Low surface area nanosilica from an agricultural biomass for fabrication of dental nanocomposites

Noushad, Mohammed; Rahman, Ismail Ab; Zulkifli, Noor Sheeraz Che; Husein, Adam; Mohamad, Dasmawati

doi:10.1016/j.ceramint.2013.08.073

Cited by 35 publications

(35 citation statements)

References 37 publications

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“…There is only limited literature available on the color stability of the commercially available four methacrylate-based composites, namely, G-aenial Universal Flo, Solare-X, Ceram.X One Universal, Neofil. The present study investigated the color stability of these materials and a novel rice husk composite [8], which is an organic nanocomposite that contains amorphous rice husk nanosilica. The nanosilica obtained from rice husk was silanized with 6 wt.% MPS.…”

Section: Introductionmentioning

confidence: 99%

“…The silanized fillers were then incorporated into the matrix phase and thoroughly mixed to obtain a homogenous paste. A ratio of 50 : 50 filler/matrix was used in the current study to prepare the dental nanocomposite [8]. The flexural strength, flexural modulus, compressive strength, hardness, and surface roughness tests of this novel rice husk composite though inferior were found to be comparable a commercially available composite (Z 250) [9].…”

Section: Introductionmentioning

confidence: 99%

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Color Stability of a New Rice Husk Composite in Comparison with Conventional Composites after Exposure to Commonly Consumed Beverages in Malaysia

Kacharaju

Hari

Chin

et al. 2019

International Journal of Dentistry

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Objective. To evaluate the color stability of a new organic rice husk nanocomposite as compared to four conventional composites after exposure to commonly consumed beverages in Malaysia. Methods. One hundred and twenty-five disk samples were prepared from a new rice husk-based composite and four other conventional methacrylate-based light-cured composites of shade A2. The samples were immersed in four commonly consumed beverages: coco-based drink, kopi, Chinese tea, and teh tarik for four weeks. The color measurements were carried out every week using the reflectance spectrophotometer according to the CIE L∗a∗b∗ color system. Color changes of samples (ΔE) in each week were calculated. Statistical analysis was carried out by performing a mixed ANOVA and Tukey’s post hoc test in order to analyse the differences in ΔE. Results. The findings revealed a statistically significant difference of ΔE reading (p<0.05) among all composites immersed in all four beverages after four weeks. Rice husk composites exhibited lesser color stability as compared to Ceram.X One Universal (p<0.001) and G-aenial Universal Flo (p<0.001) but showed higher color stability compared to Solare-X (p<0.001) and Neofil (p<0.001). Coffee and Chinese tea had the most significant impact on color changes (p<0.05) observed in all composites over four weeks of study. Conclusion. Rice husk composite showed acceptable color stability. It can be considered as an alternative to conventional composites due to its eco-friendly properties.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Color Stability of a New Rice Husk Composite in Comparison with Conventional Composites after Exposure to Commonly Consumed Beverages in Malaysia

Kacharaju

Hari

Chin

et al. 2019

International Journal of Dentistry

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“…chemical treatment, thermal treatment, and microbial treatment. The first stage is done in the p-ISSN 2528-1410 e-ISSN 2527-8045 extraction of silica in agricultural waste by acid leaching (Adam et al, 2008;Adam et al, 2011;Ding & Su, 2012;Li et al, 2011;Ang et al, 2012;Zulkifli et al, 2012;Gu et al, 2013;Noushad et al, 2014;Kongmanklang & Rangsriwatananon, 2015, Kumar et al, 2015. Acid leaching of agricultural waste is used to eliminate impurities and improve the purity of the silica contained therein.…”

Section: Methods For Extracting Silica From Agricultural Wastementioning

confidence: 99%

Review: Agricultural Wastes as a Source of Silica Material

Permatasari

Sucahya

Nandiyanto

2016

IJOST

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Silica is the most abundant components in the earth's crust and is made by way of synthesis for use in the application of technology. Silica are generally found commercially as alkoxysilane compounds (i.e such as tetraethylorthosilicate (TEOS), sodium silicate, and tetramethylorthosilicat). However, these compounds can have a negative impact on health. Thus, further approaches to find the source of silica that is safer, cheaper, and more environmentally friendly is inevitable. However, not all summary journals are thoroughly discussed the silica sources. Further, method of isolation and application of the silica from agricultural waste is limited. This paper reported studied several sources of silica derived from agricultural waste, such as rice husk, rice straw, corn cobs, and bagasse. In addition, this paper discussed also about the method of isolation of silica from agricultural waste, and its application as a catalyst.

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“…Copious extraction techniques of SNP from rice husk with varying degrees of purity and crystallinity were reported extensively (Mor et al 2017;Vaibhav et al 2015;Carmona et al 2013). Techniques such as heat treatments (Lu and Hsieh 2012), thermochemical treatments (Wang et al 2012;Ghorbani et al 2015;Abu et al 2016) and alkaline extraction followed by acidic precipitation (Hessien et al 2009;Adam et al 2011;Noushad et al 2014) have been attempted, whereby most techniques produced impure silica, highly agglomerated and nanostructured SNPs (Li and Zhu 2011). Recently, spherical mono-dispersed SNP synthesised from rice husk was demonstrated to have excellent efficiency in developing latent fingerprints on non-porous and semi-porous surfaces (Rajan et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Fluorescent variant of silica nanoparticle powder synthesised from rice husk for latent fingerprint development

Rajan

Zakaria

Shamsuddin

et al. 2019

Egypt J Forensic Sci

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Background: Fingerprint, though still remains one of the best possible means of individual identification, is often lost during the recovery process. The successful utilisation of developed fingerprint for identification relies on the contrast between the ridges and substrate which allows for the minutiae recognition and characterisation. However, the contrast is difficult to be achieved on challenging or difficult surfaces such as reflective, multicoloured and patterned materials. Methodology: Silica nanoparticles (SNP) were synthesised from rice husk using thermochemical treatment and incorporated with natural dyes. The photoluminescence of the powders was recorded and characterised using field emission scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray diffraction analysis and forensic alternative light source. The effectiveness of three fluorescent variant of the SNP powders and commercial fluorescent powder (CFP) was investigated by developing latent fingerprints deposited on different multicoloured substrates. Results: Spherical fluorescent silica nanoparticles were successfully synthesised from rice husk. Characterisation studies of coloured silica nanoparticles showed amorphous spherical silica nanoparticle with a mean particle size of approximately 200 nm. Silica nanoparticle doped with curcumin pigment exhibited strongest fluorescence and good stability when exposed to heat and aged at room temperature. The efficiency of the coloured silica nanoparticle was not compromised by the dye doping process as determined using electron microscope and surface tests on various surfaces. Conclusion: Findings demonstrated that fluorescent silica powder synthesised from rice husk and curcumin dye extract exhibited good photoluminescence and hence providing sufficient contrast for the fingerprint analysis on difficult and challenging surfaces. Additionally, the spherical mono-dispersed nanoparticles enhanced the clarity and selectivity of the powder.

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Low surface area nanosilica from an agricultural biomass for fabrication of dental nanocomposites

Cited by 35 publications

References 37 publications

Color Stability of a New Rice Husk Composite in Comparison with Conventional Composites after Exposure to Commonly Consumed Beverages in Malaysia

Color Stability of a New Rice Husk Composite in Comparison with Conventional Composites after Exposure to Commonly Consumed Beverages in Malaysia

Review: Agricultural Wastes as a Source of Silica Material

Fluorescent variant of silica nanoparticle powder synthesised from rice husk for latent fingerprint development

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