Bio-inspired self-healing structural color hydrogel

Biologically inspired self-healing structural color hydrogels were developed by adding a glucose oxidase (GOX)- and catalase (CAT)-filled glutaraldehyde cross-linked BSA hydrogel into methacrylated gelatin (GelMA) inverse opal scaffolds. The composite hydrogel materials with the polymerized GelMA scaffold could maintain the stability of an inverse opal structure and its resultant structural colors, whereas the protein hydrogel filler could impart self-healing capability through the reversible covalent attachment of glutaraldehyde to lysine residues of BSA and enzyme additives. A series of unprecedented structural color materials could be created by assembling and healing the elements of the composite hydrogel. In addition, as both the GelMA and the protein hydrogels were derived from organisms, the composite materials presented high biocompatibility and plasticity. These features of self-healing structural color hydrogels make them excellent functional materials for different applications.

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Anisotropic structural color particles from colloidal phase separation

Science Advances ◽

10.1126/sciadv.aay1438 ◽

2020 ◽

Vol 6 (2) ◽

pp. eaay1438 ◽

Cited By ~ 21

Author(s):

Huan Wang ◽

Yuxiao Liu ◽

Zhuoyue Chen ◽

Lingyu Sun ◽

Yuanjin Zhao

Keyword(s):

Colloidal Crystal ◽

Structural Color ◽

Inverse Opal ◽

Phase Separations ◽

Structural Colors ◽

Structure Morphology ◽

Dynamic Cell ◽

Cell Monitoring ◽

Colloid Nanoparticles ◽

Component Phase

Structural color materials have been studied for decades because of their fascinating properties. Effects in this area are the trend to develop functional structural color materials with new components, structures, or morphologies for different applications. In this study, we found that the coassembled graphene oxide (GO) and colloid nanoparticles in droplets could form component phase separations, and thus, previously unknown anisotropic structural color particles (SCPs) with hemispherical colloidal crystal cluster and oblate GO component could be achieved. The anisotropic SCPs, as well as their inverse opal hydrogel derivatives, were endowed with brilliant structural colors and controllable capabilities of fixation, location, orientation, and even responsiveness due to their specific structure, morphology, and components. We have also demonstrated that the anisotropic hydrogel SCPs with these features were ideal candidates for dynamic cell monitoring and sensing. These properties indicate that the anisotropic SCPs and their derivatives have huge potential values in biomedical areas.

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Bring Structural Color to Silk Fabrics

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.441.183 ◽

2012 ◽

Vol 441 ◽

pp. 183-186 ◽

Cited By ~ 7

Author(s):

Ying Ying Diao ◽

Xiang Yang Liu

Keyword(s):

Photonic Crystals ◽

Three Dimensional ◽

Structural Color ◽

Inverse Opal ◽

3D Face ◽

Lattice Constants ◽

Inverse Opal Structure ◽

Face Centre Cubic ◽

Fine Structures ◽

Silk Fabrics

By mimicking the fine structures of butterflies wings and peacocks feathers, we have successfully brought structural color to silk fabrics. The three-dimensional (3D) face centre cubic (FCC) opal or inverse opal structure was constructed on the surface of the silk fabrics by materials assembly. The diversified colors were achieved by precisely controlling the lattice constants of the photonic crystals.

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Fluoropolymer-Containing Opals and Inverse Opals by Melt-Shear Organization

Molecules ◽

10.3390/molecules24020333 ◽

2019 ◽

Vol 24 (2) ◽

pp. 333 ◽

Cited By ~ 4

Author(s):

Julia Kredel ◽

Christian Dietz ◽

Markus Gallei

Keyword(s):

