Innes James R, Young Robert J, Papageorgiou Dimitrios G
Polymer IRC, Faculty of Engineering and Informatics, University of Bradford, Richmond Road, Bradford BD7 1DP, UK.
National Graphene Institute, Henry Royce Institute and Department of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, UK.
Polymers (Basel). 2022 Mar 17;14(6):1204. doi: 10.3390/polym14061204.
In this work, we evaluated the processing and reinforcement characteristics of both carbon black (CB) and graphene nanoplatelets (GNPs) within a nitrile butadiene rubber (NBR) matrix. The aspect ratio of the GNPs was measured using atomic force microscopy (AFM) and related to the dispersion and agglomeration within the NBR matrix, as observed by scanning electron microscopy (SEM). The relationship between GNP aspect ratio and mechanical properties was studied by micromechanical modelling. The tensile and tear properties of NBR after compounding with GNPs were enhanced to a greater extent compared to carbon black, while curing times were smaller and scorch times longer, indicating some of the advantages of using GNPs. Overall, the inherent properties of GNPs along with their geometry led to the production of better-performing rubber compounds that can replace their CB-filled counterparts in applications where flexibility, tear strength and compliance are important. The influence of processing on dispersion, orientation and agglomeration of flakes was also highlighted with respect to the Young's modulus of the NBR compounds.
在本研究中，我们评估了丁腈橡胶（NBR）基体中炭黑（CB）和石墨烯纳米片（GNP）的加工及增强特性。使用原子力显微镜（AFM）测量了GNP的长径比，并将其与扫描电子显微镜（SEM）观察到的NBR基体中的分散和团聚情况相关联。通过微观力学建模研究了GNP长径比与力学性能之间的关系。与炭黑相比，NBR与GNP共混后的拉伸和撕裂性能得到了更大程度的提高，同时硫化时间更短，焦烧时间更长，这表明了使用GNP的一些优势。总体而言，GNP的固有特性及其几何形状使得能够生产出性能更优的橡胶复合材料，在柔韧性、撕裂强度和顺应性至关重要的应用中，这些复合材料可以替代填充炭黑的同类材料。关于NBR复合材料的杨氏模量，还强调了加工对薄片的分散、取向和团聚的影响。
