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A platform for research: civil engineering, architecture and urbanism
Fabrication and characterization of self-healing microcapsules containing bituminous rejuvenator by a nano-inorganic/organic hybrid method
Graphical abstract ESEM morphologies of microcapsules with 10% nano-CaCO3 composite shells. Display Omitted
Highlights Self-healing microcapsules containing rejuvenator were fabricated with nano-inorganic/organic hybrid shells. The mechanical and thermal properties of these microcapsules had been improved. The nano-particles on microcapsules decreased the deformation possibility of shells.
Abstract The aging problem of bitumen leads to pavement failure after years of usage. Microcapsules containing rejuvenator is a promising chemical product applied to improve the self-healing ability of bitumen. The aim of this work was to fabricate and characterize the self-healing microcapsules containing bituminous rejuvenator with nano-inorganic/organic hybrid shells. The shell had a two-layer structure: the inside layer material was the cross-linked methanol modified melamine-formaldehyde (MMF) resin and the outside materials was composed of methanol modified MMF resin and nano-particles of calcium carbonate (nano-CaCO3). The forming mechanism of the two-layer structure was described based on a twice-condensation process. Fourier transform infrared spectroscopy (FT-IR) and Energy Dispersive Spectroscopy (EDS) results confirmed the nano-inorganic/organic hybrid structure of shells. The ideal content of nano-CaCO3 particles was optimized through the morphologies observation. The addition of nano-CaCO3 particles did not greatly influence the mean size of microcapsules. On the contrary, the nano-CaCO3 particles increased the shell thickness of microcapsules owing to the loosely composite structure of shells. Thermal stability tests showed that the microcapsules could survive in the bitumen with a temperature of 200°C. Moreover, the microcapsules could resist a violent temperature change process without destruction attributing to the protection of nano-CaCO3 particles. The nano-particles on microcapsules decreased the deformation possibility of shells tested by nanoindentation.
Fabrication and characterization of self-healing microcapsules containing bituminous rejuvenator by a nano-inorganic/organic hybrid method
Graphical abstract ESEM morphologies of microcapsules with 10% nano-CaCO3 composite shells. Display Omitted
Highlights Self-healing microcapsules containing rejuvenator were fabricated with nano-inorganic/organic hybrid shells. The mechanical and thermal properties of these microcapsules had been improved. The nano-particles on microcapsules decreased the deformation possibility of shells.
Abstract The aging problem of bitumen leads to pavement failure after years of usage. Microcapsules containing rejuvenator is a promising chemical product applied to improve the self-healing ability of bitumen. The aim of this work was to fabricate and characterize the self-healing microcapsules containing bituminous rejuvenator with nano-inorganic/organic hybrid shells. The shell had a two-layer structure: the inside layer material was the cross-linked methanol modified melamine-formaldehyde (MMF) resin and the outside materials was composed of methanol modified MMF resin and nano-particles of calcium carbonate (nano-CaCO3). The forming mechanism of the two-layer structure was described based on a twice-condensation process. Fourier transform infrared spectroscopy (FT-IR) and Energy Dispersive Spectroscopy (EDS) results confirmed the nano-inorganic/organic hybrid structure of shells. The ideal content of nano-CaCO3 particles was optimized through the morphologies observation. The addition of nano-CaCO3 particles did not greatly influence the mean size of microcapsules. On the contrary, the nano-CaCO3 particles increased the shell thickness of microcapsules owing to the loosely composite structure of shells. Thermal stability tests showed that the microcapsules could survive in the bitumen with a temperature of 200°C. Moreover, the microcapsules could resist a violent temperature change process without destruction attributing to the protection of nano-CaCO3 particles. The nano-particles on microcapsules decreased the deformation possibility of shells tested by nanoindentation.
Fabrication and characterization of self-healing microcapsules containing bituminous rejuvenator by a nano-inorganic/organic hybrid method
Wang, Ying-Yuan (author) / Su, Jun-Feng (author) / Schlangen, Erik (author) / Han, Ning-Xu (author) / Han, Shan (author) / Li, Wei (author)
Construction and Building Materials ; 121 ; 471-482
2016-06-10
12 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2016
| British Library Online Contents | 2016
| British Library Online Contents | 2016