Core‐Shell System Based on Gelatin and Poly(Vinyl Alcohol) (PVA) for Concrete Self‐Healing Applications: Synthesis, Characterization, and Optimization. Issue 1 (23rd August 2021)

• Record Type: Journal Article
• Authors: da Costa, Vítor Corrêa; Junior, Fernando Gomes de Souza; Sousa, Luana de Castro; Pal, Kaushik; Filho, Romildo Dias Tolêdo
• Editors: Thomas, Sabu; Zachariah, Suji Mary
• Is Part Of: Macromolecular symposia. Volume 398:Issue 1(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-08-23
• Subjects: composite -- concrete -- gelatin -- poly(vinyl alcohol) -- self‐healing; Macromolecules -- Congresses; Polymers -- Congresses; Polymerization -- Congresses; Macromolecules -- Periodicals; Polymers -- Periodicals; Polymerization -- Periodicals; 547.705
• DOI: 10.1002/masy.202000194
• Languages: English
• ISSNs: 1022-1360

Abstract

Abstract: Insofar the cost of repairing concrete structures reaches the trillions of dollars, new technologies, such as concrete self‐healing, are investigated continuously. Consequently, the main objective of this work is on the production of a cheap and easy‐to‐make material, which can be used in large‐scale applications, besides presenting similar results as other ones more complex systems. In brief, a core‐shell system is produced and investigated as a self‐healing agent. Aiming this, a mix of gelatin and sodium silicate (Na2 SiO3 ) is used as the core, while poly(vinyl alcohol) (PVA) is the glutaraldehyde crosslinked shell. The obtained materials are characterized using several techniques, such as Fourier transform infrared spectroscopy (FTIR), as well as, thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). FTIR proves the obtaining of the proposed system. In turn, TGA and DSC showed that the material could endure real‐life applications. Also, granulometry tests show that the obtained materials are mostly in the micrometric scale. The Na2 SiO3 release is especially tested in aqueous media, proving the core‐shell system swells, releasing its active agent. Thereby, the obtained results allow concluding that the presented core‐shell material is useful to the self‐healing applications.