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TiO_2纳米晶/空心玻璃微珠复合填料的制备与研究 被引量:11

Preparation and Study of TiO_2 Nanocrystals/Hollow Glass Microsphere Composite Fillers
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摘要 采用化学沉积法使TiO2以纳米粒子的形式包覆于空心玻璃微珠表面,成功制备了TiO2纳米晶/空心玻璃微珠复合填料。分别用扫描电镜(SEM)及紫外可见近红外分光光度计对产物进行了晶体形貌观察及光反射性能测试。结果表明:TiO2在空心玻璃微珠表面包覆效果良好,且经过热处理后空心玻璃微珠破损率很低,二氧化钛纳米晶尺寸为5~50nm,膜层厚度为50~500nm;光谱分析表明:该复合粉体对可见光和近红外波段的太阳光辐射具有很高的反射率(〉95%)。将改性空心微珠、空心玻璃微珠及国外较好的玻璃微珠分别作为填料制备隔热涂料,光谱分析表明:以改性微珠作为填料制备的涂料,漆膜对太阳光主要能量波段(500~1500nm)的光反射性能得到显著提高,当涂料与改性微珠质量比为100:15时,漆膜的光反射效果最佳,平均光反射率高于85%,该性能指标优于空心玻璃微珠及国外同类产品。 TiO2 nano - particles were coated on the surface of the hollow glass microsphere by chemical deposition method, then the TiO2 nanocrystals/hollow glass microsphere composite fillers were successfully prepared. The crystal morphology and properties of light reflection were characterized by scanning electron microscopy(SEM) and UV -visible and near-infrared spectrophotometer. The results showed that the coating effect of TiO2 on the surface of hollow glass microspheres was fine and the breakage rate of hollow glass microspheres was very low after heating treatment. The size range of the TiO2 nanocrystals is from 5 nm to 50 nm, and the film thickness is from 50 nm to 500 nm. Spectrum analysis showed that the composite powders had a high reflectivity ( 〉95% ) to the solar radiation the visible and near infrared spectrum. The modified hollow microspheres, hollow glass microspheres and glass microsphere from abroad were used as fillers to prepare heat insulation coatings, spectrum analysis showed that the light reflection properties of the coating on the main energy band of sunlight (500 nm - 1 500 nm) had been significantly improved by the modified hollow microspheres as fillers in coatings, when the mass ratio of the paint and the modified hollow microspheres was 100: 15, the light reflection of the film was the best, the average reflective rate was higher than 85% ,the performance was better than hollow glass microspheres and similar foreign products.
出处 《涂料工业》 CAS CSCD 北大核心 2011年第6期14-17,共4页 Paint & Coatings Industry
关键词 二氧化钛 空心玻璃微珠 隔热涂料 光反射 复合填料 TiO2 hollow glass microspheres heat insulation coatings light reflection composite fillers
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