Simultaneous Enhancements of UV-Shielding Properties and Photostability of Poly(vinyl alcohol) via Incorporation of Sepia Eumelanin

被引：159

作者：

Wang, Yang ^{[1
]}

Li, Ting ^{[1
]}

Ma, Piming ^{[1
]}

Bai, Huiyu ^{[1
]}

Xie, Yi ^{[1
]}

Chen, Mingqing ^{[1
]}

Dong, Weifu ^{[1
]}

机构：

[1] Jiangnan Univ, Sch Chem & Mat Engn, Minist Educ, Key Lab Food Colloids & Biotechnol, 1800 Lihu Rd, Wuxi 214122, Peoples R China

来源：

ACS SUSTAINABLE CHEMISTRY & ENGINEERING | 2016年 / 4卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Sepia eumelanin; Poly(vinyl alcohol); UV-shielding; Photostability; POLYVINYL-ALCOHOL; DEGRADATION; MELANIN; NANOCOMPOSITES; COMPLEXES; RADIATION; BEHAVIOR; FILMS;

D O I：

10.1021/acssuschemeng.5b01734

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Sepia eumelanin (SE), a biomacromolecule, was developed to prepare the excellent UV-shielding polymer material with better photostability. UV-vis transmittance spectra showed that poly(vinyl alcohol) PVA/SE film blocked most ultraviolet light below 300 nm even with a low concentration of SE (0.5 wt %), which still kept its high transparency in the visible spectrum. Rhodamine B photo degradation measurement further confirmed the excellent UV-shielding properties of PVA/SE film. FTIR indicated that the carbonyl absorption bands resulting from phtodegradation for PVA/SE film did not change after UV exposure for 2700 h. The tensile properties of neat PVA were deceased intensely after UV irradiation; however, those of PVA/SE film were reduced a little. Moreover, AFM indicated that the surface roughness of PVA/SE film was much lower than that of a neat PVA one. It could be concluded that SE reduced the PVA degradation rate dramatically, revealing enhanced photostability of PVA/SE film. The mechanism for outstanding UV-shielding properties and photostability of PVA/SE film was illuminated, based on the formation of charge transfer complexes (CTCs) between SE and PVA, photothermal conversion, and the well-known radical scavenging capabilities of SE.

引用

页码：2252 / 2258

页数：7

共 34 条

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