Kwon Soon-Min, Kim Hun-Sik, Jin Hyoung-Joon
Department of Polymer Science and Engineering, Inha University, Incheon 402-751, Korea.
J Nanosci Nanotechnol. 2009 Dec;9(12):7204-8. doi: 10.1166/jnn.2009.1616.
A new monolithic organic cryogel was synthesized from a silk fibroin/multiwalled carbon nanotube (MWCNT) hydrogel by the freeze-drying method in order to maintain the silk fibroin network. The silk fibroin/MWCNT hydrogel was prepared by the regeneration of silk fibroin using an aqueous silk fibroin solution in which MWCNTs were dispersed by in-situ methods. It was observed that the formation of the silk fibroin/MWCNT hydrogel was accelerated by increasing the MWCNT concentration. Fourier transform infrared spectrum analysis, X-ray diffraction, nitrogen adsorption-desorption, and electron microscopy analysis techniques were used to characterize the silk fibroin/MWCNT cryogel. The MWCNTs were embedded in the silk fibroin based cryogel with disordered porous structures. In addition, the MWCNTs induced a change in the crystal structure of the silk fibroin and also increased the proportions of micropores and mesopores in the supermacroporous cryogels when they were introduced in the appropriate amounts.
为了维持丝素蛋白网络，通过冷冻干燥法从丝素蛋白/多壁碳纳米管（MWCNT）水凝胶合成了一种新型整体有机冷冻凝胶。丝素蛋白/MWCNT水凝胶是通过使用丝素蛋白水溶液再生丝素蛋白制备的，其中MWCNTs通过原位方法分散。观察到通过增加MWCNT浓度可加速丝素蛋白/MWCNT水凝胶的形成。使用傅里叶变换红外光谱分析、X射线衍射、氮吸附-解吸和电子显微镜分析技术对丝素蛋白/MWCNT冷冻凝胶进行表征。MWCNTs嵌入具有无序多孔结构的丝素蛋白基冷冻凝胶中。此外，当以适当的量引入MWCNTs时，它们会引起丝素蛋白晶体结构的变化，并且还增加了超大孔冷冻凝胶中微孔和中孔的比例。
