新型防晒剂:浅色油茶果壳木质素
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科技成果 | 华南理工:新型防晒剂:浅色油茶果壳木质素
合成生物学与绿色生物制造· 2025-10-21 10:09
Core Viewpoint - The article discusses the advancements in non-grain biomass utilization, particularly focusing on innovative research outcomes and their commercial viability in the field of bio-based materials, showcased at the fifth Non-Grain Biomass High-Value Utilization Forum held in Hangzhou, Zhejiang [2]. Summary by Sections Forum Overview - The forum aims to facilitate technology transfer and commercialization in the non-grain biomass sector, having completed over 1500 technology and project matches to date [2]. - The event includes a special activity for showcasing and matching innovative results in biomass utilization, with 50 projects selected for display and precise matching [2]. Innovative Results - **New Sunscreen Agent: Light-colored Camellia Fruit Shell Lignin** [6] - Lignin is recognized for its green safety and superior UV resistance, showing potential as a natural sunscreen agent [7]. - A light-colored nano-lignin was efficiently isolated from camellia fruit shells, achieving a whiteness of 70.90, which significantly enhances the SPF of chemical sunscreens when added [7]. - **Enzymatic Lignin Processing** [8] - Enzymatic lignin, produced through a mild extraction process, retains more native structure but faces challenges like wide molecular weight distribution and color issues [8]. - The application of organic acids for graded processing allows for color control of lignin, resulting in significant color differences between soluble and insoluble lignin [9][10]. - **Modified Lignin for Sunscreen Applications** [8] - Further refinement using organic phosphoric acid catalysis leads to modified lignin that significantly improves SPF performance in sunscreens [11]. Technical Advantages - **Lignin Structure and Performance** [9] - The structure of camellia fruit shell lignin was characterized, revealing a G/S type structure with a significant number of C-C bonds, indicating a strong synergistic relationship with chemical sunscreen agents [9]. - The extraction process was optimized to produce light-colored, efficient UV-resistant lignin without generating additional chromophores [10]. - **Color Control and Yield** [10] - The organic acid grading method offers a broader range of color control compared to conventional solvent grading methods, achieving significant color variations in both soluble and insoluble lignin [10]. - **Industrial Application Potential** [11] - The modified lignin derived from enzymatic processing shows promise for broader industrial applications, enhancing the value of industrial lignin [11].