The Effect of Composition on Surface Properties of Polyester–melamine Thermoset Coatings

Lukey, Christopher A.; Brown, Hugh R.; Spinks, Geoffrey M.; Buxton, David P.

doi:10.1080/00218460490477134

Cited by 5 publications

(13 citation statements)

References 9 publications

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“…Figure 3B shows the high‐resolution spectra of C 1s and N 1s for the GNPs, MEL, and f‐GNPs. Assignment of these peaks is based on the literature . In the high‐resolution spectra of C 1s, the peaks at 284.8 ± 0.2 eV, 285.2 eV, and 287.9 eV are attributed to sp 2 ‐hybridized graphite‐like carbon CC, CC, and CN, respectively.…”

Section: Resultsmentioning

confidence: 99%

Direct diazotization of graphite nanoplatelets with melamine and their favorable application in epoxy resins

Qin

Zhang

2020

Polymers for Advanced Techs

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The ease of undesirable agglomeration and a low efficiency are two problems that restrict the application of graphite nanoplatelets (GNPs) in epoxy resins (EP). Herein, a new strategy with melamine (MEL) as the precursor to functionalize GNPs chemically, which form a bonding layer that is compatible with epoxy matrix, is reported.The MEL fragments with secondary amine groups were grafted uniformly on the GNPs surface by covalent junctions to exploit the diazonium chemistry. This behavior led to a better dispersion and a stronger interaction with the epoxy matrix and resulted in an enhanced glass transition temperature and bending strength, compared with the pure EP. When only 1 wt% functionalized GNPs (f-GNPs) was used, the Tg of the modified EP raised of about 15 C compared with pure EP, and the bending strength increased by approximately 39%. The dielectric constant of the EP with f-GNPs was impacted slightly, and the dielectric loss decreased. At 10 5 Hz, the dielectric loss of the EP with 1 wt% f-GNPs decreased by approximately 11% compared with pure EP. Therefore, diazotization modification of the GNPs is a useful approach to improve the compatibility in nanoparticle networks. K E Y W O R D S compatibility, epoxy resins, graphite nanoplatelets

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Section: Resultsmentioning

confidence: 99%

Direct diazotization of graphite nanoplatelets with melamine and their favorable application in epoxy resins

Qin

Zhang

2020

Polymers for Advanced Techs

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“…This is evident from XPS analysis for the modified Control 1 sample, which contains a higher concentration of nitrogen in comparison to that of the pigmented coating. The high concentration of melamine was expected to increase the number of glassy areas on the surface, hence reducing the extent of adhesion of the dirt particles [33,34].…”

Section: Resultsmentioning

confidence: 99%

Polymerization-Induced Phase Segregation and Self-Assembly of Siloxane Additives to Provide Thermoset Coatings with a Defined Surface Topology and Biocidal and Self-Cleaning Properties

Mansouri

Truong

MacLaughlin³

et al. 2019

Nanomaterials

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In this work, we report on the incorporation of a siloxane copolymer additive, poly((2-phenylethyl) methylsiloxane)-co(1-phenylethyl) methylsiloxane)-co-dimethylsiloxane), which is fully soluble at room temperature, in a rapid-cure thermoset polyester coating formulation. The additive undergoes polymerization-induced phase segregation (PIPS) to self-assemble on the coating surface as discrete discoid nanofeatures during the resin cure process. Moreover, the copolymer facilitates surface co-segregation of titanium dioxide pigment microparticulate present in the coating. Depending on the composition, the coatings can display persistent superhydrophobicity and self-cleaning properties and, surprisingly, the titanium dioxide pigmented coatings that include the siloxane copolymer additive display high levels of antibacterial performance against Gram-positive (Staphylococcus aureus) and Gram-negative (Pseudomonas aeruginosa) bacteria. This antibacterial performance is believed to be associated with the unique surface topology of these coatings, which comprise stimuli-responsive discoid nanofeatures. This paper provides details of the surface morphology of the coatings and how these relates to the antimicrobial properties of the coating.

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“…Although the choice of cutoff distance is somewhat arbitrary, it was based on several trials of various distances and was considered the most appropriate to achieve a crosslinker surface concentration that is comparable to that attained by experiment. 201 In particular, the ratio of nitrogen of isocyanate to carbon is 0.09 within a surface depth of 12 Å for both crosslinked models.…”

Section: Modelling Surface Crosslinking Of Polymersmentioning

confidence: 90%

“…Experimentally, polymer crosslinks are achieved by mixing a solution of the polymer with a solution of crosslinker. 197,201,[204][205][206] During curing, the mixture is usually cast onto metal panels or moulds and allowed to crosslink. In the case of di-isocyanate crosslinking, the curing process can occur at ambient conditions 197,198 as well as higher temperatures.…”

Section: Modelling Surface Crosslinking Of Polymersmentioning

confidence: 99%

“…It is believed that for samples with a high HMMM content, the crosslinks segregate to the upper layers of the samples. 201 This effectively reduces the extent of deformation of the surface region of the samples and in turn results in a reduced contact and adhesion between particle and surface. These experimental findings are in qualitative agreement with our observation of the simulated adhesion / mechanisms of crosslinked surfaces of varying deformability.…”

Section: Adhesion Plots Of Polyester-c 60 Systemsmentioning

confidence: 99%

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Theoretical Nanoscale Design of Self-Cleaning Coatings

Yiapanis¹,

Henry²,

Evans³

et al. 2011

Nanotechnology in Australia

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I certify that except where due acknowledgment has been made, that the work is that of the candidate alone. This body of work has not been submitted previously, in whole or in part, to qualify for any other academic award. The content of this thesis is the result of work which as been carried out since the official commencement date of the approved research program. Any editorial work, paid or unpaid, carried out by a third party is acknowledged.

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The Effect of Composition on Surface Properties of Polyester–melamine Thermoset Coatings

Cited by 5 publications

References 9 publications

Direct diazotization of graphite nanoplatelets with melamine and their favorable application in epoxy resins

Direct diazotization of graphite nanoplatelets with melamine and their favorable application in epoxy resins

Polymerization-Induced Phase Segregation and Self-Assembly of Siloxane Additives to Provide Thermoset Coatings with a Defined Surface Topology and Biocidal and Self-Cleaning Properties

Theoretical Nanoscale Design of Self-Cleaning Coatings

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