Sunita Rattan; Prachi Singhal; Devesh Kumar Avasthi; Ambuj Tripathi
Abstract
Ion implantation is a surface treatment process in which the surface of a sample is bombarded with a beam of energetic dopant ions to implant ions into the matrix of the substrate. In the present work, nanocomposites of poly(3,4-ethylenedioxy thiophene) /poly(4-styrene sulphonate) (PEDOT: PSS) and nanographite ...
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Ion implantation is a surface treatment process in which the surface of a sample is bombarded with a beam of energetic dopant ions to implant ions into the matrix of the substrate. In the present work, nanocomposites of poly(3,4-ethylenedioxy thiophene) /poly(4-styrene sulphonate) (PEDOT: PSS) and nanographite are prepared and subjected to swift heavy ion implantation using the same ion as that of the filler in the nanocomposites. PEDOT: PSS/ nanographite nanocomposites have been synthesized by solution blending method. The prepared PEDOT: PSS/ nanographite nanocomposite films were irradiated with carbon ions (C ion beam, 50 MeV) in fluence range of 3 × 10 10 to 3 × 10 12 ions/cm 2 . The nanocomposite films were characterized by scanning electron microscope (SEM) and X-ray diffraction (XRD) before and after C ion implantation and were evaluated for their electrical and sensor properties. SEM and XRD studies clearly depict the homogeneous dispersion of nanograhite in polymer matrix along with densification of the polymer nanocomposite. The implanted nanocomposites exhibit better electrical and sensor properties for the detection of nitroaromatics.
Sunita Rattan; Teena Sehgal
Abstract
Radiation grafting of the Track Etched Membranes (TEMs) is a versatile tool for the formation of stimulus responsive membranes which change their permeation properties in response to environmental stimuli such as pH or temperature. Stimuli-responsive polymeric membranes have attracted the attention of ...
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Radiation grafting of the Track Etched Membranes (TEMs) is a versatile tool for the formation of stimulus responsive membranes which change their permeation properties in response to environmental stimuli such as pH or temperature. Stimuli-responsive polymeric membranes have attracted the attention of researcher all around the world owing to their potential applications in the fields of controlled drug delivery, bio separation, water treatment, and chemical sensors. Acrylic acid (AAc), well known for its novel pH-sensitive behavior in aqueous media was successfully grafted on the surface and in the pores of polycarbonate track etched membrane (PCTE). The influence of reaction parameters such as monomer concentration, reaction time, temperature and concentration of the initiator on the grafting yield was investigated in detail. The membranes were characterized through Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM) techniques. The pH-responsive behaviour of the PCTE-g-AAc membranes was studied. The PCTE-g-AAc membranes exhibit fast and reversible response to the environmental pH.
