Hydrogen-bonding layer protecting polyelectrolyte capsules and its mechanical property study with atomic force microscope.
Hydrogen-bonding layer protecting polyelectrolyte capsules and its mechanical property study with atomic force microscope.
复制标题
DOI：
10.1166/jnn.2008.156
复制
发表时间：
2008-06
影响因子：
--
通讯作者：
L. Ge;Xing Wang;Long Ba;Zhongze Gu
中科院分区：
文献类型：
--
作者：
L. Ge;Xing Wang;Long Ba;Zhongze Gu
采用层层自组装方法制备了尺寸约为6微米的氢键多层聚电解质胶囊。分别用扫描电子显微镜（SEM）、共焦激光扫描显微镜（CLSM）和原子力显微镜（AFM）观察所得胶囊的形貌。利用 AFM 研究了胶囊的弹性特性。胶囊由不同长度的悬臂压制，悬臂末端粘有玻璃珠。力曲线是在空气中的胶囊上测量的。获得了胶囊的杨氏模量（载荷 E = 170 MPa）。结果表明，该模型可以预测微胶囊的弹性变形。采用中等刚度的悬臂可以保证聚合物胶囊弹性变形的准确性。我们的结果表明，与纯多层聚电解质胶囊相比，氢键层的存在使得多层聚电解质更硬。
The hydrogen-bonding multilayered polyelectrolyte capsules with sizes around 6 microm were fabricated by layer-by-layer self-assembly method. The morphology of the obtained capsules was observed with Scanning Electron Microscope (SEM), Confocal Laser Scanning Microscope (CLSM) and Atomic Force Microscope (AFM), respectively. The elastic properties of the capsules were studied with AFM. The capsule was pressed by cantilever with different lengths, a glass bead glued at the end of the cantilever. The force curves were measured on the capsule in air. The Young's modulus of the capsule was obtained (E = 170 MPa for the loading). Results show that this model can predict the elastic deformation of the microcapsule. The accuracy of the elastic deformation of polymer capsule can be ensured using a cantilever of mediate stiffness. Our results show that the existence of the hydrogen-bonding layer makes the multilayered polyelectrolyte harder in comparison with the pure multilayered polyelectrolyte capsules.