Park Byeongho, Lee Wonoh, Lee Eunhee, Min Sa Hoon, Kim Byeong-Su
Department of Chemistry and Department of Energy Engineering, Low Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST) , Ulsan 689-798, Korea.
ACS Appl Mater Interfaces. 2015 Feb 11;7(5):3329-34. doi: 10.1021/am5082364. Epub 2015 Jan 29.
The performance of fiber-reinforced composites is governed not only by the nature of each individual component comprising the composite but also by the interfacial properties between the fiber and the matrix. We present a novel layer-by-layer (LbL) assembly for the surface modification of a glass fiber to enhance the interfacial properties between the glass fiber and the epoxy matrix. Solution-processable graphene oxide (GO) and an aramid nanofiber (ANF) were employed as active components for the LbL assembly onto the glass fiber, owing to their abundant functional groups and mechanical properties. We found that the interfacial properties of the glass fibers uniformly coated with GO and ANF multilayers, such as surface free energy and interfacial shear strength, were improved by 23.6% and 39.2%, respectively, compared with those of the bare glass fiber. In addition, the interfacial adhesion interactions between the glass fiber and the epoxy matrix were highly tunable simply by changing the composition and the architecture of layers, taking advantage of the versatility of the LbL assembly.
纤维增强复合材料的性能不仅取决于构成复合材料的每个单独组分的性质，还取决于纤维与基体之间的界面性能。我们提出了一种新颖的逐层（LbL）组装方法，用于玻璃纤维的表面改性，以增强玻璃纤维与环氧基体之间的界面性能。由于其丰富的官能团和机械性能，可溶液加工的氧化石墨烯（GO）和芳纶纳米纤维（ANF）被用作在玻璃纤维上进行LbL组装的活性组分。我们发现，与裸玻璃纤维相比，均匀涂覆有GO和ANF多层膜的玻璃纤维的界面性能，如表面自由能和界面剪切强度，分别提高了23.6%和39.2%。此外，利用LbL组装的多功能性，只需改变层的组成和结构，就可以高度调节玻璃纤维与环氧基体之间的界面粘附相互作用。
