Nguyen, Thuong-Thuong
(Department of Chemical Engineering, Daegu University, Gyeongsan, Gyeongbuk 38453, Republic of Korea)
,
Kim, Seong-Ho
(Department of Food Engineering, Daegu University, Gyeongsan, Gyeongbuk 38453, Republic of Korea)
,
Kim, Jin Seuk
(The 4th R&D Institute-2nd Directorate, Agency for Defense Development, Yuseong P.O. Box 35-42, Daejeon 34186, Republic of Korea)
,
Kwon, Younghwan
(Department of Chemical Engineering, Daegu University, Gyeongsan, Gyeongbuk 38453, Republic of Korea)
A bacterial strain, Gluconacetobacter sp. DUG-2, isolated from a pellicle naturally formed in fermented mandarin vinegar was studied in an attempt to produce bio-based polyurethanes (PUs) by effectively utilizing biomass wastes. Bacterial cellulose (BC) nanofibrils were successfully produced from ex...
A bacterial strain, Gluconacetobacter sp. DUG-2, isolated from a pellicle naturally formed in fermented mandarin vinegar was studied in an attempt to produce bio-based polyurethanes (PUs) by effectively utilizing biomass wastes. Bacterial cellulose (BC) nanofibrils were successfully produced from extracts of mandarin juice waste under optimized culture conditions. The characteristics of BC nanofibrils characterized by SEM, FT-IR, and WAXD analysis were identical to those expected for the BC. Becaused of the limited application caused by low processability of BC, the produced BC was liquefied in polyethylene glycol/ethylene glycol mixture with sulfuric acid as a catalyst. PUs were prepared by using the liquefied BC (LBC) as a major prepolymer ingredient in combination with hydroxyl-terminated polybutadiene (HTPB) prepolymer. A tensile experiment showed that an increase in the hydroxyl number of LBC enhanced the Young's modulus, and reduced the maximum elongation of BC-based PUs.
A bacterial strain, Gluconacetobacter sp. DUG-2, isolated from a pellicle naturally formed in fermented mandarin vinegar was studied in an attempt to produce bio-based polyurethanes (PUs) by effectively utilizing biomass wastes. Bacterial cellulose (BC) nanofibrils were successfully produced from extracts of mandarin juice waste under optimized culture conditions. The characteristics of BC nanofibrils characterized by SEM, FT-IR, and WAXD analysis were identical to those expected for the BC. Becaused of the limited application caused by low processability of BC, the produced BC was liquefied in polyethylene glycol/ethylene glycol mixture with sulfuric acid as a catalyst. PUs were prepared by using the liquefied BC (LBC) as a major prepolymer ingredient in combination with hydroxyl-terminated polybutadiene (HTPB) prepolymer. A tensile experiment showed that an increase in the hydroxyl number of LBC enhanced the Young's modulus, and reduced the maximum elongation of BC-based PUs.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.