Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2017, Vol. 28 ›› Issue (11): 156 doi: 10.1007/s41365-017-0312-x


Radiation grafting of poly(vinyl acetate) onto wheat straw and properties of the product

Ping Qu 1  Guo-Feng Wu Jing-Xia Wu Yong-Fu Zhao 1   

  1. 1 Institute of Agricultural Facilities and Equipment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
    2 Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Science, Nanjing 210014, China
  • Contact: Yong-Fu Zhao
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (No. 11605077) and the Free Exploration Project for Youth Research of Jiangsu Academy of Agricultural Sciences (No. ZX(15)4012).

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Ping Qu, Guo-Feng Wu, Jing-Xia Wu, Yong-Fu Zhao. Radiation grafting of poly(vinyl acetate) onto wheat straw and properties of the product.Nuclear Science and Techniques, 2017, 28(11): 156     doi: 10.1007/s41365-017-0312-x


Poly(vinyl acetate) (PVAc) was grafted onto wheat straw by γ-irradiation to improve the compatibility between wheat straw and high-density polyethelene (PE). The grafting was proved by Fourier transform infrared (FTIR) spectroscopy. The compact structure of wheat straw was loosened because the chemical bonds and crystalline structure were destructed by the γ-rays. The modified wheat straw needed less energy for thermal transition, as revealed by differential scanning calorimetry (DSC). Thermal analysis revealed that grafted PVAc acted as a protective barrier for the wheat straw and leads to an increase in maximum pyrolysis temperature. The crystallite size of grafted wheat straw decreased to 5.33 nm from 5.63 nm before irradiation. There were holes in melted form appeared on the surface of the grafted wheat straws. Both the grafted PVAc and irradiation are beneficial to lower the torque of wheat straw/PE melts and improve its mechanical properties by 36%. Possible mechanism of irradiation grafting was proposed.

Key words: Wheat straw, Poly(vinyl acetate), Radiation grafting, Composites