Understanding the role of silane pretreatments in an organic coating system. Part 2: a study of molecular dynamics simulation

Understanding the role of silane pretreatments in an organic coating system. Part 2: a study of molecular dynamics simulation
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了解硅烷预处理在有机涂层系统中的作用。

DOI:
10.1007/s11998-019-00183-9
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发表时间:
2019-07
期刊:
JCT Research
影响因子:
--
通讯作者:
Hu Ji Ming
Hu Ji Ming
中科院分区:
其他
文献类型:
--
作者:
Wang Xiao Xin;Fu Hong Li;Jiang Mei Yan;Liu Ying Chun;Hu Ji Ming

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本文第二部分采用分子动力学模拟方法对硅烷预处理的环氧涂层进行了理论研究。结果表明,(3-缩水甘油氧基丙基)-三甲氧基硅烷(GPTMS)提供了改善铝和环氧树脂界面的相互作用能,从而确保令人满意的粘合。水扩散最快和最慢的界面的双-1,2-(三乙氧基甲硅烷基)乙烷(BTSE)和GPTMS预处理的油漆系统,分别,这表明BTSE有最差的和GPTMS提供了最好的能力,在选定的油漆系统之间构建一个可靠的接口。两种硅烷预处理的存在提高了环氧聚合物链的结构松弛对水渗透的抗性。
In the second part of this work, silane-pretreated epoxy coatings on aluminum substrate are theoretically studied by molecular dynamics simulation. The results show that (3-glycidoxypropyl)-trimethoxysilane (GPTMS) provides improved interaction energy for aluminum and epoxy interface and thus ensures satisfactory adhesion. Water diffuses fastest and slowest across the interface of bis-1,2-(triethoxysilyl)ethane (BTSE)- and GPTMS-pretreated painting systems, respectively, suggesting that BTSE has the worst and GPTMS provides the best capability for constructing a reliable interface among the selected painting systems. The existence of both silane pretreatments improves the resistance of structure relaxation of the epoxy polymer chain to water penetration.
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