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标题:Transparent nanocomposite films of lignin nanospheres and poly (vinyl alcohol) for UV-absorbing
时间:2020-01-15 11:42:33
DOI:10.1021/acs.iecr.7b04108
作者:Xiong, Fuquan; Wu, Yiqiang; Li, Gaiyun
出版源: 《Industrial & Engineering Chemistry Research》 :acs.iecr.7b04108
摘要: Lignin nanospheres/poly­(vinyl alcohol) (LNS/PVA) nanocomposite films were prepared through solvent casting approach. Compared with lignin/PVA blend film, LNS could be evenly dispersed in PVA matrix, and the nanocomposite films did not generate macroscopic phase separation. Maximum decomposition temperature (<italic>T</italic><sub>max</sub>) and glass transition temperature (<italic>T</italic><sub>g</sub>) of pure PVA film were 264.7 and 104.2 °C, while the <italic>T</italic><sub>max</sub> and <italic>T</italic><sub>g</sub> of the nanocomposite film containing 1 wt % LNS increased to 272.1 and 116.8 °C, respectively. Moreover, with increasing of LNS content in PVA matrix, the <italic>T</italic><sub>max</sub> and <italic>T</italic><sub>g</sub> of the nanocomposite films gradually increased. Adding a certain amount of LNS in PVA could improve mechanical strength of the films under the condition of elongation at break in a small amount of loss. The nanocomposite films outperformed the lignin/PVA blend film in UV-absorbing and transparency, which are a promising candidate for medicine bottles and food packaging.
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页数:23 PAGES
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