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在高湿度下,在环氧树脂的固体界面上对凝结水层形成的中子反射分析分析

Yuwei Liu¹, Noboru Miyata², Tsukasa Miyazaki²

¹Institute of Materials Structure Science, High Energy Accelerator Research Organization, 203-1, Shirakata, Tokai, Ibaraki 319-1106, Japan.

Langmuir : the ACS journal of surfaces and colloids

|June 21, 2023

概括

水在环氧树脂与固体基板的接口上积聚,形成一个凝结层. 这种水的吸收受固化和环境条件的影响,会影响粘合性能,建议对接口进行修改以提高耐用性.

科学领域:

材料科学材料科学材料科学
聚合物科学聚合物科学
表面科学是一门学科.

背景情况:

水的吸收显著改变了环氧树脂的结构和特性.
了解水对接口的影响对于粘合剂应用至关重要.
环氧树脂是广泛用于苛刻环境中的粘合剂.

研究的目的:

为了研究在环氧树脂薄膜中吸收的水的空间分布.
为了确定影响SiO2/环氧树脂接口水积累的因素.
为改善环氧基粘合剂的耐水性提供见解.

主要方法:

中子反射计被用来研究环氧树脂薄膜中的水分布.
实验是在高湿度 (85%RH) 的条件下进行的.
研究了环氧固化条件和环境因素的变化.

主要成果:

观察到水分子在SiO2 / 环氧树脂接口上积聚.
形成了一个厚度大约为1nm的凝结水层.
水层厚度随着环氧固化条件的变化而变化,并受到高温和湿度的影响.

结论:

界面上的水积累与界面附近的聚合物层的特性有关.
固化过程中的界面约束效应会影响环氧树脂的界面层.
修改环氧树脂的接口层结构可以减轻水的积累.

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