In this study, the bio-nanocomposite composed of chitosan and nanoclay was prepared by solution intercalation method. The membrane was subsequently fabricated by dry/wet phase separation technique. The structure of bio-nanocomposite was characterized by Fouriertransform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) and scanning electron microscope (SEM). | Vietnam Journal of Science and Technology 56 (2A) (2018) 174-178 PREPARATION OF BIO-NANOCOMPOSITE MEMBRANE FOR METHYLENE BLUE ADSORPTION Nguyen Thai Ngoc Uyen, Nguyen Thi Nhan, Do Thi Vi Vi, Ha Thuc Chi Nhan* Faculty of Materials Science and Technology, VNU University of Science, 227 Nguyen Van Cu, Ho Chi Minh City, Viet Nam * Email: htcnhan@ Received: 10 March 2018; Accepted for publication: 14 May 2018 ABSTRACT In this study, the bio-nanocomposite composed of chitosan and nanoclay was prepared by solution intercalation method. The membrane was subsequently fabricated by dry/wet phase separation technique. The structure of bio-nanocomposite was characterized by Fouriertransform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) and scanning electron microscope (SEM). The membrane was applied to adsorb methylene blue (MB) for water treatment. The adsorption of MB was monitored through UV-Vis spectroscopy. The results showed that bionanocomposite membrane could adsorb MB up to % in 150 min. The MB adsorption of bionanocomposite membrane was 234 times as high as the adsorption of the conventional chitosan films that is promising for environmental applications. Keywords: bio-nanocomposite membrane, methylene blue adsorption, chitosan, nanoclay. 1. INTRODUCTION Bionanocomposite is a ‘green’ nanocomposite associated with remarkable properties. Therefore, the study on application of bionanocomposite in environmental treatment has been attracted many attentions [1-5]. In this study, we combined two environmental friendly materials that are chitosan (CS) and nanoclay (MMT). These materials are available in Vietnam with relatively low cost and are an effective materials for organic contaminant treatment [2-4]. However, the study of chitosan/nanoclay bionanocomposite as adsorbents for removing organic pollutants such as methylene blue is only a few. On the other hands, membrane is a material which has been widely used to separate the pollutants. .
