Synthesis and characterization of polyaniline, graphene and graphene polyaniline nanocomposites
| dc.contributor.author | Chin Seik Yee | |
| dc.date.accessioned | 2021-05-17T08:43:11Z | |
| dc.date.available | 2021-05-17T08:43:11Z | |
| dc.date.issued | 2018-08-01 | |
| dc.description.abstract | Recently, nanocomposites with graphene and conducting polymers have attracted considerable attention because of their superior electrical conductivity. The main aim of this study is to enhance electrical conductivity of polyaniline (PANI) by addition of functionalized graphene. The objectives of the present study are divided into two parts. In the first part, effect of using sodium dodecylbenzenesulfonate (SDBS) as surfactant and two different methods to synthesize PANI (conventional single-phase and interfacial polymerization) are considered in the study. In the second part, graphene were synthesized through electrochemical exfoliation of graphite with different electrochemical applied bias of 5V and 10V. The graphene/PANI-SDBS nanocomposites have been synthesized through a simple one-step interfacial polymerization by varying the amount of graphene content. Results indicate that more uniform with smaller diameter (55 nm) of PANI nanofibers are produced using interfacial polymerization. The growth of PANI nanofibers into agglomeration was successfully suppressed with the addition of SDBS during the interfacial polymerization of PANI. The low applied bias, 5V yields thin graphene sheets with relatively low defect (ID/IG=0.36), enhanced thermal stability as well as show high electrical conductivity of 2.53 ×10-1 S/cm. The morphological analysis via field emission scanning (FESEM) and high resolution transmission electron microscopy (HRTEM) showed that PANI nanofibers tend to coat on the surfaces of graphene sheets. The nanocomposites containing 5 wt% graphene content exhibit the highest electrical conductivity of 2.53 ×10-1 S/cm, which is four orders of magnitude higher than that of PANI (9.99 ×10-6S/cm). The thermal stability and electrical conductivity of nanocomposites was found to be improved with the increased in graphene content. | en_US |
| dc.identifier.uri | http://hdl.handle.net/123456789/13426 | |
| dc.language.iso | en | en_US |
| dc.title | Synthesis and characterization of polyaniline, graphene and graphene polyaniline nanocomposites | en_US |
| dc.type | Thesis | en_US |
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