Synthesis, physical properties, and characterization of starch-based blend films by adding nano-sized TiO2/poly(methyl metacrylate-co-acrylamide)

Authors

  • Yeon-Hum Yun,

    1. School of Applied Chemical Engineering, Chonnam National University, 300 Yongbong-Dong, Bukgu, Gwangju 500757, South Korea
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  • Kyung-Jun Hwang,

    1. Department of Chemical and Biochemical Engineering, Chosun University, 375 Seosuk-Dong, Donggu, Gwangju 501759, South Korea
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  • Young-Jung Wee,

    1. Department of Food Science and Technology, Yeungnam University, 214-1 Dae-Dong, Gyeongsan, Gyeongbuk 712-749, South Korea
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  • Soon-Do Yoon

    Corresponding author
    1. School of Applied Chemical Engineering, Chonnam National University, 300 Yongbong-Dong, Bukgu, Gwangju 500757, South Korea
    • School of Applied Chemical Engineering, Chonnam National University, 300 Yongbong-Dong, Bukgu, Gwangju 500757, South Korea
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Abstract

The purpose of this study was to improve the physical properties and to expand the application range of starch-based blend films added nano-sized TiO2/poly(methyl methacrylate-co-acrylamide) (PMMA-co-AM). Starch-based blend films were prepared by using corn starch, polyvinyl alcohol (PVA), nano-sized PMMA-co-AM, nano-sized TiO2/PMMA-co-AM particles, and additives, i.e., glycerol (GL) and citric acid (CA). Nano-sized PMMA-co-AM was synthesized by emulsion polymerization and TiO2 nanoparticles were also prepared by using sol–gel method. Nano-sized TiO2/PMMA-co-AM particles were synthesized by wet milling for 48 h. The morphology and crystallinity of TiO2, nano-sized PMMA-co-AM and TiO2/PMMA-co-AM particles were investigated by using the scanning electron microscope (SEM) and X-ray diffractometer (XRD). In addition, the functional groups of the TiO2/PMMA-co-AM particles were characterized by IR spectrophotometry (FTIR). The physical properties such as tensile strength (TS), elongation at break (%E), degree of swelling (DS), and solubility (S) of starch-based films were evaluated. It was found that the adding of nano-sized particles can greatly improve the physical properties of the prepared films. The photocatalytic degradability of starch/PVA/nano-sized TiO2/PMMA-co-AM composite films was evaluated using methylene blue (MB) and acetaldehyde (ATA) as photodegradation target under UV and visible light. The degree of decomposition (C/C0) of MB and ATA for the films containing TiO2 and CA was 0.506 and 0.088 under UV light irradiation and 0.586 (MB) and 0.631 (ATA) under visible light irradiation, respectively. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

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