Smart releasing behavior of a chemical self-healing microcapsule in the stimulated concrete pore solution

Dong, Biqin; Wang, Yanshuai; Fang, Guohao; Han, Ningxu; Xing, Feng; Lu, Youyuan

doi:10.1016/j.cemconcomp.2014.10.006

Cited by 144 publications

(52 citation statements)

References 13 publications

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“…This production technique has been used to produce microcapsules for construction oriented applications, mainly for the encapsulation of phase change materials [15]. More recently, spray drying was used for the production of pH sensitive microcapsules for self-healing concrete [9].…”

Section: Physical Methodsmentioning

confidence: 99%

“…The concept of pH sensitive microcapsules that release anticorrosive substances has expanded to construction materials. Recent studies report the production of pH sensitive microcapsules for use in concrete [9,10]. Another release mechanism is the gradual decomposition of light sensitive microcapsules, for a variety of wavelengths, with many applications in cosmetics and agricultural industries [11].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Polymeric microcapsules with switchable mechanical properties for self-healing concrete: synthesis, characterisation and proof of concept

Kanellopoulos

Palmer²,

Kerr³

et al. 2017

Smart Mater. Struct.

123

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Microcapsules, with sodium silicate solution as core, were produced using complex coacervation in a double, oil-in-water-in oil, emulsion system. The shell material was a gelatin-acacia gum crosslinked coacervate and the produced microcapsules had diameters ranging from 300 to 700 μm. The shell material designed with switchable mechanical properties. When it is hydrated exhibits soft and 'rubbery' behaviour and, when dried, transitions to a stiff and 'glassy' material. The microcapsules survived drying and rehydrating cycles and preserved their structural integrity when exposed to highly alkaline solutions that mimic the pH environment of concrete. Microscopy revealed that the shell thickness of the microcapsules varies across their perimeter from 5 to 20 μm. Thermal analysis showed that the produced microcapsules were very stable up to 190°C. Proof of concept investigation has demonstrated that the microcapsules successfully survive and function when exposed to a cement-based matrix. Observations showed that the microcapsules survive mixing with cement and rupture successfully upon crack formation releasing the encapsulated sodium silicate solution.

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Section: Physical Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Polymeric microcapsules with switchable mechanical properties for self-healing concrete: synthesis, characterisation and proof of concept

Kanellopoulos

Palmer²,

Kerr³

et al. 2017

Smart Mater. Struct.

123

View full text Add to dashboard Cite

show abstract

“…Inspired from that, the microcapsule-based self-healing concept has also shown its great application potential in extending the lifetime of cementitious materials [32]. Once the incorporated microcapsules are ruptured by the stimuli such as force [33], ions [34] pH [35] etc., the self-healing action is realized through the release and reaction of repairing chemicals in the region of crack.…”

Section: Microencapsulationmentioning

confidence: 99%

A Review: Novel Routes towards the Realization of Self-Healing Function in Cementitious Materials

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. Cementitious materials are the fundamental element in the field of civil construction. While due to its brittle nature, cracking of cementitious material at multi-scales could pose a threaten to the safety and durability of concrete structure. To solve this congenital problem, bio-mimic self-healing in cementitious materials was proposed and gradually demonstrated its great potential. In this review, two big categories of self-healing, autonomous and autogenous self-heaing, with its corresponding up-to-date healing stratergies were introduced. The merits and limits of different healing strategies were concluded. It is believed that this review could shed light to the realization of practical application self-healing concept in cementitious materials.

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“…Beberapa hasil riset dalam aspek ini telah dilaporkan dan secara umum bertujuan mencari alternatif paling efisien dalam mengaplikasikan formula bakteri yang digunakan. Pengalaman dalam aplikasi perlakuan hayati untuk pemulihan retak beton perlu dijadikan acuan di dalam memilih alternatif terbaik (Wang et al, 2012;Xu et al, 2014;Dong et al, 2015;DeKoster et al, 2015;. Para peneliti ini mengembangkan berbagai teknik aplikasi antara lain berupa tablet, granular, microkapsul, dan gel silika atau poliutiren.…”

unclassified

Perbaikan tanah melalui mediasi hayati [Bio-mediated soil improvement]

Goenadi¹

2017

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AbstrakSifat tanah yang tidak mampu memberikan dukungan fisika-mekanis yang diperlukan seringkali menjadi kendala dalam pemanfaatannya baik untuk pertanian maupun konstruksi. Cara-cara yang umum adalah dengan aplikasi bahan kimia yang tidak saja mahal, tetapi juga tidak ramah lingkungan. Oleh karena itu diperlukan teknologi baru, berkelanjutan, dan inovatif untuk memperbaiki sifat-sifat mekanis tanah. Beberapa penelitian telah memberikan peluang untuk memanfaatkan mikroba untuk tujuan ini, khususnya mikroba yang memiliki kemampuan untuk menghasilkan senyawa metabolit sekunder penguat struktur partikel tanah seperti enzim urease. Bakteri penghasil enzim ini mampu mendorong pembentukan mineral kalsit yang berfungsi sebagai perekat antar partikel tanah. Bagaimanapun juga, aplikasi teknologi ini secara langsung di lapangan menghadapi beberapa kendala, seperti interaksi tanah dan cairan ruang pori, bioaugmentasi vs biostimulan dari komunitas mikroba, penyebaran terkendali dari pengendapan kalsit yang dimediasi, dan sementasi permanen. Tulisan ini menyajikan secara singkat pengembangan teknologi perbaikan sifat fisik mekanis tanah melalui aplikasi mikroba untuk memenuhi persyaratan pekerjaan konstruksi.[Kata kunci : sifat fisika tanah, sifat mekanis, mikroba ureolitik, cairan ruang pori, pengendapan kalsit] PendahuluanKebutuhan infrastruktur sipil untuk pertanian dan non-pertanian membuka peluang untuk teknologi yang berkelanjutan yang memenuhi persyaratan sosial dengan pembiayaan yang efisien dan berdampak negatif rendah. Pengendalian dan modifikasi sifat-sifat tanah sangat penting untuk aplikasi geoteknik, geolingkungan, pertanian, dan yang lainnya. Praktek yang umum digunakan di bidang konstruksi adalah dengan menyuntikkan bahan sintetik ke dalam lapisan bawah permukaan melalui teknik pengisian celah dengan aliran bahan kimia untuk mengikat partikel tanah dan *) Penulis

show abstract

Smart releasing behavior of a chemical self-healing microcapsule in the stimulated concrete pore solution

Cited by 144 publications

References 13 publications

Polymeric microcapsules with switchable mechanical properties for self-healing concrete: synthesis, characterisation and proof of concept

Polymeric microcapsules with switchable mechanical properties for self-healing concrete: synthesis, characterisation and proof of concept

A Review: Novel Routes towards the Realization of Self-Healing Function in Cementitious Materials

Perbaikan tanah melalui mediasi hayati [Bio-mediated soil improvement]

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