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首页> 外文期刊>Journal of Applied Polymer Science >Modification of polyurethane-coated fabrics by sol-gel thin films
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Modification of polyurethane-coated fabrics by sol-gel thin films

机译：溶胶-凝胶薄膜对聚氨酯涂层织物的改性

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摘要

Sol-gel derived silica and hybrid films from tetraethoxysilane (TEOS) and 3-glycidyloxypropyltrimethoxysilane (GLYMO) were deposited by dip-coating, in order to find the best treatment. GLYMO-based treatments preserved textile feel of the material. The coatings were characterized by infrared spectroscopy (IR), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and water contact angle measurement. IR spectra confirmed the existence of silicate network and successfully conducted modification for both precursors. DSC and TGA showed that the conditions of hydrolysis had greater influence on TEOS than GLYMO-based treatments. Both treatments shifted the degradation onset to higher temperatures. SEM images showed that polyurethane surface and pores were completely covered and filled by silica or hybrid thin films forming a composite organic-inorganic coating. Hydrophobic effect was preserved for all the samples, except for a single treatment of the GLYMO, due to its polar epoxy group.
机译：为了寻求最佳处理方法，通过浸涂法沉积了溶胶凝胶衍生的二氧化硅和由四乙氧基硅烷（TEOS）和3-环氧丙氧基丙基三甲氧基硅烷（GLYMO）形成的杂化膜。基于GLYMO的处理保留了材料的纺织品手感。通过红外光谱（IR），扫描电子显微镜（SEM），能量色散X射线光谱，差示扫描量热法（DSC），热重分析（TGA）和水接触角测量来表征涂层。红外光谱证实了硅酸盐网络的存在，并成功地对两种前体进行了改性。 DSC和TGA表明，水解条件比基于GLYMO的处理对TEOS的影响更大。两种处理都将降解开始转移到更高的温度。 SEM图像显示，聚氨酯表面和孔被二氧化硅或杂化薄膜完全覆盖并填充，形成了有机-无机复合涂层。除GLYMO的单处理（由于其极性环氧基）外，所有样品均保留了疏水作用。

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