UV-LED as a New Emerging Tool for Curable Polyurethane Acrylate Hydrophobic Coating

Ghazali, Siti Khairunisah; Adrus, Nadia; Majid, Rohah A.; Ali, Fathilah; Jamaluddin, Jamarosliza

doi:10.3390/polym13040487

Cited by 18 publications

(13 citation statements)

References 42 publications

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“…The SEM micrographs of SAT-based coatings displayed a relatively smooth surface topography, before and after UV irradiation, except for SAT50-5EG where the surface was covered with some relatively wide microcracks (Figure S7). We observed that UV irradiation slightly reorganized the surface morphology of the films, in agreement with the previous literature, , particularly for the amphiphilic SAC-based coatings.…”

Section: Resultssupporting

confidence: 92%

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Reduced Ice Adhesion Using Amphiphilic Poly(Ionic Liquid)-Based Surfaces

Mossayebi

Jafari

Gurr

et al. 2023

ACS Appl. Mater. Interfaces

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Ice build-up on solid surfaces causes significant economic losses for a range of industries. One solution to this problem is the development of coatings with low ice adhesion strength. Amphiphilic poly(ionic liquid) (PIL)-based surfaces have been recently reported for antifogging/antifrosting applications. However, they have possible anti-icing properties through lowering the ice adhesion strength that have yet to be reported. Herein, we designed well-defined triblock copolymers composed of a polydimethylsiloxane component coupled with PIL segments of poly ([2 (methacryloyloxy)ethyl] trimethylammonium chloride) (PMETAC), which were subsequently UV-cured with an oligo-(ethylene glycol) dimethacrylate (OEGDMA) cross-linker. The structure−property relationships of the resultant semi-interpenetrating polymer networks (SIPNs) were investigated by varying the counterion (i.e., trimethylammonium bis-(trifluoromethanesulfonyl)imide (TFSI − )) and the content of the PIL segments and cross-linker. An ice adhesion strength as low as 13.3 ± 8.6 kPa was observed for the coating containing 12.5 wt % of PMETAC segment and 5 wt % of OEGDMA, which is one of the lowest values reported so far for the amphiphilic coatings. Characterization of the coatings in terms of surface features, wettability, and hydration states have enabled the elucidation of different deicing mechanisms. Self-lubrication due to the existence of nonfreezable bound water led to the obtained low ice adhesion strength. This work offers a new approach for the exploration of PILbased icephobic coatings for practical applications.

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Section: Resultssupporting

confidence: 92%

“…While surface roughness was not significantly varied in these coatings, the domain sizes tended to get smaller by increasing the PMETAT content. It can be suggested that UV-curing formed discrete phase structures in SAT-based SIPNs due to the incompatibility of OEGDMA with SAT triblock copolymers. ,, …”

Section: Resultsmentioning

confidence: 99%

Reduced Ice Adhesion Using Amphiphilic Poly(Ionic Liquid)-Based Surfaces

Mossayebi

Jafari

Gurr

et al. 2023

ACS Appl. Mater. Interfaces

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“…When fluorine atoms are added to polyurethane acrylate systems, they can effectively reduce their surface energy and improve their thermal stability and excellent water resistance [ 16 , 17 , 18 , 19 , 20 ]. Fluorine atoms have unique properties, which makes fluorinated polymers outstanding and unique [ 21 ]. Nevertheless, fluorinated monomers are not very compatible and come at a hefty price [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Properties of Cationic Core-Shell Fluorinated Polyurethane Acrylate

