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| Hydroxylation of Lignin and Its Application in Synthesis of Polyurethane |
| Received:June 29, 2021 |
| DOI：10.11980/j.issn.0254-508X.2021.10.016 |
| Key Words:lignin hydroxylation polyurethane modification mechanical properties |
| Fund Project:国家自然科学基金资助项目（31971608）；辽宁省自然科学基金资助项目（2019-ZD-0125）；辽宁“百千万人才工程”培养经费资助；辽宁省高等学校创新人才计划资助项目。 |
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| Abstract:Industrial lignin with huge output was mainly derived from the by-products of pulping and cellulosic ethanol biorefinery， and it had the potential to replace polyol to synthetic polyurethane materials. The hydroxylation of lignin could control the molecular weight and increase the hydroxyl content of lignin， improving the reactivity of lignin and its compatibility in the synthesis system. It also could reduce the aggregation of lignin in the polyurethane， increase the micro-uniformity of the polyurethane materials to enhance the mechanical properties of the polyurethane materials. At the same time， it could also give polyurethane materials anti-ultraviolet， oil absorption， degradable and other properties. The basic physicochemical properties of lignin were briefly introduced， and the current research progress of lignin hydroxylation methods at home and abroad were also introduced. The research and application prospects in the field of synthesis of lignin-based polyurethane materials were discussed. |
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