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Polyacrylic Acid-Functionalized Graphene@Ca(OH)₂ Nanocomposites for Mural Protection.

ABSTRACT: Murals are one of the precious legacies of our ancestors; however, they face severe damage along with archeological discoveries, which need urgent repair. Nowadays, nanotechnology provides new concepts and materials for the consolidation and protection of murals. In this work, an innovative method for the protection of murals was proposed with graphene-based nanomaterials through strategically synthesizing a polyacrylic acid-functionalized graphene/nano-Ca(OH)₂ material (PAAG@Ca(OH)₂) by a facile and economic aqueous method. As a result, the nanocomposite PAAG@Ca(OH)₂ was demonstrated with high porosity, strong adsorption, appropriate hydrophilicity, and better permeability compared to the commercial AC33 sample according to the simulated tests. As expected, the nanocomposite PAAG@Ca(OH)₂ displayed a promising application for the reinforcement of murals, which opens up a new avenue for the protection of murals.

SUBMITTER: Gu W

PROVIDER: S-EPMC9016820 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature

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Polyacrylic Acid-Functionalized Graphene@Ca(OH)<sub>2</sub> Nanocomposites for Mural Protection.

Gu Wenting W Wei Yanfei Y Liu Bingbing B Hu Liuyong L Zhong Lei L Chen Guoke G

ACS omega 20220403 14

Murals are one of the precious legacies of our ancestors; however, they face severe damage along with archeological discoveries, which need urgent repair. Nowadays, nanotechnology provides new concepts and materials for the consolidation and protection of murals. In this work, an innovative method for the protection of murals was proposed with graphene-based nanomaterials through strategically synthesizing a polyacrylic acid-functionalized graphene/nano-Ca(OH)<sub>2</sub> material (PAAG@Ca(OH)<s ...[more]

PMID: 35449969

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Project description:Zinc germanate doped with Mn2+ (Zn2GeO4:Mn2+) is known to be a persistent luminescence green phosphor with potential applications in biosensing and bioimaging. Such applications demand nanoparticulated phosphors with a uniform shape and size, good dispersibility in aqueous media, high chemical stability, and surface-functionalization. These characteristics could be major bottlenecks and hence limit their practical applications. This work describes a one-pot, microwave-assisted hydrothermal method to synthesize highly uniform Zn2GeO4:Mn2+ nanoparticles (NPs) using polyacrylic acid (PAA) as an additive. A thorough characterization of the NPs showed that the PAA molecules were essential to realizing uniform NPs as they were responsible for the ordered aggregation of their building blocks. In addition, PAA remained attached to the NPs surface, which conferred high colloidal stability to the NPs through electrostatic and steric interactions, and provided carboxylate groups that can act as anchor sites for the eventual conjugation of biomolecules to the surface. In addition, it was demonstrated that the as-synthesized NPs were chemically stable for, at least, 1 week in phosphate buffer saline (pH range = 6.0-7.4). The luminescence properties of Zn2GeO4 NPs doped with different contents of Mn2+ (0.25-3.00 mol %) were evaluated to find the optimum doping level for the highest photoluminescence (2.50% Mn) and the longest persistent luminescence (0.50% Mn). The NPs with the best persistent luminescence properties were photostable for at least 1 week. Finally, taking advantage of such properties and the presence of surface carboxylate groups, the Zn2GeO4:0.50%Mn2+ sample was successfully used to develop a persistent luminescence-based sandwich immunoassay for the autofluorescence-free detection of interleukin-6 in undiluted human serum and undiluted human plasma samples. This study demonstrates that our persistent Mn-doped Zn2GeO4 nanophosphors are ideal candidates for biosensing applications.

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Polyacrylic Acid-Functionalized Graphene@Ca(OH)₂ Nanocomposites for Mural Protection.

Publications

Polyacrylic Acid-Functionalized Graphene@Ca(OH)<sub>2</sub> Nanocomposites for Mural Protection.

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Polyacrylic Acid-Functionalized Graphene@Ca(OH)2 Nanocomposites for Mural Protection.

Publications

Polyacrylic Acid-Functionalized Graphene@Ca(OH)<sub>2</sub> Nanocomposites for Mural Protection.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

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Polyacrylic Acid-Functionalized Graphene@Ca(OH)₂ Nanocomposites for Mural Protection.