Modification of graphene with two strong acids and its nanocomposites with 2-hydroxyethylcellulose

Kilic E., PEKEL BAYRAMGİL N.

RESULTS IN CHEMISTRY, cilt.4, 2022 (ESCI) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 4
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1016/j.rechem.2022.100544
  • Dergi Adı: RESULTS IN CHEMISTRY
  • Derginin Tarandığı İndeksler: Emerging Sources Citation Index (ESCI), Scopus
  • Anahtar Kelimeler: Graphene, Cellulose, Biocomposite, Thermal properties, Surface analysis, Casting, HYDROXYETHYL CELLULOSE, DOPED GRAPHENE, OXIDE, COMPOSITES, NANOSHEETS, DEGRADATION, FABRICATION, CHEMISTRY, CHITOSAN, FILMS
  • Hacettepe Üniversitesi Adresli: Evet

Özet

Simple and cost-effective, eco-friendly, graphene-based "green" nanocomposite films are produced with the solvent casting method. For this purpose, commercially procured nanographene was used as reinforcement material and 2-hydroxyethyl cellulose (2-HEC), a cellulose-derivative natural polymer, was used as a matrix. Nanographene was modified with HCl and HNO3 to ensure blending with the cellulose matrix, and 2-HEC/acid modified graphene nanocomposite films were produced. The results show that the basic structure of the graphene is preserved after the HCl and HNO3 modifications. FT-IR, XRD, and Raman Spectroscopy results show that the graphene attained hydrophilic property by creating functional ends (hydroxyl group, -OH) on the edges of the graphene sheet with acid modification. Morphology studies with SEM and AFM methods have also confirmed the acid modification to the graphene. TGA/DTG work revealed that nanocomposite films obtained as a result of the doping of HNO3 modified graphene to the 2-HEC matrix were found to be thermally more stable than the original 2-HEC film. In this study, where 2-HEC is used as a matrix, the hydrophilic property has been achieved with the hydrophobic graphene by acid modification. The resulting 2-HEC/acid modified graphene nanocomposite ma-terials have the potential to lead to innovation in applications such as lithium-ion batteries and sensor design, water treatment and even drug delivery systems.