高效紫外屏蔽效应的β-纳米羟基氧化铁/室温硫化硅橡胶纳米复合材料的制备及表征(英文)

Preparation and Characterization of β-FeOOH/RTV Nanocomposites with High-UV Shielding Efficiency

采用磷酸二氢钠作为形貌调控剂通过水热合成制备了β-纳米羟基氧化铁并对其进行了分析表证。紫外吸收可见光谱表明β-纳米羟基氧化铁可以吸收98%的紫外光在整个紫外区域(200~400 nm),具有潜在的紫外防护应用前景。β-纳米羟基氧化铁/室温硫化硅橡胶纳米复合材料通过原位聚合的方式制得,紫外光谱表明随β-纳米羟基氧化铁的加入,复合材料的紫外吸收能力显著提高,当加入0.05 wt%的β-纳米羟基氧化铁时,复合材料在240~400 nm紫外区域的吸收值由62%提高到了98%,表明复合材料有望应用于高效紫外屏蔽。

β-FeOOH nanorods were prepared by hydrothermal synthesis using NaH_2PC>4 as structural modifier.X-ray diffraction(XRD) pattern indicates that the as-prepared product is the pure tetragonal phase of β-FeOOH.The scanning electron microscope(SEM) and transmission electron microscope(TEM) observations reveal the targeted product is rod-shaped with a long axis of 600 nm and short axis of 100 nm.Ultraviolet-visible(UV-vis) absorption spectroscopy show that the β-FeOOH nanorods perform excellent absorption(98%) on the whole UV area(200~400 nm),reflective of a potentially desired anti-ultraviolet light property.β-FeOOH/RTV nanocomposites were subsequently prepared from Polydimethylsiloxane and as-prepared β-FeOOH nanorods via in situ polymerization.The nanocomposite containing a very low content(0.05%in weight) of β-FeOOH nanorods possess the high-UV light shielding efficiency.The results show the UV absorbance of RTV nanocomposite is raised from about 62%to 98%in the UV region(240~400 nm),revealing promising technical applications in UV shielding.