He Lili, Guo Haiping, Lu Jiayue, Liu Qiyu, Qiu Xueqing
Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China.
Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center, Jieyang 515200, China.
ACS Omega. 2025 Feb 13;10(7):6745-6752. doi: 10.1021/acsomega.4c08618. eCollection 2025 Feb 25.
Lignin possesses unique natural antioxidation and UV-absorption abilities, making it a promising ingredient for sunscreen. However, the industrial lignin produced from pulping or bioethanol production generally shows low efficiency due to the limited phenolic hydroxyl content and poor compatibility with sunscreen, respectively. To address this issue, a molten salt hydrate treatment process was carried out for the selective cleavage of ether bonds in industrial lignin. After treatment, a 2-fold increase in phenolic hydroxyl content was observed, and lignin antioxidation efficiency was improved. The intermolecular forces of lignin in water measured by an atomic force microscope showed a significant decrease from -1.46 to 0.46 mN/m, suggesting an efficient increase in lignin hydrophilicity, which promoted lignin compatibility with sunscreen. We converted industrial lignin into colloidal balls, which improved compatibility and dispersion in the cream and more than tripled the sun protection factor compared to the direct addition of industrial lignin.
木质素具有独特的天然抗氧化和紫外线吸收能力，使其成为一种有前途的防晒成分。然而，制浆或生物乙醇生产产生的工业木质素通常效率较低，分别是由于酚羟基含量有限以及与防晒霜的相容性较差。为了解决这个问题，对工业木质素进行了熔盐水合物处理工艺，以选择性地裂解醚键。处理后，观察到酚羟基含量增加了2倍，木质素的抗氧化效率得到提高。通过原子力显微镜测量，木质素在水中的分子间力从-1.46显著降低至0.46 mN/m，表明木质素亲水性有效提高，这促进了木质素与防晒霜的相容性。我们将工业木质素转化为胶体球，这提高了其在乳膏中的相容性和分散性，并且与直接添加工业木质素相比，防晒系数提高了两倍多。
