Water vapor solubility of poly(lactic acid) films modified the surface by vacuum ultraviolet irradiation
Water vapor solubility of poly(lactic acid) films modified the surface by vacuum ultraviolet irradiation
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DOI：
10.1002/app.42200
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发表时间：
2015-07
影响因子：
3
通讯作者：
T. Saiga;Shuichi Sato;K. Nagai
中科院分区：
文献类型：
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作者：
T. Saiga;Shuichi Sato;K. Nagai
采用172 nm准分子灯对聚乳酸（PLA）薄膜进行表面改性。系统地研究了真空紫外辐照对水蒸气溶解度和物理性能的影响。真空紫外辐照后，随着表面亲水性的增加，水蒸气溶解度在低压区增加约11-43%，在高压区增加约20-38%。这种增加归因于由于VUV辐射而与羧基形成氢键。改性层在水蒸气吸附后发生明显溶胀。通过真空紫外辐射，在离辐照表面2-3 μm处形成亲水层，但在辐照膜内部没有观察到变化。因此，PLA膜在辐照后的溶解性通过表面的亲水性和溶胀效应而增强。© 2015威利期刊公司. J.应用聚合物Sci. 2015，132，42200。
Surface modification of poly(lactic acid) (PLA) film is performed via 172 nm excimer lamp irradiation. Effects on water vapor solubility and physical properties via vacuum ultraviolet (VUV) irradiation are studied systematically. After VUV irradiation, water vapor solubility increases approximately 11–43% in the low-pressure region and approximately 20–38% in the high-pressure region as surface hydrophilicity increased. The increase is attributed to hydrogen bonding with the carboxyl groups because of VUV radiation. The modified layer is significantly swelling after water vapor sorption. The hydrophilic layer forms a thickness of 2–3 μm from the irradiated surface via VUV radiation, but no changes are observed inside the irradiated film. Therefore, PLA film solubility after irradiation is enhanced by hydrophilicity and the swelling effect of the surface. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42200.