機能性リグニン系ポリマーの設計とその機能制御 -各種p-アルキルフェノールの天然リグニンハイブリッド化効果とその二次機能変換特性-
機能性リグニン系ポリマーの設計とその機能制御 -各種p-アルキルフェノールの天然リグニンハイブリッド化効果とその二次機能変換特性-
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功能性木质素基聚合物的设计及其功能控制-各种对烷基酚的天然木质素杂化效应及其二次功能转化特性-
DOI：
10.2115/fiber.57.54
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
正光 舩岡
中科院分区：
文献类型：
--
作者：
永松 ゆきこ;正光 舩岡
通过浓酸和对烷基酚组成的相分离体系合成了木质素基聚合物（木质素酚）。讨论了相分离反应中构成有机相的酚类结构与木质素官能化效果之间的关系。由于烷基取代基的疏水性和空间位阻，木质素官能化率随着酚核上烷基取代基的延伸而降低。木质素酚的解聚是在碱性介质中C1-酚核的参与。在 120°C 至 170°C 下用 0.5N NaOH 处理，云杉和枫木木质素酚均能有效解聚。接枝酚核的频率与木质酚的解聚度之间存在良好的相关性，与接枝酚的结构无关。
The lignin-based polymers (lignophenols) were synthesized through the phase-separation system composed of the concentrated acid and p-alkylphenols. The relationship between the structures of phenols constituting the organic phase and functionalization effects of lignin in the phase-separation reaction was discussed. The lignin functionalization rate got lower with the extension of alkyl substituents on phenolic nuclei, due to the hydrophobicity and steric hindrance of alkyl substituents. The depolymerizations of lignophenols were the participation of C1-phenolic nuclei in alkaline media. Both spruce and maple lignophenols were effectively depolymerized by the treatment with 0.5N NaOH at 120°C to 170°C. There was a good correlation between the frequency of grafted phenolic nuclei and the depolymerization degree of lignophenols, independent of the structures of grafted phenols.