Chen,

Lu,

Chen

et al. 2023

Polymers

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Vinyl-capped cationic waterborne polyurethane (CWPU) was prepared using isophorone diisocyanate (IPDI), polycarbonate diol (PCDL), N-methyldiethanolamine (MDEA), and trimethylolpropane (TMP) as raw materials and hydroxyethyl methacrylate (HEMA) as a capping agent. Then, a crosslinked FPUA composite emulsion with polyurethane (PU) as the shell and fluorinated acrylate (PA) as the core was prepared by core-shell emulsion polymerization with CWPU as the seed emulsion, together with dodecafluoroheptyl methacrylate (DFMA), diacetone acrylamide (DAAM), and methyl methacrylate (MMA). The effects of the core-shell ratio of PA/PU on the surface properties, mechanical properties, and heat resistance of FPUA emulsions and films were investigated. The results showed that when w(PA) = 30~50%, the stability of FPUA emulsion was the highest, and the particles showed a core-shell structure with bright and dark intersections under TEM. When w(PA) = 30%, the tensile strength reached 23.35 ± 0.08 MPa. When w(PA) = 50%, the fluorine content on the surface of the coating film was 14.75% and the contact angle was as high as 98.5°, which showed good hydrophobicity; the surface flatness of the film was observed under AFM. It is found that the tensile strength of the film increases and then decreases with the increase in the core-shell ratio and the heat resistance of the FPUA film is gradually increased. The FPUA film has excellent properties such as good impact resistance, high flexibility, high adhesion, and corrosion resistance.

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“…At present, the UV-LED curing is primarily exploited for the preparation of photocurable coatings or inks [11,12]: as a matter of fact, only a very limited number of research works specifically involving UV-LED curing has been addressed to the design, preparation and characterization of polymeric composite systems. In particular, one paper investigated the effect of the presence of 5 wt.% of phyllosilicate (Cloisite 30B) on the thermal and barrier properties of an UV-LED cured acrylic system [13].…”

Section: Introductionmentioning

confidence: 99%

UV-LED Curable Acrylic Films Containing Phosphate Glass Powder: Effect of the Filler Loading on the Thermal, Optical, Mechanical and Flame Retardant Properties

Pugliese

Malucelli

2022

Polymers

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In this work, we thoroughly investigate the effects of the incorporation of a phosphate glass micrometric powder on the morphology, as well as on the thermal, optical, mechanical and flame retardant properties of UV-LED curable acrylic films. To this aim, the filler loading was changed within 10 and 50 wt.%. UV-LED initiated curing was selected as a fast and reliable system, as the standard UV-curing process was not suitable because of the presence of the glass powder that decreased the quantum efficiency during the UV exposure, hence preventing the transformation of the liquid system into a solid network. The glass powder slightly increased the glass transition temperature of the acrylic network, hence showing a limited effect on the chain segments mobility; besides, increasing filler loadings were responsible for a progressive decrease of the transparency of films, irrespective of a marginal effect on their refractive index. Conversely, the presence of increasing amounts of phosphate glass improved the thermal and thermo-oxidative stability of the cured products. Besides, phosphate glass was capable of remarkably enhancing the flame retardance of the acrylic network at 50 wt.% loading, which achieved self-extinction in vertical flame spread tests (and was V-0 rated). This formulation, as assessed by forced-combustion tests, also displayed a remarkable decrease of peak of Heat Release Rate and Total Heat Release (by 44 and 33%, respectively) and of Total Smoke Release and Specific Extinction Area (by 53 and 56%, respectively). Further, the filler promoted an increase of the stiffness and surface hardness of the films, at the expense of a decrease in ductility. All these findings may justify the potential use of these composite films as flame retardant coatings for different flammable substrates.

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UV-LED as a New Emerging Tool for Curable Polyurethane Acrylate Hydrophobic Coating

Cited by 18 publications

References 42 publications

Reduced Ice Adhesion Using Amphiphilic Poly(Ionic Liquid)-Based Surfaces

Reduced Ice Adhesion Using Amphiphilic Poly(Ionic Liquid)-Based Surfaces

Synthesis and Properties of Cationic Core-Shell Fluorinated Polyurethane Acrylate

UV-LED Curable Acrylic Films Containing Phosphate Glass Powder: Effect of the Filler Loading on the Thermal, Optical, Mechanical and Flame Retardant Properties

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