International.
Researchers at Kashan University, Iran, succeeded in producing fire-resistant coatings by synthesizing a type of magnetic nanoparticle and using it in a nanocomposite structure.
This research introduces an effective and non-toxic substitution for habiatual fireproof materials, such as carcinogenic aromatic compounds containing halogens such as polyvinyl-filled alcohol. Polyvinyl alcohol is a polymer commonly used with many applications in various industries. Relatively low heat resistance and high flammability are the main disadvantages of this polymer.
The usual filler materials weaken the mechanical properties of polyvinyl alcohol due to inappropriate dispersion and the creation of the two-phase structure. The application of the nanoparticles and the creation of a nanocomposite structure avoids this problem, and decreases the rate of degradation of the polymer against heat.
The magnetic iron oxide nanoparticles have first been synthesized by the simple method of chemical deposition, and the effects of several parameters, including concentration and ratio, were studied on the morphology of the nanoparticles. The nanoparticles were then produced through in situ polymerization in aqueous solution of polyvinyl alcohol, without the need for the environment. Fire resistance and burning tests were finally carried out.
