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Poly(Lactic Acid) Blended with Cellulolytic Enzyme Lignin: Mechanical and Thermal Properties and Morphology Evaluation

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Abstract

“Green”/bio-based blends of poly(lactic acid) (PLA) and cellulolytic enzyme lignin (CEL) were prepared by twin-screw extrusion blending. The mechanical and thermal properties and the morphology of the blends were investigated. It was found that the Young’s modulus of the PLA/CEL blends is significantly higher than that of the neat PLA and the Shore hardness is also somewhat improved. However, the tensile strength, the elongation at break, and the impact strength are slightly decreased. Thermogravimetric analysis (TGA) shows that the thermal stability of the PLA is not significantly affected by the incorporation of the CEL, even with 40 wt% CEL. The results of FT-IR and SEM reveal that the CEL and the PLA are miscible and there are efficient interactions at the interfaces between them. These findings show that the CEL is a kind of feasible filler for the PLA-based blends.

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Acknowledgments

The financial support of National Natural Science Foundation of China (Grant No. 50821062) was greatly appreciated. The authors would like to thank Prof. Yong Qiang in Nanjing University of Forest for his gift of the CEL sample, Prof. Mingcai Chen in Guangzhou Institute of Chemistry, CAS for the assistance in blending processing, and Dr. Linli Xu for her helpful discussion.

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Authors and Affiliations

  1. Laboratory of Cellulose and Lignocellulosics Chemistry, Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, 510650, China

    Wenzhu Ouyang, Yong Huang, Hongjun Luo & Dongshan Wang

  2. National Engineering Research Center for Engineering Plastics, Technical Institute of Physics & Chemistry, Chinese Academy of Sciences, Beijing, 100190, China

    Yong Huang

  3. Graduate University of Chinese Academy of Sciences, Beijing, 100039, China

    Wenzhu Ouyang & Hongjun Luo

Authors
  1. Wenzhu Ouyang
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  2. Yong Huang
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  3. Hongjun Luo
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  4. Dongshan Wang
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Correspondence to Yong Huang.

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Ouyang, W., Huang, Y., Luo, H. et al. Poly(Lactic Acid) Blended with Cellulolytic Enzyme Lignin: Mechanical and Thermal Properties and Morphology Evaluation. J Polym Environ 20, 1–9 (2012). https://doi.org/10.1007/s10924-011-0359-4

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  • DOI: https://doi.org/10.1007/s10924-011-0359-4

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