Academic Journal
Experimental Investigation of a Novel Formulation of a Cyanoacrylate-Based Adhesive for Self-Healing Concrete Technologies
| العنوان: | Experimental Investigation of a Novel Formulation of a Cyanoacrylate-Based Adhesive for Self-Healing Concrete Technologies |
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| المؤلفون: | De Nardi C., Gardner D., Cazzador G., Cristofori D., Ronchin L., Vavasori A., Jefferson T. |
| المساهمون: | De Nardi, C., Gardner, D., Cazzador, G., Cristofori, D., Ronchin, L., Vavasori, A., Jefferson, T. |
| سنة النشر: | 2021 |
| المجموعة: | Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) |
| مصطلحات موضوعية: | 3D printing, cyanoacrylate adhesive, healing agent, self-healing concrete, vascular and mini-vascular networks, Settore CHIM/04 - Chimica Industriale, Settore CHIM/05 - Scienza e Tecnologia dei Materiali Polimerici, Settore CHIM/07 - Fondamenti Chimici delle Tecnologie |
| الوصف: | The selection of an appropriate healing agent is critical to the success of vascular and mini-vascular networks. In self-healing concrete technology, commercially available cyanoacrylate (CA) adhesives have been shown to produce good strength recoveries; however, their rapid curing rate and short shelf-life make them unsuitable for site application. The aim of this study was to develop a modified cyanoacrylate (n-CA) with an extended shelf-life suitable for incorporation in a self-healing system. A series of n-CAs were formed from a commercial Ethyl Cyanoacrylate adhesive mixed with acrylic acid (AA) and nitro-anthraquinone (nAq) in varying ratios. When encapsulated within 3D printed mini-vascular networks (MVNs), the n-CAs remained dormant in liquid form for up to 5days. The contact angle between the n-CAs and the cement mortar substrate, as measured via the sessile drop technique, decreased significantly with increasing AA content. The mechanical properties (bond strength) and the polymerization hardening of the n-CAs were evaluated over a curing period of 7–21days, via a series of pull-off tests using cement mortar cubes. The 4:1:02 (CA:AA:nAq) n-CA formulation showed a significant increase in bond strength from 14 to 21days, with a ceiling value of 2.6MPa, while the 2:1 (CA:AA) n-CA formulation exhibited a good bond strength after 21days (1MPa). Nuclear Magnetic Resonance (NMR) conducted on the n-CAs suggested the formation of several new polymeric species, whilst differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) on the pre- and post-printed MVN material confirmed no significant changes in chemistry with no evidence of polymer degradation. Considered together, the experimental results show the potential for different n-CA formulations to act efficiently as a healing agent. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | ELETTRONICO |
| اللغة: | English |
| Relation: | info:eu-repo/semantics/altIdentifier/wos/WOS:000664318900001; volume:7; numberofpages:15; journal:FRONTIERS IN BUILT ENVIRONMENT; https://hdl.handle.net/10278/3745390; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85108366525 |
| DOI: | 10.3389/fbuil.2021.660562 |
| الاتاحة: | https://hdl.handle.net/10278/3745390 https://doi.org/10.3389/fbuil.2021.660562 |
| Rights: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.C95C86AF |
| قاعدة البيانات: | BASE |
| DOI: | 10.3389/fbuil.2021.660562 |
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