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Preparation and characterization of flame‐retardant lamellar Mg(OH) 2 thin films on citric acid‐treated cotton fabrics
Author(s) -
Mao Qinghui,
Zhang Linping,
Huang Dehui,
Wang Dan,
Huang Yang,
Xu Hong,
Cao Huantian,
Mao Zhiping
Publication year - 2011
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.3652
Subject(s) - citric acid , adsorption , materials science , fire retardant , lamellar structure , langmuir adsorption model , monolayer , nuclear chemistry , hydroxide , chemical engineering , polymer chemistry , composite material , chemistry , inorganic chemistry , organic chemistry , nanotechnology , engineering
Preparation and characterization of lamellar magnesium hydroxide (Mg(OH) 2 ) thin films on cotton fabrics are reported in this paper. Mercerized cotton fabrics were treated with citric acid, so carboxyl groups were introduced to the surface of the fabrics. Mg(OH) 2 seeds were first adsorbed on the citric acid‐treated cotton fabrics and then Mg(OH) 2 thin films grew on the fabric through secondary growth method. Kinetics and isotherm studies found that the adsorption of Mg(OH) 2 seeds on citric acid‐treated cotton fabrics followed pseudo second‐order kinetic model and Langmuir isotherm. This indicated that Mg(OH) 2 seeds adsorption was monolayer chemical adsorption driven by electric attraction between positively charged Mg(OH) 2 seeds and COO − ions on the cotton fiber surface. The X‐ray diffraction (XRD) and SEM characterizations of the Mg(OH) 2 thin films covered cotton fabrics found that standing flaky Mg(OH) 2 crystals formed a shell of porous but continuous network on cotton fabric surface. Owing to the Mg(OH) 2 thin film covering, the fabric had fireproof property, lower thermal conductivity and higher optical absorbance in the UV, Vis and IR regions. Copyright © 2010 John Wiley & Sons, Ltd.