Synthesis and Characterization of Aminopropyltriethoxysilane-Polydopamine Coatings
Synthesis and Characterization of Aminopropyltriethoxysilane-Polydopamine Coatings
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DOI：
10.1021/acs.langmuir.6b00531
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发表时间：
2016-05-03
期刊：
影响因子：
3.9
通讯作者：
Lenhart, Joseph L.
中科院分区：
文献类型：
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作者：
Knorr, Daniel B., Jr.;Tran, Ngon T.;Lenhart, Joseph L.
聚多巴胺涂层是令人感兴趣的，因为它们可以促进对广泛材料的粘附，并且可以实现各种应用。然而，聚多巴胺-底物相互作用通常是非共价的。为了拓宽聚多巴胺的潜在应用，我们将3-氨丙基三乙氧基硅烷（APTES），一种传统的偶联剂能够共价键合到广泛的有机和无机表面，到聚多巴胺涂料。高能X射线光电子能谱（HE-XPS），传统的XPS，近边X射线吸收精细结构（NEXAFS），傅里叶变换红外衰减全反射（FTIR-ATR），和椭圆偏振测量被用来调查涂层化学和厚度的变化，这表明共价结合APTES到聚多巴胺。这些涂层可以在Tris缓冲液中沉积或通过使用APTES水溶液作为不含Tris的缓冲液沉积。APTES多巴胺盐酸盐沉积从0：1和10：1之间的摩尔比的解决方案，使我们能够控制在一个广泛的范围内的涂料组合物。
Polydopamine coatings are of interest due to the fact that they can promote adhesion to a broad range of materials and can enable a variety of applications. However, the polydopamine-substrate interaction is often noncovalent. To broaden the potential applications of polydopamine, we show the incorporation of 3-aminopropyltriethoxysilane (APTES), a traditional coupling agent capable of covalent bonding to a broad range of organic and inorganic surfaces, into polydopamine coatings. High energy X-ray photoelectron spectroscopy (HE-XPS), conventional XPS, near-edge X-ray absorption fine structure (NEXAFS), Fourier transform infrared-attenuated total reflectance (FTIR-ATR), and ellipsometry measurements were used to investigate changes in coating chemistry and thickness, which suggest covalent incorporation of APTES into polydopamine. These coatings can be deposited either in Tris buffer or by using an aqueous APTES solution as a buffer without Tris. APTES dopamine hydrochloride deposition from solutions with molar ratios between 0:1 and 10:1 allowed us to control the coating composition across a broad range.