二氧化钛@氢氧化铝-海藻酸钠复合纳米颗粒的制备及其在防晒霜中的应用

doi:10.3969/j.issn.2097-2806.2025.12.010

摘要/Abstract

摘要： 利用包覆氢氧化铝的二氧化钛（Ti@Al NP）与海藻酸钠（SA）表面的静电吸附，制备了二氧化钛@氢氧化铝-海藻酸钠复合颗粒（Ti@Al-SA NPs），将其引入防晒配方中，制备了Ti@Al-SA0.2-E。利用Zeta电位研究了SA在Ti@Al NP表面的作用机制，通过热重分析仪（TGA）测试了吸附量，采用偏光显微镜观察了防晒乳液的形貌，使用流变仪研究了流变特性，SPF仪测试防晒乳液的防晒值；通过冷热冲击试验，验证了Ti@Al-SA0.2-E的稳定性。结果表明：在pH=5时，SA在Ti@Al NP表面吸附作用最强，制备的Ti@Al-SA0.2 NP表面的SA吸附量达到14.2%；Ti@Al-SA0.2 NP能够以25.0%的固含量制备成分散浆，其黏度为954.8 mPa·s；所制备的Ti@Al-SA0.2-E的SPF值达到最大为22.5，并且冻融循环五次后不破乳，黏度保持在原始黏度的80.0%以上，SPF值保持在原始值的95.0%以上。

关键词: 二氧化钛, 海藻酸钠, 静电吸附, 复合纳米颗粒, 防晒化妆品

Abstract:

Titanium dioxide@aluminum hydroxide-sodium alginate composite nanoparticles （Ti@Al-SA NPs） were prepared through the electrostatic adsorption between titanium dioxide@aluminum hydroxide and sodium alginate （SA）. Subsequently, these composite nanoparticles were dispersed into a slurry, and the slurry was further formulated into a sunscreen lotion. The mechanism of SA adsorption on the surface of Ti@Al NPs was studied using Zeta potential measurement. Thermogravimetric analysis （TGA） was used to determine the adsorption amount. Polarizing microscopy was employed to observe the emulsion morphology. Rheological properties were investigated using a rheometer, and the sun protection factor （SPF） of the emulsion was tested using an SPF meter. Additionally, thermal shock tests were conducted to evaluate the stability of emulsions. The results indicated that the adsorption interaction between SA and Ti@Al NPs was the strongest at pH of 5. The adsorption amount of SA in the Ti@Al-SA0.2 NPs thus prepared was 14.2%. The corresponding aqueous slurry was prepared with Ti@Al-SA0.2 NPs in a solid content of 25.0%, achieving a viscosity of 954.8 mPa·s. The SPF of the prepared emulsion reached a maximum of 22.5. After five heating-cooling cycles, the emulsion did not break and its viscosity maintained at more than 80% of the original viscosity, with the SPF remaining above 95% of the original value.

Key words: titanium dioxide, sodium alginate, electrostatic adsorption, nanocomposite, sunscreen cosmetics

中图分类号:

TQ658

刘华敏, 蔡悦, 年俊杰, 吴凤芹, 姚超, 桂豪冠. 二氧化钛@氢氧化铝-海藻酸钠复合纳米颗粒的制备及其在防晒霜中的应用[J]. 日用化学工业（中英文）, 2025, 55(12): 1575-1581.

Huamin Liu, Yue Cai, Junjie Nian, Fengqin Wu, Chao Yao, Haoguan Gui. Preparation of titanium dioxide@aluminum hydroxide-sodium alginate composite nanoparticles and their application in sunscreen lotions[J]. China Surfactant Detergent & Cosmetics, 2025, 55(12): 1575-1581.

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组分	原料	用量/%	功能
A相	鲸蜡硬脂醇	1.1	乳化剂
	甘油硬脂酸酯	1.5	乳化剂
	鲸蜡醇磷酸酯钾	2.5	增稠剂
	丁基辛醇水杨酸酯	2.0	乳化剂
	新戊二醇二庚酸酯	6.0	润肤剂
	聚二甲基硅氧烷	2.0	润肤剂
	异十二烷	8.0	润肤剂
	碳酸二乙基己酯	10.0	润肤剂
	红没药醇	0.5	保湿剂
	维生素E	0.4	保湿剂
B相	去离子水	40.5	溶剂
	丁二醇	10.0	保湿剂
	Ti@Al-SA	12.5	防晒剂
	聚丙烯酸酯交联聚合物-6	0.6	增稠剂
	甘草酸二钾	0.8	保湿剂
	1, 2-己二醇	1.0	保湿剂
C相	苯氧乙醇	0.6	防腐剂