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The Effect of Carbodiimide on the Stability of Wood Fiber/Poly(lactic acid) Composites During Soil Degradation

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Abstract

To prolong the service lives of wood fiber (WF)/poly(lactic acid) (PLA) composites, composites with different contents of bis (2,6-diisopropylphenyl) carbodiimide (BDICDI) were prepared. The composites were buried in natural soil for 150 days to evaluate the stabilizing effect of BDICDI on the WF/PLA composites. It was also used to evaluate the properties changes of WF/PLA composites under extreme conditions. The changes in the chemical structures, molecular weights and thermal properties of the WF/PLA composites during soil burial and the stabilization mechanism of BDICDI on the composites were studied. The results showed that the addition of BDICDI reacted with both the formed acid and the water absorbed by the WF/PLA composites, which inhibited the breaking of ester bonds in the WF/PLA composites. After 120 days of soil burial, the tensile strengths of the WF/PLA/1 wt% BDICDI composites were 1.31 times to those of the WF/PLA composites. This research provided theoretical support to prolong the service lives of WF/PLA composites and expanded the application scope of WF/PLA composites.

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Acknowledgements

This work was supported by the Fundamental Research Funds for the Central Universities (No. 2572017EB06) and the National Natural Science Foundation of China (No. 31670569). Special thanks were to the support of the Chinese University Students 'Innovation and Entrepreneurship Project (CL201910).

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Authors and Affiliations

  1. Key Laboratory of Bio-Based Material Science and Technology, Ministry of Education, Northeast Forestry University, Harbin, 150040, China

    Ce Sun, Zixiang Huang, Yifan Liu, Changxin Li, Haiyan Tan & Yanhua Zhang

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  1. Ce Sun
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  2. Zixiang Huang
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  3. Yifan Liu
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  4. Changxin Li
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  5. Haiyan Tan
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  6. Yanhua Zhang
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Correspondence to Yanhua Zhang.

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Sun, C., Huang, Z., Liu, Y. et al. The Effect of Carbodiimide on the Stability of Wood Fiber/Poly(lactic acid) Composites During Soil Degradation. J Polym Environ 28, 1315–1325 (2020). https://doi.org/10.1007/s10924-020-01688-w

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  • DOI: https://doi.org/10.1007/s10924-020-01688-w

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