Oriented clay nanopaper from biobased components--mechanisms for superior fire protection properties

ACS Applied Materials & Interfaces
Federico CarosioLars A Berglund

Abstract

The toxicity of the most efficient fire retardant additives is a major problem for polymeric materials. Cellulose nanofiber (CNF)/clay nanocomposites, with unique brick-and-mortar structure and prepared by simple filtration, are characterized from the morphological point of view by scanning electron microscopy and X-ray diffraction. These nanocomposites have superior fire protection properties to other clay nanocomposites and fiber composites. The corresponding mechanisms are evaluated in terms of flammability (reaction to a flame) and cone calorimetry (exposure to heat flux). These two tests provide a wide spectrum characterization of fire protection properties in CNF/montmorrilonite (MTM) materials. The morphology of the collected residues after flammability testing is investigated. In addition, thermal and thermo-oxidative stability are evaluated by thermogravimetric analyses performed in inert (nitrogen) and oxidative (air) atmospheres. Physical and chemical mechanisms are identified and related to the unique nanostructure and its low thermal conductivity, high gas barrier properties and CNF/MTM interactions for char formation.

References

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Citations

Jun 3, 2017·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Ayman M AttaMohamed Wahby
Feb 23, 2018·Angewandte Chemie·Zhi-Long YuShu-Hong Yu
Mar 6, 2018·Advanced Materials·Eero KontturiOlli Ikkala
Nov 2, 2017·Beilstein Journal of Nanotechnology·Alfredo J DiazSantiago D Solares
Sep 10, 2020·Advanced Materials·Xianpeng YangHiroyuki Yano
Oct 11, 2017·Nanoscale·Ahmed BarhoumAlain Dufresne
Aug 9, 2019·Advances in Colloid and Interface Science·L AlvesJ A F Gamelas
Jan 10, 2019·ACS Applied Materials & Interfaces·Huizhang GuoIngo Burgert
Aug 22, 2017·ACS Applied Materials & Interfaces·Qiliang FuLars A Berglund
Jan 8, 2019·Biomacromolecules·Felix RiehleAndreas Walther
Aug 5, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Siyi MingZhiqiang Fang
Jul 24, 2018·ACS Applied Materials & Interfaces·Muhammad FarooqMonika Österberg

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