title: Combination of lignin and L-lactide towards grafted copolymers from lignocellulosic butanol residue.
abstract: A series of BBL-graft-poly (L-lactide) copolymers were synthesized via ring-opening polymerization (ROP) of L-lactide (L-LA) with a biobutanol lignin (BBL) initiator and a triazabicyclodecene (TBD) catalyst under free-solvent at 135 °C. By manipulating the mass ratio of BBL/LLA, BBL-g-PLLA copolymers with tunable number-average molecular weight (Mn) (2544-7033 g mol(-1)) were obtained. The chemical structure of PLLA chains was identifiable by FT-IR, (1)H NMR and (13)C NMR spectroscopies, in combination with UV-vis spectra to provide support for the existence of the BBL in the copolymer. This provided solid evidence for the successful synthesis of BBL-g-PLLA copolymer. The thermal properties and surface characterization of BBL-g-PLLA copolymers were different from those of linear PLLA. Furthermore, the BBL-g-PLLA copolymer film showed good absorption capacity in the UV region and high transparency in the visible light region, which was expected to find significant applications in UV-protective coating film.
authors.affiliation: Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Taizhou 318000, PR China. Electronic address: zongenmin@163.com.
authors.forename: Enmin
authors.initials: E
authors.lastname: Zong
authors.affiliation: Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Taizhou 318000, PR China.
authors.forename: Jinhua
authors.initials: J
authors.lastname: Jiang
authors.affiliation: School of Engineering, and National Engineering and Technology Research Center of Wood-based Resources Comprehensive Utilization, Zhejiang Agriculture and Forestry University, Hangzhou Lin'an 311300, PR China; Institute of Chemical Industry of Forestry Products, CAF, Nanjing 210037, PR China. Electronic address: liuxiaohuancaf@163.com.
authors.forename: Xiaohuan
authors.initials: X
authors.lastname: Liu
authors.affiliation: School of Engineering, and National Engineering and Technology Research Center of Wood-based Resources Comprehensive Utilization, Zhejiang Agriculture and Forestry University, Hangzhou Lin'an 311300, PR China.
authors.forename: Shenyuan
authors.initials: S
authors.lastname: Fu
authors.affiliation: Institute of Chemical Industry of Forestry Products, CAF, Nanjing 210037, PR China.
authors.forename: Yuzhi
authors.initials: Y
authors.lastname: Xu
authors.affiliation: Institute of Chemical Industry of Forestry Products, CAF, Nanjing 210037, PR China.
authors.forename: Fuxiang
authors.initials: F
authors.lastname: Chu
mesh_terms: D000440:Butanols / Q000737:chemistry*; D004146:Dioxanes / Q000737:chemistry*; D008031:Lignin / Q000737:chemistry*; D058105:Polymerization; D013499:Surface Properties; D013696:Temperature
chemical_list: D000440:Butanols; D004146:Dioxanes; C036909:lignocellulose; D008031:Lignin; C091880:dilactide
keywords: Graft copolymer; Lignocellulosic butanol residue; Ring-opening polymerization (ROP); UV absorption; l-Lactide