New insights into greener skin healthcare protection:Lignin nanoparticles as additives to develop natural-based sunscreens with high UV protection  

作　　者：Tianyu Liang Ya Ma Zhicheng Jiang Javier Remón Yingdong Zhou Bi Shi 

机构地区：[1]College of Biomass Science and Engineering,Sichuan University,Chengdu 610065,China [2]National Engineering Laboratory for Clean Technology of Leather Manufacture,Sichuan University,Chengdu 610065,China [3]Thermochemical Processes Group,Aragón Institute for Engineering Research(I3A),University of Zaragoza,C/Mariano Esquillor s/n,50.018,Zaragoza,Spain [4]College of Materials and Chemistry&Chemical Engineering,Chengdu University of Technology,Chengdu 610059,China

出　　处：《Carbon Resources Conversion》2024年第4期121-127,共7页碳资源转化(英文)

基　　金：supported by the National Natural Science Foundation of China(22078211).

摘　　要：Despite lignin nanoparticles (LNPs) being extensively employed as assistant agents to improve the UV-blocking performance of sunscreens, there is a lack of information addressing how and to what extent the chemical and structural features of these particles relate to the improvements observed in the Sun Protection Factors (SPF) of the sunscreens. In this study, lignin oligomers were prepared by a solvothermal extraction process of five typical biomasses in a water–acetone co-solvent without noticeable degradation of the cellulose fraction. Afterward, LNPs were produced from the self-assembly of these lignin oligomers via the solvent-shifting methodology. When incorporated into the sunscreen, these had different morphologies, and exerted different UV-blocking capacities. The effects of the chemical structure and size distribution of the LNPs were systematically studied and compared to those of the original lignin oligomers. LNPs exhibited better UV-blocking ability than soluble lignin oligomers due to the more exposed chromophore on the surface. Besides, compact LNPs with conjugating Cdouble bondO and β-O-4 linkages, as well as the presence of the syringyl unit rich in the methoxyl group in the structures, were beneficial in boosting the UV resistance of the sunscreens. Even though smaller LNPs with higher surface area favored the UV shielding performance, LNPs with widely distributed sizes could further help decrease the UV transmittance. These findings provide an excellent basis for using lignin-derived materials as sunscreen additives and pave the way to developing new environmentally friendly materials for the cosmetic industry.

关 键 词：Lignin nanoparticles UV-blocking ability Structural effect Size effect 

分 类 号：O63[理学—高分子化学]