Replacement of Commercial Silica by Rice Husk Ash in Epoxy Composites: A Comparative Analysis

Fernandes, Iara Janaína; Santos, Ramon Vieira; Santos, Emanuele Caroline Araújo dos; Rocha, Tatiana Louise Ávila de Campos; Domingues, Nei S.; Moraes, Carlos Alberto Mendes

doi:10.1590/1980-5373-mr-2016-0562

Cited by 28 publications

(12 citation statements)

References 22 publications

(25 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 12 shows the FT-IR spectra of degassed composites containing base diatoms. For resin samples, we can observe characteristic bands at a wavelength of 2950–2800 cm −1 for C–H aliphatic bonds, 1450–1400 cm −1 for C–O bonds, 1258 cm −1 , and 1100–650 cm −1 for different C–H bonds [ 24 ]. The strong band at 2962 cm −1 is typical for the vibration of CH, CH 2 , and terminal methyl groups.…”

Section: Resultsmentioning

confidence: 99%

A New Method of Diatomaceous Earth Fractionation—A Bio-Raw Material Source for Epoxy-Based Composites

et al. 2021

View full text Add to dashboard Cite

The authors of this paper use an original method of diatomaceous earth fractionation, which allows for obtaining a filler with a specific particle size distribution. The method makes it possible to separate small, disintegrated and broken diatom frustules from those which maintained their original form in diatomaceous earth. The study covers a range of tests conducted to prove that such a separated diatomic fraction (3–30 µm) shows features different from the base diatomite (from 1 to above 40 µm) used as an epoxy resin filler. We have examined the mechanical properties of a series of diatomite/resin composites, considering the weight fraction of diatoms and the parameters of the composite production process. The studied composites of Epidian 601 epoxy resin cross-linked with amine-based curing agent Z-1 contained 0 to 70% vol. of diatoms or diatomaceous earth. Samples were produced by being casted into silicone molds in vacuum degassing conditions and, alternatively, without degassing. The results have shown that the size and morphology of the filler based on diatomaceous earth affects mechanical and rheological properties of systems based on epoxy resin. Elongation at rupture and flexural stress at rupture were both raised by up to 35%, and impact strength by up to 25%.

show abstract

Section: Resultsmentioning

confidence: 99%

A New Method of Diatomaceous Earth Fractionation—A Bio-Raw Material Source for Epoxy-Based Composites

et al. 2021

View full text Add to dashboard Cite

show abstract

“…While studying the performance between unfilled and filled epoxidized natural rubber (ENR) with RH ash, it was shown that the filled ENR provided a higher tensile strength than the unfilled ENR. A study of the differences in mechanical properties between RH ash filler and high-purity silica in an epoxy matrix composite by Fernandes et al [ 21 ] found that similar characteristics were observed. They claimed that RH ash could replace silica with little loss of desirable properties.…”

Section: Tensile Strength Of Rh Compositesmentioning

confidence: 96%

Recent Progress of Rice Husk Reinforced Polymer Composites: A Review

et al. 2021

View full text Add to dashboard Cite

Recently, because of the rising population, carbon overloading, and environmental distress, human beings have needed to increase awareness and responsibility for the reduction of agricultural waste. The utilization of agricultural waste as a filler material in reinforced polymers is a fascinating discovery. This review paper attempts to study the physical, mechanical, and thermal behavior of rice husk (RH) as a fiber for reinforcing various synthetic polymers, based on recent studies, conducted between 2017 and 2021. It also highlights that advanced modification techniques could further improve the performance of composites by tailoring the physical and chemical substances of the fiber or matrix. The thermal properties, including flame-retardance and thermal behavior, are also discussed. The characteristics of the fiber–matrix interaction between RH and the polymer matrix provide essential insights into the future-ready applications of this agricultural waste fiber. The way forward in researching RH polymer composites is finally reviewed.

show abstract

“…The rice husk arouses interest due to its composition rich in silica, availability, and cost, being able to add value to this residue and for its utilization as a secondary source of materials [30,31]. Rice husk is an abundant waste material derived from agricultural production and has been used with great efficiency as an energy source through burning.…”

Section: Rice Husk Ashmentioning

confidence: 99%

Comparative study using different external sources of aluminum on the zeolites synthesis from rice husk ash

Klunk

Das

Dasgupta

et al. 2020

Mater. Res. Express

Self Cite

View full text Add to dashboard Cite

Rice husk is considered as a waste in the rice industry but is proficient in manufacturing different materials, such as zeolites, which is produced in large quantities all over the world, for example in Brazil. Zeolite is an adsorbent support material, which can be synthesized from rice husk ash (RHA) with external sources of aluminium (ESA). The scientific community has been conducting several measures to minimize the environmental impacts caused by greenhouse gases. Several mitigation processes are presently investigated, which includes carbon dioxide injections into adsorbent materials (e.g. zeolites). The efficiency of this technology involves a zeolitic material with high crystallinity and high concentrations of SiO 2 and Al 2 O 3 (aluminosilicates). In the present work, zeolites have been synthesized from rice husk ash (SiO 2 source) and external aluminium sources (Al 2 O 3 -alumina, gibbsite and metakaolin) to fulfill that purpose. With the aid of XRF, XRD, SEM/ EDS and FTIR techniques, the zeolitic material was characterized in two distinct crystalline phases: Mordenite and ZSM-5. The synthesis was carried out by the ideal addition of ESA (2.5 g) to RHA. According to the literature, the zeolitic materials formed by the mixture of Mordenite and ZSM-5 can be availed for gas separation and greenhouse gas storage.

show abstract

Replacement of Commercial Silica by Rice Husk Ash in Epoxy Composites: A Comparative Analysis

Cited by 28 publications

References 22 publications

A New Method of Diatomaceous Earth Fractionation—A Bio-Raw Material Source for Epoxy-Based Composites

A New Method of Diatomaceous Earth Fractionation—A Bio-Raw Material Source for Epoxy-Based Composites

Recent Progress of Rice Husk Reinforced Polymer Composites: A Review

Comparative study using different external sources of aluminum on the zeolites synthesis from rice husk ash

Contact Info

Product

Resources

About