Svojstva standardnog polimernog i vodorazredivog premaza za vojnu maskirnu zaštitu sa dodatkom neorganskih fulerenskih nanočestica volfram disulfida (IF-WS2)

Danica Simić,Aleksandra Samolov,Dragana Lazić,Desimir Jovanović

doi:10.5937/str1701038l

Abstract

The possibility of improving the properties of the standard polymeric and a water-based coating for military camouflage protection by adding nanoparticles of inorganic fulerene-like tungsten disulphide (IF-WS2). Nanoparticles were added and dispersed in paint by ultrasonic irradiation. The paints were applied to standard steel plates, and dried, for examinations of chemical resistance to aggressive media and of the following physical-mechanical properties: hardness, flexibility, elasticity, abrasion resistance, resistance to steel balls impact and adherence. These properties were compared for paint without and with IF-WS2 nanoparticles. The effect of adding IF-WS2 on rheological properties of the paints has been examined using Dynamic Mechanical Analysis (DMA), observing viscosity as a function of the shear rate. Camouflage properties were also examined - IR reflection and colorimetry. Significant improvements of mechanical resistance to abrasion and steel balls impact, as well as hardness, have been achieved.

Highlights

COATINGS are mainly used for decorative, protective or functional purposes, but the combination of all is the most common in coatings application
The results indicate that an addition of IF-WS2 nanoparticles has an impact on the paints rheology – viscosity of the paint gets higher: paint without nanoparticles has viscosity n=29.62 mPa·s, and the paint containing 1 wt.% of IF-WS2 has viscosity n=71.77 mPa·s
Physical-mechanical properties of the polymeric coating used for military camouflage purposes were enhanced by adding IF-WS2 nanoparticles in a small concentration (1wt.% and 0.5 wt.%)

Summary

Introduction

COATINGS are mainly used for decorative, protective or functional purposes, but the combination of all is the most common in coatings application. LAZIĆ,D., etc.: PROPERTIES OF STANDARD POLYMERIC AND WATER-BASED COATINGS FOR MILITARY CAMOUFLAGE PROTECTION. Inorganic fullerene-like tungsten disulphide nanoparticles (NanoLubTM, d25°C ~ 7.5 g/cm3) were added into the standard polymeric and a water-based coatings for military camouflage protection. - for PUR dark green - using ultrasonic processor Badelin SonoPuls, at 50 W of power, during 30 min After nanoparticles deagglomeration, both components of the paint were homogenized on a mechanical stirrer during 30 min, and paints were directly applied onto steel plates in thickness of a layer approximately 50 microns, and left to dry and cure during 24 hours at the room temperature (Fig.). The reflectance was measured in the visible and nearinfrared area of the electromagnetic spectrum (650-1000 nm) using UV Probe programme package, while colour coordinates were measured in visible part of the electromagnetic spectrum (380-780 nm) using Colour programme package with 10° and D65 observer [25]

Results and discussion

Methodology

Conclusion