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A platform for research: civil engineering, architecture and urbanism
Polydopamine and Chitosan as Bio-Inspired Adhesion Promoters in Fiber-Reinforced Cement Composites
https://orcid.org/http://orcid.org/0000-0002-9081-4002
https://orcid.org/http://orcid.org/0000-0001-9829-5238
https://orcid.org/http://orcid.org/0000-0002-0643-7524
https://orcid.org/http://orcid.org/0000-0002-8806-0408
https://orcid.org/http://orcid.org/0000-0001-6377-8336
https://orcid.org/http://orcid.org/0000-0003-4054-6414
https://orcid.org/http://orcid.org/0000-0002-4685-7064
A major issue in the development of more sustainable fiber-reinforced cementitious composites is the control of the fiber-matrix interaction. In this study, ultra-high molecular weight polyethylene microfibers are surface-modified using two bio-based materials, dopamine and chitosan. Both coatings add polar groups to the surface of the initially nonpolar and non-reactive fibers; the combination of dopamine with chitosan may improve the alkaline stability of the films. Confocal and atomic force microscopy (AFM) depict changes of the surface morphology; zeta potential measurements show variations of the chemical surface properties of the fibers after modification. Unmodified and modified fibers are embedded in a novel LC3 matrix; the interaction between fibers and concrete matrix is studied by single fiber pullout tests. The thin polydopamine film improves both the wettability and the interfacial shear stress and pullout energy of the fibers in the cement matrix. The combined dopamine + chitosan coating exhibits a slightly weaker fiber-matrix adhesion.
Polydopamine and Chitosan as Bio-Inspired Adhesion Promoters in Fiber-Reinforced Cement Composites
https://orcid.org/http://orcid.org/0000-0002-9081-4002
https://orcid.org/http://orcid.org/0000-0001-9829-5238
https://orcid.org/http://orcid.org/0000-0002-0643-7524
https://orcid.org/http://orcid.org/0000-0002-8806-0408
https://orcid.org/http://orcid.org/0000-0001-6377-8336
https://orcid.org/http://orcid.org/0000-0003-4054-6414
https://orcid.org/http://orcid.org/0000-0002-4685-7064
A major issue in the development of more sustainable fiber-reinforced cementitious composites is the control of the fiber-matrix interaction. In this study, ultra-high molecular weight polyethylene microfibers are surface-modified using two bio-based materials, dopamine and chitosan. Both coatings add polar groups to the surface of the initially nonpolar and non-reactive fibers; the combination of dopamine with chitosan may improve the alkaline stability of the films. Confocal and atomic force microscopy (AFM) depict changes of the surface morphology; zeta potential measurements show variations of the chemical surface properties of the fibers after modification. Unmodified and modified fibers are embedded in a novel LC3 matrix; the interaction between fibers and concrete matrix is studied by single fiber pullout tests. The thin polydopamine film improves both the wettability and the interfacial shear stress and pullout energy of the fibers in the cement matrix. The combined dopamine + chitosan coating exhibits a slightly weaker fiber-matrix adhesion.
Polydopamine and Chitosan as Bio-Inspired Adhesion Promoters in Fiber-Reinforced Cement Composites
https://orcid.org/http://orcid.org/0000-0002-9081-4002
https://orcid.org/http://orcid.org/0000-0001-9829-5238
https://orcid.org/http://orcid.org/0000-0002-0643-7524
https://orcid.org/http://orcid.org/0000-0002-8806-0408
https://orcid.org/http://orcid.org/0000-0001-6377-8336
https://orcid.org/http://orcid.org/0000-0003-4054-6414
https://orcid.org/http://orcid.org/0000-0002-4685-7064
A major issue in the development of more sustainable fiber-reinforced cementitious composites is the control of the fiber-matrix interaction. In this study, ultra-high molecular weight polyethylene microfibers are surface-modified using two bio-based materials, dopamine and chitosan. Both coatings add polar groups to the surface of the initially nonpolar and non-reactive fibers; the combination of dopamine with chitosan may improve the alkaline stability of the films. Confocal and atomic force microscopy (AFM) depict changes of the surface morphology; zeta potential measurements show variations of the chemical surface properties of the fibers after modification. Unmodified and modified fibers are embedded in a novel LC3 matrix; the interaction between fibers and concrete matrix is studied by single fiber pullout tests. The thin polydopamine film improves both the wettability and the interfacial shear stress and pullout energy of the fibers in the cement matrix. The combined dopamine + chitosan coating exhibits a slightly weaker fiber-matrix adhesion.
Polydopamine and Chitosan as Bio-Inspired Adhesion Promoters in Fiber-Reinforced Cement Composites
RILEM Bookseries
Mechtcherine, Viktor (editor) / Signorini, Cesare (editor) / Junger, Dominik (editor) / Drechsler, Astrid (author) / Frenzel, Ralf (author) / Zimmerer, Cordelia (author) / Synytska, Alla (author) / Rezaie, Ali Bashiri (author) / Ahmed, Ameer Hamza (author) / Liebscher, Marco (author)
RILEM-fib International Symposium on Fibre Reinforced Concrete ; 2024 ; Dresden, Germany
Transforming Construction: Advances in Fiber Reinforced Concrete ; Chapter: 2 ; 11-18
RILEM Bookseries ; 54
2024-09-12
8 pages
Article/Chapter (Book)
Electronic Resource
English
| British Library Online Contents | 2016
| British Library Online Contents | 2016
Fiber-reinforced cement composites
| UB Braunschweig | 1992
Fiber-reinforced cement composites
| TIBKAT | 1992
| British Library Online Contents | 2017