Environmentally Benign Phytic Acid-Based Nanocoating for Multifunctional Flame-Retardant/Antibacterial Cotton
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<sub>4</sub>) solution. Our findi...
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MDPI AG
2021-10-01
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| Online Access: | https://www.mdpi.com/2079-6439/9/11/69 |
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| author | Eva Magovac Bojana Vončina Ana Budimir Igor Jordanov Jaime C. Grunlan Sandra Bischof |
| author_facet | Eva Magovac Bojana Vončina Ana Budimir Igor Jordanov Jaime C. Grunlan Sandra Bischof |
| author_sort | Eva Magovac |
| collection | DOAJ |
| 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<sub>4</sub>) solution. Our findings were that 12 BL of PA/CH-urea + Cu<sup>2+</sup> 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<sup>2+</sup> 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 <i>Klebsiella pneumoniae</i> and <i>Staphylococcus aureus</i>. In this study, cotton was successfully functionalized with a multifunctional ecologically benign flame-retardant and antibacterial nanocoating, by means of LbL deposition. |
| first_indexed | 2024-03-10T05:31:05Z |
| format | Article |
| id | doaj.art-fcfe2bac96fa407ca2f7bb442ca1f23d |
| institution | Directory Open Access Journal |
| issn | 2079-6439 |
| language | English |
| last_indexed | 2024-03-10T05:31:05Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fibers |
| spelling | doaj.art-fcfe2bac96fa407ca2f7bb442ca1f23d2023-11-22T23:17:05ZengMDPI AGFibers2079-64392021-10-019116910.3390/fib9110069Environmentally Benign Phytic Acid-Based Nanocoating for Multifunctional Flame-Retardant/Antibacterial CottonEva Magovac0Bojana Vončina1Ana Budimir2Igor Jordanov3Jaime C. Grunlan4Sandra Bischof5Department of Textile Chemistry and Ecology, University of Zagreb Faculty of Textile Technology, Prilaz baruna Filipovica 28a, 10000 Zagreb, CroatiaLaboratory for Chemistry and Environmental Protection, Faculty of Mechanical Engineering, University of Maribor, Smetanova 1, 2609 Maribor, SloveniaDepartment for Typing and Monitoring the Causes of Nosocomial Infections, University Hospital Centre Zagreb, Kispaticeva 12, 10000 Zagreb, CroatiaDepartment of Textiles, Faculty of Technology and Metallurgy, University Ss. Cyril and Methodius, Ruger Boskovic 16, 1000 Skopje, North MacedoniaDepartment of Mechanical Engineering, Texas A&M University, 3123 TAMU, College Station, TX 77843, USADepartment of Textile Chemistry and Ecology, University of Zagreb Faculty of Textile Technology, Prilaz baruna Filipovica 28a, 10000 Zagreb, CroatiaEnvironmentally 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<sub>4</sub>) solution. Our findings were that 12 BL of PA/CH-urea + Cu<sup>2+</sup> 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<sup>2+</sup> 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 <i>Klebsiella pneumoniae</i> and <i>Staphylococcus aureus</i>. In this study, cotton was successfully functionalized with a multifunctional ecologically benign flame-retardant and antibacterial nanocoating, by means of LbL deposition.https://www.mdpi.com/2079-6439/9/11/69cottonantimicrobialflame-retardancychitosanphytic acidcopper (II) sulfate |
| spellingShingle | Eva Magovac Bojana Vončina Ana Budimir Igor Jordanov Jaime C. Grunlan Sandra Bischof Environmentally Benign Phytic Acid-Based Nanocoating for Multifunctional Flame-Retardant/Antibacterial Cotton Fibers cotton antimicrobial flame-retardancy chitosan phytic acid copper (II) sulfate |
| title | Environmentally Benign Phytic Acid-Based Nanocoating for Multifunctional Flame-Retardant/Antibacterial Cotton |
| title_full | Environmentally Benign Phytic Acid-Based Nanocoating for Multifunctional Flame-Retardant/Antibacterial Cotton |
| title_fullStr | Environmentally Benign Phytic Acid-Based Nanocoating for Multifunctional Flame-Retardant/Antibacterial Cotton |
| title_full_unstemmed | Environmentally Benign Phytic Acid-Based Nanocoating for Multifunctional Flame-Retardant/Antibacterial Cotton |
| title_short | Environmentally Benign Phytic Acid-Based Nanocoating for Multifunctional Flame-Retardant/Antibacterial Cotton |
| title_sort | environmentally benign phytic acid based nanocoating for multifunctional flame retardant antibacterial cotton |
| topic | cotton antimicrobial flame-retardancy chitosan phytic acid copper (II) sulfate |
| url | https://www.mdpi.com/2079-6439/9/11/69 |
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