1 research outputs found
Production method of nanostructured wood-polymer composition with microwave application
ABSTRACT: Introduction. Currently, wood-polymer compositions (WPC) are widely used in the national economy and construction. The composition of WPC varies widely depending on the further purpose. Improving the binding quality in the wood-polymer
system is one of the promising areas for enhancing operational characteristics. Organic and inorganic substrates nanostructured with
individual substances, including metal particles, are used as binding components. In the petrochemical industry, most high-capacity
productions use catalysts based on active carriers like heavy metals when developing targeted products for various purposes. After
several stages of regeneration, recovering these heavy metals becomes impossible. Consequently, spent catalysts accumulate in
sedimentation tanks and sludge collectors, lacking an efficient method for disposal and secondary use. One of the components
included in the composition of spent catalysts is chromium (+6), which belongs to carcinogenic metals. Numerous disposal methods
are currently inadequate for neutralizing this metal on an industrial scale, which is of interest for research. Methods and materials.
The study is aimed at converting carcinogenic chromium (+6) into non-carcinogenic chromium (+3) by ultrahigh frequency exposure
(microwave), which will open up opportunities for its use as a chromium-containing nanocomplex binding a tree-polymer. Results
and discussions. The ultrahigh-frequency effect on the mixture of wood-polymer composition and spent chromium (+6) causes an
increase in the penetration depth of high–frequency waves, characterized by a uniform distribution of energy over the entire area
of the composite, which is explained by the reduction of chromium (VI) oxide into chromium (III) oxide, and there is also a change
in the color of the nanostructured wood-polymer composition (WP – compositions) from yellow to malachite. Conclusion. This
study, which consists in the application of microwave exposure to the wood-nanoparticle-polymer system, confirms the receipt of
a durable construction product and its use in the construction of roofs, facade boards, sidewalks, piers, port facilities, et