Functionalized hexagonal boron nitride nano-coatings for protection of transparent plastics

Tran, Thu V.; Usta, Aybala; Asmatulu, Ramazan

doi:10.1117/12.2235331

Cited by 1 publication

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“…Overall, this study showed that the resistance to UV degradation of the PU coating could be improved by incorporating s-G or s-h-BN nanoadditives. It also showed that coatings with s-h-BN nanoparticles exhibited superior UV resistance than the corresponding coating with s-G. 22,23…”

Section: Discussionmentioning

confidence: 99%

“…20 Nanotubes and nanoflakes have been studied as additives for coatings and corrosion prevention. 9,[21][22][23] However, the covalent bonding between PU and graphene requires extra steps in the synthesis process, and past studies have not investigated the impact of UV degradation and hydrophobicity on a PU coating with silane-functionalized graphene and/or h-BN as the nanoadditive. Silane functionalization of graphene or h-BN could enhance the compatibility and interaction with the polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

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Polyurethane nanocomposite coating with silanized graphene and hexagonal boron nitride as nanoadditives for improved resistance against ultraviolet degradation

Tran

Abedin

Usta

et al. 2018

Journal of Composite Materials

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Polyurethane coatings modified with silanized graphene and/or hexagonal boron nitride as nanoadditives were synthesized, characterized, and tested for ultraviolet degradation and hydrophobicity. These coatings containing various weight percentages (wt%) of nanoadditives were prepared and investigated. The coating composition was characterized using Fourier transform infrared spectroscopy. The silanization of nanoadditives was characterized using scanning electron microscopy. The glass transition temperatures (Tg) of the nanocomposite coatings were determined using differential scanning calorimeter; it was observed that the presence of nanoadditives in the coatings impacted the Tg indicating their interference with the polyurethane chains and structures. The change in the coating thickness and water contact angle after ultraviolet light exposure was also studied. Exposure of the coatings to ultraviolet light led to a decrease in the coating thickness and hydrophobicity. With the increasing content of nanoadditives, the decrease in the coating thickness was lower and the rate of decrease of water contact angle was slow. Polyurethane coatings with 0.8 wt% silanized hexagonal boron nitride nanoparticles exhibited minimum reduction in coating thickness and the slowest rate of decrease in the water contact angle.

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Section: Discussionmentioning

confidence: 99%