Effect of multiscale reinforcement on the mechanical properties and microstructure of microcrystalline cellulose-carbon nanotube reinforced cementitious composites

Alshaghel, Ahmad; Parveen, Shama; Rana, Sohel; Fangueiro, Raúl

doi:10.1016/j.compositesb.2018.05.024

Cited by 40 publications

(36 citation statements)

References 42 publications

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“…The kind of NC is a key factor, as proven by studies carried out by Vazquez et al [87], Hoyos et al [90], Cengiz et al [75], and Alshaghel et al [88]. They used commercial MCC, which has a lower aspect ratio (from 0.04 to 5) and a higher tendency to aggregate in clusters than those of CNF (the aspect ratio can reach values over 100), as showed by SEM images obtained by Alshaghel et al [88], Cengiz et al [75], and Tanpichai [109]. The low aspect ratio of MCC and its aggregate-forming clusters decrease its ability to bond cracks, reducing its reinforcing effect.…”

Section: Nanocelluloses In the Cement And Fiber-cement Industrymentioning

confidence: 99%

Nanocelluloses: Natural-Based Materials for Fiber-Reinforced Cement Composites. A Critical Review

et al. 2019

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Nanocelluloses (NCs) are bio-based nano-structurated products that open up new solutions for natural material sciences. Although a high number of papers have described their production, properties, and potential applications in multiple industrial sectors, no review to date has focused on their possible use in cementitious composites, which is the aim of this review. It describes how they could be applied in the manufacturing process as a raw material or an additive. NCs improve mechanical properties (internal bonding strength, modulus of elasticity (MOE), and modulus of rupture (MOR)), alter the rheology of the cement paste, and affect the physical properties of cements/cementitious composites. Additionally, the interactions between NCs and the other components of the fiber cement matrix are analyzed. The final result depends on many factors, such as the NC type, the dosage addition mode, the dispersion, the matrix type, and the curing process. However, all of these factors have not been studied in full so far. This review has also identified a number of unexplored areas of great potential for future research in relation to NC applications for fiber-reinforced cement composites, which will include their use as a surface treatment agent, an anionic flocculant, or an additive for wastewater treatment. Although NCs remain expensive, the market perspective is very promising.

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Section: Nanocelluloses In the Cement And Fiber-cement Industrymentioning

confidence: 99%

Nanocelluloses: Natural-Based Materials for Fiber-Reinforced Cement Composites. A Critical Review

et al. 2019

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“…The sample prepared with 100% TBP exhibited very low surface porosity indicating effective suppression of foam by the defoamer. Previous research on MCC-CNT reinforced cementitious composites also suggested 1:1 as the optimum TBP: CTAB ratio for preparing cementitious composites with low porosity and good mechanical properties (Alshaghel et al 2018). In case of Pluronic F-127 surfactant, a 0.5:1 ratio of TBP: Pluronic was found sufficient in suppressing foam formation and prepare composites with low volume of pores (Alshaghel et al 2018).…”

Section: Quality Of Freshly Prepared Mortar Pastesmentioning

confidence: 95%

“…the pre-cracking mechanical behavior) whereas the other reinforcement enhanced the toughness and ductility (i.e. the post-cracking behavior) (Alshaghel et al 2018;Cao et al 2019). For example, a combination of carbon nanotubes (CNTs) with MCC was used to improve both pre and post-cracking mechanical behavior of cementitious composites, in which MCC mainly improved the stiffness and strength, whereas CNTs controlled the post-cracking fracture behavior through crack-bridging (Alshaghel et al 2018).…”

Section: Introductionmentioning

confidence: 99%

“…the post-cracking behavior) (Alshaghel et al 2018;Cao et al 2019). For example, a combination of carbon nanotubes (CNTs) with MCC was used to improve both pre and post-cracking mechanical behavior of cementitious composites, in which MCC mainly improved the stiffness and strength, whereas CNTs controlled the post-cracking fracture behavior through crack-bridging (Alshaghel et al 2018). Although CNTs were proved to be an excellent reinforcing material for developing highstrength and ductile cementitious composites, their high cost, processing problems and toxicity limited their application in the construction industry.…”

