Progress in applications of high value-added lignin materials
HUANG Caoxing;HE Juan;LIANG Chen;TANG Shuo;YONG Qiang;Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Products,Nanjing Forestry University;Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control;College of Chemical Engineering,Nanjing Forestry University;
Lignin is the second most abundant biopolymer after cellulose and can be derived from wood and nonwood plants via pulping and biorefinery processing. Meanwhile,lignin is regarded as the most abundant phenolic polymer in nature. Lignin is a three dimensional amorphous polymer comprising three types of lignin units,termed syringyl,guaiacyl,and p-hydroxyphenyl units,and it is inherently heterogeneous,highly polydisperse,and possesses both non-uniform functionality and chemical linkages. The major linkages between these lignin units comprise several types of ether(e.g.,β—O—4,α—O—4,and 4—O—5) and carbon-carbon linkages(e. g.,β—β,β—5,β—1,and 5—5).Technical lignin is produced as a byproduct from the pulp and paper industry and is mainly burnt to recover chemical and energy. Lignin has a large amount of functional groups,namely hydroxyl,methoxyl,carbonyl,carboxyl groups,and quinone groups. Based on the structures,lignin and its derivatives can be used to make polymer products with a variety of properties including ultraviolet absorption,biodegradable,antibacterial,antioxidant,electron transfer,and metal adsorption. The use of lignin for high-value-added applications has made some progress,and other potential applications of lignin have been explored. By using lignin to produce high-value-added materials,it can not only solve the problem of waste processing,but also become a systematic project of developing of energy saving technology,environmental protection technology and comprehensive utilization of natural resources. In this work,progress in production of polymer material,nano material,capacitance material,carbon materials,membrane material and adsorption material from lignin were reviewed. In addition,perspective of lignin applications in cutting-edge technologies,such as electromagnetic wave absorbing materials and luminescent materials,were also discussed. The insight from this reviewmay provide the information for boosting the high valued-added applications of lignin.
【Fund】： 江苏省自然科学青年基金(20180772);; 国家自然科学基金(31570561);; 广西清洁化制浆造纸与污染控制重点实验室开放基金(KF201725);; 江苏高校优势学科建设工程资助项目(PAPD)
【CateGory Index】： O636.2
【CateGory Index】： O636.2