Chemical Grafting of Crosslinked Polypyrrole and Poly(vinyl Chloride) onto Modified Graphite: Fabrication, Characterization, and Material Properties

Naz, Asima; Sattar, Rabia; Ahmed, Zahoor

doi:10.1080/25740881.2020.1725569

Cited by 4 publications

(4 citation statements)

References 46 publications

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“…Based on energy transition and energy level structure analyses, it is concluded that the absorption of photon takes place by π-π* transition of C=O group and transference of energy occurs by energy level transition from C=O to C-C and C-O groups. As a result, C-C and C-O bonds breakdown from main and branch chains of polymer molecules [ 17 , 18 , 22 , 26 , 27 ]. It was noticed from the C 1s spectrum of PANi/PMMA/PPG-b-PEG-b-PPG@FG that, in addition to the increase in peak intensity of C-N and O-C=O, there was also disappearance of the C-O peak at 288.3 eV indicating a grafting reaction of PPG-b-PEG-b-PPG on PMMA.…”

Section: Resultsmentioning

confidence: 99%

“…There are numerous investigations focusing on exfoliated graphite composites with a variety of polymers such as polystyrene (PS) [ 14 , 15 , 16 ], low-density polyethylene (LDPE) [ 3 ], polyaniline (PANi) [ 5 ] and polypyrrole (PPy)/copolymers [ 6 , 17 , 18 ]. In all aforementioned studies, EG significantly enhanced the electrical conductance performances of the prepared blends/nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

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Hierarchical Polyaniline Core-Shell Nanocomposites Coated on Modified Graphite for Improved Electrical Conductivity Performance

et al. 2022

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Graphite has recently gained scientific and industrial attention due to its high electrical conductivity. In the current endeavor, a new way to fabricate novel and multifunctional nanocomposites using functional graphite (FG) as filler is presented. The fabrication of multilayered conducting composites of PANi/PMMA/PPG-b-PEG-b-PPG was carried out via in situ polymerization, using polyaniline (PANi), poly(methyl methacrylate) (PMMA) and block copolymer as matrices in the presence of FGfiller. The growth of PANi chains is manifested by PMMA due to the formation of H-bonding between imine and carbonyl groups of PANi and MMA units, respectively, and are responsible for ion exchange sites. FTIR spectroscopy was used for structural elucidation of composites while elemental analysis was accomplished by XPS and EDX spectroscopy. The morphology of the prepared PANi/PMMA/PPG-b-PEG-b-PPG@FG composites was inspected by the SEM. The structure and crystallinity of the composites was investigated via XRD. The improved thermal stability and properties of the nanocomposites were observed using TGA and DSC. The conductivity measurements were used to characterize the electrical conductivity performance of the resulting composites. The presence of functional filler as well as polyaniline shows a significant contribution towards the enhancement of electrical conductivity of PANi/PMMA/PPG-b-PEG-b-PPG@FG nanocomposites.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hierarchical Polyaniline Core-Shell Nanocomposites Coated on Modified Graphite for Improved Electrical Conductivity Performance

et al. 2022

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“…However, it is possible to form polymer/GO composite and subsequently induce oxidization to form conjugated PPy, which can further enhance the binding to GO. [ 63,64 ]…”

Section: Resultsmentioning

confidence: 99%

Bifunctional RAFT Agent Directed Preparation of Polymer/Graphene Oxide Composites

Hsia

Wan

Fan

et al. 2021

Macromol. Rapid Commun.

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Polymer/graphene oxide (GO) composites, which combine the physical properties of GO and the processability of polymers, are of increasing interest in a variety of applications ranging from conductive foams, sensors, to bioelectronics. However, the preparation of these composites through physical blending demands the polymers with functional groups that interact strongly with the GO. Here the design and synthesis of a new bifunctional reversible addition–fragmentation chain transfer (RAFT) agent are demonstrated, which allows the synthesis of polymers with predetermined molecular weights and low dispersibilities (Ð), while having functionalities at both polymer termini that allow strong binding to GO. To access polymers with diverse thermal and mechanical properties, acrylonitrile–styrene–acrylate (ASA) copolymers with different types of acrylates, both short and long side chains, are synthesized under the control of the bifunctional RAFT agent. Furthermore, the strong binding between GO and the synthesized polymers is verified and explored to prepare polymer/GO composites with diverse tensile strengths and conductivity in the range of semiconductors. Overall, this novel RAFT agent is expected to expand the utility of polymer/GO composites by providing well‐defined polymers with tunable properties and strong binding with GO.

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“…The Ppy/graphene sensor is one of the most widely utilized conducting polymers for ammonia sensing due to its high conductivity, easy synthesis process, and great environmental stability [ 269 ]. The oxidised Ppy is stable under ambient conditions and high temperatures of greater than 300 °C [ 267 ].…”

Section: Organic Conducting Polymer Nanocompositementioning

confidence: 99%

Recent Advances in Graphene-Based Nanocomposites for Ammonia Detection

2022

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The increasing demand to mitigate the alarming effects of the emission of ammonia (NH3) on human health and the environment has highlighted the growing attention to the design of reliable and effective sensing technologies using novel materials and unique nanocomposites with tunable functionalities. Among the state-of-the-art ammonia detection materials, graphene-based polymeric nanocomposites have gained significant attention. Despite the ever-increasing number of publications on graphene-based polymeric nanocomposites for ammonia detection, various understandings and information regarding the process, mechanisms, and new material components have not been fully explored. Therefore, this review summarises the recent progress of graphene-based polymeric nanocomposites for ammonia detection. A comprehensive discussion is provided on the various gas sensor designs, including chemiresistive, Quartz Crystal Microbalance (QCM), and Field-Effect Transistor (FET), as well as gas sensors utilising the graphene-based polymer nanocomposites, in addition to highlighting the pros and cons of graphene to enhance the performance of gas sensors. Moreover, the various techniques used to fabricate graphene-based nanocomposites and the numerous polymer electrolytes (e.g., conductive polymeric electrolytes), the ion transport models, and the fabrication and detection mechanisms of ammonia are critically addressed. Finally, a brief outlook on the significant progress, future opportunities, and challenges of graphene-based polymer nanocomposites for the application of ammonia detection are presented.

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Chemical Grafting of Crosslinked Polypyrrole and Poly(vinyl Chloride) onto Modified Graphite: Fabrication, Characterization, and Material Properties

Cited by 4 publications

References 46 publications

Hierarchical Polyaniline Core-Shell Nanocomposites Coated on Modified Graphite for Improved Electrical Conductivity Performance

Hierarchical Polyaniline Core-Shell Nanocomposites Coated on Modified Graphite for Improved Electrical Conductivity Performance

Bifunctional RAFT Agent Directed Preparation of Polymer/Graphene Oxide Composites

Recent Advances in Graphene-Based Nanocomposites for Ammonia Detection

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