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Study on Ethanol Fractionation of Lignin and Its Sunscreen Performance
Received:July 22, 2024  Revised:August 10, 2024
DOI：10.11981/j.issn.1000-6842.2024.04.92
Key Words:lignin;ethanol fractionation;structural characterization;sunscreen;ultraviolet absorption
Fund Project:广西自然科学基金（2021GXNSFBA220054）；国家重点研发计划（2022YFC2105503）；广西自然科学基金（2023GXNSFGA026001）。
Author NameAffiliationPostcode
XU Qinglei College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004
Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004 		530004
TANG Mengqi Pharmaron （Beijing） New Drug Technology Co.， Ltd.， Beijing， 100176 100176
WANG Chaoyang College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004
Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004 		530004
QI Wenqiang College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004
Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004 		530004
LI Jiawei College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004
Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004 		530004
DU Boyu College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004
Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004 		530004
QIAN Guangfu College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004
Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004 		530004
HUANG Ju China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102 100102
CHEN Changzhou* College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004
Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004 		530004
MIN Douyong College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004
Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004 		530004
NIE Shuangxi* College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004
Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004 		530004
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Abstract:
      Lignin， as a biomass resource second only to cellulose in nature， is of high research value because of its polyaromatic structure with ultraviolet absorption properties. However， industrial lignin has uneven molecular mass and structure due to different sources and extraction processes， and the product properties vary. In this study， the ethanol solution method was used to grade purified corn kernel industrial lignin （EL 0） to obtain three lignin grades： EL 100， EL 70， and ELR. Then the graded lignin was blended into commercial baby creams to prepare lignin-based sunscreens， respectively， and to evaluate their sun protection properties. The sunscreen properties of prepared lignin-based sunscreens were tested， the results showed that UV absorption capacity of lignin samples before and after fractionation was ELR > EL 70 > EL 0 > EL 100 in descending order. When the mass fraction of lignin of lignin-based sunscreens was 10%， the sun protection factor （SPF） value of EL 0 sunscreen was only 12.55； the SPF value of ELR sunscreen reached 51.79， which enhanced the sunscreen performance while made the product darker in color. With an SPF value of 48.88， the EL 70 had a relatively lighter color for a wider range of applications. The results indicated that the graded treatment by ethanol solution method can effectively reduce the inhomogeneity of lignin structure and optimize the effect of lignin in sunscreen products.
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