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논문 기본 정보
- 자료유형
- 학위논문
- 저자정보
- 지도교수
- 정노희
- 발행연도
- 2018
- 저작권
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Cationic gemini surfactant has spacer connecting two hydrophilic groups and two hydrophobic groups. It have lower interfacial properties through various structures beyond the structural limit of the monomeric surfactant.
In this study, cationic gemini surfactants were synthesized by increasing the length of the hydrophobic chain and by using 1,4-butanediol as spacer, and confirmed by FT-IR and 1H-NMR. Their appearance showed white powder. The Kraffts point of the synthesized surfactants were < 0°C. The emulsifying power was better in benzene than soybean oil. The evaluated critical micelle concentration(c.m.c) was 1.8x10-3 ~ 6.5x10-4 mol/L by surface tension method and the surface tension at c.m.c was 22.5 ~ 26.1 dyne/cm. The initial foam height for CG 14-6E-14 by Ross-Miles method was 16 cm and after 5 minutes the height 14 cm.
Synthesized cationic gemini surfactants in this research was used as stabilizers in emulsion polymerization of adhesives and its physical properties were tested. The average particle size of the prepared emulsion adhesives was in the range of 570 ~ 830 nm. Initial adhesive strength was in the range of steel ball no. 24 ~ 32. The adhesive strength was increased from 0.86 to 1.89 . The adhesion stability of prepared adhesives was confirmed to 79.1 ~ 89.5% after 21 days. Cationic gemini surfactants synthesized in this research are expected to be used as stabilizers for emulsion adhesives.
In this study, cationic gemini surfactants were synthesized by increasing the length of the hydrophobic chain and by using 1,4-butanediol as spacer, and confirmed by FT-IR and 1H-NMR. Their appearance showed white powder. The Kraffts point of the synthesized surfactants were < 0°C. The emulsifying power was better in benzene than soybean oil. The evaluated critical micelle concentration(c.m.c) was 1.8x10-3 ~ 6.5x10-4 mol/L by surface tension method and the surface tension at c.m.c was 22.5 ~ 26.1 dyne/cm. The initial foam height for CG 14-6E-14 by Ross-Miles method was 16 cm and after 5 minutes the height 14 cm.
Synthesized cationic gemini surfactants in this research was used as stabilizers in emulsion polymerization of adhesives and its physical properties were tested. The average particle size of the prepared emulsion adhesives was in the range of 570 ~ 830 nm. Initial adhesive strength was in the range of steel ball no. 24 ~ 32. The adhesive strength was increased from 0.86 to 1.89 . The adhesion stability of prepared adhesives was confirmed to 79.1 ~ 89.5% after 21 days. Cationic gemini surfactants synthesized in this research are expected to be used as stabilizers for emulsion adhesives.
목차
Ⅰ. 서 론 1Ⅱ. 실 험 3Ⅱ-1. 실험재료 및 장치 3Ⅱ-2. 양이온 제미니 계면활성제의 합성 4Ⅱ-3. 수성형 접착제의 제조 9Ⅱ-4. 분석 및 물성 평가 9Ⅱ-4-1. 계면활성제의 구조 분석 및 물성 평가 11Ⅱ-4-2. 수성형접착제의 물성 평가 12Ⅱ-4-2-1. 고형분 12Ⅱ-4-2-2. 평균입도분포 13Ⅱ-4-2-3. 초기접착력 13Ⅱ-4-2-4. 최대접착력 13Ⅱ-4-2-5. 안정성 14Ⅲ. 결과 및 고찰 15Ⅲ-1. 양이온 제미니 계면활성제의 합성 및 분석 결과 15Ⅲ-1-1. 적외선 스펙트럼 15Ⅲ-1-2. 수소핵 자기공명스펙트럼 17Ⅲ-2. 계면활성제의 물성평가 19Ⅲ-2-1. 표면장력 및 임계미셀농도 19Ⅲ-2-2. Krafft point 21Ⅲ-2-3. 기포력 및 기포안정성 22Ⅲ-2-4. 유화력 22Ⅲ-2-5. HLB 26Ⅲ-3. 접착제의 특성분석 26Ⅲ-3-1. 고형분 26Ⅲ-3-2. 평균입도분포 27Ⅲ-3-3. 초기접착력 27Ⅲ-3-4. 최대접착력 29Ⅲ-3-5. 안정성 31Ⅳ. 결 론 34참고문헌 36
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