Section: Introductionmentioning

confidence: 99%

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Micro-structure and mechanical properties of microcrystalline cellulose-sisal fiber reinforced cementitious composites developed using cetyltrimethylammonium bromide as the dispersing agent

et al. 2021

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This paper reports new hierarchical cementitious composites developed using microcrystalline cellulose (MCC), sisal fibers and cetyltrimethylammonium bromide (CTAB) as the dispersing agent. MCC was dispersed in water without and with CTAB at different concentrations using ultrasonication and the optimum CTAB concentration for achieving homogeneous and stable MCC suspensions was found to be 40%. Hierarchical composites were fabricated using MCC (0.1–1.5 wt% of cement), sisal fibers (20 mm, 0.25% and 0.50 wt% of cement), 40% CTAB and tri-butyl phosphate as the defoaming agent. Mechanical strengths of composites improved significantly at 0.1 wt% MCC, which along with 0.5% sisal fibers improved compressive and flexural strengths by ~ 24% and ~ 18%, respectively. The hybrid reinforcement exhibited a synergistic effect on the fracture behavior of composites improving the fracture energy up to 40%. Hierarchical composites also showed improved fiber-matrix bonding, lower porosity and water absorption, superior hydration, carbonation resistance and durability up to 90 ageing cycles.

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“…e fundamental challenge for applied research on carbon nanotube-reinforced nanocomposites can be illustrated by the electron microscope images shown in Figure 1, where multiwalled carbon nanotubes (decade nanometers in diameter) are deposited on the surface of carbon fibers (a few microns in diameter) in yarn bundles (a few millimeters in diameter) [17,18]. e variation in the characteristic length scale of the reinforcement presents both new challenges and significant advantages in the development of fabrication techniques for carbon nanotube-reinforced nanocomposites [19][20][21][22] and the development of characterization techniques for such nanocomposites [23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Characterization Techniques for the Interface in Carbon Nanotube-Reinforced Polymer Nanocomposites

Chen

Gao

2019

Advances in Materials Science and Engineering

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The current state of characterization techniques for the interface in carbon nanotube-reinforced polymer nanocomposites is reviewed. Different types of interfaces that exist within the nanocomposites are summarized, and current efforts focused on understanding the interfacial properties and interactions are reviewed. The emerging trends in characterization techniques and methodologies for the interface are presented, and their strengths and limitations are summarized. The intrinsic mechanism of the interactions at the interface between the carbon nanotubes and the polymer matrix is discussed. Special attention is given to research efforts focused on chemical functionalization of carbon nanotubes. The benefits and disadvantages associated with covalent and noncovalent functionalization methods are evaluated, respectively. Various techniques used to characterize the properties of the interface are extensively reviewed. How the mechanical and thermal properties of the nanocomposites depend on the physical and chemical nature of the interface is also discussed. Better understanding and design of the interface at the atomic level could become the forefront of research in the polymer community. Potential problems going to be solved are finally highlighted.

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Effect of multiscale reinforcement on the mechanical properties and microstructure of microcrystalline cellulose-carbon nanotube reinforced cementitious composites

Cited by 40 publications

References 42 publications

Nanocelluloses: Natural-Based Materials for Fiber-Reinforced Cement Composites. A Critical Review

Nanocelluloses: Natural-Based Materials for Fiber-Reinforced Cement Composites. A Critical Review

Micro-structure and mechanical properties of microcrystalline cellulose-sisal fiber reinforced cementitious composites developed using cetyltrimethylammonium bromide as the dispersing agent

Recent Advances in Characterization Techniques for the Interface in Carbon Nanotube-Reinforced Polymer Nanocomposites

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