Optical Properties ◽

Optical Sensors ◽

Matrix Material ◽

Functional Materials ◽

Building Blocks ◽

Core Shell ◽

Inverse Opal ◽

Shell Material ◽

Inverse Opals ◽

Structural Colors

The preparation of highly ordered colloidal architectures has attracted significant attention and is a rapidly growing field for various applications, e.g., sensors, absorbers, and membranes. A promising technique for the preparation of elastomeric inverse opal films relies on tailored core/shell particle architectures and application of the so-called melt-shear organization technique. Within the present work, a convenient route for the preparation of core/shell particles featuring highly fluorinated shell materials as building blocks is described. As particle core materials, both organic or inorganic (SiO2) particles can be used as a template, followed by a semi-continuous stepwise emulsion polymerization for the synthesis of the soft fluoropolymer shell material. The use of functional monomers as shell-material offers the possibility to create opal and inverse opal films with striking optical properties according to Bragg’s law of diffraction. Due to the presence of fluorinated moieties, the chemical resistance of the final opals and inverse opals is increased. The herein developed fluorine-containing particle-based films feature a low surface energy for the matrix material leading to good hydrophobic properties. Moreover, the low refractive index of the fluoropolymer shell compared to the core (or voids) led to excellent optical properties based on structural colors. The herein described fluoropolymer opals and inverse opals are expected to pave the way toward novel functional materials for application in fields of coatings and optical sensors.

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Photo-tuning of structural color of composite material consisting of inverse opal structure and azo-polymer liquid crystal

10.1117/12.734826 ◽

2007 ◽

Author(s):

S. Kurihara ◽

M. Moritsugu ◽

Shoichi Kubo ◽

Sun-nam Kim ◽

Tomonari Ogata ◽

...

Keyword(s):

Composite Material ◽

Liquid Crystal ◽

Structural Color ◽

Inverse Opal ◽

Polymer Liquid ◽

Azo Polymer ◽

Inverse Opal Structure ◽

Polymer Liquid Crystal

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Zn-Co-CeO2 vs. Zn-Co Coatings: Effect of CeO2 Sol in the Enhancement of the Corrosion Performance of Electrodeposited Composite Coatings

Metals ◽

10.3390/met11050704 ◽

2021 ◽

Vol 11 (5) ◽

pp. 704

Author(s):

Marija Riđošić ◽

Nebojša D. Nikolić ◽

Asier Salicio-Paz ◽

Eva García-Lecina ◽

Ljiljana S. Živković ◽

...

Keyword(s):

Corrosion Resistance ◽

Healing Rate ◽

Electrochemical Impedance ◽

Composite Coatings ◽

Self Healing ◽

Kelvin Probe ◽

Artificial Defect ◽

Volta Potential ◽

Superior Corrosion Resistance ◽

The Stability

Electrodeposition and characterization of novel ceria-doped Zn-Co composite coatings was the main goal of this research. Electrodeposited composite coatings were compared to pure Zn-Co coatings obtained under the same conditions. The effect of two ceria sources, powder and home-made sol, on the morphology and corrosion resistance of the composite coatings was determined. During the electrodeposition process the plating solution was successfully agitated in an ultrasound bath. The source of the particles was found to influence the stability and dispersity of plating solutions. The application of ceria sol resulted in an increase of the ceria content in the resulting coating and favored the refinement from cauliflower-like morphology (Zn-Co) to uniform and compact coral-like structure (Zn-Co-CeO2 sol). The corrosion resistance of the composite coatings was enhanced compared to bare Zn-Co as evidenced by electrochemical impedance spectroscopy and scanning Kelvin probe results. Zn-Co doped with ceria particles originating from ceria sol exhibited superior corrosion resistance compared to Zn-Co-CeO2 (powder) coatings. The self-healing rate of artificial defect was calculated based on measured Volta potential difference for which Zn-Co-CeO2 (sol) coatings exhibited a self-healing rate of 73.28% in a chloride-rich environment.

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Carbon Nitride Quantum Dots Modified TiO2 Inverse Opal Photonic Crystal for Solving Indoor VOCs Pollution

Catalysts ◽

10.3390/catal11040464 ◽

2021 ◽

Vol 11 (4) ◽

pp. 464

Author(s):

Jie Yu ◽

Angel Caravaca ◽

Chantal Guillard ◽

Philippe Vernoux ◽

Liang Zhou ◽

...

