王筱宁,杨雨凡,曹雨晴,詹红钰,杨国超,蔡静蕊.氟化PVA-SiO2薄膜单面疏水性的研究与表征[J].包装工程,2019,40(19):164-171.
WANG Xiao-ning,YANG Yu-fan,CAO Yu-qing,ZHAN Hong-yu,YANG Guo-chao,CAI Jing-rui.Research and Characterization of Single-sided Hydrophobicity of Fluorinated PVA-SiO2 Films[J].Packaging Engineering,2019,40(19):164-171. |
| 氟化PVA-SiO2薄膜单面疏水性的研究与表征 |
| Research and Characterization of Single-sided Hydrophobicity of Fluorinated PVA-SiO2 Films |
| 投稿时间：2019-04-22 修订日期：2019-10-10 |
| DOI：10.19554/j.cnki.1001-3563.2019.19.024 |
| 中文关键词: 聚乙烯醇 单面疏水 接触角 十七氟癸基三甲氧基硅烷 |
| 英文关键词: PVA single-sided hydrophobicity contact angle heptafluorodecyl trimethoxysilane |
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| 中文摘要: |
| 目的 研究开发一种具有单面疏水性能的聚乙烯醇薄膜材料作为包装材料。方法 将质量分数为12%、醇解度为88%的PVA溶液与质量分数为5%的纳米SiO2溶液按体积比为1∶1混合并加热搅拌，通过流延干燥的方式制备PVA-SiO2薄膜。然后分别用体积分数为2.5%，5%，7.5%的十七氟癸基三甲氧基硅烷（FAS）-乙醇溶液以浸泡方式修饰薄膜的其中一面，并通过溶解性测试、接触角测试、场发射扫描电子显微镜（FE-SEM）、傅里叶变换衰减全反射红外光谱测试（ATR-FTIR）等方法表征改性结果。结果 结果表明薄膜单面疏水性得到改善，改性后的薄膜在水中的溶解时间增加，且接触角均在120°以上，表明FAS起到了降低表面能的作用；FE-SEM结果显示，Si元素含量对薄膜的疏水性能有着重要影响；ATR-FTIR显示，FAS改性成功将氟原子引入到薄膜表面，且增加了硅原子的数量。其中用质量分数为5%的FAS-乙醇溶液修饰后的薄膜疏水性最好，接触角达到了126.21°。结论 与未改性薄膜相比，经FAS单面疏水改性的PVA-SiO2薄膜疏水性能得到大大提高，拓宽了PVA薄膜材料的应用领域。 |
| 英文摘要: |
| The work aims to study and develop a kind of polyvinyl alcohol (PVA) film material with single-sided hy-drophobic property as packaging material. PVA-SiO2 films were prepared by tape-casting drying with 12% (mass fraction) PVA solution with 88% alcoholysis degree and 5% (mass fraction) nano-SiO2 solution heated and stirred at 1:1 volume ratio. Then, one side of the film was modified by 2.5%, 5% and 7.5% heptafluorodecyl trimethoxysilane (FAS)-ethanol solution, and the modified results were characterized by solubility test, contact angle test, field emission scanning electron microscopy (FE-SEM) and Fourier transform attenuated total reflection infrared spectroscopy (ATR-FTIR). The results indicated that, the one-sided hydrophobicity of the films was improved. The dissolution time of modified film in water increased and the contact angles of all kinds of modified films were above 120°, which meant that FAS did play a role in lowering the surface energy. FE-SEM results showed that, the content of Si element had an important influence on the hydrophobicity of the films. ATR-FTIR showed that, fluorine atoms were successfully introduced into the film surface after FAS modification, and the number of silicon atoms was increased. The hydrophobicity of the film modified by 5% (mass fraction) FAS-ethanol solution was the best, and the contact angle reached 126.21°. The hydrophobic properties of PVA-SiO2 films after single-sided modification by FAS are much better than those of unmodified ones, which widen the application field of PVA film materials. |
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