| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Outline of Final Research Achievements |
Chemical crosslinking of various polysaccharides including xylan, glucomannan, and curdlan were investigated in order to improve mechanical strength of polysaccharide materials. Soft, tough and flexible curdlan hydrogels were obtained after covalent cross-linking of curdlan (CD) using ethylene glycol diglycidyl ether as a cross-linker. CD hydrogels were highly tough and did not fracture under compression to 90% strain. CD hydrogel could recover the original shape and elastic modulus after 90% compression, indicating its high flexibility. Subsequently, hydroxyl groups of CD hydrogels were acetylated in acetic anhydride and pyridine system to give hydrophobic property, and novel CD organogels were obtained. CD organogels were swollen in chloroform and resistant to repeated drying and swelling treatment in chloroform. This study demonstrated the possibility of CD gel for novel soft and tough material derived from nature.
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