표제지
목차
국문요약 11
1. 서론 13
2. 이론 18
2.1. 기체투과이론 18
2.2. 비다공성 막 19
2.3. Free volume 21
2.4. 용해-확산 이론 22
2.5. poly(ether-block-amide) (PEBAX) 25
2.6. Graphene oxide (GO) 27
2.7. Polyethylenimine (PEI) 30
2.8. Zeolite imidazolate framework-8 (ZIF-8) 33
3. 실험 36
3.1. 시료 및 시약 36
① Poly(ether-block-amide) 2533 (PEBAX 2533) 36
② Isopropanol 36
③ n-butanol 36
④ Graphite flake 36
⑤ Sulfuric acid 36
⑥ Phosphoric acid 37
⑦ Potassium permanganate 37
⑧ Hydrogen peroxide 37
⑨ Sieve 37
⑩ Hydrochloric acid 37
⑪ Ethyl alcohol 37
⑫ Polyethylenimine (PEI, branched) 38
⑬ Zinc nitrate hexahydrate 38
⑭ 2-methylimidazole 38
⑮ Methyl alcohol 38
⑯ Nitrogen Gas 38
⑰ Carbon dioxide Gas 38
3.2. 분석 및 분석기기 39
3.3. 합성 및 막 제조 방법 40
3.3.1. Graphene oxide (GO) 합성 40
3.3.2. Polyethylenimine-Graphene oxide (PEI-GO) 합성 41
3.3.3. Polyethylenimine-Graphene oxide@Zeolite imidazoleate framework-8 (PEI-GO@ZIF-8) 합성 42
3.3.4. Mixed-matrix membranes (MMMs) 제조 43
3.4. GO, PEI-GO, PEI-GO@ZIF-8의 특성 분석 44
3.4.1. FT-IR 44
3.4.2. XRD 44
3.4.3. TGA 44
3.5. PEBAX/GO, PEBAX/PEI-GO, PEBAX/PEI-GO@ZIF-8의 특성 45
3.5.1. 막 두께 측정 45
3.5.2. FT-IR 45
3.5.3. TGA 45
3.5.4. SEM 45
3.5.5. GPA 46
4. 결과 및 고찰 47
4.1. GO, PEI-GO, PEI-GO@ZIF-8의 특성 47
4.1.1. FT-IR 47
4.1.2. XRD 49
4.1.3. TGA 51
4.2. PEBAX/GO, PEBAX/PEI-GO, PEBAX/PEI-GO@ZIF-8의 특성 53
4.2.1. FT-IR 53
4.2.2. TGA 57
4.2.3. SEM 59
4.2.4. GPA 64
5. 결론 84
참고문헌 87
ABSTRACT 96
Figure 1. Mechanism of gas permeation through non-porous membrane. 20
Figure 2. Graphene oxide barrier behavior. 20
Figure 3. Mechanism of solution-diffusion theory in three steps. 24
Figure 4. PEBAX 2533 chemical structure. 26
Figure 5. Graphite structure. 29
Figure 6. Graphene oxide (GO) structure. 29
Figure 7. Branched polyethylenimine (PEI) structure. 32
Figure 8. Polyethylenimine-Graphene oxide (PEI-GO) structure. 32
Figure 9. Zeolite imidazolate framework-8 (ZIF-8) structure. 35
Figure 10. Schematic diagram of gas permeation apparatus. 46
Figure 11. FT-IR spectra of GO, PEI. PEI-GO, ZIF-8, PEI-GO@ZIF-8. 48
Figure 12. XRD patterns of GO, PEI-GO, PEI-GO@ZIF-8. 50
Figure 13. TGA thermogram of GO, PEI-GO, PEI-GO@ZIF-8. 52
Figure 14. FT-IR spectra of PEBAX/GO mixed matrix membranes. 54
Figure 15. FT-IR spectra of PEBAX/PEI-GO mixed matrix membranes. 55
Figure 16. FT-IR spectra of PEBAX/PEI-GO@ZIF-8 mixed matrix membranes. 56
Figure 17. TGA thermogram of PEBAX/GO, PEBAX/PEI-GO, PEBAX/PEI-GO@ZIF-8 mixed matrix membranes. 58
Figure 18. The cross-section of PEBAX 2533 membrane. 60
Figure 19. The cross-section of PEBAX 2533/GO 0.5wt% membrane. 61
Figure 20. The cross-section of PEBAX 2533/PEI-GO 0.5wt% membrane. 62
Figure 21. The cross-section of PEBAX 2533/PEI-GO@ZIF-8 0.5wt% membrane. 63
Figure 22. N₂ permeability of PEBAX/GO mixed matrix membranes. 66
Figure 23. CO₂ permeability of PEBAX/GO mixed matrix membranes. 66
Figure 24. CO₂/N₂ selectivity of PEBAX/GO mixed matrix membranes. 68
Figure 25. N₂ permeability of PEBAX/PEI-GO mixed matrix membranes. 71
Figure 26. CO₂ permeability of PEBAX/PEI-GO mixed matrix membranes. 71
Figure 27. CO₂/N₂ selectivity of PEBAX/PEI-GO mixed matrix membranes. 73
Figure 28. N₂ permeability of PEBAX/PEI-GO@ZIF-8 mixed matrix membranes. 75
Figure 29. CO₂ permeability of PEBAX/PEI-GO@ZIF-8 mixed matrix membranes. 75
Figure 30. CO₂/N₂ selectivity of PEBAX/PEI-GO@ZIF-8 mixed matrix membranes. 77
Figure 31. N₂ permeability of PEBAX/GO, PEI-GO, PEI-GO@ZIF-8 mixed matrix membranes. 80
Figure 32. CO₂ permeability of PEBAX/GO, PEI-GO, PEI-GO@ZIF-8 mixed matrix membranes. 81
Figure 33. Gas permeation of PEBAX/GO, PEI-GO, PEI-GO@ZIF-8 mixed matrix membranes with Robeson upper-bound. 83
Figure 34. Gas permeation of PEBAX/PEI-GO mixed matrix membranes and other references with Robeson upper-bound. 83