Review on the physicochemical treatments of rice husk for production of advanced materials

Soltani, N.; Bahrami, Amin; Pech-Canul, M.I.; González, L.

doi:10.1016/j.cej.2014.11.056

Cited by 480 publications

(229 citation statements)

References 284 publications

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“…Rice hulls represents approximately 20% of the dry weight of the rice harvest 5 . Rice hulls contain 36-40 g/100 g cellulose and 12-19 g/100 g hemicelluloses.…”

Section: Introductionmentioning

confidence: 99%

Nanocellulose Produced from Rice Hulls and its Effect on the Properties of Biodegradable Starch Films

et al. 2016

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Rice hull is a residue from agro-industry that can be used to produce nanocellulose. We produced nanocellulose from rice hulls through bleaching (with a 5% NaOH solution followed by a peracetic acid solution) and acid hydrolysis at a mild temperature (45ºC) followed by ultrasonication. We investigated the microstructure, crystallinity and thermal stability of these materials and studied their effects on the properties of starch films. After bleaching, the compact structure around the cellulosic fibers was removed, and the lignin content of the residue decreased from 7.22 to 4.22%. The obtained nanocellulose presented a higher crystallinity (up 70%), higher thermal stability than the raw material and lignin contents below 0.35%. The nanocellulose formed interconnected webs of tiny fibers (< 100 nm in diameter), which decreased the opacity, water vapor permeability and improved the mechanical properties when added as reinforcement in the starch films.

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“…Rice hulls represents approximately 20% of the dry weight of the rice harvest 5 . Rice hulls contain 36-40 g/100 g cellulose and 12-19 g/100 g hemicelluloses.…”

Section: Introductionmentioning

confidence: 99%

Nanocellulose Produced from Rice Hulls and its Effect on the Properties of Biodegradable Starch Films

et al. 2016

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“…The effect of alkali carbonate in the activation process can be related to formation of porosity due to SiO2 interaction with the carbonates, CO 2 reacts with the carbon phase with formation of CO, according following reaction (Soltani et al, 2015) M 2 CO 3 + SiO 2 = M 2 SiO 3 + CO 2 CO 2 + C = 2CO…”

Section: Preparation Of Activated Carbonmentioning

confidence: 99%

“…Silicon nitrate is produced by the nitridation of rice husk can be represented by the following reactions (Soltani et al, 2015) SiO 2 (s)+C(s)= SiO(g)+ CO (g)…”

Section: As Source Of Fuelmentioning

confidence: 99%

“…Rice husk ash (RHA) is the by-product of RH, when it burnt in ambient atmosphere. 20 million tonnes produced per year by world (Koteswara and Pranav, 2011;Soltani et al, 2015). Due to low density and less commercial interest of RH, handling as well as transportation it is problematic, which creates disposal and serious environmental problems (Pode, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Rice husk (RH) is widely available in rice producing countries like China and India which contributes 33% and 22% of global rice production respectively, as by-product of the rice milling. RH content ranges from 16-25% of paddy (Della et al, 2002;Giddel et al, 2007;Soltani et al, 2015). Every year approximately 500 million tonne paddy produced by world and 120 million tonnes of paddy produced by India, it gives around 24 million tonnes of RH per year (Shwetha et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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