超细TiO2在硅油中的流变特性与紫外保护性能

doi:10.3969/j.issn.1001-1803.2020.02.007

日用化学工业 ›› 2020, Vol. 50 ›› Issue (2): 112-117.doi: 10.3969/j.issn.1001-1803.2020.02.007

超细TiO₂在硅油中的流变特性与紫外保护性能

王优,左士祥,李霞章,刘文杰,徐荣,钟璟,姚超()

常州大学石油化工学院,江苏常州 213164

收稿日期:2019-07-24 修回日期:2019-08-19 出版日期:2020-02-22 发布日期:2020-03-04
通讯作者: 姚超
作者简介:王优（1995-）,男,江苏淮安人,硕士生,电话：15006116206,E-mail：15006116206@163.com。
基金资助:
江苏省重点研发计划资助项目(BE2018649);江苏省重点研发计划资助项目(BE2018100);江苏省“六大人才高峰”第十三批创新人才团队项目资助(XCL-CXTD-029)

Rheological and UV protective properties of ultrafine TiO₂ in silicone oil

WANG You,ZUO Shi-xiang,LI Xia-zhang,LIU Wen-jie,XU Rong,ZHONG Jing,YAO Chao()

School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China

Received:2019-07-24 Revised:2019-08-19 Online:2020-02-22 Published:2020-03-04
Contact: Chao YAO

摘要/Abstract

摘要：

以超细TiO₂为原料,PEG-10聚二甲基硅氧烷为分散剂,十甲基环五硅氧烷为溶剂,制备出超细TiO₂分散浆。考察了分散剂用量对分散浆稳定性和黏度的影响。结果表明：当TiO₂固含量为30%,分散剂用量为6%的条件下得到的分散浆黏度仅为57.20 mPa·s,触变性小,不易絮凝,稳定性高;以5%有效成分含量与凡士林混合模拟防晒霜,测得其防晒指数SPF为11,与TiO₂粉体相比（SPF为9）,分散浆的紫外保护性能显著提高。流变特性研究结果表明：分散浆黏度具有剪切稀化特性,为假塑性流体,其流动行为符合幂律模型。通过阿伦尼乌斯方程描述温度对黏度的影响,分散浆黏度随温度的升高而减小,随着固含量的增加,分散浆黏度对温度的敏感性增强。

关键词: TiO₂分散浆, 紫外保护, 防晒指数, 流变特性, 黏度

Abstract:

An ultrafine TiO₂ dispersion slurry was prepared using ultrafine TiO₂ as the raw material, PEG-10 polydimethylsiloxane as the dispersant, and decamethylcyclopentasiloxane as the solvent. The effects of the amount of dispersant on the stability and viscosity of the dispersion slurry were studied in detail. The results indicated that, at a solid content of 30% and a dispersant dosage of 6%, the viscosity of the dispersion slurry was only 57.20 mPa·s, which had small thixotropy and high stability and was not easy to flocculate and settle. The sun protection factor （SPF） of the dispersion slurry was 11 with the active ingredient content of 5% in vaseline. The UV protective property of the slurry was significantly improved when compared with TiO₂ powder whose SPF was merely 9. Rheological studies showed that the dispersion slurry was a pseudoplastic fluid with shear thinning characteristics. And the flow behavior could be fitted into the power law model. The effects of temperature on viscosity could be well described by the Arrhenius equation. It was found that the viscosity decreased with the increase of temperature. Moreover, the higher the solid content, the more sensitive the viscosity as changed with temperature.

Key words: TiO₂ dispersion slurry, UV protection, sun protection factor, rheology, viscosity

中图分类号:

TQ658

王优,左士祥,李霞章,刘文杰,徐荣,钟璟,姚超. 超细TiO₂在硅油中的流变特性与紫外保护性能[J]. 日用化学工业, 2020, 50(2): 112-117.

WANG You,ZUO Shi-xiang,LI Xia-zhang,LIU Wen-jie,XU Rong,ZHONG Jing,YAO Chao. Rheological and UV protective properties of ultrafine TiO₂ in silicone oil[J]. China Surfactant Detergent & Cosmetics, 2020, 50(2): 112-117.

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w/%	k/（Pa·sⁿ）	n
30	0.09	0.88
35	0.18	0.86
38	0.42	0.84
40	10.97	0.51

w/%	A/（mPa·s）	E_a/（J·mol^-1）
30	0.173 2	14 395
35	0.104 7	17 299
38	0.135 3	18 671
40	0.603 6	19 170

超细TiO₂在硅油中的流变特性与紫外保护性能

Rheological and UV protective properties of ultrafine TiO₂ in silicone oil

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