title: Enhanced Thermal Stability and UV-Shielding Properties of Poly(vinyl alcohol) Based on Esculetin.
abstract: In this article, PVA composites with outstanding thermal stability, UV shielding, and high transparency were fabricated on the basis of traditional Chinese medicine (esculetin). Characterization data have suggested in which the resulting PVA/esculetin (ESC) composites display excellent thermal stability compared to pure PVA and most of the PVA nanocomposites. The pyrolysis mechanism of PVA before and after modification with esculetin varies from chain unzipping degradation followed by chain random scission. The DPPH scavenging activity and FTIR measurements have illustrated that esculetin can scavenge reactive radicals, which leads to improvements in thermal stability and a change in the pyrolysis mechanism of PVA. More importantly, the resulting composites can almost completely block the whole UV region (200-400 nm) without any deterioration of the high transparency of the composites. Therefore, the composites can convert harmful UV light into blue light effectively, which is beneficial for their application as optical materials and devices.
authors.affiliation: The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University , 1800 Lihu Road, Wuxi 214122, China.
authors.forename: Yang
authors.identifier: 0000-0001-7875-9111
authors.initials: Y
authors.lastname: Wang
authors.affiliation: The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University , 1800 Lihu Road, Wuxi 214122, China.
authors.forename: Chennong
authors.initials: C
authors.lastname: Xiang
authors.affiliation: The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University , 1800 Lihu Road, Wuxi 214122, China.
authors.forename: Ting
authors.initials: T
authors.lastname: Li
authors.affiliation: The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University , 1800 Lihu Road, Wuxi 214122, China.
authors.forename: Piming
authors.initials: P
authors.lastname: Ma
authors.affiliation: The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University , 1800 Lihu Road, Wuxi 214122, China.
authors.forename: Huiyu
authors.initials: H
authors.lastname: Bai
authors.affiliation: The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University , 1800 Lihu Road, Wuxi 214122, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Xie
authors.affiliation: The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University , 1800 Lihu Road, Wuxi 214122, China.
authors.forename: Mingqing
authors.initials: M
authors.lastname: Chen
authors.affiliation: The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University , 1800 Lihu Road, Wuxi 214122, China.
authors.forename: Weifu
authors.identifier: 0000-0002-7432-8362
authors.initials: W
authors.lastname: Dong
mesh_terms: D008516:Medicine, Chinese Traditional; D015394:Molecular Structure; D011142:Polyvinyl Alcohol / Q000737:chemistry*; D013696:Temperature; D014466:Ultraviolet Rays; D014468:Umbelliferones / Q000737:chemistry*
chemical_list: D014468:Umbelliferones; D011142:Polyvinyl Alcohol; C007628:esculetin