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Synthesis and Characterization of Epoxidized Silkworm Pupae Oil and Its Application as Polyvinyl Chloride

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Abstract

More and more industries demand environmental friendliness. Silkworm pupae oil (SPO), extracted from the desilked silkworm pupae, can serve as a promising substrate alternative to use in plasticization. This study aimed to prepare epoxidized silkworm pupae oil (ESPO) and investigate their effects on the thermal stability and plasticization of polyvinyl chloride (PVC) films. A chemo-enzymatic method of ESPO was developed in the presence of Lipase SMG1-F278N and H2O2 in natural deep eutectic solvents (DESs). Lipase SMG1-F278N could initiate the epoxidation reaction effectively at room temperature with a negligible loss of activities 10 batches. A maximum oxirane value of 6.94% was obtained. The formation of oxirane ring in ESPO was confirmed by FTIR and 13C NMR spectra. Moreover, ESPO showed a better thermal stability and lower freezing point than epoxidized soybean oil (ESO). It was demonstrated that ESPO had a good frost resistance. In addition, ESPO showed a significantly improved plasticizing effect on flexible polyvinyl chloride (PVC). Compared with ESO, ESPO could increase the tensile elongation at break effectively. A significantly lower migration rate of plasticizer was observed in PVC plasticized with ESPO.

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Funding

The authors acknowledge funding from the National Key R&D Program of China (2019YFD1002403), National Science Fund for Key Program of National Natural Science Foundation of China (31930084), Distinguished Young Scholars of China (31725022), China Agriculture Research System (CARS-18-ZJ0503), Science and Technology Planning Project of Guangdong Province (2019A050503002), and Innovation and Entrepreneurship Team of Nanhai Talent Plan of Nanhai District, Foshan (201811070001).

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Authors and Affiliations

  1. School of Food Science and Engineering, South China University of Technology, Guangzhou, 510640, China

    Yingrui Ji, Qingqing Xu, Xuan Liu, Sen Lin & Dongming Lan

  2. School of Food Science and Technology, Henan Agricultural University, Zhengzhou, 450002, China

    Long Xu

  3. Sericultural and Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510610, China

    Sentai Liao & Weifei Wang

Authors
  1. Yingrui Ji
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  2. Long Xu
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  3. Qingqing Xu
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  4. Xuan Liu
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  5. Sen Lin
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  6. Sentai Liao
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  7. Weifei Wang
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  8. Dongming Lan
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Contributions

Yingrui Ji: Experimental activities, conceptualization, data curation, supervision, formal analysis, validation, writing—original draft.

Long Xu: Methodology, writing—review and editing.

Qingqing Xu: Investigation.

Xuan Liu: Supervision.

Sen Lin: Formal analysis.

Sentai Liao: Experimental activities.

Weifei Wang: Resources.

Dongming Lan: Funding acquisition.

Corresponding authors

Correspondence to Weifei Wang or Dongming Lan.

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Ji, Y., Xu, L., Xu, Q. et al. Synthesis and Characterization of Epoxidized Silkworm Pupae Oil and Its Application as Polyvinyl Chloride. Appl Biochem Biotechnol 194, 1290–1302 (2022). https://doi.org/10.1007/s12010-021-03715-5

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  • DOI: https://doi.org/10.1007/s12010-021-03715-5

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