| 초록 |
Aligned pores are one of the most interesting morphology in achieving super porous hydrogels. Directional freezing is a simple, eco-friendly technique for producing aligned pores. Microfibrilated cellulose, an eco-friendly and reinforcing material for composite hydrogels was obtained by hydrolysis of bacterial cellulose. The aligned microspores were fabricated in PNIPAm and its composite hydrogels with MFC by directional freezing. The composite hydrogel was prepared by incorporating the MFC fibers within PNIPAm network using unidirectional freezing then subsequent photopolymerisation. The morphology of micropores and its influence were studied by Field Emission Scanning Electron Microscopy, swelling ratio, rheological properties and contact angle measurement. The reduction in elastic modulus and increase in swelling ratio is influenced significantly by directional freezing. The kinetics of contact angle measurements and morphologies confirms the aligned micropores. |
