Facile Strategy to Design a Cellulose Nanocrystal-Based Nanocomposite Fire Retardant with Strong Smoke Suppression Efficiency

Abstract

Fire accidents can trigger severe personal injury and large-scale property damage. Therefore, the use of flame retardant is essential. A novel green ternary nanocomposite intumescent flame retardant (IFR) (CNC@MEL-PA) was fabricated by successively modifying the gas source melamine (MEL) and acid source phytic acid (PA) on the carbon source cellulose nanocrystals (CNCs). CNC@MEL-PA exhibited better thermal stability, carbon layer formation ability, and smoke suppression efficiency due to its characteristic two-dimensional (2D) petal structure and intumescent carbon layer. Notably, compared to CNCs, the expanded carbon layer volume of CNC@MEL-PA was enhanced from about 62.2 to 169.6 mm3. Therefore, this study provides a facile synthetic route of high-performance CNC@MEL-PA with good smoke suppression efficiency for a green flame-retardant material for construction and transportation products.

Nb2CTx MXene/Delignified Wood–Supported Phase-Change Composites with Desirable Photothermal Conversion Efficiency and Enhanced Flame Retardancy for Solar–Thermal Energy Storage

“…These reductions can be attributed to the susceptibility of the DW-based structures to forming a phosphorus-containing carbonaceous layer during combustion under the action of PA. Moreover, the thermal decomposition of MEL released inert gases that caused coke to develop an expanded carbon layer, thus isolating the combustible substances in the product from contacting the surrounding atmosphere …”