Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 126, Issue -, Pages 436-442Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ijbiomac.2018.12.168
Keywords
Poly(butylene succinate); Poly(lactic acid); Selective enzymatic degradation
Funding
- National Natural Science Foundation of China [31570097]
- Science Project of Liaoning Province Education Office [L2016002]
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Poly(butylene succinate) (PBS) and poly(lactic acid) (PLA) were melt-blended in different proportions and selectively degraded by cutinase and proteinase K, respectively. The selective enzymatic degradation process was systematically investigated. The degraded PBS/PLA blends were analyzed via scanning electron microscopy, Fourier transform infrared spectroscopy, powder X-ray diffraction, and differential scanning calorimetry. The results of the weight loss of PBS/PLA blends degraded by cutinase and proteinase K suggested that PLA hindered the cutinase-catalyzed degradation of PBS, whereas the addition of PBS in the blends accelerated the degradation of PLA within a specific PBS/PLA ratio. The change in crystallinity after degradation was closely related to the different way of degradation. The characterization of PBS/PLA blends after degradation showed that selective enzymatic degradation could not completely degrade PBS or PLA component. After degradation, the pores formed by proteinase K were more uniform and larger than those formed by cutinase. This work provides a new insight into the selective enzymatic degradation processes of the porous materials, which will be used in tissue engineering or oil-water separation in the future. (C) 2018 Elsevier B.V. All rights reserved.
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