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首页> 美国卫生研究院文献>Materials >Investigation of Three-Dimensional Structure and Pigment Surrounding Environment of a TiO2 Containing Waterborne Paint
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Investigation of Three-Dimensional Structure and Pigment Surrounding Environment of a TiO2 Containing Waterborne Paint

机译：含TiO2水性涂料的三维结构和颜料周围环境研究

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Serial block-face scanning electron microscopy (SBFSEM) has been used to investigate the three-dimensional (3D) structure of a cured waterborne paint containing TiO2 pigment particles, and the surrounding environment of the TiO2 pigment particles in the cured paint film was also discussed. The 3D spatial distribution of the particles in the paint film and their degree of dispersion were clearly revealed. More than 55% of the measured TiO2 particles have volumes between 1.0 × 106 nm3 and 1.0 × 107 nm3. From the obtained 3D images, we proposed that there are three different types of voids in the measured cured waterborne paint film: voids that exist in the cured paint themselves, voids produced by particle shedding, and voids produced by quasi-liquid phase evaporation during measurement. Among these, the latter two types of voids are artefacts caused during SBFSEM measurement which provide evidence to support that the pigment particles in the cured paint/coating films are surrounding by quasi-liquid environment rather than dry solid environment. The error caused by particle shedding to the statistical calculation of the TiO2 particles was corrected in our analysis. The resulting 3D structure of the paint, especially the different voids are important for further systematic research, and are critical for understanding the real environment of the pigment particles in the cured paint films.
机译：串行块面扫描电子显微镜（SBFSEM）已被用于研究含TiO 2颜料颗粒的固化水性涂料的三维（3D）结构，并讨论了该固化漆膜中TiO 2颜料颗粒的周围环境。 。清楚地揭示了漆膜中颗粒的3D空间分布及其分散程度。超过55％的TiO2颗粒的体积介于1.0×10 6 nm 3 和1.0×10 7 nm 3 < / sup>。从获得的3D图像中，我们建议在测量的水性固化漆膜中存在三种不同类型的空隙：固化漆自身中存在的空隙，由颗粒脱落产生的空隙以及在测量过程中由准液相蒸发产生的空隙。其中，后两种空隙是在SBFSEM测量过程中引起的伪影，它们提供了证据来证明固化的油漆/涂膜中的颜料颗粒被准液体环境而非干燥固体环境所包围。在我们的分析中，校正了由颗粒脱落引起的TiO2颗粒统计计算的误差。所得的涂料3D结构（尤其是不同的空隙）对于进一步的系统研究非常重要，并且对于理解固化的涂料膜中颜料颗粒的真实环境至关重要。

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