Materials produced from plant biomass: part III: degradation kinetics and hydrogen bonding in lignin
Materials produced from plant biomass: part III: degradation kinetics and hydrogen bonding in lignin
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DOI：
10.1590/s1516-14392013005000112
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发表时间：
2013-10-01
期刊：
影响因子：
--
通讯作者：
Zattera, Ademir J.
中科院分区：
文献类型：
--
作者：
Poletto, Matheus;Zattera, Ademir J.
采用傅里叶变换红外光谱（FTIR）和热重分析（TGA）对巨桉（LEUG）和火炬松（LPIT）的Klason木质素进行了表征。采用Kissinger法通过TGA测定了降解动力学参数。热重分析结果表明，LPIT比LEUG具有更高的热稳定性和活化能。FTIR结果表明，LPIT的分子间平均相互作用强度和酚基间氢键形成焓均高于LEUG。结果表明，热稳定性和降解机制之间的差异可能与木质素中氢键的差异有关。
In this study Klason lignins from Eucalyptus grandis (LEUG) and Pinus taeda (LPIT) were characterized using Fourier transform infrared (FTIR) spectroscopy and thermogravimetry (TGA). The degradation kinetic parameters were determined by TGA using the Kissinger method. Thermogravimetric results showed that LPIT had higher thermal stability and also higher activation energy than LEUG. FTIR results showed that the average strength of intermolecular interactions and enthalpy of hydrogen bond formation among the phenolic groups are higher for LPIT than for LEUG. The results demonstrated that differences between thermal stability and degradation mechanisms might be associated with differences in hydrogen bonding in lignin.