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Structure andProperties ofNanocomposites Formedby the Occlusion ofBlock Copolymer Wormsand Vesicles WithinCalcite Crystals Yi‐Yeoun KimMona SemsarilarJoseph D. Carloni2016 год

Structure and Properties of Nanocomposites Formed by the Occlusion of Block Copolymer Worms and Vesicles Within Calcite Crystals
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Аннотация: This article describes an experimentally versatile strategy for producing inorganic/organic nanocomposites, with control over the microstructure at the nano‐ and mesoscales. Taking inspiration from biominerals, CaCO 3 is coprecipitated with anionic diblock copolymer worms or vesicles to produce single crystals of calcite occluding a high density of the organic component. This approach can also be extended to generate complex structures in which the crystals are internally patterned with nano‐objects of differing morphologies. Extensive characterization of the nanocomposite crystals using high resolution synchrotron powder X‐ray diffraction and vibrational spectroscopy demonstrates how the occlusions affect the short and long‐range order of the crystal lattice. By comparison with nanocomposite crystals containing latex particles and copolymer micelles, it is shown that the effect of these occlusions on the crystal lattice is dominated by the interface between the inorganic crystal and the organic nano‐objects, rather than the occlusion size. This is supported by in situ atomic force microscopy studies of worm occlusion in calcite, which reveal flattening of the copolymer worms on the crystal surface, followed by burial and void formation. Finally, the mechanical properties of the nanocomposite crystals are determined using nanoindentation techniques, which reveal that they have hardnesses approaching those of biogenic calcites.
Год издания: 2016
Авторы: Yi‐Yeoun Kim, Mona Semsarilar, Joseph D. Carloni, Kang Rae Cho, Alexander N. Kulak, Iryna Polishchuk, Coit T. Hendley, Paul J. M. Smeets, Lee A. Fielding, Boaz Pokroy, Chiu C. Tang, Lara A. Estroff, Shefford P. Baker, Steven P. Armes, Fiona C. Meldrum
Издательство: Wiley
Источник: Advanced Functional Materials
Ключевые слова: Calcium Carbonate Crystallization and Inhibition, Pickering emulsions and particle stabilization, Enhanced Oil Recovery Techniques
Другие ссылки: Advanced Functional Materials (PDF)
Advanced Functional Materials (HTML)
HAL (Le Centre pour la Communication Scientifique Directe) (PDF)
HAL (Le Centre pour la Communication Scientifique Directe) (HTML)
HAL (Le Centre pour la Communication Scientifique Directe) (HTML)
White Rose Research Online (University of Leeds) (HTML)
White Rose Research Online (University of Leeds) (HTML)