Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 137, Issue 24, Pages -Publisher
WILEY
DOI: 10.1002/app.48813
Keywords
biodegradable; films; surfaces and interfaces; mechanical properties; optical properties
Categories
Funding
- National Natural Science Foundation of China [21504018, 21676062, 21501033]
- Natural Science Foundation of Guangxi Province [2018GXNSFAA281131, 2016GXNSFBA380162]
- Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials [EMFM20181122]
- Program of the Collaborative Innovation Center for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials in Guangxi [GXYSXTZX2017-II-3]
- Guangxi Zhuang Autonomous Region
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Although many preparation approaches have been developed, it remains a huge challenge to achieve ultraviolet (UV)-protection films that combine high transparency, excellent UV-shielding, and mechanical properties. Herein, we demonstrate a facile and eco-friendly process for fabricating strong, flexible, and transparent UV-protective poly(vinyl alcohol) (PVA) films by exploiting silicomolybdic acid (SiMoA) as UV absorber and reinforcing phase. Fourier-transform infrared analysis confirms the formation of strong hydrogen-bonding interactions between PVA and SiMoA. The glass-transition temperature, mechanical properties, and UV-shielding stability of the UV-protective PVA composite films obviously increase with increasing the content of SiMoA. By incorporation of only 2 wt % SiMoA, the UV-protective PVA composite film can block more than 90% of UV light in the entire UV regions and retain high visible light transparency (up to 95%). Simultaneously, the UV-protective PVA composite film presents excellent mechanical properties with a tensile strength of 65.2 MPa and an elongation at break of 172.6%, which are 72.0 and 69.5% higher than that of pristine PVA films. This work provides a simple but effective approach for creating strong, flexible, and transparent UV-blocking polymeric materials via hydrogen-bonding assembly, which are expected to have wide application prospects in UV-protection field. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 137, 48813.
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