Synthesis of Si-containing macro-RAFT agent for the water-borne polyacrylate polyurethane with anti-graffiti coating applications

Zheng, Xumin; Cai, Zhengchun; Lyu, Zhengwei; Chen, Yongkang; Ji, Yongxin

doi:10.1016/j.mtcomm.2020.101590

Cited by 3 publications

(2 citation statements)

References 37 publications

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“…Mention antismudge coatings and what comes to mind is they endow liquid repellency and self-cleaning ability to a coated surface on which contaminants can be easily removed. Therefore, these functional coatings can be used to maintain clean surfaces for glass curtain walls, metal surfaces, oil pipelines, computers, smartphone displays, kitchen appliances, communal facilities, and so on. − Recent developments of antismudge coatings modified with low-surface-tension constituents as the dewetting enabler that exhibited exceptional repellency against water, oil, solvents, inks, paints, and other contaminants have received increasing interest. − …”

Section: Introductionmentioning

confidence: 99%

High-Performance Bio-Based Polyurethane Antismudge Coatings Using Castor Oil-Based Hyperbranched Polyol as Superior Cross-Linkers

Wei

Zeng

Yong

2021

ACS Appl. Polym. Mater.

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Bio-based antismudge coating, as a substitute for the petroleum-based one, has excellent liquid repellency and self-cleaning ability, which is of great value to keep a coated surface free of contaminants. In this study, we report a facile strategy to fabricate high-performance biobased hyperbranched polyurethane antismudge coatings. More specifically, a castor oil-based hyperbranched polyol was employed as a coating precursor, a hexamethylene diisocyanate trimer was used as the curing agent, and a mono-hydroxyl-terminated poly(dimethysiloxane) (PDMS-OH) was introduced as a low-surface-tension lubricant through covalent bonding. Consequently, a highly transparent smooth coating was obtained after the coating solution was completely cured. The coating loaded with 0.5 wt % PDMS-OH exhibited superb liquid repellency and self-cleaning ability, as attested by liquids such as water, hexadecane, peanut oil, pump oil, salt solution, strong acid, and strong alkali solutions that could slide off the coated surfaces cleanly. In addition, even after 1000 writing and erasing cycles, the coating still retained its ability to contract ink traces and the contracted ink could be easily removed with tissue paper. Apart from antigraffiti and antifingerprint performance, the coating applied on tin plate surfaces showed an adhesion grade of 5B and a pencil hardness of 3H and displayed superior corrosion resistance. Furthermore, this mechanically robust coating could withstand 1000 abrasion cycles without sacrificing its ink contraction ability. Therefore, this biobased antismudge coating should provide an alternative avenue for developing green and sustainable functional coatings.

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Section: Introductionmentioning

confidence: 99%

High-Performance Bio-Based Polyurethane Antismudge Coatings Using Castor Oil-Based Hyperbranched Polyol as Superior Cross-Linkers

Wei

Zeng

Yong

2021

ACS Appl. Polym. Mater.

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“…On the other hand, physical, chemical, and biological processes may act, in isolation or in combination, yielding to the loss of surface integrity or even to structural failure. To provide protection against graffiti, many polymer-based coatings, displaying suitable properties (mainly oleo/hydrophobicity), have been formulated [ 12 , 13 , 14 , 15 , 16 ], but actually the anti-graffiti action needs to be proved on the particular stone material requiring protection. Biodeterioration caused by birds is another main cause of damage for stone materials in buildings, statues, and monuments [ 17 , 18 ], especially in historic city centers.…”

Section: Introductionmentioning

confidence: 99%

Novel Nano-Filled Coatings for the Protection of Built Heritage Stone Surfaces

Lettieri

Masieri²,

Frigione

2021

Nanomaterials

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An experimental nano-filled coating, based on a fluorine resin containing SiO2 nano-particles, was applied on calcareous stones, representative of materials used in buildings and monuments of the Mediterranean basin; for comparison purposes, two commercial products were applied on the same substrates. The efficacy of the protective treatments was assessed by analyzing different characteristics of the three experimental/commercial products, i.e., color changes and permeability to water vapor to evaluate the treatments’ harmlessness; capillary water absorption and water stone contact angle to evaluate the protection against water ingress; oleophobicity of the treated surfaces and the behavior under staining by acrylic blue-colored spray paint and felt-tip marker to verify the anti-graffiti action. Finally, the properties of the treated stone surfaces were analyzed also after the application of pancreatin, used to simulate bird excreta (guano). The protective coatings were found to promote graffiti removal, reducing also the detrimental effects due to simulated guano. The experimental nano-filled product, in addition, was able to provide outstanding performance but using smaller amounts of product in comparison to commercial systems.

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Recent developments in the anti-graffiti coatings: an attentive review

Amrutkar

Mestry

et al. 2022

J Coat Technol Res

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Synthesis of Si-containing macro-RAFT agent for the water-borne polyacrylate polyurethane with anti-graffiti coating applications

Cited by 3 publications

References 37 publications

High-Performance Bio-Based Polyurethane Antismudge Coatings Using Castor Oil-Based Hyperbranched Polyol as Superior Cross-Linkers

High-Performance Bio-Based Polyurethane Antismudge Coatings Using Castor Oil-Based Hyperbranched Polyol as Superior Cross-Linkers

Novel Nano-Filled Coatings for the Protection of Built Heritage Stone Surfaces

Recent developments in the anti-graffiti coatings: an attentive review

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