표제지
목차
국문 초록 10
I. 서론 11
1. EGCG와 폴리페놀-금속 구조체 11
2. 2차원 물질 13
2-1. MXene 13
2-2. Graphene oxide 14
3. 3차원 물질 15
3-1. 모발 15
3-2. Titanium dioxide 16
II. 실험 재료 및 방법 18
1. 실험재료 18
2. MXene 나노 시트의 준비 19
2-1. MXene의 박리 및 환원 19
2-2. 박리된 MXene의 특성 분석 19
3. 2차원 소재 및 모발과 EGCG-금속 구조체 20
3-1. EGCG-금속 구조체를 이용한 2차원 소재와 모발 결합 20
3-2. 2차원 소재가 결합된 모발의 특성 분석 20
4. 나노 무기 분체와 EGCG-금속 구조체 22
4-1. 나노 무기 분체 표면 EGCG-금속 구조체 박막의 제조 22
4-2. 박막 코팅된 나노 무기 분체의 특성 분석 22
III. 결과 및 고찰 24
1. 2차원 소재와 모발의 결합 24
1-1. MXene의 박리 24
1-2. MXene EGCG-금속 구조체의 형성 28
1-3. 2차원 소재 및 EGCG-금속 구조체와 모발의 결합 29
1-4. 모발의 특성 변화 32
2. 나노 무기 분체 표면의 EGCG 고정화 36
2-1. 박막의 형성 36
2-2. EGCG 고정화에 의한 갈변 현상 개선 및 항산화능의 유지 39
2-3. EGCG-금속 구조체에 의한 광 독성의 변화 43
IV. 결론 47
참고문헌 49
ABSTRACT 58
Table 1. XPS peak fitting results for MXene after reduction. 26
Table 2. Zeta potential value of MXene by MPN binding. 28
Table 3. Tensile strength equation. 33
Figure 1. Structures of catechins. 12
Figure 2. A schematic illustration of MXene adhering to hair using metal phenolic networks. 17
Figure 3. Adsorbed EGCG metal phenolic networks on TiO₂ substrates. 17
Figure 4. A schematic illustration of MXene delamination process. 24
Figure 5. Images of delaminated Ti₃C₂ flakes. (a-b) SEM images, (b-c) TEM images. (d) Inset shows the selected area electron... 25
Figure 6. Component peak-fitting of XPS spectra. (a) Ti 2p, (b) C 1s, (c) O 1s, and (d) F 1s after reduction. 26
Figure 7. UV-vis absorption spectra of MXene. 27
Figure 8. Schematic illustration and SEM image of hair. (a) Untreated hair. (b) Hair only treated with MXene. (c) Hair only treated with... 30
Figure 9. Quenching effect of 2D material and MPN. (a-b) Fluorescence intensity in ethanol-water solution (25 %, v/v). (c-e) Images of hair... 31
Figure 10. UV protection of MXene. (a) UV-Vis transmittance spectra of MXene coated quartz. The red line represents quartz with a thin... 32
Figure 11. Effect of surface coating on the tensile strength and thickness of hair. (a) Tensile strength (b) Thickness. The marks... 33
Figure 12. Radical scavenging activity MXene and EGCG. (a) Inhibition graph of hair coated with MXene and EGCG. (b) Graphs showing the... 34
Figure 13. Antibacterial activity determined by paper disc method. (a) Cutibacterium acnes, (b) Malassezia furfur. 35
Figure 14. TEM images of TiO₂ MPN. (a-b) TiO₂ treated at 100μM MPN. (c-d) Once-treated TiO₂ at 1000M MPN. (e-f) Twice-treated... 37
Figure 15. Thermogravimetric analysis of TiO₂ MPN. 38
Figure 16. Zeta potential of TiO₂ MPN prepared at different pH values. 38
Figure 17. Gradual whitening of TiO₂ MPN. (a) Photographs of TiO₂ MPN dispersion for 3 weeks. (b) Diffuse reflection spectrum of TiO₂... 40
Figure 18. TEM images of TiO₂ MPN with sunlight. (a) TiO₂ MPN before exposure to light. (b) TiO₂ MPN whitened by exposure to light. 41
Figure 19. DPPH radical scavenging activity(%) over 3 weeks. The black line represents 100μM EGCG, the blue line represents 200μM... 42
Figure 20. Reactive oxygen species(ROS) generation in TiO₂ rutile depending on MPN concentration. TiO₂ was exposure to 20mW·cm-2...[이미지참조] 44
Figure 21. Photocatalytic activity of TiO₂. (a) Ligand to metal charge transfer(LMCT) between TiO₂ and EGCG. (b) Fenton-like process... 44
Figure 22. Effects of TiO₂ MPN on HaCaT cell viability after sunlight exposure. MTT assay was performed using rutile phase(a-b) and... 46