Preparation of ZnO quantum dots@SiO2/PVA for multifunctional coating on PET. (22nd January 2020)

• Record Type: Journal Article
• Authors: Ding, Lei; Chen, YiFan; Hua, Zibo; Liu, Li; Chen, Haixu; Zhong, Zhengxiang; Du, Yunzhe; Huang, Yudong
• Is Part Of: New journal of chemistry. Volume 44:Number 5(2020)
• Page Start: 2122
• Page End: 2128
• Publication Date: 2020-01-22
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c9nj05774a
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : A durable, highly transparent and ultraviolet shielded inkjet printing coating was successfully prepared using ZnO QDs@SiO2 . Abstract : ZnO quantum dots@SiO2 (ZnO QDs@SiO2 ) was synthesized by a modified sol–gel method, and then added to polyvinyl alcohol (PVA) to form an ink-absorbing coating with ultraviolet shielding performance on poly(ethylene terephthalate) (PET) films. A layer of silica encapsulated on the surface of ZnO QDs not only reduces the photocatalytic activity significantly, but also prevents the agglomeration of ZnO QDs in aqueous solution. The UV-vis transmittance spectrum of the as-prepared ink-absorbing coating displayed excellent shielding performance in the ultraviolet region (<355 nm) and high transmittance in the visible region. Even when exposed to 30 W ultraviolet for 100 h, no obvious changes were observed in its UV-vis transmittance spectrum, showing long-term durability. Notably, the ink absorption of the ink-absorbing coating prepared using ZnO QDs@SiO2 is higher than that of the ink-absorbing coating prepared using commercially available silica. Therefore, a durable, highly transparent and ultraviolet shielded inkjet printing coating on PET can be prepared with ZnO QDs@SiO2 nanoparticles.