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Preparation of carbon nanotubes/polylactic acid nanocomposites using a non-covalent method

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Abstract

The polymeric composites with four-armed star polylactic acid (PLA) immobilized on the surface of carbon nanotubes (CNTs) were constructed by a simple ultrasonic process using non-covalent method. The four-armed star polylactic acid was prepared by ring-opening polymerization of lactide using zinc p-tetraaminophenylporphyrin (ZnP) as initiator and stannous octoate as catalyst. Due to the strong π–π interactions between CNTs and zinc porphyrin of star PLA, the CNTs/PLA composites can be easily obtained while the intrinsic graphitic structure of CNTs is retained. The CNTs/PLA nanocomposite was studied via infrared spectrum (IR) and thermogravimetric (TG) analysis. UV–Vis and fluorescence demonstrate that the porphyrin probably strongly anchored on the side walls of the nanotubes. Optical studies further promise the non-covalent interactions. Meanwhile, morphology studies with and scanning electron microscope (SEM) show that CNTs are dispersed well in the polymer. This convenient non-covalent method may be useful for the preparation of CNTs–polymer hybrid without the destruction of the intrinsic graphitic structure of the pristine CNTs.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (21404066) and Qingdao Agricultural University Research Foundation (631222).

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Authors and Affiliations

  1. College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, 266109, People’s Republic of China

    Jianzhong Li, Zuwei Song & Libin Gao

  2. College of Animal Science and Technology, Qingdao Agricultural University, Qingdao, 266109, People’s Republic of China

    Hu Shan

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  1. Jianzhong Li
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  2. Zuwei Song
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  3. Libin Gao
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  4. Hu Shan
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Correspondence to Jianzhong Li or Hu Shan.

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Li, J., Song, Z., Gao, L. et al. Preparation of carbon nanotubes/polylactic acid nanocomposites using a non-covalent method. Polym. Bull. 73, 2121–2128 (2016). https://doi.org/10.1007/s00289-015-1597-8

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  • DOI: https://doi.org/10.1007/s00289-015-1597-8

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