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Significantly improved flame-retardancy of cellulose acetate nanofiber by Mg-based nano flaky petal

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Abstract

Flower-shaped hydromagnesite (MgO-P) and magnesium oxide (MgO) micro spheres were synthesized via precipitation-aging method with and without calcination. The disassociated nano flaky petal of around 50 nm (~ 20 nm in thickness) of MgO-P and MgO by sonication were used as flame-retardants for the electrospun cellulose acetate (CA)/MgO-P or CA/MgO nanofiber. SEM, XRD, FTIR, HRTEM were used to characterize all related products. TGA was used to analyze the detailed decomposition procedures of bare, MgO-P, and MgO doped CA nanofiber. Three evaluation methods including broken time after heating, thermography during heating, and combustion observation were adopted to compare the flame-retardancy of composited nanofibers. Doped CA nanofibers showed best flame-retardancy by extending the heat-induced broken time from 0.46 to 12.09 s, which is 26.3 times that of CA nanofiber. The flame of CA/MgO-P and CA/MgO could be self-extinguished once the ignition source was removed. No smoke and size shrinkage could be observed during the combustion of CA/MgO-P or CA/MgO nanofibers. Corresponding flame-retarding mechanism of Mg-based nano flaky petal was proposed.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (Grant 51773158); and the Key Laboratory of Textile Fiber&Product (Wuhan Textile University) (Grant FZXW2017013), Ministry of Education, for their financial supports.

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Author notes

  1. Lang Jiang and Ke Li have contributed equally to this work.

Authors and Affiliations

  1. State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan, 430200, People’s Republic of China

    Lang Jiang, Ke Li, Huiyu Yang, Xin Liu, Weilin Xu & Bo Deng

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  1. Lang Jiang
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  2. Ke Li
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  3. Huiyu Yang
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  4. Xin Liu
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  5. Weilin Xu
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  6. Bo Deng
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Correspondence to Weilin Xu or Bo Deng.

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Jiang, L., Li, K., Yang, H. et al. Significantly improved flame-retardancy of cellulose acetate nanofiber by Mg-based nano flaky petal. Cellulose 26, 5211–5226 (2019). https://doi.org/10.1007/s10570-019-02451-8

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  • DOI: https://doi.org/10.1007/s10570-019-02451-8

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