고려대학교

목차

ABSTRACT i
국문 초록 iii
ACKNOWLEDMENTS v
TABLE OF CONTENTS vi
LIST OF TABLES viii
LIST OF FIGURES viii

CHAPTER 1. INTRODUCTION 1
CHAPTER 2. THEORETICAL BACKGROUND 3
2.1. Polymeric membrane 3
2.2. Nonsolvent Induced Phase Separation (NIPS) 4
2.3. Thermally Induced Phase Separation (TIPS) 8
2.4. N-TIPS (NIPS-TIPS) 11
2.5. Surface treatment using photocatalysis 15
2.5.1 Photocatalytic mechanism 16
2.5.2 Differences in TiO2 crystal structure between anatase and rutile 17
2.5.3 Fabrication and application of TiO₂ thin films via the sol-gel process 18
2.5.4 Enhancing photocatalytic efficiency through Pt doping in TiO2 19
2.5.5 Surface treatment using HaPHy (Humidity assisted Photochemical
Hydroxylation) Technology 20
CHAPTER 3. MATERIALS 24
CHAPTER 4. METHOD 24
4.1. Membrane preparation 24
4.1.1 Fabrication of PCL membrane via phase separation 24
4.1.2 Hydroxyl group induced surface treatment using a photocatalyst on PCL membrane 25
4.1.3 Surface modification with Hexamethylene diisocyanate (HDI) 25
4.1.4 Grafting and crosslinking 4-arm Polyethylene glycol (PEG) 25
4.2. Membrane characterization 29
4.3. Membrane performance 29
CHAPTER 5. RESULTS 32
5.1 Characterization of PCL semipermeable membrane 32
5.1.1 Contact angle 32
5.1.2. Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy (ATR-FTIR) 32
5.1.3. Field Emission-Scanning Electron Microscopy (FE-SEM) 33
5.2 Performance of PCL semipermeable membrane 37
5.2.1 Water permeation flux and BSA Rejection rate 37
CHAPTER 5. CONCLUSION 41
REFERENCES 43