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논문 기본 정보
- 자료유형
- 학위논문
- 저자정보
- 지도교수
- 정노희
- 발행연도
- 2017
- 저작권
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이 논문의 연구 히스토리 (4)
2019
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초록· 키워드
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Isosorbide derived from biomass is important for the industrial renewable materials because of the limit of petroleum reserve and it is considered as an important platform material of the starch industry. Amphiphilic compounds derived from isosorbide could represent bio-sourced alternatives to surfactants originated from petrochemical origin.
A selective and effective synthesis of anionic surfactants, IPS-ENn and IPS-EXn, from isosorbide derived from biomass was achieved. 2-O-allyl isosorbide was obtained in 81 % yield and with a selectivity of 23/1 (A/B), and 2-O-alkyl isosorbide was obtained in 72 % yield and with a selectivity of 24/1 (D/E). cmc measurements with varying concentrations showed that the cmcs of IPS-EN6 and IPS-EX6 were 1.62×10^-2 M and 7.24×10^-3 M, respectively. The cmc decreased with increasing the carbon chain length increased. The minimum areas per molecule of IPS-ENn were 1.21, 1.10, 1.02, and 0.81 nm^2, and those per molecule of IPS-EXn were 1.23, 1.16, 1.06, and 0.92 nm^2. The decreasing tendency of allowed the identification of different molecular structures of endo and exo. IPS-ENn showed 2~4 mL height difference in foam stability compared to IPS-EXn, and the emulsion stability of IPS-ENn improved with an increase in carbon chain length.
A selective and effective synthesis of anionic surfactants, IPS-ENn and IPS-EXn, from isosorbide derived from biomass was achieved. 2-O-allyl isosorbide was obtained in 81 % yield and with a selectivity of 23/1 (A/B), and 2-O-alkyl isosorbide was obtained in 72 % yield and with a selectivity of 24/1 (D/E). cmc measurements with varying concentrations showed that the cmcs of IPS-EN6 and IPS-EX6 were 1.62×10^-2 M and 7.24×10^-3 M, respectively. The cmc decreased with increasing the carbon chain length increased. The minimum areas per molecule of IPS-ENn were 1.21, 1.10, 1.02, and 0.81 nm^2, and those per molecule of IPS-EXn were 1.23, 1.16, 1.06, and 0.92 nm^2. The decreasing tendency of allowed the identification of different molecular structures of endo and exo. IPS-ENn showed 2~4 mL height difference in foam stability compared to IPS-EXn, and the emulsion stability of IPS-ENn improved with an increase in carbon chain length.
목차
Ⅰ. 서론 1Ⅱ. 실험 4Ⅱ-1. 재료 및 장치 4Ⅱ-2. 분석기기 4Ⅱ-3. Sodium 5-O-alkyl isosorbide-2-O-propyl sulfonate (IPS-ENn)의 합성 5Ⅱ-4. Sodium 2-O-alkyl isosorbide-5-O-propyl sulfonate (IPS-EXn)의 합성 6Ⅱ-5. 분석 8Ⅱ-5-1. 가스크로마토그래피 8Ⅱ-5-2. 수소핵자기공명스펙트럼 9Ⅱ-6. 물성 평가 9Ⅱ-6-1. 계면활성 9Ⅱ-6-2. 기포력 9Ⅱ-6-3. 분산안정성 10Ⅲ. 결과 및 고찰 11Ⅲ-1. IPS-ENn의 합성 11Ⅲ-2. IPS-EXn의 합성 15Ⅲ-3. 음이온 계면활성제의 분석 18Ⅲ-3-1. 수소핵 자기공명스펙트럼 18Ⅲ-4. 계면활성 18Ⅲ-5. 기포력 27Ⅲ-6. 분산안정성 28Ⅳ. 결론 35참고문헌 36감사의 글 40
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