Research Progress on Separation and Extraction Technologies of Lignin. - Wang, Dingkai; Cui, Mingyu; Liu, Xutang; Liu, Meiling; Han, Xiaopeng; Xiong, Xiaoming; Chen, Shanglong; Ma, Shangshang; Sun, Qiqi; Jiao, Lingfeng; Zhao, Wei (Materials (1996-1944), 2026)