Sodium silicate/polyurethane microcapsules synthesized for enhancing self-healing ability of cementitious materials: Optimization of stirring speeds and evaluation of self-healing efficiency

Ahsanollah Beglarigale; Doğa  Eyice; Yoldaş  Seki; Çağlar Yalçinkaya; Oguzhan Copuroglu; Halit Yazici

doi:10.1016/j.jobe.2021.102279

Sodium silicate/polyurethane microcapsules synthesized for enhancing self-healing ability of cementitious materials: Optimization of stirring speeds and evaluation of self-healing efficiency

Ahsanollah Beglarigale, Doğa Eyice, Yoldaş Seki, Çağlar Yalçinkaya, Oguzhan Copuroglu, Halit Yazici

Materials and Environment

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Abstract

In this study, stirring speeds during the synthesizing process of the sodium silicate/polyurethane microcapsules were optimized. The yield values of microcapsules at different stirring rates were evaluated. Based on the yield values and shape of microcapsules, optimized microcapsules were obtained. The measurements of the shell thickness of microcapsules were performed on the fractured microcapsules by using scanning electron microscopy. The optimized microcapsules were further characterized by means of optical microscopy and nanoindentation. Load vs. displacement and modulus of elasticity vs. displacement characteristics of the microcapsules were obtained. The average modulus of elasticity was found to be 633 MPa. The self-healing efficiency of the optimized microcapsules was evaluated by means of compressive strength tests. The incorporation of microcapsules reduced the compressive strength of fiber-reinforced mortar by 12–22%. However, it was observed that the microcapsules enhanced the self-healing capacity (recovery in compressive strength) of the mortar.

Original language	English
Article number	102279
Pages (from-to)	1-10
Number of pages	10
Journal	Journal of Building Engineering
Volume	39
DOIs	https://doi.org/10.1016/j.jobe.2021.102279
Publication status	Published - 2021

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care

Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

Cementitious materials
Microencapsulation
Self-healing
Sodium silicate

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10.1016/j.jobe.2021.102279

1-s2.0-S2352710221001352-mainFinal published version, 9.79 MB

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Beglarigale, A., Eyice, D., Seki, Y., Yalçinkaya, Ç., Copuroglu, O., & Yazici, H. (2021). Sodium silicate/polyurethane microcapsules synthesized for enhancing self-healing ability of cementitious materials: Optimization of stirring speeds and evaluation of self-healing efficiency. Journal of Building Engineering, 39, 1-10. Article 102279. https://doi.org/10.1016/j.jobe.2021.102279

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title = "Sodium silicate/polyurethane microcapsules synthesized for enhancing self-healing ability of cementitious materials: Optimization of stirring speeds and evaluation of self-healing efficiency",

abstract = "In this study, stirring speeds during the synthesizing process of the sodium silicate/polyurethane microcapsules were optimized. The yield values of microcapsules at different stirring rates were evaluated. Based on the yield values and shape of microcapsules, optimized microcapsules were obtained. The measurements of the shell thickness of microcapsules were performed on the fractured microcapsules by using scanning electron microscopy. The optimized microcapsules were further characterized by means of optical microscopy and nanoindentation. Load vs. displacement and modulus of elasticity vs. displacement characteristics of the microcapsules were obtained. The average modulus of elasticity was found to be 633 MPa. The self-healing efficiency of the optimized microcapsules was evaluated by means of compressive strength tests. The incorporation of microcapsules reduced the compressive strength of fiber-reinforced mortar by 12–22%. However, it was observed that the microcapsules enhanced the self-healing capacity (recovery in compressive strength) of the mortar.",

keywords = "Cementitious materials, Microencapsulation, Self-healing, Sodium silicate",

author = "Ahsanollah Beglarigale and Doğa Eyice and Yolda{\c s} Seki and {\c C}ağlar Yal{\c c}inkaya and Oguzhan Copuroglu and Halit Yazici",

note = "Green Open Access added to TU Delft Institutional Repository {\textquoteleft}You share, we take care!{\textquoteright} – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.",

