期刊
JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY
卷 32, 期 3, 页码 210-224出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/02773813.2011.652795
关键词
Kraft lignin; oxypropylation; lignin polyol; rigid polyurethane foam; optimization
资金
- Institute of Paper Science and Technology at Georgia Institute of Technology
Kraft pine lignin was derivatized to a liquid polyol through oxypropylation. The resulting polyol was characterized by GPC, FT-IR, H-1, C-13, and P-31 NMR and was compared to commercial polyols in view of the mechanical property of the corresponding rigid polyurethane foams for the first time. A series of lignin-based PU was synthesized by replacing varying weight percentages of the amount of sucrose polyol and glycerol polyol, two commonly used commercial polyols employed in the control foam preparation. All foams had a low density of similar to 30 Kg m(-3) and showed typical linkages of PU in the FT-IR spectra. The diameter of closed-cells was similar to 650 mu m for most of the foams as revealed by SEM images. The optimal compressive property of rigid PU foams was obtained using lignin polyol without the addition of any other commercial polyols primarily attributed to the rigidity of lignin aromatic structure and the high functionality of lignin hydroxyl groups.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据