No abstract

No abstract

No abstract

A novel polymeric nanocomposite pour point depressant (PPD), based on Nickel Ferrite and (Polymethyl methacrylate -PMMA) polymer was synthesized and characterized. In this research the sample prepared in tow steps, the first step included prepared the sample to be ablated by using mixing kneading method formed as a Circular tablet contain Nickel Ferrite/PMMA. Then the sample ablated by using Nd:YAG laser with (1064 nm) wavelength,(600 mJ) energy,(6Hz) frequency and (100 pulses) for the tow sample which immersed in dilute Crude Oil (obtained from the Rumaila Oil Field in Southern Iraq). The optical properties of samples showed that the same behaviour but with blue shifting. The rheological properties showed that the viscosity increased as the polymer increased in samples uneven stability in the value of viscosity of the sample has low polymer ratio. The density almost doubled with same ablations' pulses.

No abstract

No abstract

The graphene oxide was prepared by the modified Hammer method, and then the rGO-TiO2 nano composite was successfully created using Q-switch Nd:YAG pulsed laser(λ=1064 nm, Energy per pulse 1000 mJ, No. of pulses 500, and the pulse duration 10 n sec) (PLAL). Prepared nanomaterials were characterized by a variety of techniques, including UV-Vis. spectroscopy, X-ray diffraction (XRD), FTIR, Field emission scanning electron microscopy (FE-SEM) and EDX. The absorption peak of GO is equal to 230 nm with energy gap 5.391 eV while The edge of absorption for the TiO2-rGO nanocomposite displays a red shift with respect of pure TiO2. Crystallite size of prepared TiO2/rGO nanocomposite was measured by XRD and is equal to 53.97 nm. The intensity of peaks C=C and peaks O-H is lower compared to peaks of pure graphene oxide, indicating the transformation of graphene oxide into reduced graphene oxide. The TiO2/rGO nanocomposite show enhanced adsorption properties. The removal efficiency of GO is 37 %, and The removal effectiveness for rGO-TiO2 nanocompound is 40 %. The TiO2-rGO nanocomposite has high dye adsorption efficiency, and Can be used for the elimination of the Rh B from aqueous solution.