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Preparation and characterization of silk sericin/glycerol/graphene oxide nanocomposite film

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Abstract

Sericin (SS) is a protein that is secreted by silkworms, but it is usually discarded during the degumming process. To obtain and make use of the sericin, we prepared sericin/glycerol/graphene oxide nanocomposite film. The inherent brittleness of pure sericin film was improved by the addition of glycerol (Glc) as a plasticizer. To compensate for the reduced stiffness, we added graphene oxide (GO) into the SS/Glc film. At concentrations of up to 0.8 wt% relative to SS, GO dispersed evenly in the SS matrix without any agglomeration. The maximum tensile strength (9.5±0.7 MPa) and Young’s modulus (414.4±23.2 MPa) were obtained when the GO content was 0.8 wt% relative to SS. The elongation of SS/Glc/GO nanocomposite film also increased by approximately 40 % compared to SS/Glc film. The strong interfacial interaction between the SS and the GO was responsible for the increased stiffness. The increased elongation was due to the reduced crystallinity of the sericin matrix in the presence of GO.

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Authors and Affiliations

  1. Department of Biosystems & Biomaterials Science and Engineering, Seoul National University, Seoul, 151-921, Korea

    Haesung Yun, Moo Kon Kim, Hyo Won Kwak, Jeong Yun Lee, Min Hwa Kim & Ki Hoon Lee

  2. Korea Institute for Knit Industry, Iksan, 573-330, Korea

    Eui Hwa Kim

  3. Center for Food and Bioconvergence, Seoul National University, Seoul, 151-921, Korea

    Ki Hoon Lee

  4. Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul, 151-921, Korea

    Ki Hoon Lee

Authors
  1. Haesung Yun
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  2. Moo Kon Kim
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  3. Hyo Won Kwak
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  4. Jeong Yun Lee
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  5. Min Hwa Kim
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  6. Eui Hwa Kim
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  7. Ki Hoon Lee
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Correspondence to Ki Hoon Lee.

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Yun, H., Kim, M.K., Kwak, H.W. et al. Preparation and characterization of silk sericin/glycerol/graphene oxide nanocomposite film. Fibers Polym 14, 2111–2116 (2013). https://doi.org/10.1007/s12221-013-2111-2

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  • DOI: https://doi.org/10.1007/s12221-013-2111-2

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