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3.3. SEM micrographs of PLGA/PHBV scaffold The morphology of the pure PLGA scaffold and PLGA/PHBV scaffolds containing different amount of PHBV microspheres were shown in Fig. 3. The SEM graphs (A, B, C and D) showed the bonding between PHBV microspheres and PLGA matrix. The PHBV microspheres were distributed all across the PLGA matrix and most of them were buried in the PLGA matrix which might make them hard to separate from the matrix. Graphs A, C and E demonstrated that all of the three kinds of scaffold possessed interconnected porous structure. It can be observed from graphs A and C that the addition of PHBV microspheres made the morphology of the PLGA/PHBV scaffold much rougher than that of pure PLGA scaffold. However, with the increase of PHBV microspheres, the pore size of PLGA/PHBV scaffolds changed little. The PLGA matrix walls were decorated with PHBV microspheres which can be seen from graphs B and D and they were seldom influenced by PHBV microspheres, which can be convinced by the well-connected walls. |
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转身丶忘不掉: 金币+50, 翻译EPI+1, ★★★★★最佳答案, 非常感谢你的回复,我很满意，很棒！谢谢你哈！ 2014-12-11 20:18:23
转身丶忘不掉: 金币+50, 翻译EPI+1, ★★★★★最佳答案, 非常感谢你的回复,我很满意，很棒！谢谢你哈！ 2014-12-11 20:18:23
| 纯PLGA骨架和含有不同量PHBV微球的PLGA / PHBV支架的形态如图3所示。SEM谱图（A,B,C和D）显示了PHBV微球和PLGA基质间的连接。PHBV微球分布遍及整个PLGA基质，其中大部分被掩埋在PLGA基质，这可能使得他们难以从基质中分离出来。图A，C和E表明，这三种骨架都具有三维连通的多孔结构。从曲线图A和C可以看出，PHBV微球的加入使得PLGA / PHBV骨架比纯PLGA骨架形态更粗糙。然而，随着PHBV微球的增加， PLGA / PHBV骨架的孔径变化不大。从曲线B和D可以看出，PLGA基质壁上装饰有PHBV微球，却很少被PHBV微球影响，这一点可以从连通性好的基质壁上得到证明。 |
2楼2014-12-11 16:19:35