TY  - JOUR
PY  - 2020//
TI  - Mica-based multilayer nanocoating as highly-effective flame retardant and smoke suppressant
JO  - ACS applied materials and interfaces
A1  - Fahami, Abbas
A1  - Lee, Jungyu
A1  - Lazar, Simone
A1  - Grunlan, Jaime C.
SP  - ePub
EP  - ePub
VL  - ePub
IS  - ePub
N2  - Highly flammable polyurethane foam (PUF) remains a key risk factor associated with bedding and upholstered furniture, contributing to the yearly destruction of property and loss of lives. In an attempt to tackle this issue and develop a more benign flame retardant (FR) for PUF, a mica-based nanocomposite was deposited using layer-by-layer assembly. Chitosan (CH) and poly(acrylic acid) (PAA) were used to stabilize high aspect ratio mica. Foam treated with eight bilayers (BL) of CH and PAA-stabilized mica preserves the porous foam structure, prevents melt dripping, and self-extinguishes during a 10 s torch test, while uncoated foam is completely consumed. When exposed to a 35 kW/m2 heat flux during cone calorimetry, the peak heat release rate is reduced by 54% and less volatile molecules are released during combustion, resulting in a 76% reduction in total smoke release. This multilayer coating serves as an environmentally benign template for flame retarding polyurethane foam and various other three-dimensional substrates.<p />  <p>Language: en</p>
LA  - en
SN  - 1944-8244
UR  - http://dx.doi.org/10.1021/acsami.0c02397
ID  - ref1
ER  -