Soft, tough, and flexible curdlan hydrogels and organogels fabricated by covalent cross-linking
Soft, tough, and flexible curdlan hydrogels and organogels fabricated by covalent cross-linking
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DOI：
10.1016/j.polymer.2016.08.032
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发表时间：
2016-09
期刊：
影响因子：
4.6
通讯作者：
Yukiko Enomoto-Rogers;S. Kimura;T. Iwata
中科院分区：
文献类型：
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作者：
Yukiko Enomoto-Rogers;S. Kimura;T. Iwata
以乙二醇二缩水甘油醚（EGDGE）为交联剂，通过共价交联可得然胶（CD）制备了柔软、坚韧的CD水凝胶。通过单轴压缩实验研究了凝胶的力学性能。CD水凝胶表现出非线性弹性行为。CD水凝胶的弹性模量为0.004-0.011 kPa。CD水凝胶是高度坚韧的，并且在最大90%应变的压缩下不断裂。凝胶在压缩过程中可以保留水，并且没有水从凝胶中挤出。此外，CD水凝胶在90%压缩后可以恢复到原来的形状和弹性模量，表明其具有较高的柔韧性。随后，在乙酸酐和吡啶体系中对CD水凝胶的羟基进行乙酰化，使其具有疏水性，得到了新型CD有机凝胶。CD有机凝胶在氯仿中溶胀，并且耐氯仿中的反复干燥和溶胀处理。
Soft, tough and flexible curdlan (CD) hydrogels were fabricated by covalent cross-linking of CD using ethylene glycol diglycidyl ether (EGDGE) as a cross-linker. The mechanical properties of the gels were investigated by uniaxial compression test. CD hydrogels showed non-linear elastic behavior. The elastic modulus of CD hydrogels was 0.004–0.011 kPa. CD hydrogels were highly tough and did not fracture under compression to 90% strain at the maximum. The gels could retain water during compression, and no water was squeezed out from the gel. In addition, 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 organogel were swollen in chloroform and resistant to repeated drying and swelling treatment in chloroform.