Improving Photostabilization Functions of Powder Coating with Rutile Nano-TiO2
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摘要: 以金红石型纳米TiO2为抗紫外光老化添加剂改性聚酯粉末涂料,采用TEM、XRD等测试手段表征纳米TiO2的性能特征,并用UV-Vis分析金红石型纳米TiO2、锐钛型纳米TiO2以及普通金红石型钛白粉的紫外-可见光特征谱。探讨了纳米TiO2屏蔽紫外线的机理,并用高压紫外汞灯人工加速聚酯粉末涂料的光老化降解,对比分析了未改性聚酯粉末涂料、金红石型纳米TiO2改性聚酯粉末涂料以及有机紫外吸收剂改性聚酯粉末涂料的光泽度变化和色差变化。研究结果表明,纳米TiO2能够使聚酯粉末涂料的抗紫外光老化性能得到较大幅度改善,并能赋予聚酯粉末涂料优异的耐候性能和延长产品的户外使用寿命。
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关键词:
- 金红石型纳米TiO2 /
- 聚酯树脂 /
- 粉末涂料 /
- 耐光老化
Abstract: The polyester powder coating was modified with rutile nano-TiO2 as anti-aging additives. The properties and features of rutile nano-TiO2 were described by some indicating methods, such as TEM, XRD and so on. Water-suspend absorption UV-Vis spectrum of rutile nano-TiO2, anatase nano-TiO2 and rutile titanium white was studied. Polyester powder coating was degradated by accelerated aging test with high pressure mercury-arc lamp. The UV-shield mechanism of nano-TiO2 was discussed. The variation of color and gloss for polyester powder coatings was compared during the weathering test, which include polyester powder coating modified with rutile nano-TiO2 and polyester powder coating modified with UV absorbent. The results show that rutile nano-TiO2 can upgrade photostabilization functions of polyester powder coating, improve the weatherproof property of polyester powder coating, and prolong the service life of polyester powder coating.-
Key words:
- rutile nano-TiO2 /
- polyester resin /
- powder coating /
- photostabilization
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