540:107-114. doi: 10.1016/j.jcis.2019.01.008. Epub 2019 Jan 4.
Dual-functional films with both antifogging and antibacterial properties have a wide range of applications on the surface of transparent materials. However, few studies have been reported so far about such dual-functional films. In this work, we developed self-healing poly(vinyl alcohol)/poly(acrylic acid)/Ag (polymer-Ag) composite films simultaneously with antifogging and antibacterial properties via a simple one-pot strategy. The antifogging property is attributed to sufficient hydroxyl groups of polymer. Ag nanoparticles obtained through thermal treatment were homogeneously distributed in the transparent composite films, and could inhibit the growth and lead to the death of bacteria such as E. coli. Polymer crosslinking and introduction of inorganic nanomaterial endowed the composite films with high mechanical robustness, and the films demonstrated the highest 5A adhesion grade, 8H pencil hardness, and endured washing test. What's more, the composite films are capable of healing scratches caused by external forces. The robust yet self-healing dual-functional composite films with high performance by a simple mixing system would provide promising potential for their applications in various fields like medical devices, optical lens, goggles, and optical windows.
具有防雾和抗菌功能的双功能薄膜在透明材料表面有广泛的应用。然而，目前为止，关于这种双功能薄膜的研究还很少。在这项工作中，我们通过简单的一锅法制备了具有自修复功能的聚（乙烯醇）/聚（丙烯酸）/Ag（聚合物-Ag）复合薄膜，该薄膜同时具有防雾和抗菌性能。防雾性能归因于聚合物中大量的羟基。通过热处理得到的 Ag 纳米粒子均匀地分布在透明复合薄膜中，能够抑制细菌（如大肠杆菌）的生长并导致其死亡。聚合物的交联和无机纳米材料的引入赋予了复合薄膜较高的机械强度，该薄膜的 5A 粘附等级最高，铅笔硬度达到 8H，并且可以经受住水洗测试。此外，复合薄膜还具有修复外力造成的划痕的能力。这种具有优异性能的、通过简单混合体系制备的坚固且可自修复的双功能复合薄膜在医疗器械、光学镜片、护目镜和光学窗等领域具有广阔的应用前景。
