National Synchrotron Radiation Laboratory, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei 230026, China; Institutes of Physical Science and Information Technology, Anhui University, Hefei 230026, China.
College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China.
Carbohydr Polym. 2022 Nov 15;296:119928. doi: 10.1016/j.carbpol.2022.119928. Epub 2022 Jul 29.
The coating is frequently adopted to modify the product surface without influencing the essential features of the pristine products. Recently, significant demand has existed for efficient anti-fogging/anti-microbial surfaces in various applications to inhibit microbial growth with high transparency in high-humidity environments, especially in pandemics such as COVID-19. The current study used dual-functional chitosan (Ch) polysaccharide coating with highly hydrophilic properties to be progressively incorporated onto the glass substrates using a simple one-pot technique. Utilizing hot/cold fogging tests and plate count method, the dual-functional Ch/SiO(3) layer possesses excellent antifogging performance and anti-microbial activity. The hydrogen bonds and electrostatic attractions formed between MSN and Ch result in a higher bound water ratio, as confirmed by the low field nuclear magnetic resonance (LF-NMR). Therefore, based on the chitosan/silica layer, 95 % is the minimum proportion of bound water necessary in the final layer structure to completely inhibit microbial and fogging activities.
涂层通常被用于修饰产品表面，而不会影响原始产品的基本特性。最近，人们对各种应用中的高效防雾/抗菌表面有很大的需求，以在高湿度环境中抑制微生物生长并保持高透明度，尤其是在 COVID-19 等大流行期间。本研究使用具有高亲水性的双功能壳聚糖（Ch）多糖涂层，通过简单的一锅技术逐渐引入到玻璃基底上。利用冷热雾测试和平板计数法，双功能 Ch/SiO(3)层具有优异的防雾性能和抗菌活性。MSN 和 Ch 之间形成的氢键和静电吸引导致更高的结合水比例，这一点通过低场核磁共振（LF-NMR）得到了证实。因此，基于壳聚糖/硅层，在最终层结构中，95%是完全抑制微生物和雾度活性所需的最低结合水比例。
