School of Materials and the Northwest Composites Centre, University of Manchester, Paper Science Building, Sackville Street, Manchester M13 9PL, UK.
Nanotechnology. 2011 Aug 12;22(32):325706. doi: 10.1088/0957-4484/22/32/325706. Epub 2011 Jul 20.
Cyclic tensile and compressive deformation is applied to cellulose nanowhisker-epoxy resin based model nanocomposites. The molecular deformation of the cellulose nanowhiskers within the epoxy resin matrix is followed using a Raman spectroscopy technique, whereby shifts in the position of a band located at ∼ 1095 cm(-1) are shown to correlate directly with a breakdown in the interfaces between the resin and the nanowhiskers and between nanowhiskers themselves. A theoretical model is used to determine the dissipation of energy at the interfaces between whiskers and at the whisker-matrix interface. This approach is shown to be useful for interpreting the local micromechanics of these materials by providing a quantitative measure of the quality of the interface.
周期性的拉伸和压缩变形被应用于基于纤维素纳米纤维-环氧树脂的模型纳米复合材料。纤维素纳米纤维在环氧树脂基质中的分子变形使用拉曼光谱技术进行跟踪，其中位于约 1095 cm(-1)处的波段的位置偏移被证明与树脂和纳米纤维之间以及纳米纤维自身之间的界面破裂直接相关。一个理论模型被用于确定在纤维和纤维-基质界面之间的界面处的能量耗散。这种方法通过提供界面质量的定量测量，被证明对解释这些材料的局部微观力学是有用的。