Keyword(s):

Quantum Dots ◽

Carbon Nitride ◽

Sol Gel ◽

Green Energy ◽

Inverse Opal ◽

Oxidation Reactions ◽

Composite Photocatalyst ◽

Colloidal Photonic Crystals ◽

Inverse Opal Structure

Indoor toxic volatile organic compounds (VOCs) pollution is a serious threat to people’s health and toluene is a typical representative. In this study, we developed a composite photocatalyst of carbon nitride quantum dots (CNQDs) in situ-doped TiO2 inverse opal TiO2 IO for efficient degradation of toluene. The catalyst was fabricated using a sol-gel method with colloidal photonic crystals as the template. The as-prepared catalyst exhibited excellent photocatalytic performance for degradation of toluene. After 6 h of simulated sunlight irradiation, 93% of toluene can be converted into non-toxic products CO2 and H2O, while only 37% of toluene is degraded over commercial P25 in the same condition. This greatly enhanced photocatalytic activity results from two aspects: (i) the inverse opal structure enhances the light harvesting while providing adequate surface area for effective oxidation reactions; (ii) the incorporation of CNQDs in the framework of TiO2 increases visible light absorption and promotes the separation of photo-generated charges. Collectively, highly efficient photocatalytic degradation of toluene has been achieved. In addition, it can be expanded to efficient degradation of organic pollutants in liquid phase such as phenol and Rhodamine B. This study provides a green, energy saving solution for indoor toxic VOCs removal as well as for the treatment of organic wastewater.

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Photonic Plasticines with Uniform Structural Colors, High Processability, and Self‐Healing Properties

Small ◽

10.1002/smll.202007426 ◽

2021 ◽

Vol 17 (8) ◽

pp. 2007426

Author(s):

Jing Zhang ◽

Jingjing Zhang ◽

Yangteng Ou ◽

Yipeng Qin ◽

Huilin Wen ◽

...

Keyword(s):

Self Healing ◽

Structural Colors

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Combination of Self-Healing Butyl Rubber and Natural Rubber Composites for Improving the Stability

Polymers ◽

10.3390/polym13030443 ◽

2021 ◽

Vol 13 (3) ◽

pp. 443

Author(s):

Kunakorn Chumnum ◽

Ekwipoo Kalkornsurapranee ◽

Jobish Johns ◽

Karnda Sengloyluan ◽

Yeampon Nakaramontri

Keyword(s):

Natural Rubber ◽

Dynamic Mechanical Properties ◽

Attenuated Total Reflection ◽

Rubber Matrix ◽

Self Healing ◽

Mechanical And Electrical Properties ◽

Natural Rubber Composites ◽

Tan Δ ◽

The Stability ◽

Physical And Chemical

The self-healing composites were prepared from the combination of bromobutyl rubber (BIIR) and natural rubber (NR) blends filled with carbon nanotubes (CNT) and carbon black (CB). To reach the optimized self-healing propagation, the BIIR was modified with ionic liquid (IL) and butylimidazole (IM), and blended with NR using the ratios of 70:30 and 80:20 BIIR:NR. Physical and chemical modifications were confirmed from the mixing torque and attenuated total reflection-fourier transform infrared spectroscopy (ATR-FTIR). It was found that the BIIR/NR-CNTCB with IL and IM effectively improved the cure properties with enhanced tensile properties relative to pure BIIR/NR blends. For the healed composites, BIIR/NR-CNTCB-IM exhibited superior mechanical and electrical properties due to the existing ionic linkages in rubber matrix. For the abrasion resistances, puncture stress and electrical recyclability were examined to know the possibility of inner liner applications and Taber abrasion with dynamic mechanical properties were elucidated for tire tread applications. Based on the obtained Tg and Tan δ values, the composites are proposed for tire applications in the future with a simplified preparation procedure.

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