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Biodegradation of Polycaprolactone (PCL) with Different Molecular Weights by Candida antarctica Lipase

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Abstract

Biodegradation characteristics of polycaprolactone (PCL) films with three different molecular weights after being degraded by Candida antarctica lipase were investigated. The changes of the PCL films before and after degradation were characterized. The results showed that the degradation process of PCL films could be roughly divided into two phrases: a rapid degradation phase and a slow degradation phase. Molecular weights of PCL films had no influence on the performance of lipase; however, increasing molecular weight caused the numbers of pores on the degraded PCL films to increase, and the pores became deeper as the degradation time increased. The results also showed that the crystallinity of the films decreased with increasing degradation time, and both the crystalline and the amorphous regions of the films were simultaneously degraded. The thermal stability of the films also gradually decreased with the increase of degradation time. Despite the above changes, the degradation did not cause the chemical composition and structure of PCL to change, and PCL remained the main component.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant No. 31570097), the LiaoNing Revitalization Talents Program (Grant No. XLYC1807034), the Program for Liaoning Innovative Talents in University (Grant No. LR2017063) and the Natural Science Foundation of Liaoning Province (Grant No. 20180550589).

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

    Qingfeng Ma, Ke Shi, Tingting Su & Zhanyong Wang

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  1. Qingfeng Ma
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  2. Ke Shi
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  3. Tingting Su
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  4. Zhanyong Wang
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Correspondence to Tingting Su or Zhanyong Wang.

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Ma, Q., Shi, K., Su, T. et al. Biodegradation of Polycaprolactone (PCL) with Different Molecular Weights by Candida antarctica Lipase. J Polym Environ 28, 2947–2955 (2020). https://doi.org/10.1007/s10924-020-01826-4

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