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Simulated and Experimental Investigation of the Mechanical Properties and Solubility of 3D-Printed Capsules for Self-Healing Cement Composites

In the concrete industry, various R&D efforts have been devoted to self-healing technology, which can maintain the long-term performance of concrete structures, which is important in terms of sustainable development. Cracks in cement composites occur and propagate because of various internal and...

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Autores principales: Choi, Se-Jin, Kim, Ji-Hwan, Jeong, Hyojin, Lee, Ja-Sung, Lim, Tae-Uk, Ko, Haye Min, Kim, Sung Hoon, Jung, Wonsuk
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8401703/
https://www.ncbi.nlm.nih.gov/pubmed/34443101
http://dx.doi.org/10.3390/ma14164578
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author Choi, Se-Jin
Kim, Ji-Hwan
Jeong, Hyojin
Lee, Ja-Sung
Lim, Tae-Uk
Ko, Haye Min
Kim, Sung Hoon
Jung, Wonsuk
author_facet Choi, Se-Jin
Kim, Ji-Hwan
Jeong, Hyojin
Lee, Ja-Sung
Lim, Tae-Uk
Ko, Haye Min
Kim, Sung Hoon
Jung, Wonsuk
author_sort Choi, Se-Jin
collection PubMed
description In the concrete industry, various R&D efforts have been devoted to self-healing technology, which can maintain the long-term performance of concrete structures, which is important in terms of sustainable development. Cracks in cement composites occur and propagate because of various internal and external factors, reducing the composite’s stability. Interest in “self-healing” materials that can repair cracks has led researchers to embed self-healing capsules in cement composites. Overcoming the limitations of polymer capsules produced by chemical manufacturing methods, three-dimensional (3D) printing can produce capsules quickly and accurately and offers advantages such as high material strength, low cost, and the ability to fabricate capsules with complex geometries. We performed structural analysis simulations, experimentally evaluated the mechanical properties and solubility of poly(lactic acid) (PLA) capsules, and examined the effect of the capsule wall thickness and printing direction on cement composites embedded with these capsules. Thicker capsules withstood larger bursting loads, and the capsule rupture characteristics varied with the printing angle. Thus, the capsule design parameters must be optimized for different environments. Although the embedded capsules slightly reduced the compressive strength of the cement composites, the benefit of the encapsulated self-healing agent is expected to overcome this disadvantage.
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spelling pubmed-84017032021-08-29 Simulated and Experimental Investigation of the Mechanical Properties and Solubility of 3D-Printed Capsules for Self-Healing Cement Composites Choi, Se-Jin Kim, Ji-Hwan Jeong, Hyojin Lee, Ja-Sung Lim, Tae-Uk Ko, Haye Min Kim, Sung Hoon Jung, Wonsuk Materials (Basel) Article In the concrete industry, various R&D efforts have been devoted to self-healing technology, which can maintain the long-term performance of concrete structures, which is important in terms of sustainable development. Cracks in cement composites occur and propagate because of various internal and external factors, reducing the composite’s stability. Interest in “self-healing” materials that can repair cracks has led researchers to embed self-healing capsules in cement composites. Overcoming the limitations of polymer capsules produced by chemical manufacturing methods, three-dimensional (3D) printing can produce capsules quickly and accurately and offers advantages such as high material strength, low cost, and the ability to fabricate capsules with complex geometries. We performed structural analysis simulations, experimentally evaluated the mechanical properties and solubility of poly(lactic acid) (PLA) capsules, and examined the effect of the capsule wall thickness and printing direction on cement composites embedded with these capsules. Thicker capsules withstood larger bursting loads, and the capsule rupture characteristics varied with the printing angle. Thus, the capsule design parameters must be optimized for different environments. Although the embedded capsules slightly reduced the compressive strength of the cement composites, the benefit of the encapsulated self-healing agent is expected to overcome this disadvantage. MDPI 2021-08-15 /pmc/articles/PMC8401703/ /pubmed/34443101 http://dx.doi.org/10.3390/ma14164578 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Choi, Se-Jin
Kim, Ji-Hwan
Jeong, Hyojin
Lee, Ja-Sung
Lim, Tae-Uk
Ko, Haye Min
Kim, Sung Hoon
Jung, Wonsuk
Simulated and Experimental Investigation of the Mechanical Properties and Solubility of 3D-Printed Capsules for Self-Healing Cement Composites
title Simulated and Experimental Investigation of the Mechanical Properties and Solubility of 3D-Printed Capsules for Self-Healing Cement Composites
title_full Simulated and Experimental Investigation of the Mechanical Properties and Solubility of 3D-Printed Capsules for Self-Healing Cement Composites
title_fullStr Simulated and Experimental Investigation of the Mechanical Properties and Solubility of 3D-Printed Capsules for Self-Healing Cement Composites
title_full_unstemmed Simulated and Experimental Investigation of the Mechanical Properties and Solubility of 3D-Printed Capsules for Self-Healing Cement Composites
title_short Simulated and Experimental Investigation of the Mechanical Properties and Solubility of 3D-Printed Capsules for Self-Healing Cement Composites
title_sort simulated and experimental investigation of the mechanical properties and solubility of 3d-printed capsules for self-healing cement composites
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8401703/
https://www.ncbi.nlm.nih.gov/pubmed/34443101
http://dx.doi.org/10.3390/ma14164578
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