표제지
목차
국문요약 8
Ⅰ. 서 론 9
Ⅱ. 재료 및 방법 11
1. 재 료 11
2. 방 법 11
(1) 옥테닐호박산나트륨 전분의 제조 11
(2) 전분호액의 제조 12
(3) 정상유동 특성 측정 12
(4) 동적 점탄성 측정 13
Ⅲ. 결과 및 고찰 15
1. 정상유동 특성 15
2. 온도의존성 19
3. 시간의존성 24
4. 동적 점탄성 특성 27
5. 정상유동 특성과 동적 점탄성특성과의 상관관계 32
Ⅳ. 결 론 35
참고문헌 37
Abstract 40
감사의 글 42
Fig. 1. Effect of temperature on consistency index (K) for octenylsuccinated corn starch dispersions. : (○) 0mg/g starch, () 10mg/g starch, (▲)15mg/g starch, (◆) 20mg/g starch, (●) 25mg/g starch 20
Fig. 2. Effect of temperature on apparent viscosity (η a,100) for octenylsuccinated corn starch dispersions. (○) 0mg/g starch, () 10mg/g starch, (▲) 15mg/g starch, (◆) 20mg/g starch, (●) 25mg/g starch 21
Fig. 3. Apparent viscosity (ηa,100) at 100 s-as a function of temperature for corn starch 22
Fig. 4. Thixotropic flow curves for octenylsuccinated corn starch dispersion with different OSAn concentrations at 25℃. (a) 0mg/g starch, (b)10mg/g starch, (c) 15mg/g starch, (d) 20mg/g starch, (e) 25mg/g starch 26
Fig. 5. Plot of lnω versus ln G'(○), G"(□), η*(△) for corn starch dispersion at 25℃ 29
Fig. 6. Plot of ln G', G" for octenylsuccinated corn starch dispersions at 25℃: (●) 0mg/g starch, (○) 10mg/g starch, () 15mg/g starch, (□) 20mg/g starch, (▲) 25mg/g starch. (a) G' and (b) G" 30
Fig. 7. Comparison of steady flow viscosity (ηa) and complex viscosity (η*) for octenylsuccinated corn starch dispersion. closed symbol:ηa, open symbol: η*. (a) 0mg/g starch, (b) 10mg/g starch, (c) 15mg/g starch, (d) 20mg/g st 34
Table 1. Effect of OSAn content on power law model parameters (n, K) and apparent viscosity (ηa,of octenylsuccinated corn starch dispersion at25, 40 and 55℃ 17
Table 2. Yield Stress for Casson (σoc) and Herschel-Bulkley (σh) model at different temperatures (25, 40 and 55℃) 18
Table 3. Activation energies (Ea) of octenylsuccinated corn starch dispersion with different OSAn concentrations 23
Table 4. Slopes and intercepts (Pa·s) of ln (G', G") versus ln frequency (rad/s) data of octenylsuccinated corn starch dispersions at 25℃ 31