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Blending Modification of PHBV/PCL and its Biodegradation by Pseudomonas mendocina

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Abstract

Poly(3-hydroxybutyrate-co-hydroxyvalerate) (PHBV) is a biodegradable polymer synthesized in microorganisms. The application of PHBV is limited by certain material disadvantages. Poly(ε-caprolactone) (PCL) possesses excellent thermodynamic and mechanical properties and was used to modify PHBV in the presence of triethyl citrate (TEC) and dicumyl peroxide (DCP), which was used as plasticizer and grafting agent, respectively. The effects of PCL and additive agents on the mechanical, thermal, amphipathic and degradability behaviors of the blends were investigated. The results showed that the mechanical properties of the PHBV blends improved by PCL incorporation and improved even further after TEC and DCP addition. The addition of DCP could not induce an increase in crystallization temperature but improved the crystallization degree of the blends. The presence of hydrophilic groups in TEC leads to an apparent increases in the hydrophilicity of the PHBV blends. A PHBV/PCL blend (40/60) with TEC (20 wt.%) and DCP (0.5 wt.%) was chosen for its good mechanical properties and hydrophilicity. The chosen ratio of the blends was also shown a preferable degradation activity by biodegradation assay using Pseudomonas mendocina. The addition of TEC and DCP has no conspicuous negative effect on the biodegradation.

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Acknowledgments

This work was supported by National Natural Science Foundation of China (Grant No. 31100099 and 31570097) and Program for Liaoning Excellent Talents in University (Grant No. LJQ2014040).

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Authors and Affiliations

  1. College of Chemistry, Chemical Engineering and Environmental Engineering, Liaoning Shihua University, Fushun, 113001, China

    Huifang Liu, Zhaoying Gao, Xueyan Hu, Zhanyong Wang, Tingting Su, Lei Yang & Song Yan

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  1. Huifang Liu
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  2. Zhaoying Gao
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  3. Xueyan Hu
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  4. Zhanyong Wang
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  5. Tingting Su
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  7. Song Yan
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Correspondence to Zhanyong Wang.

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Liu, H., Gao, Z., Hu, X. et al. Blending Modification of PHBV/PCL and its Biodegradation by Pseudomonas mendocina . J Polym Environ 25, 156–164 (2017). https://doi.org/10.1007/s10924-016-0795-2

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  • DOI: https://doi.org/10.1007/s10924-016-0795-2

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