Three sources-in-one bio-MOFs doped silicone acrylic emulsion-based waterborne flame-retarding coatings with formaldehyde adsorption property

作者：Wang, YaChao^*; Kou, Xiaofei; Zhao, JiangPing; Xin, A.

来源：PROGRESS IN ORGANIC COATINGS, 2023, 175: 107329.

DOI：10.1016/j.porgcoat.2022.107329

• Metal-organic framework
• Cyclodextrin
• Flame retardants
• Formaldehyde
• Pyrolysis kinetics

Novel three sources-in-one bio-MOFs doped silicone acrylic emulsion-based waterborne coatings are prepared, using the as-prepared gamma-cyclodextrin-based bio-metal-organic framework materials (CD-MOF) as the flame-retarding filler, which has a BET surface area of 451 cm(2).g(-1). The flame retardant and formaldehyde adsorption performance are investigated by various microstructural characterizations. Additionally, pyrolysis and adsorption kinetics are employed to probe the flame-retarding and adsorption mechanisms. The results show that the synergistic flame-retarding effect of ammonium polyphosphate (APP) with CD-MOFs is superior to that of 9,10-dihydro-9-oxa-10-phosphaphenanthr-ene-10-oxide (DOPO) blended CD-MOF, evidenced by the FGI decreasing from 1.91 to 1.47 kW.m(-2).s(-1), FPI climbing from 0.19 to 0.34 s.m(2).kW(-1), and FRI rising from 1.61 to 3.56, respectively. Because of the as-formed vitreous superphosphates, the pyrolysis activation energy E-alpha climbs from 88.8 k.Jmol(-1) to 239.4 k.Jmol(-1) at 330-450 degrees C according to the 3D Jander model (n = 2). In addition, the adsorption kinetics show that the monolayer adsorption model dominates the composite coating with a formaldehyde absorption capacity of 63.57 % within the first 24 h. The results propose a novel and ecological strategy to optimize the compatibility of organic-inorganic hybrid fireproof coatings, exploring ecological and cleaner technologies for the development of a low-carbon economy.