Effects of different silicon-based surface active additives on degradability of clearcoats exposed to bird droppings

B. Ramezanzadeh; M. Mohseni; N. Naseh

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Effects of different silicon-based surface active additives on degradability of clearcoats exposed to bird droppings

机译：不同的硅基表面活性剂对鸟粪中清漆降解性能的影响

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A series of clearcoats separately loaded with different concentrations of functional silicon-polyacrylate and polydimethyl siloxane additives were prepared. Optical performances of the cured films were studied by gonio-spectrophotometry. Dynamic mechanical thermal analysis was used in order to investigate viscoelastic properties of the additive-containing films. Contact angle measurements, (FTIR) spectroscopy, scanning electron microscopy equipped with energy-dispersive analysis of X-ray, and atomic force microscopy techniques were utilized to evaluate surface properties of the clearcoats. It was shown that clearcoat surface free energy decreased and its cross-linking density increased in the presence of the additives. Results revealed that addition of both additives to the clearcoat enhanced its resistance against pancreatin (simulated bird droppings). A decrease in surface degradation was observed in the presence of the additives. Results also showed that functional polydimethyl siloxane influenced coating viscoelastic, surface chemistry, and biological resistance more effectively compared to that of the functional silicon-polyacrylate one.

机译：制备了一系列分别装有不同浓度的功能性聚丙烯酸酯和聚二甲基硅氧烷添加剂的透明涂料。固化膜的光学性能通过角分光光度法研究。为了研究含添加剂薄膜的粘弹性，使用了动态机械热分析。接触角测量，（FTIR）光谱，配备X射线能量色散分析的扫描电子显微镜和原子力显微镜技术被用于评估透明涂层的表面性能。结果表明，在存在添加剂的情况下，清漆的表面自由能降低，交联密度增加。结果表明，在清漆中添加两种添加剂均可增强其对胰酶的抵抗力（模拟鸟粪）。在添加剂的存在下，观察到表面降解的减少。结果还表明，与功能性聚丙烯酸酯丙烯酸酯相比，功能性聚二甲基硅氧烷更有效地影响涂料的粘弹性，表面化学性质和生物耐受性。

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来源
《JCT research》 |2014年第4期|533-543|共11页
作者
B. Ramezanzadeh; M. Mohseni; N. Naseh;
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作者单位

Department of Surface Coating and Corrosion, Institute for Color Science and Technology, No. 59, Vafamanesh St., Hosainabad Sq., Lavizan, Tehran, Iran,Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran;

Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran;

Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran;

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正文语种 eng
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关键词
Automotive clearcoat; Acrylic/melamine; Functional additives; Bird droppings; Biological resistance; AFM; SEM; DMTA;

机译：汽车清漆;丙烯酸/三聚氰胺功能添加剂;鸟粪生物抗性原子力显微镜扫描电镜DMTA;

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机译：研究含有机硅丙烯酸酯的汽车清漆的抗降解性，这些清漆暴露于鸟粪中
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Effects of different silicon-based surface active additives on degradability of clearcoats exposed to bird droppings

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