Spherical colloidal photonic pigments with saturated structural colors through temperature-controlled polymer nanoparticle assembly

Areias, Laurinda R.P.; Farinha, José Paulo S.

doi:10.1016/j.dyepig.2022.110153

Cited by 6 publications

(16 citation statements)

References 67 publications

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“…25,26 Briefly, PNPs composed of a polystyrene core and a shell of poly(methyl methacrylate-co-acrylic acid) with different diameters were synthesized by emulsion polymerization by varying the amount of sodium dodecyl sulfate. 25 PD nanoparticles with 92 nm average diameter were synthesized by the oxidation and self-polymerization of dopamine hydrochloride in basic aqueous media at room temperature. 26 Aqueous dispersions of the PNP (∼0.2 volume fraction), either with or without 3 wt % PD (relative to the PNPs), were assembled inside droplet templates obtained by microfluidic emulsification (Figure 1), originating the spherical photonic pigments upon water evaporation.…”

Section: Experimental Partmentioning

confidence: 99%

Waterborne Polymer Coatings with Bright Noniridescent Structural Colors

Areias,

Farinha

2023

ACS Appl. Mater. Interfaces

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Structural color pigments offer an efficient, sustainable, and environmentally friendly approach to obtain waterborne polymer coatings. We developed polymer-based spherical photonic pigments to incorporate in aqueous dispersions of polymer nanoparticles used to obtain waterborne polymer films. Our spherical photonic pigments are assembled from polymer nanoparticles and are highly stable in water dispersion, maintaining their optical properties in the final polymer films. Unlike conventional dyes and pigments, which are prone to photobleaching because they are based on the absorption of light, photonic pigments rely on the selective reflection of light by their nanostructure and therefore are not photodegraded. Furthermore, different colors can be obtained from the same materials, changing only their nanostructure, in this case, the size of the polymer nanoparticles. Our novel spherical photonic pigments are noniridescent and can be incorporated in aqueous polymer nanoparticle dispersions without deteriorating their structure to produce waterborne polymer coatings with structural color. This approach for structural colored waterborne polymer coatings is efficient, simple, and environmentally friendly, offering excellent prospects for application in paints and coatings.

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Section: Experimental Partmentioning

confidence: 99%

Waterborne Polymer Coatings with Bright Noniridescent Structural Colors

Areias,

Farinha

2023

ACS Appl. Mater. Interfaces

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“…The preparation of the protective layer on the PC surface effectively improved the structural stability of the patterned PCs while retaining the optical properties of the PCs. The proposed method was combined with a conventional responsive substance so as to produce double anti-counterfeiting patterned PCs, which suggested a promising future in both the highly efficient preparation of patterned PCs and the development of the PCs in anti-counterfeiting field. , …”

Section: Introductionmentioning

confidence: 99%

“…Photonic crystals (PCs) are a kind of crystal materials composed of periodic micro- or nanostructures with different dielectric constants. , Patterned PCs possess not only beautiful structural colors but also a vivid and unique iridescent effect. − They have been widely used in textile materials, − optical devices, , anti-fake labels, − and so on. The combination of patterned PCs and traditional textile processing can not only endow the textile with a unique iridescent pattern of high saturation and brightness , but also promote the development and application of bionic PC structural coloration technology in the textile printing and dyeing industry. − …”

Section: Introductionmentioning

confidence: 99%

“…The proposed method was combined with a conventional responsive substance so as to produce double anti-counterfeiting patterned PCs, which suggested a promising future in both the highly efficient preparation of patterned PCs and the development of the PCs in anti-counterfeiting field. 31,32 ■ EXPERIMENTAL SECTION Reagents and Materials. Styrene (St), sodium dodecyl sulfate (SDS), potassium persulfate (KPS), rhodamine B (Aladdin Reagent Co., Ltd.), nano-carbon black (CB) (Tianjin Kemiao Chemical Reagent Co., Ltd.), and glycerol (Hangzhou Gaojing Fine Chemical Co., Ltd.) used in this study were analytically pure chemicals; fluorine-containing hydrophobic finishing agent (Zhejiang TransFar Co., Ltd.) and encapsulation polymer (Shanghai Sisheng Polymer Materials Co., Ltd.) were industrial grade chemicals and used as received.…”

Section: ■ Introductionmentioning

confidence: 99%

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Preparation of Patterned Photonic Crystals with High Fastness and Iridescence Effect via Resist-Screen Printing

