Surface-Functionalized Nanocelluloses as Viscosity-Modifying Agents in Engineered Cementitious Composites

This study investigated the feasibility of using nanofibrilliated celluloses (CNF) (0.1% by weight of binder materials) with three oxidation degrees, no oxidation (NCNF), low oxidation (LCNF), and high oxidation (HCNF), as a viscosity-modifying agent (VMA) to develop polyethylene fiber (PE)-engineer...

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Autores principales:	Long Liang, Junlei Yang, Guowei Lv, Zhen Lei, Xiurong Li, Qiaoling Liu
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	polyethylene fibers engineered cementitious composites nanofibrilliated celluloses rheology ultra-high ductility fracture toughness Technology T
Acceso en línea:	https://doaj.org/article/feb6e2c9b6a24d36957c1f3c3beaa282
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spelling	oai:doaj.org-article:feb6e2c9b6a24d36957c1f3c3beaa2822021-11-05T14:26:29ZSurface-Functionalized Nanocelluloses as Viscosity-Modifying Agents in Engineered Cementitious Composites2296-801610.3389/fmats.2021.783176https://doaj.org/article/feb6e2c9b6a24d36957c1f3c3beaa2822021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fmats.2021.783176/fullhttps://doaj.org/toc/2296-8016This study investigated the feasibility of using nanofibrilliated celluloses (CNF) (0.1% by weight of binder materials) with three oxidation degrees, no oxidation (NCNF), low oxidation (LCNF), and high oxidation (HCNF), as a viscosity-modifying agent (VMA) to develop polyethylene fiber (PE)-engineered cementitious composites (ECC). Attenuated total reflection-Fourier transform infrared (ATR-FTIR), dynamic light scattering (DLS), and zeta potential were performed to characterize the properties of the CNF with different oxidation degrees. More stable CNF suspensions could be obtained due to the increasing oxidation degree. Rheology tests showed that CNF replacing VMA could modify the plastic viscosity and yield stress of the fresh matrices. With increasing the oxidation degree of CNF, a significant enhancement was seen for the rheological parameters. It was conducted that CNF could increase the compressive strength, the tensile stress, the nominal flexural strength, and the fracture toughness compared with ECC using VMA, and much higher oxidation degrees yielded higher enhancements (HCNF > LCNF > NCNF). ECC using CNF to replace VMA also achieved ultra-high ductility behavior with the tensile strain of over 8% and the saturated multiple cracking pattern. These finds were supplemented by thermal gravimetric analysis (TGA), which showed that the degree of hydration increased with increasing CNF surface oxidation degree. Additionally, the morphology images of PE fibers were observed by scanning electron microscope (SEM).Long LiangLong LiangJunlei YangGuowei LvZhen LeiXiurong LiQiaoling LiuQiaoling LiuQiaoling LiuFrontiers Media S.A.articlepolyethylene fibersengineered cementitious compositesnanofibrilliated cellulosesrheologyultra-high ductilityfracture toughnessTechnologyTENFrontiers in Materials, Vol 8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	polyethylene fibers engineered cementitious composites nanofibrilliated celluloses rheology ultra-high ductility fracture toughness Technology T
spellingShingle	polyethylene fibers engineered cementitious composites nanofibrilliated celluloses rheology ultra-high ductility fracture toughness Technology T Long Liang Long Liang Junlei Yang Guowei Lv Zhen Lei Xiurong Li Qiaoling Liu Qiaoling Liu Qiaoling Liu Surface-Functionalized Nanocelluloses as Viscosity-Modifying Agents in Engineered Cementitious Composites
description	This study investigated the feasibility of using nanofibrilliated celluloses (CNF) (0.1% by weight of binder materials) with three oxidation degrees, no oxidation (NCNF), low oxidation (LCNF), and high oxidation (HCNF), as a viscosity-modifying agent (VMA) to develop polyethylene fiber (PE)-engineered cementitious composites (ECC). Attenuated total reflection-Fourier transform infrared (ATR-FTIR), dynamic light scattering (DLS), and zeta potential were performed to characterize the properties of the CNF with different oxidation degrees. More stable CNF suspensions could be obtained due to the increasing oxidation degree. Rheology tests showed that CNF replacing VMA could modify the plastic viscosity and yield stress of the fresh matrices. With increasing the oxidation degree of CNF, a significant enhancement was seen for the rheological parameters. It was conducted that CNF could increase the compressive strength, the tensile stress, the nominal flexural strength, and the fracture toughness compared with ECC using VMA, and much higher oxidation degrees yielded higher enhancements (HCNF > LCNF > NCNF). ECC using CNF to replace VMA also achieved ultra-high ductility behavior with the tensile strain of over 8% and the saturated multiple cracking pattern. These finds were supplemented by thermal gravimetric analysis (TGA), which showed that the degree of hydration increased with increasing CNF surface oxidation degree. Additionally, the morphology images of PE fibers were observed by scanning electron microscope (SEM).
format	article
author	Long Liang Long Liang Junlei Yang Guowei Lv Zhen Lei Xiurong Li Qiaoling Liu Qiaoling Liu Qiaoling Liu
author_facet	Long Liang Long Liang Junlei Yang Guowei Lv Zhen Lei Xiurong Li Qiaoling Liu Qiaoling Liu Qiaoling Liu
author_sort	Long Liang
title	Surface-Functionalized Nanocelluloses as Viscosity-Modifying Agents in Engineered Cementitious Composites
title_short	Surface-Functionalized Nanocelluloses as Viscosity-Modifying Agents in Engineered Cementitious Composites
title_full	Surface-Functionalized Nanocelluloses as Viscosity-Modifying Agents in Engineered Cementitious Composites
title_fullStr	Surface-Functionalized Nanocelluloses as Viscosity-Modifying Agents in Engineered Cementitious Composites
title_full_unstemmed	Surface-Functionalized Nanocelluloses as Viscosity-Modifying Agents in Engineered Cementitious Composites
title_sort	surface-functionalized nanocelluloses as viscosity-modifying agents in engineered cementitious composites
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/feb6e2c9b6a24d36957c1f3c3beaa282
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Surface-Functionalized Nanocelluloses as Viscosity-Modifying Agents in Engineered Cementitious Composites

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