铝包膜对金红石纳米TiO_2性能的影响
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摘要
在温度为55～60℃,pH=9.5～10.0条件下,以30 nm纳米二氧化钛为原料,采用偏铝酸钠对其进行无机表面处理,对比测试表面处理前后的粒度分布、Zeta电位、紫外可见吸收光谱、耐温性等物理性能。在此基础上,分别以包膜前后纳米二氧化钛为原料,将纳米二氧化钛与铝银浆配制成随角异色汽车漆,并对其耐候性和随角异色性能进行了对比分析。结果表明,相对于未包膜的纳米二氧化钛,氢氧化铝包膜后的纳米二氧化钛粒度分布更均匀、Zeta电位由负值变为正值、具有更强的紫外吸收强度,耐温性明显提高,随角异色性能变化不大,耐候性明显提高。
At temperature of 55～60 ℃ and pH=9.5～10.0,inorganic surface treatment was carried out with sodium metaaluminate for 30 nm titanium dioxide.The particle size distribution,zeta potential,UV-visible spectrum and thermal endurance of the sample before and after surface treatment were compared and analyzed.Then,optically variable car paint was prepared with aluminiumpaste and nano-titanium dioxide before and after inorganic surface treatment,and the weather resistance and optically variable performance were compared.The results show that compared with those of raw nano-TiO_2,the particle size distribution of nano-titanium dioxide after surface treatment by aluminum hydroxide is more uniform,and the zeta potential of the surface modified nano-TiO_2 changes from negative to positive value with stronger ultraviolet absorption intensity,and improved temperature resistance and weather resistance.The optically variable performance of the nano-TiO_2 does not change much by surface modification.
At temperature of 55～60 ℃ and pH=9.5～10.0,inorganic surface treatment was carried out with sodium metaaluminate for 30 nm titanium dioxide.The particle size distribution,zeta potential,UV-visible spectrum and thermal endurance of the sample before and after surface treatment were compared and analyzed.Then,optically variable car paint was prepared with aluminiumpaste and nano-titanium dioxide before and after inorganic surface treatment,and the weather resistance and optically variable performance were compared.The results show that compared with those of raw nano-TiO_2,the particle size distribution of nano-titanium dioxide after surface treatment by aluminum hydroxide is more uniform,and the zeta potential of the surface modified nano-TiO_2 changes from negative to positive value with stronger ultraviolet absorption intensity,and improved temperature resistance and weather resistance.The optically variable performance of the nano-TiO_2 does not change much by surface modification.
引文
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[2] Guo Gang,Yu Jie,Luo Zhu,et al.Effect of rutile titaniumdioxide nano-particles and hindered amine light stabilizer on the ageing resistant properties of abs[J].ACTA Polymerica Sinica,2008(8):733-739.(郭刚,于杰,罗筑,等.纳米级金红石型二氧化钛与受阻胺光稳定剂协同改进ABS的抗老化性能研究[J].高分子学报,2008(8):733-739.)
[3] Xie Denggang,Guo Jianhua,Yin Henbo,et al.Technology of coated TiO2 with nano rutile TiO2 colloi[J].Paint & Coating Sindustry,2008(8):20-23.(谢登岗,郭建华,殷恒波,等.纳米金红石型二氧化钛胶体制备包核二氧化钛[J].涂料工业,2008(8):20-23.)
[4] Yao Chao,Zhang Zhihong,Lin Xiping.Nanosized titanium dioxide in sunscreen preparations[J].China Surfactant Detergent & Cosmetics,2003,33(5):333-336.(姚超,张智宏,林西平.纳米技术与纳米材料(Ⅴ)——防晒化妆品中的纳米TiO2[J].日用化学工业,2003,33(5):333-336.)
[5] Wu Jianchun,Sun Zuofeng,Huang Wanxia.Research on modifying exterior latex coating with nano-TiO2 and nano-SiO2[J].Iron Steel Vanadium Titanium,2005,26(1):34.(吴健春,孙作凤,黄婉霞.纳米TiO2、SiO2复合改性苯丙外墙乳胶漆的研究[J].钢铁钒钛,2005,26(1):34.)
[6] Zhang Qinghong,Gao Lian.One-step preparation of size-defned aggregates of TiO2 nanocrystals with tuning of their phase and composition[J].Journal of the European Ceramic Society ,2006,26:1535-1545.
[7] Takeshi Morimoto,Hiroyuki Tomonaga,Akemi Mitani.Ultraviolet ray absorbing coatings on glass for automobiles[J].Thin Solid Films,1999,351:61-65.
[8] Guo Gang,Yang Dingming,Xiong Yuzhu.Study on optical properties and application in polypropylene ageing resistance of nano-TiO2 and nano-ZnO[J].Journal of Functional Materials Contents,2004,35(z1):183-185.(郭刚,杨定明,熊玉竹.纳米TiO2和纳米ZnO的紫外光学特性及其在聚丙烯抗老化改性中的应用研究[J].功能材料2004,35(z1):183-185.)
[9] Zhao Dandan,Yu Yanlong,Gao Dongzi,et al.Properties and photocatalytic activity of rutile TiO2 nanosheets[J].Journal of Inorganic Materials,2016,31(1):1-6.(赵丹丹,于彦龙,高东子,等.金红石二氧化钛纳米片的性质及其光催化活性[J].无机材料学报,2016,31(1):1-6.)
[10] Cheng Zhongqi,Wang Guangxing,Gui Yin.Colloid and interface chemistry[M].Beijing:Higher Education Press,2001.(陈宗淇,王光信,桂英.胶体与界面化学[M].北京:高等教育出版社,2001.)