UV-curable electromagnetic shielding composite films produced through waterborne polyurethane-acrylate bonded graphene oxide: preparation and effect of different diluents on the properties

Abstract

UV-curable electromagnetic shielding composite films (UV-EMSF) were prepared with graphene oxide/polyurethane-acrylate (GO-PUA) oligomers, different diluents (styrene-butyl acrylate or tripropyleneglycol diacrylate-butyl acrylate or trimethylol propane triacrylate-butyl acrylate) and photoinitiator (2-hydroxy-2-methyl-1-phenyl-1-propanone). The chemical structures, morphology, crystallinity and thermal behavior of UV-EMSF were investigated by Fourier transform-infrared spectroscopy, scanning electron microscope, X-ray diffraction and thermogravimetric analysis. The stability, optical transparency and electrical conductivity of emulsions were measured. The effects of different diluents on the properties such as gel content, solvent resistance, hardness, tensile strength, contact angle and adhesion force were systemically studied. It was found that the emulsions had a good stability and the electrical conductivity of the emulsions indicated that the addition of GO had an effect on the electric conductivity. The prepared UV-EMSF composites with low-cost, low pollution and easy-to-prepare low resistivity have a great potential application in different areas such as electronic, electrical, communications, plastic coatings and wood finishes.

UV-curable waterborne polyurethane coatings: A state-of-the-art and recent advances review

“…The incorporation of inorganic nanoparticles into a UV-WPU matrix is an effective strategy to enhance some properties and provide specific functionalities to this system [152]. Hardness, tensile strength, water absorption, solvent resistance, and thermal behavior of UV-WPUs can be significantly improved by adding nanoparticles like acryloyl chloride modified lysozyme [134], silver [90,157], graphene oxide [107,112,113], surfactant-modified TiO 2 /reduced graphene oxide [45], graphitic carbon nitride [94], and Fe 3 O 4 [70,71]. These nanoparticles also provide excellent antibacterial activity, electrical conductivity, good electronic stability, self-cleaning ability in photocatalysis, and unique magnetic behavior to the coatings.…”

Developments in aqueous polyurethane and polyurethane-acrylic dispersion technology. Part II. Polyurethane-acrylic dispersions and modification of polyurethane and polyurethane-acrylic dispersions

“…APUAD modified with graphene oxide were also recently studied [80,81] and it was found that just 0.015 % of that nanofiller was sufficient to obtain much improved water resistance of the film while higher amounts were not as effective in that regard. Other nanofillers -nano ZnO and superparamagnetic iron oxide (SPIO) were also used for modification of APUD [71,82] and nanosilver was used for modification of 2-component waterborne polyurethane based on water-dispersible polyol -water-dispersible polyisocyanate system [83].…”