생분해성고분자/층상실리케이트 나노복합체 분리막의 제조와 투과특성

다국어 초록 (Multilingual Abstract)

Biodegradable polymer/layered silicate nanocomposite membranes were prepared by solution casting method for the application of dehumidification and gas separation. The cationic biopolymer, chitosan was intercalated into clay through cationic exchange and hydrogen bonding process. X-ray diffraction was used to investigate structure of biodegradable polymer/layered silicate nanocomposite membranes. D-spacing of the characteristic peak of clay plate in biodegradable polymer/layered silicate nanocomposite membranes was moved to toward lower angle values and diminished. These results confirmed that biodegradable polymer/layered silicate nanocomposite membranes made a intercalated structure.
Thermal stability and the mechanical properties of the nanocomposite membranes were characterized by TGA and Universal Testing Machine. Thermal stability and mechanical properties were enhanced by increasing clay contents in biodegradable polymer/layered silicate nanocomposite membranes.
Gas permeation properties of the nanocomposite membranes were measured by time-lag methods. Permeability of the CO2 gas through chitosan nanocomposite membranes and the N2, O2, CO2 gas through PLA nanocomposite membranes decreased as the content of clay in the nanocomposite increased. Water vapor transmission and dynamic vapor sorption(DVS) of chitosan nanocomposite membranes when the content of clay increased. Due to extended tortuosity of permeation path of the gases.

목차 (Table of Contents)

• 1. 서론 1
• 1) 키토산의 분리막에의 응용 3
• 2) Poly(lactic acid)의 분리막에의 응용 17
• 3) 고분자/층상실리케이트 나노복합체 38
• 2. 실험 장치 및 방법 48
• 1) 재료 48
• 2) 제조 과정 51
• 3) 분석 52
• 3. 결과 및 고찰 55
• 1) 생분해성고분자/층상실리케이트 나노복합체 분리막의 구조 55
• 2) 생분해성고분자/층상실리케이트 나노복합체 분리막의 열적 특성 62
• 3) 생분해성고분자/층상실리케이트 나노복합체 분리막의 기계적 특성 68
• 4) 생분해성고분자/층상실리케이트 나노복합체 분리막의 투과 특성 73
• 4. 결론 84
• 참고문헌 86