Chinese Journal of Applied Chemistry ›› 2024, Vol. 41 ›› Issue (9): 1297-1306.DOI: 10.19894/j.issn.1000-0518.240053

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Preparation and Anti-Ultraviolet Performance of Polydopamine Coated Zn-Ti Layered Double Hydroxide with Application in Sunscreen and Daily Chemical Industry

Zheng ZHANG, Yang WANG, Ting LI, Wei-Fu DONG()   

  1. Key Laboratory of Synthetic and Biological Colloids,Ministry of Education,School of Chemical and Material Engineering,Jiangnan University,Wuxi 214122,China
  • Received:2024-02-20 Accepted:2024-07-12 Published:2024-09-01 Online:2024-10-09
  • Contact: Wei-Fu DONG
  • About author:wfdong@jiangnan.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(52273089)

Abstract:

Traditional sunscreens, especially organic ultraviolet (UV) absorbers such as benzophenone, have strong photoactivity and skin permeability, which may cause some human injuries and even cancer. Therefore, it is of great practical significance to develop efficient and safe new sunscreen. With anhydrous zinc acetate (Zn(Ac)2), titanium tetrachloride (TiCl4) and dopamine hydrochloride as raw materials and ethanol/water solution as solvent, polydopamine (PDA) coated Zn-Ti layered double hydroxide (P@ZTL) compounded particles were synthesized through a hydrothermal method. Afterwards, sunscreen samples were prepared with them as the only UV-blocking component. The chemical structure, composition and micro-morphology, along withUV absorbance, free radical scavenging and cytotoxicity performance of P@ZTL were studied. Indispensably, the UV-blocking properties of the sunscreen samples were tested. The results showed that the structure of P@ZTL was 1~5 μm PDA coated ZTL compounded particles, with a specific surface area of 145.916 m2/g. The particles had a typical mesoporous structure with a porosity of 0.154 cm3/g. The compounded particles had great UV absorption and reactive oxygen species (ROS) scavenging abilities, along with no cytotoxicity. The sunscreen with P@ZTL had excellent UV protecting performance, which could preserve fibroblasts from direct UV irradiation. The sun protection index (SPF) values of sunscreen samples added with 10% and 15% P@ZTL reached 47.3±2.3 and 75.1±3.1, respectively, which could fully meet the daily use. Therefore, the synthesized P@ZTL sunscreen has a great application prospect in cosmetics.

Key words: Zn-Ti layered double hydroxide, Polydopamine, UV blocking, Sunscreen, ROS scavenging

CLC Number: