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| Research on Demethylation Modification of Enzymatic Hydrolysis Lignin under Atmosphere Control and Its Application in Sunscreen Cream |
| Received:February 07, 2026 Revised:March 04, 2026 |
| DOI：10.11980/j.issn.0254-508X.2026.07.003 |
| Key Words:lignin demethylation atmosphere control UV shielding sunscreen |
| Fund Project:国家自然科学基金青年项目（32501597）；国家自然科学基金地区项目（22568026）；云南省教育厅可降解塑料工程研究中心（KKPU202205001）。 |
| Author Name | Affiliation | Postcode | | Jia Jing* | 1School of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan Province, 650000 | 650000 | | Shi Changrong | 1School of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan Province, 650000
2Degradable Plastics Engineering Research Center of Yunnan Provincial Education Department, Kunming, Yunnan Province, 650000 | 650000 | | Li Kai | 1School of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan Province, 650000
2Degradable Plastics Engineering Research Center of Yunnan Provincial Education Department, Kunming, Yunnan Province, 650000 | 650000 | | Huang Jizhen | 1School of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan Province, 650000
2Degradable Plastics Engineering Research Center of Yunnan Provincial Education Department, Kunming, Yunnan Province, 650000 | 650000 | | An Liangliang* | 1School of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan Province, 650000
2Degradable Plastics Engineering Research Center of Yunnan Provincial Education Department, Kunming, Yunnan Province, 650000 | 650000 | | Liu Yuxin* | 1School of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan Province, 650000
2Degradable Plastics Engineering Research Center of Yunnan Provincial Education Department, Kunming, Yunnan Province, 650000 | 650000 |
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| Abstract:This study proposed a hydrobromic acid-catalyzed demethylation modification strategy of enzymatic hydrolysis lignin with a reaction atmosphere supporting to achieve synergistic enhancement of lignin decolorization and antioxidant activity. The result showed that the phenolic hydroxyl content of demethylated enzymatic hydrolysis lignin (N2-C-DEHL) prepared under a nitrogen atmosphere significantly increasing to 2.75 mmol/g from 1.76 mmol/g of the raw lignin, and the lightness value (L*) reached 53.43. A sunscreen cream prepared by compounding 4% N2-C-DEHL with 3% TiO2 and 3% ZnO achieved a SPF value of 11.40 and exhibited excellent antioxidant activity and a good color appearance. |
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