KH560修饰纳米硅溶胶对铁铬黑建筑节能涂料性能的影响

发布时间：2018-11-18 16:08

【摘要】：采用水浴加热法以硅烷偶联剂KH560修饰纳米硅溶胶,然后与纯丙乳液混合,制备了铁铬黑建筑节能涂料。采用傅里叶变换红外光谱仪和扫描电镜表征了修饰前后硅溶胶粉末的结构和微观形貌,采用紫外/可见/近红外分光光度计、红外发射率测量仪、精密色差仪、接触角测量仪和氙灯老化箱,探讨了改性硅溶胶用量对涂层性能的影响。增大改性硅溶胶用量虽然可以增强涂层的反射性能,提升涂层的耐人工老化性和耐沾污性,但过多的改性硅溶胶会导致成膜困难,反而降低涂层的性能。当改性硅溶胶与纯丙乳液的质量比为1:1时,所制涂层的综合性能最好:相比未添加改性硅溶胶的涂层,其太阳光反射比和近红外反射比分别提高了7.41%和8.33%,老化和污染后的太阳光反射比变化率则降低了2.67%和1.30%,静态水接触角增大了29.2°,耐水性、附着力、铅笔硬度、柔韧性和冲击强度均得到了一定程度的提升。
[Abstract]:The ferrochrome black building energy saving coating was prepared by water bath heating method with silane coupling agent KH560 modified nano-silica sol and mixed with pure acrylic emulsion. The structure and microstructure of silica sol powder before and after modification were characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM). Ultraviolet / visible / near infrared spectrophotometer, infrared emissivity measuring instrument and precision chromatic difference analyzer were used. The influence of the amount of modified silica sol on the properties of the coating was investigated by contact angle measuring instrument and xenon lamp aging box. Increasing the amount of modified silica sol can enhance the reflective performance of the coating, improve the artificial aging resistance and contamination resistance of the coating, but too much modified silica sol will lead to the difficulty of film formation and decrease the performance of the coating. When the mass ratio of modified silica sol to pure acrylic emulsion is 1:1, the comprehensive performance of the coating is the best: compared with the coating without modified silica sol, the solar reflectance and near-infrared reflectance of the coatings are increased by 7.41% and 8.33%, respectively. After aging and pollution, the solar reflectance ratio decreased by 2.67% and 1.30%, the static water contact angle increased by 29.2 掳, water resistance, adhesion, pencil hardness, flexibility and impact strength were improved to some extent.
【作者单位】：中国人民解放军陆军勤务学院;
【分类号】：TU561.6

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