Cargando…
Assessment of Functional Performance, Self-Healing Properties and Degradation Resistance of Poly-Lactic Acid and Polyhydroxyalkanoates Composites
In this study, the applicability of two bacteria-based healing agents (e.g., poly-lactic acid and polyhydroxyalkanoate) in blast furnace slag cement (BFSC) mortar has been assessed. An experimental campaign on the functional properties, self-healing capacity, freezing–thawing and carbonation resista...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8912335/ https://www.ncbi.nlm.nih.gov/pubmed/35267748 http://dx.doi.org/10.3390/polym14050926 |
_version_ | 1784667095988961280 |
---|---|
author | Rossi, Emanuele Raghavan, Arjun Copuroglu, Oguzhan Jonkers, Henk M. |
author_facet | Rossi, Emanuele Raghavan, Arjun Copuroglu, Oguzhan Jonkers, Henk M. |
author_sort | Rossi, Emanuele |
collection | PubMed |
description | In this study, the applicability of two bacteria-based healing agents (e.g., poly-lactic acid and polyhydroxyalkanoate) in blast furnace slag cement (BFSC) mortar has been assessed. An experimental campaign on the functional properties, self-healing capacity, freezing–thawing and carbonation resistance has been conducted in comparison with plain mortar (Ctrl). Due to the relatively low alkalinity of the mixture, the addition of poly-lactic acid healing agents (PLA) caused coarsening of the micro-structure, decrease of strength and did not improve the self-healing capacity of the material. Among other consequences, the mass loss due to the freezing–thawing of PLA specimens was about 5% higher than that of the Ctrl specimens. On the contrary, no detrimental effect of the mortar functional properties was measured when polyhydroxyalkanoate healing agents (AKD) were added. The self-healing capacity of AKD specimens was higher than that of the Ctrl specimens, reaching a maximum healed crack width of 559 µm after 168 days of self-healing, while it was 439 µm for the Ctrl specimens and 385 µm for PLA specimens. The air void content of the AKD mixture was 0.9% higher than that of the Ctrl, increasing its resistance against freezing–thawing cycles. This study aims to confirm the potential applicability of AKD particles as self-healing agents in low-alkaline cementitious mixtures. |
format | Online Article Text |
id | pubmed-8912335 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-89123352022-03-11 Assessment of Functional Performance, Self-Healing Properties and Degradation Resistance of Poly-Lactic Acid and Polyhydroxyalkanoates Composites Rossi, Emanuele Raghavan, Arjun Copuroglu, Oguzhan Jonkers, Henk M. Polymers (Basel) Article In this study, the applicability of two bacteria-based healing agents (e.g., poly-lactic acid and polyhydroxyalkanoate) in blast furnace slag cement (BFSC) mortar has been assessed. An experimental campaign on the functional properties, self-healing capacity, freezing–thawing and carbonation resistance has been conducted in comparison with plain mortar (Ctrl). Due to the relatively low alkalinity of the mixture, the addition of poly-lactic acid healing agents (PLA) caused coarsening of the micro-structure, decrease of strength and did not improve the self-healing capacity of the material. Among other consequences, the mass loss due to the freezing–thawing of PLA specimens was about 5% higher than that of the Ctrl specimens. On the contrary, no detrimental effect of the mortar functional properties was measured when polyhydroxyalkanoate healing agents (AKD) were added. The self-healing capacity of AKD specimens was higher than that of the Ctrl specimens, reaching a maximum healed crack width of 559 µm after 168 days of self-healing, while it was 439 µm for the Ctrl specimens and 385 µm for PLA specimens. The air void content of the AKD mixture was 0.9% higher than that of the Ctrl, increasing its resistance against freezing–thawing cycles. This study aims to confirm the potential applicability of AKD particles as self-healing agents in low-alkaline cementitious mixtures. MDPI 2022-02-25 /pmc/articles/PMC8912335/ /pubmed/35267748 http://dx.doi.org/10.3390/polym14050926 Text en © 2022 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 Rossi, Emanuele Raghavan, Arjun Copuroglu, Oguzhan Jonkers, Henk M. Assessment of Functional Performance, Self-Healing Properties and Degradation Resistance of Poly-Lactic Acid and Polyhydroxyalkanoates Composites |
title | Assessment of Functional Performance, Self-Healing Properties and Degradation Resistance of Poly-Lactic Acid and Polyhydroxyalkanoates Composites |
title_full | Assessment of Functional Performance, Self-Healing Properties and Degradation Resistance of Poly-Lactic Acid and Polyhydroxyalkanoates Composites |
title_fullStr | Assessment of Functional Performance, Self-Healing Properties and Degradation Resistance of Poly-Lactic Acid and Polyhydroxyalkanoates Composites |
title_full_unstemmed | Assessment of Functional Performance, Self-Healing Properties and Degradation Resistance of Poly-Lactic Acid and Polyhydroxyalkanoates Composites |
title_short | Assessment of Functional Performance, Self-Healing Properties and Degradation Resistance of Poly-Lactic Acid and Polyhydroxyalkanoates Composites |
title_sort | assessment of functional performance, self-healing properties and degradation resistance of poly-lactic acid and polyhydroxyalkanoates composites |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8912335/ https://www.ncbi.nlm.nih.gov/pubmed/35267748 http://dx.doi.org/10.3390/polym14050926 |
work_keys_str_mv | AT rossiemanuele assessmentoffunctionalperformanceselfhealingpropertiesanddegradationresistanceofpolylacticacidandpolyhydroxyalkanoatescomposites AT raghavanarjun assessmentoffunctionalperformanceselfhealingpropertiesanddegradationresistanceofpolylacticacidandpolyhydroxyalkanoatescomposites AT copurogluoguzhan assessmentoffunctionalperformanceselfhealingpropertiesanddegradationresistanceofpolylacticacidandpolyhydroxyalkanoatescomposites AT jonkershenkm assessmentoffunctionalperformanceselfhealingpropertiesanddegradationresistanceofpolylacticacidandpolyhydroxyalkanoatescomposites |