4.7 Article

Thermal and flame-retardant properties of multilayered composites prepared through novel multilayering approach

期刊

ENVIRONMENTAL RESEARCH
卷 213, 期 -, 页码 -

出版社

ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.envres.2022.113724

关键词

Flame retardant; Multilayer; Thermal stability; Thermal conductivity; Composites

资金

  1. National Natural Science Foundation of China [31901372]
  2. Natural Science Foundation of Jiangsu Province [BK20190758, BK20200775]
  3. China Postdoctoral Science Foundation [2019M661851]
  4. Nan Taihu Lake Elite Plan Project (Huzhou, Zhejiang Province) [2]
  5. State Administration of Foreign Experts Affairs High-End Foreign Experts Project [G2021014041L]

向作者/读者索取更多资源

This study focused on designing a new multilayering approach to fabricate flame retardant multilayered materials. The multilayered composites showed enhanced flame-retardant properties compared to conventional composites and demonstrated potential for various applications such as food and medical packaging.
Thermal and flame-retardant properties of traditional composites have limitations that are not satisfied for the various applications. Multilayered materials have great potential to improve material properties. The present paper focused on designing new multilayering approach to fabricate flame retardant multilayered materials with a very basic instrument and several simple steps. Montmorillonite nanoparticles filled maleic anhydride grafted polypropylene composites were prepared by the melt-blending method, and the multilayered composites with polypropylene alternating multilayers were fabricated by the quadruple-layering approach. The multilayer structure was characterized by the scanning electron microscopy/energy dispersive spectrometer. The influence of layer structure on the thermal stability, thermal conductivity and flame-retardant properties was investigated by the comparison with the conventional composites. Multilayered composites showed enhanced flame-retardant properties with lower peak heat release rate and better char formation compared to conventional composites with the same mass fraction of montmorillonite. Multilayered composites had higher mass fraction of montmorillonite in filled layers and no fillers in other layers, which caused the unequal distribution of montmorillonite, resulting in changes of thermal and flame-retardant properties of the materials especially in the perpendicular direction to the film surface. This study demonstrates a unique multilayering approach that has potential to be used in variety applications such as food and medical packaging.

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