文献类型：期刊文献

英文题名：Revealing the Structural Influence on Lignin Phenolation and Its Nanoparticle Fabrication with Tunable Sizes

作者：Ou, Jinfen[1] Li, Suxiang[1] Li, Weiying[1] Liu, Chengguo[2] Ren, Junli[1] Yue, Fengxia[1]

第一作者：Ou, Jinfen

通信作者：Yue, FX[1]

机构：[1]South China Univ Technol, Sch Light Ind & Engn, State Key Lab Pulp & Paper Engn, Guangzhou 510640, Peoples R China;[2]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Nanjing 210042, Peoples R China

年份：0

外文期刊名：ACS SUSTAINABLE CHEMISTRY & ENGINEERING

收录：;EI(收录号：20224613097104);Scopus(收录号：2-s2.0-85140259917);WOS:【SCI-EXPANDED(收录号:WOS:000879409700001)】；

基金：? ACKNOWLEDGMENTS The authors are grateful to the financial support for this work by the National Natural Science Foundation of China (21908072, 22008079, and 21978104) .

语种：英文

外文关键词：lignin; phenolation; nanoparticle; aliphatic hydroxyl group; phenolic hydroxyl group

摘要：Phenolation is one of the most efficient ways to improve lignin's reactivity by increasing phenolic hydroxyl (Ph-OH) contents and active sites. However, due to its complex structural nature, the lignin structure significantly impacts the phenolation and its following nanoparticle fabrication. In this study, phenolation of cellulolytic enzyme lignin (CEL) and kraft lignin (KL) of Simao pine was conducted under appropriate acid-catalyzed conditions and the resultant phenolated lignins were comprehensively characterized. The main structural difference between KL and CEL arises from the content of beta-aryl ether bonds, leading to varied increments of Ph-OH contents in phenolation. Size-controlled lignin nanoparticles (LNPs) were successfully prepared from phenolated lignins with lower molecular weight, lower aliphatic-OH content, and higher level of Ph-OH groups. The average diameters and surface charges of LNPs varied from 60 to 120 nm and -30 to -55 mV, respectively, which highly depended on the phenolation degree of lignin, especially the content of Ph-OH groups. It indicates that the structural features of phenolated lignin could facilitate LNP fabrication with tunable sizes. This study reveals the structural influences on lignin phenolation and its nanoparticle fabrication, providing new insights into the size-controlled design, preparation, and application of LNPs.