LBL generated fire retardant nanocomposites on cotton fabric using cationized starch-clay-nanoparticles matrix

Zeeshan Ur Rehman; Seok-Hwan Huh; Zakir Ullah; Ye-Tang Pan; David G Churchill; Bon Heun Koo

doi:10.1016/j.carbpol.2021.118626

LBL generated fire retardant nanocomposites on cotton fabric using cationized starch-clay-nanoparticles matrix

Carbohydr Polym. 2021 Nov 15:274:118626. doi: 10.1016/j.carbpol.2021.118626. Epub 2021 Sep 1.

Authors

Zeeshan Ur Rehman¹, Seok-Hwan Huh¹, Zakir Ullah², Ye-Tang Pan³, David G Churchill⁴, Bon Heun Koo⁵

Affiliations

¹ College of Mechatronic Engineering, Changwon National University, Changwon, Gyeongsangnam-do 51140, Republic of Korea.
² Department of Chemistry, Molecular Logic Gate Laboratory, Korea Advanced Institute of Science and Technology (KAIST), Republic of Korea.
³ National Engineering Technology Research Center of Flame Retardant Materials, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, PR China.
⁴ Department of Chemistry, Molecular Logic Gate Laboratory, Korea Advanced Institute of Science and Technology (KAIST), Republic of Korea. Electronic address: david.churchill.korea@gmail.com.
⁵ College of Mechatronic Engineering, Changwon National University, Changwon, Gyeongsangnam-do 51140, Republic of Korea. Electronic address: bhkoo@changwon.ac.kr.

PMID: 34702452
DOI: 10.1016/j.carbpol.2021.118626

Abstract

In this work, starch-clay-TiO₂-based nanocomposites were deposited on cotton fabric through layer-by-layer (LBL) process and their effect on the flame retardancy, inhibition of pyrolysis and combustion processes were discussed in details. Polyelectrolyte solutions/suspensions of cationized starch and VMT (vermiculite)/TiO₂ nanoparticles were used to deposit these nanocomposites in the form of multi-layered coatings (5, 7, 10 and 15 bilayers). Uniform fabric coverage and presence of electrolytes was imaged by scanning electron microcopy (LV-SEM), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) and EDX characterizations. The greatest pyrolysis reduction was found for the StVT-7 sample (7 bilayers); ~30% and 21%, based on microscale combustion calorimetry (MCC) and thermogravimetric analysis (TGA). When using MCC, the improved values of the PHRR ~ 193 W/g, THR ~ 10.7 kJ/g), HRC ~ 390 J/g∙K and LOI ~ 22.2% were found for the StVT-7 sample which was strongly supported by the UL-94 test.

Keywords: Ammonium centers; Cotton; Fire retardant; Ionization; Nanoparticle; Pyrolysis TiO(2); Vermiculite.