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RRJOMS | Volume 5 | Issue 4 | July, 2017

July 27-29, 2017 Vancouver, Canada

International Conference on

Emerging Materials and Nanotechnology

Res. Rev. J Mat. Sci. 2017

DOI: 10.4172/2321-6212-C1-003

Effect of clay modification and preparation method on crystallization behavior, thermal stability and

flammability of isotactic polypropylene/organoclay nanocomposites

M M Enezi, L A Al Juhaiman

and

W K Mekhamer

King Saud University, KSA

n the present study, isotactic polypropylene (PP)/local organoclay (OC) nanocomposites were prepared by two different

methods, namely extrusion and casting method. Cationic surfactant, Hexadecylpyridiniumchloride(CPC) is used to modify

the Khulays clay from Saudi Arabia after saturating its surface with Na+ ions. The crystalline structure and properties of OC

and PP /OC were investigated by FTIR, XRD, DSC, TEM, SEM to establish the correlation between the preparation method

and the degree of clay intercalation/exfoliation in PP matrix. Using simple combustion apparatus, the effect of organoclay

content on the flammability behavior of the PP/organoclay was investigated by horizontal burning tests for HB classification,

Underwriters Laboratories (UL94). The above investigations reveal that PP/OC nanocomposites prepared by extrusion have

the most extensive dispersion of OC particles and high levels of exfoliation compared to that prepared by casting method. The

vertical burning tests results showed increase in the ignition time and significant reduction of flame propagation rate of PP/

organoclay nanocomposites compared to neat PP

Magnetic and photocatalytic response of Ag-doped ZnFeO nano-composites for photocatalytic

degradation of reactive dyes in aqueous solution

Waheed A Al Masry

and

Asif Mahmood

King Saud University, KSA

o investigate the photocatalytic degradation of reactive dyes in aqueous solution, pure ZnO and Fe/Agdoped magnetic

photocatalysts having nominal compositions of Zn0.95-xFe0.05AgxO (x = 0.0, 0.05 and 0.1) have been synthesized via

self-consistent sol-gel based auto-combustion route. Thermally stable samples were subsequently confirmed to exhibit wurtzite

type hexagonal structure, characteristic of ZnO. The nature of chemical bonding was elaborated by Fourier transform analysis.

Electron microscopic techniques were employed to investigate the structural morphology and to evaluate the particle size.

Ferromagnetic nature of the Fe/Ag doped samples was revealed by vibrating sample magnetometry, enabling the photocatalytic

samples to be re-collectedmagnetically for repeated usage.The enhanced photocatalytic activity in the degradation of methylene

blue under UV light irradiation with 5 and 10 wt.% Ag/ZnFeO has been observed validating the potential applications of these

materials in the field of photo-degradation of organic pollutants