紫外光固化纳米SiO_2/改性丙烯酸松香杂化涂料的研究

Study on Hybrid Paint of Nano-silica/Acrylpimaric Acid Modified Rosin with UV Curing Technology

通过共混法制得了紫外光固化纳米SiO2/改性丙烯酸松香杂化涂料。采用傅立叶红外光谱对其进行表征,并对涂膜的力学性能及耐热性能做了研究。研究结果表明:纳米SiO2的加入使体系的固化速率减慢,固化时间延长,涂膜交联度下降;同一纳米SiO2含量下,随着引发剂量的增加和固化时间的延长,涂膜交联度逐步增加;另外,添加纳米SiO2粒子后,可显著提高涂膜的力学性能,当纳米SiO2加入量为10%时,涂膜硬度达到4H,附着力达到1级;纳米SiO2的加入对涂膜的外观有一定影响,随着纳米SiO2加入量的增加,涂膜由无色透明变成淡白色略透明,因此为保证外观质量及涂膜力学性能,纳米SiO2加入量以在10%以内最好;热失重分析证明纳米SiO2粒子的添加对材料的耐热性能没有明显影响。

UV cured hybrid paint of nano-silica/acrylpimaric acid modified rosin was synthesized by mixing the two materials. The films were analyszed by FTIR, the mechanical properties and the heat resistances were also studied. The results showed that the addition of nano-silica extended the curing time and reduced the degree of crosslinkage and the degree of crosslinkage increased with the increasing dosage of photoinitiator and curing time at the same content of nano-silica. In addition, nano-silica particles could improve the mechanical properties, 10 % content of the nano-silica made the pencile hardness reaching 4H and the adhesion reaching reaching the 1 st grade. It also had some influence on the appearance of the hybrid, so it was better to keep the content of nano-silica less than 10 % to keep the appearance and mechanical properties of the hybrid film. The thermal weight loss analysis showed that the addition of nano-silica had no visible influence on the heat resistance of the hybrid paint.