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In-Situ Synthesized Myoglobin Imprinted Poly(N-Isopropylacrylamide)/Silica Nanocomposite Gels by Using the Molecular Imprinting Method

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Advances in Materials Physics and Chemistry 2014年第1期4卷 1-5页

作者： Burcu Meshur Eylem Turan nursel dilsiz Department of Chemical Engineering Faculty of EngineeringGazi UniversityAnkaraTurkey Department of Chemistry Faculty of Art and ScienceGazi UniversityAnkaraTurkey

Temperature sensitive imprinted poly(N-isopropylacrylamide) nanocomposite gels were syntheses via in-situ, free radical crosslinking polymerization of corresponding monomer in nano-sized silica and five different concentrations of myoglobin solution by using the molecular imprinting method. Mb adsorption from five different concentrations of Mb solutions was investigated by two types of nanocomposite gel systems prepared by non-imprinted and imprinted methods. Nanocomposite gels imprinted with Mb showed higher adsorption capacity and specificity for Mb than nanocomposite gels prepared by the usual procedure. The highest Mb adsorption was observed via the imprinted nanocomposite gels with 12.5% Mb. In addition, selectivity studies were also performed by using two reference molecules as fibrinogen and hemoglobin. The imprinted nanocomposite gels had higher adsorption capacity for Mb than the non-imprinted gels and also exhibited good selectivity for Mb and high adsorption rate depending on the number of Mb sized cavities.

关键词： Nanocomposite Gels Poly(N-Isopropylacrylamide) Temperature Sensitive Myglobin Free Radical Crosslinking Polymerization Adsorption Imprinted

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Plasma Surface Functionalization of Biaxially Oriented Polypropylene Films with Trimethyl Borate

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Advances in Materials Physics and Chemistry 2011年第2期1卷 50-55页

作者： nursel dilsiz Hande Yavuz Suleyman Corekci Mehmet Cakmak Department of Chemical Engineering Gazi UniversityAnkaraTurkiye Department of Physics Kirklareli UniversityKirklareliTurkey Department of Physics Gazi UniversityAnkaraTurkiye

The radiofrequency plasma (13.56 MHz) was employed to polymerize trimethyl borate (TMB) monomer/N2 gas mixture on the surface of biaxially oriented polypropylene (BOPP) films. Plasma polymer coated polypropylene films were examined by flame retardancy test (limiting oxygen index, LOI). The highest LOI value calculated for the untreated BOPP sample was 18.4 (v/v O2%) and 24.2 (v/v O2%) for the 55 W 30 minutes treated sample. The plasma polymers were characterized by FTIR spectroscopy and AFM. According to the FTIR results, the -OH, B-CH3, B-O, and BH2 functional groups were detected. It was found that the highest surface roughness belonged to 40 W 30 min treated BOPP sample which was calculated as 9.78 nm (10 μm × 10 μm). Moreover, the wettability of the modified BOPP film surfaces was characterized via contact angle measurements. The water contact angle values have decreased from 109.6? to the lowest value of 68.2? after the plasma treatment. The results showed that TMB/N2 plasma modification could be used as an alternative method for the enhancement of flame retardancy and hydrophilicity of BOPP film.

关键词： Polypropylene Film Trimethyl Borate Plasma Treatment Flame Retardancy Hydrophilicity

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