期刊
JOURNAL OF POLYMERS AND THE ENVIRONMENT
卷 26, 期 8, 页码 3493-3501出版社
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10924-018-1235-2
关键词
Sunflower stalk saccharification lignin residue; Biobutanediol; Solvothermal liquefaction; Biopolyol; Biopolyurethane
资金
- R&D Program of the Ministry of Trade, Industry, & Energy (MOTIE)/Korea Evaluation Institute of Industrial Technology (KEIT) [10049675]
- C1 Gas Refinery Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT [2015M3D3A1A01064882]
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.
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