Ultrasonic dispersion of micro crystalline cellulose for developing cementitious composites with excellent strength and stiffness

Parveen, Shama; Rana, Sohel; Ferreira, Simão; Filho, Aloysio; Fangueiro, Raúl

doi:10.1016/j.indcrop.2018.05.060

Cited by 35 publications

(30 citation statements)

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“…[ 9 ]. Recently, it has been observed that the reinforcement of cementitious materials with cellulose microcrystals (CMC) and CNC at concentrations <2 wt.% improve the flexural and compressive strength between 20 and 50% of the final material [ 10 , 11 , 12 ], and the tensile strength and Young’s modulus of reinforced poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) with 12% of CNC-H were improved by 175 and 300%, respectively [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Obtaining of Cellulose Nanocrystals from Agave tequilana Weber Var. Azul Bagasse by Acid Hydrolysis

et al. 2021

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A multilevel factorial design of 23 with 12 experiments was developed for the preparation of cellulose nanocrystals (CNC) from Agave tequilana Weber var. Azul bagasse, an agro-industrial waste from tequila production. The studied parameters were acid type (H2SO4 and HCl), acid concentration (60 and 65 wt% for H2SO4, 2 and 8N for HCl) temperature (40 and 60 °C for H2SO4, 50 and 90 °C for HCl), and hydrolysis time (40, 55 and 70 min for H2SO4; and 30, 115 and 200 min for HCl). The obtained CNC were physical and chemically characterized using dynamic light scattering (DLS), atomic force microscopy (AFM), Fourier-transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XDR) techniques. The maximum CNC yield was 90 and 96% for HCL and H2SO4, respectively, and the crystallinity values ranged from 88–91%. The size and morphology of A. tequilana CNC strongly depends on the acid type and hydrolysis time. The shortest CNC obtained with H2SO4 (65 wt%, 40 °C, and 70 min) had a length of 137 ± 68 nm, width 33 ± 7 nm, and height 9.1 nm, whereas the shortest CNC obtained with HCl (2 N, 50 °C and 30 min) had a length of 216 ± 73 nm, width 69 ± 17 nm, and height 8.9 nm. In general, the obtained CNC had an ellipsoidal shape, whereas CNC prepared from H2SO4 were shorter and thinner than those obtained with HCl. The total sulfate group content of CNC obtained with H2SO4 increased with time, temperature, and acid concentration, exhibiting an exponential behavior of .

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Section: Introductionmentioning

confidence: 99%

Optimization of the Obtaining of Cellulose Nanocrystals from Agave tequilana Weber Var. Azul Bagasse by Acid Hydrolysis

et al. 2021

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“…Adding modified MCC to cement mortar was found to improve the flexural strength by double [ 116 ]. The composite of MCC and cementitious improved the cementitious by 19.2% with 1% of MCC addition [ 117 ]. Using nutshell with MCC to fill high-density polyethylene also made remarkable improvements in the flexural strength of the high-density polyethylene [ 118 ].…”

Section: Mechanical Properties Of Microcellulose and Nanocellulosementioning

confidence: 99%

Micro- and Nanocellulose in Polymer Composite Materials: A Review

et al. 2021

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The high demand for plastic and polymeric materials which keeps rising every year makes them important industries, for which sustainability is a crucial aspect to be taken into account. Therefore, it becomes a requirement to makes it a clean and eco-friendly industry. Cellulose creates an excellent opportunity to minimize the effect of non-degradable materials by using it as a filler for either a synthesis matrix or a natural starch matrix. It is the primary substance in the walls of plant cells, helping plants to remain stiff and upright, and can be found in plant sources, agriculture waste, animals, and bacterial pellicle. In this review, we discussed the recent research development and studies in the field of biocomposites that focused on the techniques of extracting micro- and nanocellulose, treatment and modification of cellulose, classification, and applications of cellulose. In addition, this review paper looked inward on how the reinforcement of micro- and nanocellulose can yield a material with improved performance. This article featured the performances, limitations, and possible areas of improvement to fit into the broader range of engineering applications.

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“…offer a high modulus and strength, high surface area, excellent bonding with cementitious matrices, good compaction and dense composite microstructure and consequently, significantly improved the mechanical properties of cementitious composites (Das et al 2009;Parveen et al 2017a;Balea et al 2019;Hisseine et al 2019;Tarchoun et al 2019). Although a positive effect was observed by NFC on the toughness of cementitious composites (Haddad Kolour et al 2020) probably due to its fibrillar structure with a high aspect ratio, CNC and MCC (due to their high stiffness and low aspect ratio) did not show any positive effect (or even deteriorated in some studies) on the toughness and ductility of cementitious composites (Parveen et al 2017b(Parveen et al , 2018. To overcome this, hierarchical cementitious composites have been developed more recently by combining two types of reinforcements, one of which improved the strength and stiffness (i.e.…”

Section: Introductionmentioning

confidence: 98%

“…MCC has recently attracted research attention as a reinforcement of polymeric and cementitious composites due to its high mechanical properties, low cost and commercial availability (Anju et al 2016;Rehman et al 2019;Mohan Bhasney et al 2020). However, it was observed that the reinforcing capability of MCC in cementitious composites was strongly dependent on the MCC dispersion state (Gómez Hoyos et al 2013;Parveen et al 2017bParveen et al , 2018. While direct mixing of MCC into cementitious composites (without any dispersion step) could not improve or even deteriorated the mechanical properties (Gómez Hoyos et al 2013), MCC dispersion using mechanical stirring and ultrasonication resulted in 20.5% and 19.2% improvements in flexural strength and 19.8% and 51.4% improvements in compressive strengths, respectively (Silva et al 2018;Parveen et al 2018).…”

Section: Introductionmentioning

confidence: 99%

“…However, it was observed that the reinforcing capability of MCC in cementitious composites was strongly dependent on the MCC dispersion state (Gómez Hoyos et al 2013;Parveen et al 2017bParveen et al , 2018. While direct mixing of MCC into cementitious composites (without any dispersion step) could not improve or even deteriorated the mechanical properties (Gómez Hoyos et al 2013), MCC dispersion using mechanical stirring and ultrasonication resulted in 20.5% and 19.2% improvements in flexural strength and 19.8% and 51.4% improvements in compressive strengths, respectively (Silva et al 2018;Parveen et al 2018). Moreover, an improved MCC dispersion using a non-ionic surfactant such as Pluronic F-127 further improved the mechanical properties of cementitious composites (flexural and compressive strength improved by 31% and 66%, respectively) (Parveen et al 2017b).…”

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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Ultrasonic dispersion of micro crystalline cellulose for developing cementitious composites with excellent strength and stiffness

Cited by 35 publications

References 30 publications

Optimization of the Obtaining of Cellulose Nanocrystals from Agave tequilana Weber Var. Azul Bagasse by Acid Hydrolysis

Optimization of the Obtaining of Cellulose Nanocrystals from Agave tequilana Weber Var. Azul Bagasse by Acid Hydrolysis

Micro- and Nanocellulose in Polymer Composite Materials: A Review

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

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