PEGmonosuccinate와 키토산 컴플렉스의 제조

소개

PEGmonosuccinate를 합성하고 이를 키토산과 컴플렉스시킨 용액를 제조한후 그특성을 조사하였다.

목차

1. INTRODUCTION
2. EXPERIMENTAL
2.1. Materials
2.2. Preparation of Chitosan-PEGmonosuccinate polyelectrolyte complex films.
2.3. Measurement
2.3.1. Solutions properties
2.3.2. Films properties
3. RESULTS AND DISCUSSION
3.1. Solutions properties
3.1.1. Observation of dissolution behavior of chitosan and phase transition phenomenon.
3.1.2. pH and Viscosity
3.1.3. IR spectra
3.1.4. Cell viability assay(MTT staining)
3.2. Films properties
3.2.1. Mechanical properties
3.2.2. Thermal properties
3.2.3. Morphology and Surface resistance
3.2.4. Moisture regain and Water content
4. CONCLUSION
5. REFERENCE

본문내용

1. INTRODUCTION

The term "polyelectrolyte" is employed for polymer systems consisting of a "macroion," i.e., macromolecule carrying covalently bound anionic or cationic groups, and low-molecular "counterions" securing for electroneutrality.1) Macromolecular complexes of different polymers are bound through intermolecular interactions, such as hydrogen bonding, Coulomb forces, Van Der Waals forces and transfer forces. According to the nature of interactions the complexescan be divided into: (1) Polyelectrolyte complexes, (2) charge-transfer, (3) hydrogen-bonding complexes, (4) stereocomplexes. Polyelctrolyte complex (PEC) was prepared by the formation of complexes from the interaction of oppositely charged polymers.2) The mechanism and properties of polymer complexes depend on the charge ration of anionic-to-cationic polymers, the degree of neutralization, flexibility, functional group structure, charge density, stereo regularity, and temperature.3) Polyelectrolyte complexes have been applied for stabilizer, thickener, gelling agents, superabsorbance, flocculants, coating or polyelectrolyte complex membranes for special separation processes or microencapsulation.

참고자료

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