Patole, S. P., Arif, M. F. and Kumar, S. (2018) Polyvinyl alcohol incorporated buckypaper composites for improved multifunctional performance. Composites Science and Technology, 168, pp. 429-436. (doi: 10.1016/j.compscitech.2018.10.010)
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Abstract
Carbon nanotubes (CNT) and graphene have been recognized as superior nanomaterials for high-performance, lightweight and multifunctional composites. However, non-uniform CNT/graphene dispersion within the polymer matrix, imperfect interphase between CNT/graphene and polymer matrix have hindered significant improvements in composite performance. In this study, we present a water-based grafting approach to produce polyvinyl alcohol (PVA) incorporated CNT buckypaper and CNT-graphene hybrid buckypaper composites with enhanced mechanical performance (tensile and fracture) and electrical conductivity. Our approach provides a wide range of composition for CNT (5–77 wt.%) and PVA matrix (23–95 wt.%) without compromising the uniformity of CNT dispersion and polymer matrix homogeneity. The composite buckypapers have lightweight with a density of 168 mg/cc (lighter than daily use copy papers having a density of 740 mg/cc). They show an electrical conductivity of 82 S/cm which is five orders higher than the neat PVA films (10−5 S/cm) and three orders higher than the previous reports. Overall, 600% improvement in the Young's modulus and 80% improvement in the tensile strength with an optimum PVA loading is observed. They also exhibit a strong linear piezoresistive response. The water absorption changes their mechanical (tensile and Mode I fracture), electrical and piezoresistive performance. The cross-sectional fracture SEM images are used to understand the failure mechanisms. The results suggest that the developed approach would be an effective method for the fabrication of high-performance, lightweight, multifunctional composite buckypaper.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Kumar, Professor Shanmugam |
| Authors: | Patole, S. P., Arif, M. F., and Kumar, S. |
| College/School: | College of Science and Engineering > School of Engineering > Systems Power and Energy |
| Journal Name: | Composites Science and Technology |
| Publisher: | Elsevier |
| ISSN: | 0266-3538 |
| ISSN (Online): | 1879-1050 |
| Published Online: | 15 October 2018 |
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