摘要
以酸性SiO2溶胶作为涂层,通过阳极氧化铝模板压印法,在玻璃表面成功制备了规则排列的超亲水SiO2纳米柱阵列,考察了模板孔深和孔径对SiO2纳米柱阵列结构和性能的影响.结果表明:随着模板孔深的增加,长径比≥10的纳米柱倾向于聚集倒塌,导致可见光透射比大幅下降;控制纳米柱长径比<10时,制备的直立纳米柱结构具有良好的透光性能,且随着模板孔径的减小,纳米柱直径减小,表面粗糙度增大,固体表面面积分数减小,亲水性逐渐增强.该方法可通过模板孔径调控SiO2纳米柱阵列的表面粗糙度和固体表面面积分数,使之呈现超亲水性和高透光性,为超亲水材料的制备提供了新的技术路线.
Regular nano-pillar arrays of super-hydrophilic SiO2 have been successfully fabricated on glass substrates by imprinting anodized aluminum oxide(AAO)templates on SiO2 sol coatings.The effects of pore depth and diameter of the template on the structure and properties of the SiO2 nano-pillar arrays were discussed.The results show that as the pore depth of the template increases,the nano-pillars with the aspect ratio greater than or equal to 10 tend to aggregate,causing a significant decrease in visible light transmittance.However,when the aspect ratio of SiO2 nano-pillar is controlled to be less than 10,a series of vertically aligned nano-pillar arrays with high transparency are obtained.With the pore diameter of the template decreasing,the diameter of the nano-pillar and the solid area fraction of the surface decrease,enhancing the hydrophilicity of the samples.Super-hydrophilicity and high visible light transmittance can be realized by adjusting the pore diameter of AAO to control the surface roughness and the solid area fraction of the surface of the SiO2 nano-pillar array,so that a new technical route is available for the preparation of super-hydrophilic materials.
作者
许海波
张静
黄悦
周忠华
XU Haibo;ZHANG Jing;HUANG Yue;ZHOU Zhonghua(College of Materials,Xiamen University,Xiamen 361005,China;Fujian Key Laboratory of Advanced Materials,Xiamen University,Xiamen 361005,China)
出处
《厦门大学学报（自然科学版）》
CAS
CSCD
北大核心
2020年第4期475-482,共8页
Journal of Xiamen University：Natural Science
基金
福建省科技重大专项(2014HZ0005)。
关键词
SiO2纳米柱阵列
模板压印法
阳极氧化铝
超亲水性
高透光性
SiO2 nano-pillar arrays
template imprinting method
anodized aluminum oxide
super-hydrophilicity
high transmittance
