文献类型：期刊文献

英文题名：Facile Strategy to In Situ Synthesize Gallic Acid-Modified Lignin and Its Utilization for Fabricating Conductive and Self-Adhesive Hydrogels as Strain Sensors

作者：Shi, Xiaoyu[1,2] Wang, Kai[1] Gao, Shishuai[1,2] Zhang, Daihui[1,2] Lai, Chenhuan[1] Jin, Can[1,2] Li, Mi[3] Wang, Chunpeng[1,2] Yong, Qiang[1] Chu, Fuxiang[1,2]

第一作者：Shi, Xiaoyu

通信作者：Zhang, DH[1];Lai, CH[1];Zhang, DH[2]

机构：[1]Nanjing Forestry Univ, Coll Chem Engn, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat Fo, Nanjing 210037, Jiangsu, Peoples R China;[2]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Natl Engn Lab Biomass Chem Utilizat, Key Lab Chem Engn Forest Prod,Natl Forestry & Gras, Nanjing 210042, Jiangsu, Peoples R China;[3]Univ Tennessee, Ctr Renewable Carbon, Sch Nat Resources, Knoxville, TN 37996 USA

年份：2023

卷号：62

期号：43

起止页码：17765-17775

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20234715083467);Scopus(收录号：2-s2.0-85177061963);WOS:【SCI-EXPANDED(收录号:WOS:001092869300001)】；

基金：This study was supported by the National Natural Science Foundation (32271809, 32322056, 32001283, and 31890774).

语种：英文

摘要：As lignin is one of the most abundant renewable resources, utilization to fabricate functional hydrogels has gained increasing attention. However, the heterogeneous structure and the few available functional groups of lignin limited its applications. Herein, we presented a simple strategy to synthesize gallic acid (GA)-modified lignin as a key component to prepare conductive hydrogels. The addition of GA during the organic solvent pretreatment of poplar changed the structure of lignin and increased the total content of phenolic hydroxyl groups from 3.20 to 3.89 mmol/g (EOL-G(30)). Moreover, the enzymatic hydrolysis of pretreated poplar was enhanced from 49.1 to 55.2% (OP-G(30)) at a low enzyme loading of 5 FPU/g. When using GA-modified lignin to prepare hydrogels, the resulting hydrogel exhibited excellent self-adhesion to various substrates and demonstrated effective free radical scavenging capabilities. When incorporating sodium chloride (NaCl) as conductive ions, the hydrogels exhibit reliable strain-sensing capability. Moreover, they also displayed robust functionality in a low-temperature environment (-20 degrees C). This study has presented valuable insights to realize in situ modification of lignin and fabricate lignin-based functional materials, offering new perspectives for the biorefinery industry.