tailieunhanh - Preparation of positively charged membrane from natural rubber latex blending with chitosan

Miscibility of NRL and chitosan in solution was investigated by using dynamic mechanical thermal analysis (DMTA) and found that chitosan incorporated with NRL less than 40 weight percentage (wt%) was partially miscible. Films of the chitosan blending with higher NRL contents exhibited two peaks of glass transition temperatures. Interfacial polarization and dielectric properties of polymer films were improved with increasing NRL contents. Chemical structure of the blends were characterized by using attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR). | Communications in Physics, Vol. 24, No. 3S1 (2014), pp. 51-56 DOI: PREPARATION OF POSITIVELY CHARGED MEMBRANE FROM NATURAL RUBBER LATEX BLENDING WITH CHITOSAN WIRACH TAWEEPREDA AND SUPAWADEE TUAYBUT Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla 90110, Thailand SINEENART PUANGMANEE Faculty of Environmental Management, Prince of Songkla University, Hat-Yai, Songkhla 90110, Thailand TRAN DANG KHOA Department of Bionanotechnology, Faculty of Physic engineering and Nanotechnology, University of Engineering and Technology, Vietnam National University, Hanoi E-mail: Received 04 June 2014 Accepted for publication 24 August 2014 Abstract. Film formation of natural rubber latex (NRL) blending with various concentrations of chitosan were investigated. Atomic force microscopy (AFM) images clearly showed that the NRL film covered chitosan phase. Roughness of the film which was calculated from AFM image was increased with increasing chitosan concentration. Miscibility of NRL and chitosan in solution was investigated by using dynamic mechanical thermal analysis (DMTA) and found that chitosan incorporated with NRL less than 40 weight percentage (wt%) was partially miscible. Films of the chitosan blending with higher NRL contents exhibited two peaks of glass transition temperatures. Interfacial polarization and dielectric properties of polymer films were improved with increasing NRL contents. Chemical structure of the blends were characterized by using attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR). Keywords: natural rubber, chitosan, magnetic, dielectric, AFM I. INTRODUCTION Chitosan from sea shell is a well-known membrane material for water-alcohol pervaporation [1, 2], carbon dioxide selective [3], direct methanol fuel cell [4], protein separation and concentration [5], moreover, chitosan acts as a chelating agent for heavy