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Publication Citation: DNA-based Nanocomposite Bio-Coatings for Fire Retarding Polyurethane Foam

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Author(s): Yu-Chin Li; Yeon Seok Kim; John R. Shields; Rick D. Davis;
Title: DNA-based Nanocomposite Bio-Coatings for Fire Retarding Polyurethane Foam
Published: May 02, 2014
Abstract: Layer-by-Layer (LbL) assembled multilayer thin films of deoxyribonucleic acid (DNA), chitosan (CHI), and montmorillonite (MMT), were studied in an effort to produce fully renewable, bio-based fire retardant coatings for flexible polyurethane foam. The PUF bio-coatings constructed of 10 bilayers of CHI/DNA+MMT (16.2 % mass), 10 trilayers of CHI/MMT/DNA (8.1 % mass), and 5 quadlayers of CHI/DNA/CHI/MMT (4.9 % mass) all resulted in a significant reduction in critical flammability metrics, peak heat release rate (pHRR) and average HRR (aHRR). The mix bilayer, CHI/DNA+MMT, is the best formulation as it resulted in the greatest flammability reduction (51% pHRR and 81% aHRR) with the fastest bio-coating growth and the least amount of preparation and waste. This DNA and MMT- based bio-coating is the greatest flammability reduction of PUF reported to date using the LbL process. Constructed of bio-based and non-toxic materials combined with the fast growing BL approach, which has minimal waste, this is presumably the most environmental and bio-friendly fire retardant LbL coating reported.
Citation: Green Materials
Pages: 9 pp.
Keywords: DNA; renewable materials; Layer-by-Layer assembly; polyurethane foam; flame retardant; cone calorimetry; furniture
Research Areas: Polymers, Polymers/Polymeric Composites, Fire Materials Research, Fire Retardant Polymers, Nanocomposites, Nanomaterials, Nanomaterials, Biomaterials, Nanocomposite Materials
DOI: http://dx.doi.org/10.1680/gmat.14.00003  (Note: May link to a non-U.S. Government webpage)
PDF version: PDF Document Click here to retrieve PDF version of paper (3MB)