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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Patterned photonic crystals (PCs) have great application potential in the textile field owing to their attractive high-saturation iridescent effect. Herein, based on the idea of resist printing, a novel approach to constructing patterned photonic crystals via screen printing was designed and achieved. A colorless pattern with hydrophilic and hydrophobic difference was firstly prepared by screen printing using a hydrophilic polymer paste printed on a hydrophobic fabric, and then the PC structurally colored pattern was obtained through scrapping liquid photonic crystals (LPCs) on the fabric because the LPCs were spread and assembled in the hydrophilic pattern but resisted in the hydrophobic areas, so that to realize the rapid preparation of patterned PCs on the fabric surface. Once the contact angle difference (ΔCA) between the hydrophilic and hydrophobic areas exceeded 80, the "color paste" (that is, LPCs) did not stain the hydrophobic area at all after scrapping, and the assembled PCs pattern showed good contour sharpness and highsaturation iridescence effect. The complex multistructural color patterns on the fabrics were achieved by adjusting the size of nanospheres and using multistep printing and scrapping. The preparation of the protective layer on the PC surface effectively improved the structural stability of the patterned PCs while retaining the optical properties of the pattern. This patterned PCs preparation method was combined with a conventional responsive substance (rhodamine B) to obtain double anti-counterfeiting patterned PCs with the iridescence effect. The results suggested a promising future in both the highly efficient preparation of patterned PCs and the application of PCs in the anti-counterfeiting field.

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“…Hence, such pigments represent a central goal in the future developments of paints, cosmetics, and displays. [4][5][6][7][8] So far, most efforts to develop structurally colored pigments have been based on confining the self-assembly of colloidal particles [9,10] or liquid crystals [11] in specific geometries. However, significant limitations of synthesizing large quantities of photonic pigments based on these amorphous arrays include the lack of control over incoherent and multiple scattering and the difficulty in producing pigments with distinct colors across the entire visible spectrum.…”

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confidence: 99%

Robust Full‐Spectral Color Tuning of Photonic Colloids

Dodero

Djeghdi

Bauernfeind

et al. 2022

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structure periodicity, thereby enabling a photonic response across the entire visible spectrum. [1][2][3] Among these engineered systems, photonic pigments are of particular interest, as they offer pure and brilliant coloration free from chemical-or photo-bleaching. Hence, such pigments represent a central goal in the future developments of paints, cosmetics, and displays. [4][5][6][7][8] So far, most efforts to develop structurally colored pigments have been based on confining the self-assembly of colloidal particles [9,10] or liquid crystals [11] in specific geometries. However, significant limitations of synthesizing large quantities of photonic pigments based on these amorphous arrays include the lack of control over incoherent and multiple scattering and the difficulty in producing pigments with distinct colors across the entire visible spectrum. [12] A promising alternative is the 3D confined self-assembly of block copolymers (BCPs) in emulsion droplets, which, in principle, represents a user-friendly and scalable procedure to fabricate polymer-based PhCs with vivid coloration spanning the entire visible spectrum. [13,14] BCPs exhibit rapid assembly kinetics in solution, macroscopic ordering into self-assembled morphologies, tolerance to high loading of functional additives, and the possibility to manipulate the produced coloration simply by tuning the polymer chain length and structure. [15,16] Several efforts employing BCPs focused on fabricating planar multilayer structures that show brilliant but iridescent coloration, [17][18][19][20][21] while more recent studies showed that linear symmetric BCPs can form a concentric lamellar structure (i.e., onion-like microspheres) within spherical confinement in emulsion droplets, resulting in photonic multilayered particles. [22][23][24][25][26] These ordered systems comprise two blocks that form lamellar domains, each having a distinct refractive index, and show strong reflection when Bragg reflection conditions are satisfied, thus holding promise as non-iridescent photonic pigments due to their spherical shape. [15,24] Controlling the optical properties of such photonic pigments generally requires the synthesis of long BCPs whose self-assembly kinetic is slowed by their high molecular weight. Domain spacings beyond 100 nm can be achieved, for example, by using bottle-brush BCPs as their non-linear chain architecture with grafted side chains limits chain entanglement thereby accelerating structural reorganization. [27,28] Alternatively, Creation of color through photonic morphologies manufactured by molecular self-assembly is a promising approach, but the complexity and lack of robustness of the fabrication processes have limited their technical exploitation. Here, it is shown that photonic spheres with full-color tuning across the entire visible spectrum can be readily and reliably achieved by the emulsification of solutions containing a block copolymer (BCP) and two swelling additives. Solvent diffusion out of the emulsion droplets gives rise to 20-150 µm-size...

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Spherical colloidal photonic pigments with saturated structural colors through temperature-controlled polymer nanoparticle assembly

Cited by 6 publications

References 67 publications

Waterborne Polymer Coatings with Bright Noniridescent Structural Colors

Waterborne Polymer Coatings with Bright Noniridescent Structural Colors

Preparation of Patterned Photonic Crystals with High Fastness and Iridescence Effect via Resist-Screen Printing

Robust Full‐Spectral Color Tuning of Photonic Colloids

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