Polymer-based pigmented coatings on flexible substrates with spectrally selective characteristics to improve the thermal properties

Manara, Jochen; Reidinger, M.; Rydzek, M.; Arduini-Schuster, M.

doi:10.1016/j.porgcoat.2010.09.024

Cited by 30 publications

(9 citation statements)

References 6 publications

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“…Based on Figure 3 , the roughness of the rGO-FAl particle is in nanometer scale, similar to the wavelength of visible light. When visible light reaches the surface of the composite powders, the rough surface will cause strong multi-correlation scattering and absorption [ 27 , 28 ]. In addition, the absorption path of radiation in the filler system is increased; thus, the filler has the effect of extinction and the spectral reflectance is decreased.…”

Section: Resultsmentioning

confidence: 99%

Low Infrared Emissivity Coating Based on Graphene Surface-Modified Flaky Aluminum

et al. 2018

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A low infrared emissivity coating was prepared using graphene surface-modified flaky aluminum complex powders (rGO-FAl) as fillers. The flaky aluminum powders were coated with graphene through chemical bonding. Compared with pure flaky aluminum, the Vis-NIR diffuse reflectance of rGO-FAl complex powders was significantly decreased, which was beneficial to the low glossiness of the coating. After the modification, the glossiness at 60° of the coating with 40% (mass fraction) pigments decreased from 12.8 to 6.7, while the coating maintained low infrared emissivity (0.238~0.247) at a spectral range of 8–14 μm. In the electrochemical impedance spectroscopy (EIS) measurement, at the lowest frequency, the impedance of the Al-rGO test plate was at least two orders of magnitude greater than that of the control Al test plate, and the graphene layer significantly increased the bandwidth of the maximum phase angle, which indicates a good protective effect of the ultra-thin graphene layer on metal in a corrosive environment. The coating with 40% rGO-FAl complex powders can maintain its appearance after 500 h of salt spray corrosion testing. In contrast, the color of the coating with the original aluminum powders changed after only 300 h.

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Section: Resultsmentioning

confidence: 99%

Low Infrared Emissivity Coating Based on Graphene Surface-Modified Flaky Aluminum

et al. 2018

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“…To this end, Manara and coworkers selected a suitable size of aluminum spheres and combined them with various metal oxide pigments in order to provide polyester fi bers with a visibly appealing color at the same time as reducing the thermal emittance from 0.9 to below 0.3. [ 41 ] Liu and colleagues, who linked the K-M and Lorenz-Mie approach to demonstrate that the optimum diameter of aluminum spheres for low emittance infrared coatings ( ε = 0.5 at λ = 10 μ m) is about 0.9 μ m. [ 42 ] The authors go on to postulate that an even further improved pigment might comprise non-spherical particles due to their higher scattering cross-section. In the following section we will see why such a notion is fully justifi ed.…”

Section: Studies Assuming Predominantly Spherical Particlesmentioning

confidence: 99%

Painting by Numbers: Nanoparticle‐Based Colorants in the Post‐Empirical Age

et al. 2011

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The visual appearance of the artificial world is largely governed by films or composites containing particles with at least one dimension smaller than a micron. Over the past century and a half, the optical properties of such materials have been scrutinized and a broad range of colorant products, based mostly on empirical microstructural improvements, developed. With the advent of advanced synthetic approaches capable of tailoring particle shape, size and composition on the nanoscale, the question of what is the optimum particle for a certain optical property can no longer be answered solely by experimentation. Instead, new and improved computational approaches are required to invert the structure-function relationship. This progress report reviews the development in our understanding of this relationship and indicates recent examples of how theoretical design is taking an ever increasingly important role in the search for enhanced or multifunctional colorants.

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“…They can be divided into thickness-insensitive, spectrally selective, [6][7][8][9][10] and thickness-sensitive, spectrally selective (TSSS) paints. 11 The development of both types is interlinked in the fields of absorptive pigments and their dispersions, 12 binders, 13 and durability.…”

Section: Introductionmentioning

confidence: 99%

The Impact of a Silane Pigment Treatment on the Properties of Thickness-sensitive Spectrally Selective Paints

Steinbücher

Venturini

Hafner

et al. 2017

ACSi

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Thickness-sensitive, spectrally selective paints based on a silane treatment of pigments were prepared with different pigment-volume concentrations. The critical pigment-volume concentration was determined by means of electrochemical impedance spectroscopy, while the pigment particle size distribution was determined with ultrasound spectroscopy. The selectivity versus thickness relation of a paint with a near-critical pigment-volume concentration was studied spectroscopically through performance criteria. Its nonlinearity was shown to be related to the surface topography. This relation was further supported by hydrophobicity measurements. Heat-gathering tests in a simulated solar collector supported the spectroscopic determination of an optimal dry-film thickness.

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Polymer-based pigmented coatings on flexible substrates with spectrally selective characteristics to improve the thermal properties

Cited by 30 publications

References 6 publications

Low Infrared Emissivity Coating Based on Graphene Surface-Modified Flaky Aluminum

Low Infrared Emissivity Coating Based on Graphene Surface-Modified Flaky Aluminum

Painting by Numbers: Nanoparticle‐Based Colorants in the Post‐Empirical Age

The Impact of a Silane Pigment Treatment on the Properties of Thickness-sensitive Spectrally Selective Paints

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