Facile surface modification of graphene nanoplatelets (GNPs) using covalent ATPS-dehydration (GNPs-ATPS) and non-covalent polyetherimide adsorption (GNPs-PEI) method

Abd Razak, Jeefferie and Haji Ahmad, Sahrim and Ratnam, Chantara Thevy and Yaakub , Juliana and Mohd Abid, Mohd Asyadi Azam and Zainal Abidin, Muhammad Zaimi and Abd Manaf, Mohd Edeerozey and Mohamad, Noraiham (2014) Facile surface modification of graphene nanoplatelets (GNPs) using covalent ATPS-dehydration (GNPs-ATPS) and non-covalent polyetherimide adsorption (GNPs-PEI) method. Applied Mechanics and Materials, 761. pp. 391-396. ISSN 1660-9336 (In Press)

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Abstract. Graphene nanoplatelets (GNPs), a newly discovered nanomaterial, promise a great potential in many technological applications. However, the direct usage of GNPs was limited due to several surface property factors that require innovative modifications and treatments. In this study, the GNPs surface treatment is carried out by using a covalent and non-covalent approach. The success of the treatment was determined and evaluated through the Raman and FTIR spectroscopy analysis, FESEM, TEM and XRD morphological observation. A strong vibration of Raman peak at 2081.11 cm-1 represent a possible covalent bonding of C=C due to the ATPS-silane treatment, while the characteristic peak at 1013.82 cm-1 indicates the aromatic ring nature of polyimide that noncovalently associated with C-H and C-C, as well as C-O-C linkage from the polyether. From the IR spectroscopy, the covalent treatment on GNPs was occurred through the dehydration mechanism while hydrogen bonding in the multiple structures of –OH that associated to the carboxylic acids was obviously involved for non-covalent treatment of GNPs. TEM observation of GNPs-PEI (polyetherimide) revealed a unique phenomenon of a polymeric adsorption as represented by a nanosize gray dot morphology in between of the GNPs platelets. In overall, the facile procedure of the surface treatment that was applied in this study is reliable to yield a different type of GNPs characteristic of covalent and non-covalent surface active, which may open up broad possibilities for various cutting edges applications.

Item Type: Article
Uncontrolled Keywords: graphene nanoplatelets, covalent treatment, dehydration, non-covalent treatment,polymeric adsorption, silane functionalization
Subjects: T Technology > TS Manufactures
Q Science > QD Chemistry
Q Science > QC Physics
Divisions: Faculty of Manufacturing Engineering > Department of Engineering Materials
Depositing User: En. Jeefferie Abd Razak
Date Deposited: 21 May 2015 09:01
Last Modified: 28 May 2015 04:38
URI: http://eprints.utem.edu.my/id/eprint/14474
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