Barrier Effects of Cellulosic Fibers with Hybrid Coating Based on Zirconium Metal-Organic Framework

Qiuyue Wu; Manuel Jose Lis

doi:10.3390/polym14153071

Barrier Effects of Cellulosic Fibers with Hybrid Coating Based on Zirconium Metal-Organic Framework

Polymers (Basel). 2022 Jul 29;14(15):3071. doi: 10.3390/polym14153071.

Authors

Qiuyue Wu¹, Manuel Jose Lis²

Affiliations

¹ The Institute of Textile Research and Industrial Cooperation of Terrassa, Polytechnic University of Catalonia, 08222 Barcelona, Spain.
² Department of Chemical Engineering, Polytechnic University of Catalonia, 08222 Barcelona, Spain.

Abstract

Metal-organic frameworks (MOFs) have great potential for the development of fire barriers for flammable materials. Accordingly, zirconium-based metal-organic framework (Zr-MOF), branched polyethyleneimine (BPEI), and vinyltriethoxysilane (VTES) were deposited to produce composites assembled on cellulosic fibers to investigate their barrier effects. The structure, morphology, and thermal properties of the cellulosic fibers were characterized using FTIR spectroscopy, SEM, and TGA. Compared with the untreated cotton sample, the temperature of the maximum rate of weight loss (T_max) of C-Zr-MOF/BPEI/VTES increased from 479 to 523.3 °C and the maximum weight loss rate (R_max) at T_max decreased from 37.6 to 17.2 wt%/min. At 800 °C, the pristine cotton was burned out without residues whereas the residual char content of the C-Zr-MOF/BPEI/VTES sample was 7.2355 wt%. From the vertical burning tests, the results suggested that the C-Zr-MOF/BPEI/VTES sample had better barrier effects by reducing the flame-spread speed and generating more protective char layers.

Keywords: cellulosic fibers; fire barriers; metal-organic frameworks; polyethyleneimine; vinyltriethoxysilane.

Grants and funding

This research received no external funding.