College or Textile Science and Engineering (International institute of Silk), Zhejiang Provincial Engineering Research Center for Green and Low-carbon Dyeing & Finishing, Zhejiang Sci-Tech University, Hangzhou 310018, China; Key Laboratory of Clean Dyeing and Finishing Technology of Zhejiang Province, Shaoxing 312000, China.
College or Textile Science and Engineering (International institute of Silk), Zhejiang Provincial Engineering Research Center for Green and Low-carbon Dyeing & Finishing, Zhejiang Sci-Tech University, Hangzhou 310018, China.
Int J Biol Macromol. 2022 Oct 1;218:33-43. doi: 10.1016/j.ijbiomac.2022.06.190. Epub 2022 Jul 4.
TiO with biocompatibility and low price was limited application in cosmetics due to its narrow UV protection range, producing free radicals under UV irradiation to accelerated skin aging and whitish. Herein, a series of highly effective broad-spectrum TiO@lignin sunscreen microscopes (TWLx) were prepared by modulating van der Waals forces and hydrogen bonding interactions between TiO and lignin. The results showed that the UV main absorption peak of TWLx increased from UVA to UVA + UVB. TWLx could completely eliminate the hydroxyl radical produced by TiO under UV irradiation owe to introduction of lignin. Meanwhile, the combination of TiO and lignin could neutralize color, which made TWLx color closer to human skin. The UV-protection test showed that the SPF value of sunscreen containing 3 wt% TWLx reached 137.4. The antioxidant experiment showed that TWLx has about 16 times the DPPH radical scavenging ability of TiO. Finally, high internal phase Pickering emulsions were prepared by using TWLx as a stabilizer. It was found that the internal phase volume fraction of the emulsion was up to 86 vol%, which could be recognized as the highest internal phase reported in suntan lotion. This work would provide new ideas for the synthesis of highly effective broad-spectrum sunscreens.
由于 TiO 的紫外线保护范围较窄，在紫外线照射下会产生自由基，加速皮肤老化和变白，因此具有生物相容性和低价格的 TiO 在化妆品中的应用受到限制。本文通过调节 TiO 和木质素之间的范德华力和氢键相互作用，制备了一系列高效广谱 TiO@木质素防晒霜显微镜（TWLx）。结果表明，TWLx 的 UV 主要吸收峰从 UVA 增加到 UVA+UVB。由于木质素的引入，TWLx 可以完全消除 TiO 在紫外线照射下产生的羟基自由基。同时，TiO 和木质素的结合可以中和颜色，使 TWLx 的颜色更接近人体皮肤。紫外线防护测试表明，含有 3wt%TWLx 的防晒霜的 SPF 值达到 137.4。抗氧化实验表明，TWLx 对 DPPH 自由基的清除能力约为 TiO 的 16 倍。最后，使用 TWLx 作为稳定剂制备了高内相 Pickering 乳液。发现乳液的内相体积分数高达 86vol%，可以认为是防晒霜中报道的最高内相。这项工作为高效广谱防晒霜的合成提供了新的思路。
