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Processing and Characterization of Glycerol-Plasticized Soy Protein Plastics Reinforced with Citric Acid-Modified Starch Nanoparticles

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Abstract

Citric acid-modified starch nanoparticles with an average size of 82 nm were prepared through precipitation from gelatinized starch solution by ethanol and further modification with citric acid. When being incorporated in glycerol-plasticized soy protein plastics, citric acid-modified starch nanoparticles displayed dramatic reinforcing effect. The resulted nanocomposite plastics exhibited improvement in mechanical performance. Also, the water uptake decreased, indicating an increase of water resistance. The modified starch nanoparticles had a good compatibility with soy protein matrix. Possessing a relative hydrophobic surface, the filler would prefer to interact with protein-rich domains in glycerol-plasticized soy protein. The work provided a green approach of biodegradable materials based on naturally occurring biopolymers.

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Acknowledgments

This work was supported by the National High Technology Research and Development Program of China (863 Program, 2006AA100216), Special Foundation for Technology Development and Research Projects of Scientific Research Institutes, Ministry of Science and Technology of China (NCSTE-2007-JKZX-016), Innovation Fund for minor enterprises, Ministry of Science and Technology of China (07C26141101015).

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Beijing Technology and Business University, 100048, Beijing, China

    Huafeng Tian & Guozhi Xu

  2. Institute of Plastics Processing and Application of Light Industry, Beijing Technology and Business University, 100048, Beijing, China

    Guozhi Xu

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  1. Huafeng Tian
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  2. Guozhi Xu
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Correspondence to Huafeng Tian.

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Tian, H., Xu, G. Processing and Characterization of Glycerol-Plasticized Soy Protein Plastics Reinforced with Citric Acid-Modified Starch Nanoparticles. J Polym Environ 19, 582–588 (2011). https://doi.org/10.1007/s10924-011-0304-6

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  • DOI: https://doi.org/10.1007/s10924-011-0304-6

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