year = "2021",

doi = "10.1016/j.jobe.2021.102279",

language = "English",

volume = "39",

pages = "1--10",

journal = "Journal of Building Engineering",

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Beglarigale, A, Eyice, D, Seki, Y, Yalçinkaya, Ç, Copuroglu, O & Yazici, H 2021, 'Sodium silicate/polyurethane microcapsules synthesized for enhancing self-healing ability of cementitious materials: Optimization of stirring speeds and evaluation of self-healing efficiency', Journal of Building Engineering, vol. 39, 102279, pp. 1-10. https://doi.org/10.1016/j.jobe.2021.102279

Sodium silicate/polyurethane microcapsules synthesized for enhancing self-healing ability of cementitious materials: Optimization of stirring speeds and evaluation of self-healing efficiency. / Beglarigale, Ahsanollah; Eyice, Doğa ; Seki, Yoldaş et al.
In: Journal of Building Engineering, Vol. 39, 102279, 2021, p. 1-10.

Research output: Contribution to journal › Article › Scientific › peer-review

TY - JOUR

T1 - Sodium silicate/polyurethane microcapsules synthesized for enhancing self-healing ability of cementitious materials

T2 - Optimization of stirring speeds and evaluation of self-healing efficiency

AU - Beglarigale, Ahsanollah

AU - Eyice, Doğa

AU - Seki, Yoldaş

AU - Yalçinkaya, Çağlar

AU - Copuroglu, Oguzhan

AU - Yazici, Halit

N1 - Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

PY - 2021

Y1 - 2021

N2 - In this study, stirring speeds during the synthesizing process of the sodium silicate/polyurethane microcapsules were optimized. The yield values of microcapsules at different stirring rates were evaluated. Based on the yield values and shape of microcapsules, optimized microcapsules were obtained. The measurements of the shell thickness of microcapsules were performed on the fractured microcapsules by using scanning electron microscopy. The optimized microcapsules were further characterized by means of optical microscopy and nanoindentation. Load vs. displacement and modulus of elasticity vs. displacement characteristics of the microcapsules were obtained. The average modulus of elasticity was found to be 633 MPa. The self-healing efficiency of the optimized microcapsules was evaluated by means of compressive strength tests. The incorporation of microcapsules reduced the compressive strength of fiber-reinforced mortar by 12–22%. However, it was observed that the microcapsules enhanced the self-healing capacity (recovery in compressive strength) of the mortar.

AB - In this study, stirring speeds during the synthesizing process of the sodium silicate/polyurethane microcapsules were optimized. The yield values of microcapsules at different stirring rates were evaluated. Based on the yield values and shape of microcapsules, optimized microcapsules were obtained. The measurements of the shell thickness of microcapsules were performed on the fractured microcapsules by using scanning electron microscopy. The optimized microcapsules were further characterized by means of optical microscopy and nanoindentation. Load vs. displacement and modulus of elasticity vs. displacement characteristics of the microcapsules were obtained. The average modulus of elasticity was found to be 633 MPa. The self-healing efficiency of the optimized microcapsules was evaluated by means of compressive strength tests. The incorporation of microcapsules reduced the compressive strength of fiber-reinforced mortar by 12–22%. However, it was observed that the microcapsules enhanced the self-healing capacity (recovery in compressive strength) of the mortar.

KW - Cementitious materials

KW - Microencapsulation

KW - Self-healing

KW - Sodium silicate

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U2 - 10.1016/j.jobe.2021.102279

DO - 10.1016/j.jobe.2021.102279

M3 - Article

AN - SCOPUS:85101416619

SN - 2352-7102

VL - 39

SP - 1

EP - 10

JO - Journal of Building Engineering

JF - Journal of Building Engineering

M1 - 102279

ER -

Sodium silicate/polyurethane microcapsules synthesized for enhancing self-healing ability of cementitious materials: Optimization of stirring speeds and evaluation of self-healing efficiency

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