Effect of the addition of silica obtained from rice husk on physicochemical and mechanical properties of fibercement

Hincapie-Rojas, D.F.; Jimenez-Garcia, F.N.; Álvarez-Vargas, César Augusto

doi:10.1016/j.heliyon.2023.e13567

Cited by 3 publications

(2 citation statements)

References 26 publications

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“…The use of secondary raw materials in the production of fibre cement is a common research topic, as evidenced by available studies. Gomez Mejia et al [5] examined the impact of various forms of silica fume from rice husk on the physicochemical and mechanical properties of fibre cement. Savastano et al [6] investigated the utilization of fibrous wastes, such as sisal fibre, banana fibre, Eucalyptus grandis fibre, and Pinus radiata fibre, and observed their effect on the microstructure of fibre cement.…”

Section: Introductionmentioning

confidence: 99%

Using shredded fibre cement recyclate to produce new innovative fibre cement boards

Khongová,

Frank,

Krejčí Kotlánová

et al. 2024

J. Phys.: Conf. Ser.

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The study investigated the effect of the addition of crushed recyclate on the final properties of fibre cement boards. In some fibre cement board production technologies, waste in the form of solid trimmings accounts for up to 7% of total production, which is not an insignificant amount. The research aims to maximise the use of the waste generated and its effective reintegration into the production of new fibre cement boards. In the experimental work, shredded recyclate was used in varying quantities to replace expanded perlite. The results obtained show that the reuse of shredded recyclate has a minimal impact on the observed physical and mechanical properties. A similar trend was found when evaluating the durability tests. The proposed solution for the reuse of recyclate can be considered successful both in terms of production technology and the properties of the fibre cement boards achieved.

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Section: Introductionmentioning

confidence: 99%

Using shredded fibre cement recyclate to produce new innovative fibre cement boards

Khongová,

Frank,

Krejčí Kotlánová

et al. 2024

J. Phys.: Conf. Ser.

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“…The present investigation utilized agro-based rice husk (RH) as feedstock to produce plasma-modified biosorbents. The estimated rice production worldwide was approximately 517.1 million tons in 2021 25 , which gives a virtually unlimited zero-cost raw material resource for scientific studies 26 . Since RH is abundant, contains several functional groups, and is a no-cost agricultural by-product, much research effort has been on the preparation of effective biosorbents to remove organic contaminants.…”

Section: Introductionmentioning

confidence: 99%

Highly effective removal of perfluorooctanoic acid (PFOA) in water with DBD-plasma-enhanced rice husks

Sahara,

Wongsawaeng,

Ngaosuwan

et al. 2023

Sci Rep

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Adsorption is regarded as an efficient method to eliminate per- and polyfluoroalkyl substances from an aqueous solution. In the present investigation, an adsorbent based on rice husks (RHs) was successfully prepared by phosphoric acid (PA) activation and dielectric barrier discharge (DBD) plasma treatment, and it was used to adsorb perfluorooctanoic acid (PFOA) from water. The electrodes employed in the experiment were planar type. This research investigated RH surface properties and adsorption capacity before and after modification using DBD plasma. The results revealed that the He–O2 plasma modification introduced oxygen-containing functional groups and increased the PFOA removal efficiency. Increasing the oxygen content and total gas flow rate to 30 vol.% and 1.5 L/min, respectively, with 10 min of RH plasma treatment time at 100 W plasma discharge power enhanced the PFOA removal efficiency to 92.0%, while non-treated RH showed the removal efficiency of only 46.4%. The removal efficiency of the solution increased to 96.7% upon adjusting the pH to 4. The adsorption equilibrium isotherms fitted the Langmuir model, and the adsorption kinetic followed the pseudo-second-order model. The maximum adsorption capacity was 565 mg/g when the Langmuir isotherm model was applied.

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Biocompatible nanocomposite for scaffolds in tissue engineering: A breakthrough discovery for regenerative therapy

Praseetha,

Alexander,

Gangadhar

et al. 2024

Polymers for Advanced Techs

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By promoting tissue regeneration, porous nano‐scaffolds offer improved chances for the maintenance, repair, and enhancement of damaged tissues and organ functioning. In this study, the nanosilica extract obtained from the agricultural waste, that is, rice husk after surface modification shows higher hydrophobicity in the hexamethyldisilazane and methyltrimethoxysilane‐modified nanosilica and hydrophilic nature in 3‐aminopropyl triethoxysilane‐modified nanosilica. Fourier transform infrared spectroscopy results reveal the functional groups exist in the scaffold and its surface morphology was evaluated by Field emission scanning electron microscope/energy dispersive X‐ray analysis which shows a cross‐network structure that could impart the proper cell adhesion. The presence of amorphous nanosilica in ultrapure form was confirmed using X‐ray diffraction analysis where a broad peak was obtained in the range of 15°–40°. The crystallization phase of the hybrid scaffold shows 2θ values obtained at 22.6°, 28.7°, and 40.6°. The graph thus obtained confirms that the material used is 3‐aminopropyl‐triethoxysilane‐modified silk/silica nanocomposite. The decomposition rates and temperature of the composite were analyzed using the thermogravimetry/differential thermal technique. The antibacterial activity of the hybrid scaffolds and silk and silica shows the metabolic pathways were not disrupted for both Gram‐positive and ‐negative microbes. Cell cytotoxicity analysis proved that the electrospun hybrid scaffold was nontoxic to L929 cells and promoted cell adhesion and growth. The cells were highly proliferated onto the surface layers in a regular systematic pattern thus proving that these scaffolds were suitable for bone regeneration applications. Hence these economically viable scaffolds turn to be biocompatible and are promising as a novel product for cell culture regneration realted to therapy.

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Effect of the addition of silica obtained from rice husk on physicochemical and mechanical properties of fibercement

Cited by 3 publications

References 26 publications

Using shredded fibre cement recyclate to produce new innovative fibre cement boards

Using shredded fibre cement recyclate to produce new innovative fibre cement boards

Highly effective removal of perfluorooctanoic acid (PFOA) in water with DBD-plasma-enhanced rice husks

Biocompatible nanocomposite for scaffolds in tissue engineering: A breakthrough discovery for regenerative therapy

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