期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 81, 期 -, 页码 521-529出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2015.08.046
关键词
Lignocellulosic butanol residue; epsilon-caprolactone; Graft copolymer; UV absorption
资金
- Special Fund for Scientific Research Foundation of Zhejiang Agriculture & Forestry University [2014FR070]
- Program for key Science and Technology Team of Zhejiang Province [2013TD17]
- Key Research Foundation of Taizhou University [2014PY027]
- Lecture and Study Program for Outstanding Scholars from Home and Abroad [CAFYBB2011007]
- State Key Laboratory of Motor Vehicle Biofuel Technology [KFKT2013011]
- National Natural Science Foundation of China [31200448]
In this paper, a graft from Ring-Opening Polymerization (ROP) technique was used to synthesize a lignin-graft-poly (epsilon-caprolactone) copolymer (BBL-g-PCL) using biobutanol lignin (BBL) as raw material recovered from lignocellulosic butanol residue. Polymerizations were carried out with various mass ratios of BBL and CL monomer ([BBL]/([BBL] + [CL]) = 1.0%, 5.0%, 10%, 20% and 40% (w/w)) to obtain BBL-g-PCL copolymers with different molecular weights, ranging from 367 to 8163 g mol(-1). The grafting efficiency was preliminary evidenced by the long-term stability of dissolution of BBL-g-PCL in toluene. FT-IR and NMR analysis provided the further evidences for successful formation of BBL-g-PCL copolymer. The thermal properties of BBL-g-PCL copolymers were characterized by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). These results indicated that BBL-g-PCL copolymer had relatively good thermal stability. The static contact angle of BBL-g-PCL coating film reached to 80. The surface functional groups and chemical composition of BBL-g-PCL copolymer was investigated in detail by X-ray photoelectron spectroscopy (XPS). The surface morphology of BBL-g-PCL copolymer was studied by Atomic force microscopy (AFM). Additionally, BBL-g-PCL coating film exhibited high absorption in the ultraviolet (UV) range, which could allow for applications in UV-blocking coatings, as well as the extents for the utilization of lignocellulosic butanol residue. (C) 2015 Elsevier B.V. All rights reserved.
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