首页> 外文期刊>Journal of Polymers and the Environment >Completely Bio-based Polyol Production from Sunflower Stalk Saccharification Lignin Residue via Solvothermal Liquefaction Using Biobutanediol Solvent and Application to Biopolyurethane Synthesis
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Completely Bio-based Polyol Production from Sunflower Stalk Saccharification Lignin Residue via Solvothermal Liquefaction Using Biobutanediol Solvent and Application to Biopolyurethane Synthesis

机译:向日葵秸秆糖化木质素残留物通过生物丁二醇溶剂热液化完全基于生物的多元醇生产及其在生物聚氨酯合成中的应用

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摘要

Sunflower stalk saccharification lignin residue was converted to a completely bio-based biopolyol via solvothermal liquefaction using acid catalyst. Different isomer-type biobutanediols were used to replace petroleum-derived reaction solvents. The reaction parameters were optimized according to measurement of the biomass conversion and the hydroxyl and acid numbers. The lignin-derived biopolyol with a biomass conversion of 80.1%, hydroxyl number of 819.0 mg KOH/g, and acid number of 26.5 mg KOH/g was produced in the optimal condition (reaction temperature of 120 A degrees C, 4 wt% acid catalyst loading, reaction time of 120 min, and 25 wt% biomass loading). The lignin-derived biopolyol was neutralized to decrease the acid number. The neutralized biopolyol was used to synthesize biopolyurethane via polymerization with poly(propylene glycol), tolylene 2,4-diisocyanate terminated. Urethane bond formation was confirmed by FT-IR analysis. The biopolyurethane showed good thermal properties, such as a T-d5 of 273.4 A degrees C, T-d10 of 305.8 A degrees C, and a single degradation peak at 387.2 A degrees C.
机译:使用酸催化剂通过溶剂热液化将向日葵秸秆糖化木质素残留物转化为完全基于生物的生物多元醇。使用不同的异构体型生物丁二醇代替石油衍生的反应溶剂。根据对生物质转化率和羟基和酸值的测量来优化反应参数。在最佳条件下(反应温度为120 A摄氏度,酸含量为4 wt%)生产了木质素衍生的生物多元醇,其生物质转化率为80.1%,羟值为819.0 mg KOH / g,酸值为26.5 mg KOH / g。催化剂负荷,120分钟的反应时间和25 wt%的生物质负荷)。木质素衍生的生物多元醇被中和以降低酸值。用中和的生物多元醇通过与聚(丙二醇),甲苯2,4-二异氰酸酯封端的聚合反应来合成生物聚氨酯。通过FT-IR分析确认了氨基甲酸酯键的形成。生物聚氨酯显示出良好的热性能,例如T-d5为273.4 A摄氏度,T-d10为305.8 A摄氏度,并且在387.2 A摄氏度处有一个降解峰。

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