改性MMT／VAE纳米复合水性阻隔涂层的制备及性能研究

doi:10.19491/j.issn.1001-9278.2019.10.001

中国塑料 ›› 2019, Vol. 33 ›› Issue (10): 1-5.DOI: 10.19491/j.issn.1001-9278.2019.10.001

• 材料与性能 • 下一篇

改性MMT／VAE纳米复合水性阻隔涂层的制备及性能研究

李晓燕;丁富传;张和强;谢美霞;王圣权;李娇

福建师范大学化学与材料学院

收稿日期:2019-05-13 修回日期:2019-06-24 出版日期:2019-10-26 发布日期:2019-10-25

Study on Preparation and Properties of VAE/MMT Nanocomposite Barrier Coatings

LI Xiaoyan;DING Fuchuan;ZHANG Heqiang;XIE Meixia;WANG Shengquan;LI Jiao

College of Chemistry and Material Science,Fujian Normal University,Fuzhou 350007,China

Received:2019-05-13 Revised:2019-06-24 Online:2019-10-26 Published:2019-10-25
Contact: LI Xiaoyan E-mail:yanzi504@163.com

摘要/Abstract

摘要： 以γ缩水甘油醚氧丙基三甲氧基硅烷（KH560）为改性剂对蒙脱土（MMT）表面改性，随后将其与乙烯醋酸乙烯酯共聚乳液（VAE）进行复合制备了MMT/VAE纳米复合阻隔涂层。采用傅里叶红外光谱分析仪与X射线衍射对KH560改性前后的MMT进行了表征，通过场发射扫描电子显微镜、X射线衍射分析、热失重分析、差示扫描量热仪、水蒸气与氧气透过率、拉伸性能对阻隔涂层的结构、热稳定性、阻隔性能及力学性能进行了测试。结果表明，KH560成功接枝在MMT表面，并对MMT进行了插层，插层后MMT的层间距由1.210 nm 扩大至 1.447 nm；表面改性后的MMT在VAE基体中呈均匀的片状分布，MMT的层间距扩大至2.758 nm；随着MMT含量的增加，MMT/VAE的热稳定性也随之提高；当复合涂料中MMT含量为50 %（质量分数，下同）时，涂布了MMT/VAE纳米复合涂层的聚对苯二甲酸乙二醇酯（PET）薄膜的水蒸气透过率和氧气透过率比纯PET薄膜分别下降了81.79 %和95.3 %，屈服强度增加了52.68 %；当复合涂料中MMT含量为30 %时，弹性模量增加了74.16 %。

关键词: γ-缩水甘油醚氧丙基三甲氧基硅烷, 蒙脱土, 醋酸乙烯-乙烯共聚乳液, 纳米复合阻隔涂层

Abstract: Montmorillonite（MMT）was surface-treated with γ-glycidoxypropyltrimethoxysilane (KH560) as a modifier, and then the surface-modified MMT was blended with vinyl acetate ethylene copolymer (VAE) emulsion to prepare a type of nanocomposite barrier coating. The structure of pristine MMT and surface-modified MMT were characterized by FTIR and XRD, and the microstructure, thermal stability, mechanical and barrier properties of MMT/VAE nanocomposite coatings were further evaluated by SEM, XRD, TG, DSC, the penetration experiments of water vapor and oxygen, and tensile experiments. The results indicated that KH560 was successfully grafted onto the surface of MMT, thus resulting in an increase of interlaminar spacing of MMT from 1.210 nm to 1.447 nm. The modified MMT was uniformly distributed in the VAE matrix, and the interlaminar spacing of MMT was further improved to 2.758 nm. The thermal stability of the nanocomposite coatings was also improved with an increase of MMT. After the PET thin film was coated with the nanocomposite coatings containing 50 wt % of surface-modified MMT, the water vapor and oxygen transmission rates of the thin film decreased by 81.79 % and 95.3 % respectively, and their yield strength increased by 52.68 %. Moreover, the thin films achieved an increase of elastic modulus by 74.16 % for the nanocomposite coatings containing 30 wt % of surface-modified MMT.

Key words: γ-glycidoxypropy ltrimethoxysilane, montmorillonite, vinyl acetate-ethylene copolymer emulsion; nanocomposite barrier coating

中图分类号:

TB33
TS206.4

李晓燕, 丁富传, 张和强, 谢美霞, 王圣权, 李娇. 改性MMT／VAE纳米复合水性阻隔涂层的制备及性能研究[J]. 中国塑料, 2019, 33(10): 1-5.

LI Xiaoyan, DING Fuchuan, ZHANG Heqiang, XIE Meixia, WANG Shengquan, LI Jiao. Study on Preparation and Properties of VAE/MMT Nanocomposite Barrier Coatings[J]. China Plastics, 2019, 33(10): 1-5.

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改性MMT／VAE纳米复合水性阻隔涂层的制备及性能研究

Study on Preparation and Properties of VAE/MMT Nanocomposite Barrier Coatings

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