Hybrid Effect of PVA Fibre and Carbon Nanotube on the Mechanical Properties and Microstructure of Geopolymers

The concept of geopolymers has been widely studied since it was proposed. However, the wide range of applications of geopolymers is affected by brittleness and poor crack resistance. In this study, the mechanical properties of geopolymers with single-doped PVA fibres, single-doped carbon nanotubes,...

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Autores principales:	Tao Meng, Xiufen Yang, Yue Yu, Hongming Yu, Miaozhou Huang
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	strengthen fibre nanometer material microscopic analysis mechanical characteristics Technology T
Acceso en línea:	https://doaj.org/article/798f8d16d0c54f429e9cc80823f6e3fc
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spelling	oai:doaj.org-article:798f8d16d0c54f429e9cc80823f6e3fc2021-11-30T22:48:35ZHybrid Effect of PVA Fibre and Carbon Nanotube on the Mechanical Properties and Microstructure of Geopolymers2296-801610.3389/fmats.2021.773103https://doaj.org/article/798f8d16d0c54f429e9cc80823f6e3fc2021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fmats.2021.773103/fullhttps://doaj.org/toc/2296-8016The concept of geopolymers has been widely studied since it was proposed. However, the wide range of applications of geopolymers is affected by brittleness and poor crack resistance. In this study, the mechanical properties of geopolymers with single-doped PVA fibres, single-doped carbon nanotubes, and mixed PVA fibers and carbon nanotubes were studied respectively first. It was found that PVA fibres and carbon nanotubes had a positive effect on improving the mechanical properties of geopolymers, especially bending strength and flexural strength. Moreover, the incorporation of PVA fibre could improve the damage morphology of geopolymers. Additionally, the phase analysis, structural group analysis, and strengthening mechanism were studied via scanning electron microscopy, mercury intrusion porosimetry analysis, X-ray diffraction pattern characterisation, Fourier transform infrared spectroscopy analysis, and magic angle spinning nuclear magnetic resonance analysis. It was found that the strengthening effect of PVA fiber to the geopolymer was primarily a physical strengthening effect, whereas the strengthening effect of carbon nanotubes to the geopolymers was both chemical and physical. Finally, based on the previous study, a multi-scale dual-fibre strengthening mechanism was proposed. Micro-nano fibre composites were used to improve microstructure via physical and chemical effects. This is helpful to improve the performance and application of geopolymers. Furthermore, it lays a preliminary theoretical foundation for engineering applications and technical improvement of geopolymers in the future.Tao MengXiufen YangYue YuYue YuHongming YuHongming YuMiaozhou HuangMiaozhou HuangFrontiers Media S.A.articlestrengthenfibrenanometer materialmicroscopic analysismechanical characteristicsTechnologyTENFrontiers in Materials, Vol 8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	strengthen fibre nanometer material microscopic analysis mechanical characteristics Technology T
spellingShingle	strengthen fibre nanometer material microscopic analysis mechanical characteristics Technology T Tao Meng Xiufen Yang Yue Yu Yue Yu Hongming Yu Hongming Yu Miaozhou Huang Miaozhou Huang Hybrid Effect of PVA Fibre and Carbon Nanotube on the Mechanical Properties and Microstructure of Geopolymers
description	The concept of geopolymers has been widely studied since it was proposed. However, the wide range of applications of geopolymers is affected by brittleness and poor crack resistance. In this study, the mechanical properties of geopolymers with single-doped PVA fibres, single-doped carbon nanotubes, and mixed PVA fibers and carbon nanotubes were studied respectively first. It was found that PVA fibres and carbon nanotubes had a positive effect on improving the mechanical properties of geopolymers, especially bending strength and flexural strength. Moreover, the incorporation of PVA fibre could improve the damage morphology of geopolymers. Additionally, the phase analysis, structural group analysis, and strengthening mechanism were studied via scanning electron microscopy, mercury intrusion porosimetry analysis, X-ray diffraction pattern characterisation, Fourier transform infrared spectroscopy analysis, and magic angle spinning nuclear magnetic resonance analysis. It was found that the strengthening effect of PVA fiber to the geopolymer was primarily a physical strengthening effect, whereas the strengthening effect of carbon nanotubes to the geopolymers was both chemical and physical. Finally, based on the previous study, a multi-scale dual-fibre strengthening mechanism was proposed. Micro-nano fibre composites were used to improve microstructure via physical and chemical effects. This is helpful to improve the performance and application of geopolymers. Furthermore, it lays a preliminary theoretical foundation for engineering applications and technical improvement of geopolymers in the future.
format	article
author	Tao Meng Xiufen Yang Yue Yu Yue Yu Hongming Yu Hongming Yu Miaozhou Huang Miaozhou Huang
author_facet	Tao Meng Xiufen Yang Yue Yu Yue Yu Hongming Yu Hongming Yu Miaozhou Huang Miaozhou Huang
author_sort	Tao Meng
title	Hybrid Effect of PVA Fibre and Carbon Nanotube on the Mechanical Properties and Microstructure of Geopolymers
title_short	Hybrid Effect of PVA Fibre and Carbon Nanotube on the Mechanical Properties and Microstructure of Geopolymers
title_full	Hybrid Effect of PVA Fibre and Carbon Nanotube on the Mechanical Properties and Microstructure of Geopolymers
title_fullStr	Hybrid Effect of PVA Fibre and Carbon Nanotube on the Mechanical Properties and Microstructure of Geopolymers
title_full_unstemmed	Hybrid Effect of PVA Fibre and Carbon Nanotube on the Mechanical Properties and Microstructure of Geopolymers
title_sort	hybrid effect of pva fibre and carbon nanotube on the mechanical properties and microstructure of geopolymers
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/798f8d16d0c54f429e9cc80823f6e3fc
work_keys_str_mv	AT taomeng hybrideffectofpvafibreandcarbonnanotubeonthemechanicalpropertiesandmicrostructureofgeopolymers AT xiufenyang hybrideffectofpvafibreandcarbonnanotubeonthemechanicalpropertiesandmicrostructureofgeopolymers AT yueyu hybrideffectofpvafibreandcarbonnanotubeonthemechanicalpropertiesandmicrostructureofgeopolymers AT yueyu hybrideffectofpvafibreandcarbonnanotubeonthemechanicalpropertiesandmicrostructureofgeopolymers AT hongmingyu hybrideffectofpvafibreandcarbonnanotubeonthemechanicalpropertiesandmicrostructureofgeopolymers AT hongmingyu hybrideffectofpvafibreandcarbonnanotubeonthemechanicalpropertiesandmicrostructureofgeopolymers AT miaozhouhuang hybrideffectofpvafibreandcarbonnanotubeonthemechanicalpropertiesandmicrostructureofgeopolymers AT miaozhouhuang hybrideffectofpvafibreandcarbonnanotubeonthemechanicalpropertiesandmicrostructureofgeopolymers
_version_	1718406210250604544

Hybrid Effect of PVA Fibre and Carbon Nanotube on the Mechanical Properties and Microstructure of Geopolymers

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