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Unique pressure sensitive carbon nanotubes based polymer nanocomposites
( Syed Muhammad Imran Hassan ),( Shao Godlisten Namwel ),박성수,( Haider Muhammad Salman ),( Nadir Abbas ),전순정,( Manwar Hussain ) 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
In this study we have synthesized unique flexible pressure sensitive nanocomposites prepared by solution mixing method by adding multi walled carbon nanotubes (MWCNT) in the thermoplastic urethane (TPU) along with poly(methyl methacrylate) (PMMA) beads of different sizes i.e. 5 μm, 10 μm and 20 μm. The electrical and thermal conductivities of the nanocomposites were studied under different applied pressures. Electrical response of the nanocomposites under different applied pressure demonstrated that these nanocomposites are suitable to be used as pressure sensing materials since they show repeatability in their electrical response when external pressure was applied on them repeatedly.
( Syed Muhammad Imran Hassan ),김희택,박성수,전순정,( Haider Muhammad Salman ) 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
This study introduces a systematic approach to disperse graphene oxide (GO) during emulsion polymerization of Polyaniline (PANI) to form nanocomposites with improved electrical conductivities. The polymerization process was carried out in the presence of a functionalized protonic acid such as dodecyl benzene sulfonic acid (DBSA), which acts both as an emulsifier and protonating agent. The microstructures of the PANI/GO nanocomposites were studied by SEM, TEM, X-Ray diffraction, UV-Vis spectrometry, Fourier transform infrared and Thermogravimetric analyses. Meanwhile, the electrical conductivities of the nanocomposite pellets pressed at different applied pressures were determined using the four probe analyzer. The addition of GO was essential component to improve the thermal stability and electrical conductivities of the PANI/GO nanocomposites. An enhanced conductivity of 474 S/m was observed at 5 wt. % GO loading and applied pressure of 6 tons.
( Syed Muhammad Imran Hassan ),( Shao Godlisten Namwel ),박성수,전순정,김희택 한국공업화학회 2014 한국공업화학회 연구논문 초록집 Vol.2014 No.1
This study introduces a systematic approach to disperse graphene oxide (GO) during emulsion polymerization of Polyaniline (PANI) to form nanocomposites with improved electrical conductivities. PANI/GO samples were fabricated by loading different weight percents (wt %) of GO through modified in-situ emulsion polymerization of the aniline monomer. Nanocomposites were studied by scanning electron microscopy and transmission electron microscopy; X-Ray diffraction; UV-Vis spectrometry; Fourier transform infrared, differential thermal and Thermogravimetric analyses. The electrical conductivities of the nanocomposite pellets pressed at different applied pressures were determined using the four probe analyzer. PANI/GO nanocomposites with desirable properties can be used for various semiconductor applications.
Highly efficient extraction process for the recovery of Mg ion and Mg compound from ferronickel slag
박성수,( Syed Muhammad Imran Hassan ),( Shao Godlisten Namwel ),전순정,김희택 한국공업화학회 2014 한국공업화학회 연구논문 초록집 Vol.2014 No.1
In this study we demonstrated a method for the effective leaching of Mg ions and Mg compound of high purity from ferronickel slag, which is a waste product of the Stainless steel production process. Ferronickel slag contains useful components like MgO and SiO<sub>2</sub> in a high amount but the slag is usually simply dumped in sea. Economical extraction of these useful components from the waste slag will not only help us to recover valuable components at low cost but also help to improve environment. We used hydrochloric acid to obtain Mg brine from ferronickel slag, Mg solution and Iron oxide were separated via oxidation process and finally titration was done to obtain MgO through the calcination at 750°C. X-ray fluorescence, Laser Diffraction Method and X-ray diffraction analysis were performed to monitor the effectiveness of leaching in the slag.
Highly efficient extraction process for the Mg ion and Mg compound from ferronickel slag
박성수,( Syed Muhammad Imran Hassan ),( Shao Godlisten Namwel ),전순정,김희택 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
Ferronickel slag is a by-product obtained for the production of Ferronickel alloy. It is composed of Silica, Magnesium Oxide, Iron Oxide and heavy metals. Due to lack of process research method almost of Ferronickel slags wasted of mainly buried at landfill, despite it can be used as a valuable product. The present study establishes a suitable approach to extract valuable components from the slag. Initially SA(sulfuric acid) was used to leach MgO from the slag. In order to establish the optimum conditions suitable for separating oxides from the slag, the leaching process was carried out at different molar concentrations of SA(2-8M), leaching time (2-8h), and temperatures (30-80°C). X-ray fluorescence, X-ray diffraction and scanning electron microscopy analysis were performed to monitor the effectiveness of leaching in the slag. It was observed that leaching of Mg and Fe, and Al oxides increased significantly with increasing molar concentration of the acids from 2 to 8M. However, the optimum conditions of the leaching process were at a molar concentration, temperature and leaching time of 6M, 80°C, 6 h, respectively.
( Haider Muhammad Salman ),김희택,( Syed Muhammad Imran Hassan ),( Manwar Hussain ),( Shao Godlisten Namwel ) 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
Improving the life time of water treatment membranes can be achieved through exquisite control of the active disinfectant release. The Ppresent study demonstrates a comparison between PES-Gr-AgNPs, PES-CNT-AgNPs and aminenated PES-AgNPs composite polymer membrane for silver release to check the life time of water treatment membrane. Antibacterial activities of the samples were carried out to investigate the disinfection performance of the samples on the Gram negative bacteria (Escherichia coli). A predominant relation between Silver release and disinfection was accessed using the as-synthesized membranes. The physical-chemical properties of the samples were examined by XRD, SEM-EDAX, and HRTEM analyses.