Anis Sakinah Zainal Abidin
@ptsn.mypolycc.edu.my
Lecturer
Politeknik Tun Syed Nasir Syed Ismail
RESEARCH, TEACHING, or OTHER INTERESTS
Engineering, Chemical Engineering, Polymers and Plastics, Environmental Engineering
Scopus Publications
Scopus Publications
F S Ismail, K Yusoh, A S Zainal Abidin, A H Abdullah, and Z Ismail
IOP Publishing
AbstractLiquid phase exfoliation (LPE) with surfactant-assisted is a method to produce graphene that used water and surfactant as solvent. Tea is one of possible surfactants that can be used in LPE of graphite as it reduced the surface tension energy of water (72.75 mJ m−2) to ~40 – 50 mJ m−2which is suitable level to exfoliate graphite. Three different types of tea were used as surfactant through one-step production of graphene which were green tea (GT), black tea (BT) and oolong tea (OT). The exfoliation of graphite in each tea solutions were successful as the UV spectra of supernatant samples show peak at 270 nm which indicates the C – C bond of graphene flakes. Morphology analysis (AFM) of resulted graphene samples show that graphene sheets have sharp edges caused by sonication process. The effect of sonication time was being investigated in this work. Green tea has higher exponent factor of time (1.715) compare to black tea (1.033) and oolong tea (0.762) due to high quantity of small molecules of polyphenols present in green tea solution. Thus, it is better to used GT as surfactant in LPE of graphite compare to BT and OT.
Abu Hannifa Abdullah, Zulhelmi Ismail, Anis Sakinah Zainal Abidin, and Kamal Yusoh
Elsevier BV
Anis Sakinah Zainal Abidin, Kamal Yusoh, Shaidatul Shima Jamari, Abu Hannifa Abdullah, and Zulhelmi Ismail
Springer Science and Business Media LLC
Abu Hannifa Abdullah, Zulhelmi Ismail, Anis Sakinah Zainal Abidin, Fadwa Sameeha Ismail, and Kamal Yusoh
IOP Publishing
Graphene is known as a wonder materials that can be used to enhance the properties of nanocomposites. In this work, PVA/Graphene nanocomposite was fabricated using simple solution method. The photograph of the nanocomposite samples shown the transparency of the sample reduced as the graphene content increase. The photograph also shown the PVA and the modified graphene are miscible and compatible. The XRD of the samples proved the exfoliation of graphene in the nanocomposite and the result of the thermal property improvement for the sample is confirmed by the TGA.
Zulhelmi Ismail, Abu Hannifa Abdullah, Anis Sakinah Zainal Abidin, and Kamal Yusoh
Springer Science and Business Media LLC
Zulhelmi Ismail, Abu Hannifa Abdullah, Anis Sakinah Zainal Abidin, and Kamal Yusoh
Springer Science and Business Media LLC
Zulhelmi Ismail, Nurul Farhana Abu Kassim, Abu Hannifa Abdullah, Anis Sakinah Zainal Abidin, Fadwa Sameha Ismail, and Kamal Yusoh
IOP Publishing
A kitchen mixer is one of the possible tools for the exfoliation of graphene. While organic solvents such as NMP or DMF are suitable for the exfoliation of graphite, the majority are toxic and dangerously harmful when exposed to humans and the environment. Therefore, an alternative solvent must be proposed for green and sustainable production of graphene. In this initial work, we have developed a new synthesis method for graphene through the direct exfoliation of graphite in commercial black tea. We found that our maximum yield concentration of graphene is Y = 0.032 mg ml−l after 15 min of mixing. From the data of Raman, the level of defects in our produced graphene is suggested as being very minor (ID/IG = 0.17), despite possible graphene functionalization by oxygen groups in tea. Incorporation of our graphene into PMMA results in shifting the onset temperature from 300 °C to 326 °C, which impressively validates the potential of the produced graphene as a thermal reinforcement material for polymer composites.
A. S. Zainal Abidin, K. Yusoh, S. S. Jamari, A. H. Abdullah, and Z. Ismail
Author(s)
Polybutylene succinate (PBS) was being grafted with octadecylamine-functionalized graphene oxide (GO-ODA) to produce novel PBS/GO-ODA nanocomposites by solution blending technique. Alkylated graphene oxide has superhydrophobic surface thus improved the affinity of the filler with low polar polymer such as PBS. The structure and compatibility of the filler and nanocomposites were being characterized using Fourier transform infrared spectroscopy (FTIR), Universal tensile machine (UTM) and thermogravimetric analysis (TGA). Enhancement of tensile strength and Young’s modulus by 30% and 165% respectively was achieved with cooperation of 0.5% GO-ODA loading. The functionalization of GO-ODA in PBS matrix leads to the improvement in the nanocomposites properties.
Chantara Thevy Ratnam, Suganti Ramarad, Mohd Khalid Siddiqui, Anis Sakinah Zainal Abidin, and Luqman TG Chuah
SAGE Publications
In an attempt to maximize the beneficial effect of irradiation, the influence of multifunctional acrylates (MFAs) such as trimethylol propane triacrylate, ethylene glycol dimethacrylate, trimethylol propane trimethacrylate, and tripropylene glycol diacrylate on the 90/10 ethylene vinyl acetate/waste tire dust (EVA/WTD) were studied. The 90/10 EVA/WTD and EVA-containing 4 phr MFA prepared using a Haake mixer at 140°C and 50 r min−1 rotor speed. The blends were then irradiated using a 3.0-MeV electron beam machine. Results on gel fraction revealed that EVA/WTD blends were cross-linked by electron beam irradiation. Among the MFA employed in this studies, TPGDA was found to render highest tensile strength with the best retention in elongation at break and increased heat of fusion and crystallinity of blends upon irradiation. The changes in the properties of EVA/WTD blends upon irradiation are attributed to the cross-linking of the EVA matrix. The changes in crystallinity and crystalline melting temperatures of EVA/WTD blends upon irradiation are discussed in detail.