化工新型材料

化工新型材料 ›› 2023, Vol. 51 ›› Issue (12) : 102-107. DOI: 10.19817/j.cnki.issn1006-3536.2023.12.010

新材料与新技术

微-纳结构TiO₂的制备及其紫外屏蔽性能研究

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Preparation and study on the UV shielding properties of micro-nanostructured TiO₂

Hu Dabin¹, Zuo Shixiang¹, Nian Junjie¹, Wang Can², Yao Chao¹

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Received		Published
2022-08-15		2023-12-20
Issue Date	Revised Date
2023-12-27	2022-08-15

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摘要

采用液相沉积法将纳米TiO₂负载于酸化微米TiO₂核体,制备具有微-纳结构的TiO₂复合粉体,然后以六偏磷酸钠为分散剂,获得具有优异防晒性能的分散浆。紫外线UV、透射电子显微镜和粒径测试结果表明,微米TiO₂和纳米TiO₂质量比为4∶3时,复合粉体紫外屏蔽性能最佳,且纳米TiO₂比较均匀地负载在微米TiO₂表面,此时粉体颗粒的粒径为312nm。模拟防晒乳液进行防晒测量,结果表明分散浆的紫外屏蔽性能优于复合粉体且具备更好的透明性。流变性能测试表明:分散浆为假塑性流体,具有剪切稀化特性,流动行为符合幂律模型且触变性较小可以长期存放;分散浆黏度随着温度升高而降低,在低固含量条件下,黏度对温度更为敏感。

Abstract

Nano-TiO₂ was loaded on acidified micro-TiO₂ core by liquid deposition method to prepare TiO₂ composite powder with micro-nano structure,and then sodium hexametaphosphate was used as dispersant to obtain a dispersion slurry with excellent sunscreen performance.The results of UV,TEM and particle size tests showed that when the mass ratio of micro-TiO₂ and nano-TiO₂ was 4∶3,the UV shielding performance of the powder was the best,and nano-TiO₂ was evenly loaded on the surface of micro-TiO₂.At this time,the particle size of powder particles was 312nm.The sunscreen measurement was carried out by simulating sunscreen lotion,and the results indicated that the UV shielding performance of the dispersion slurry was better than that of the composite powder and had better transparency.The rheological performance test demonstrated that the disperse slurry was a pseudoplastic fluid with shear-thinning characteristics,and the flow behavior conformed to the power law model and the thixotropy was small and could be stored for a long time.The viscosity of the slurry decreased with the increase of temperature,and at low solid content,the viscosity was more sensitive to temperature.

关键词

微米TiO₂ / 纳米TiO₂ / 分散浆 / 紫外屏蔽 / 流变

Key words

micro-TiO₂ / nano-TiO₂ / dispersion slurry / UV shielding / rheology

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微-纳结构TiO₂的制备及其紫外屏蔽性能研究[J]. 化工新型材料, 2023, 51(12): 102-107 DOI:10.19817/j.cnki.issn1006-3536.2023.12.010

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