NDLI: Environmentally Benign Phytic Acid-Based Nanocoating for Multifunctional Flame-Retardant/Antibacterial Cotton

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Environmentally Benign Phytic Acid-Based Nanocoating for Multifunctional Flame-Retardant/Antibacterial Cotton

Content Provider	MDPI
Author	Bojana, Vončina Magovac, Eva Budimir, Ana Jordanov, Igor Grunlan, Jaime C. Bischof, Sandra
Copyright Year	2021
Description	Environmentally benign layer-by-layer (LbL) deposition was used to obtain flame-retardant and antimicrobial cotton. Cotton was coated with 8, 10, and 12 phytic acid (PA) and chitosan (CH)-urea bilayers (BL) and then immersed into copper (II) sulfate $(CuSO_{4}$) solution. Our findings were that 12 BL of PA/CH-urea + $Cu^{2+}$ were able to stop flame on cotton during vertical flammability testing (VFT) with a limiting oxygen index (LOI) value of 26%. Microscale combustion calorimeter (MCC) data showed a reduction of peak heat release rates (pHRR) of more than 61%, while the reduction of total heat release (THR) was more than 54%, relative to untreated cotton. TG-IR analysis of 12 BL-treated cotton showed the release of water, methane, carbon dioxide, carbon monoxide, and aldehydes, while by adding $Cu^{2+}$ ions, the treated cotton produces a lower amount of methane. Treated cotton also showed no levoglucosan. The intumescent behavior of the treatment was indicated by the bubbled structure of the post-burn char. Antibacterial testing showed a 100% reduction of Klebsiella pneumoniae and Staphylococcus aureus. In this study, cotton was successfully functionalized with a multifunctional ecologically benign flame-retardant and antibacterial nanocoating, by means of LbL deposition.
Starting Page	69
e-ISSN	20796439
DOI	10.3390/fib9110069
Journal	Fibers
Issue Number	11
Volume Number	9
Language	English
Publisher	MDPI
Publisher Date	2021-10-31
Access Restriction	Open
Subject Keyword	Fibers Cotton Antimicrobial Flame-retardancy Chitosan Phytic Acid Copper (ii) Sulfate
Content Type	Text
Resource Type	Article

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