Preparation and characterization of nanocellulose from beer industrial residues using acid hydrolysis/ultrasound

Shahabi-Ghahafarrokhi, Iman; Khodaiyan, Faramarz; Mousavi, Mohammad; Yousefi, Hossein

doi:10.1007/s12221-015-0529-4

Cited by 89 publications

(38 citation statements)

References 28 publications

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“…The suspension of CNCs was prepared on the basis of sulfuric acid hydrolysis method [21,22]. Briefly, the wood pulp was oven-dried and milled to pass a 40-mesh sieve.…”

Section: Preparation Of Cellulose Nanocrystalsmentioning

confidence: 99%

Preparation and properties of polylactic acid-based composite fluorescent membrane based on layer-by-layer assembly

Wang¹,

Li²,

Liu³

2019

Express Polym. Lett.

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In this paper, a kind of multi-functional polylactic acid-based membrane with adjustable aggregate thickness and properties was prepared. When the number of assembled layers was 20 bilayers, the mean thickness of every bilayer was found to be 10.75±0.25 nm, and the tensile strength was increased by 20% compared with the polylactic acid (PLA) films. The assembled layered double hydroxides (LDHs) could serve as a type of promising organic-inorganic luminescent material, and endow PLA with photoluminescent properties. Besides, the photoluminescence of the composite films was discovered to be highly tunable by simply adjusting the structural constituents of LDHs, and the fluorescence intensity was uniformly enhanced as the number of assembled layers increases, which was not eliminated by the isolation due to cellulose nanocrystals (CNCs). Moreover, the composite films exhibited excellent fluorescence stability in comparison with the literature. After being repeatedly bleached 1000 times by confocal laser scanning fluorescence microscope, the fluorescence intensity of the PLA/(CNCs/Mg-Al-Eu LDHs) 10 film remained 96%. It could be concluded that the immobilization of CNCs and LDHs realized the microscopic controllability of the optical functional molecular spacing. With satisfactory fluorescence, the resulting PLA-based membranes exhibited considerable application potential in optoelectronic devices and anti-counterfeiting packaging.

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“…The suspension of CNCs was prepared on the basis of sulfuric acid hydrolysis method [21,22]. Briefly, the wood pulp was oven-dried and milled to pass a 40-mesh sieve.…”

Section: Preparation Of Cellulose Nanocrystalsmentioning

confidence: 99%

Preparation and properties of polylactic acid-based composite fluorescent membrane based on layer-by-layer assembly

Wang¹,

Li²,

Liu³

2019

Express Polym. Lett.

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“…X-ray diffraction pattern of α-cellulose reveals the existence of mixture of polymorphs of cellulose I and cellulose II. The existence of cellulose II can be evidenced by characteristic peaks at 2θ = 12 (110), 20 (210) and 22 (200) [30,31] and cellulose I by the presence of peaks at 2θ = 22 (200) and 34.6 (004) [32,33]. The X-ray diffraction pattern showing the doublet indicates the transformation of native cellulose from cellulose I to cellulose II [34].…”

Section: Morphologymentioning

confidence: 99%

Development of Biocomposites of MCC Extracted From Non-Wood Sources

Dipin¹,

Jinitha²,

Purushothaman³

2019

Journal of Renewable Materials

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The present work mainly focuses on the estimation of various components and the extraction of microcrystalline cellulose (MCC) from nonwood sources like Country Almond/Badam shell through acid hydrolysis. This hydrolyzed MCC was successfully used as reinforcement for development of biocomposites. Country Almond/Badam trees are found all over Kerala, India and they give nuts once in a year. Usually the nut shells are discarded and are becoming one of the sources of agricultural waste. During this investigation various components were isolated from the Country Almond shells and they were characterised using different spectral and analytical techniques thereby the composition of Country Almond shells was successfully determined for the first time. The properties of MCC especially the crystalline nature depends on the source from which is isolated. FT-IR spectra give evidence for the chemical structure of MCC. Morphology of MCC was evidenced from scanning electron microscopy. Transmission electron microscopy and atomic force microscopy reveal the agglomerated bundles of particles and rough surface of MCC. The extracted MCC was found to contain Cellulose I and Cellulose II polymorphs, and this was confirmed from the X-ray diffraction (XRD) studies. The MCC extracted from Country Almond shells has reasonably good thermal stability. Solution casting method was adopted for the development of green composite of Poly (vinyl alcohol) reinforced with MCC extracted from Country Almond shell. The mechanical property of developed composites has been enhanced by the addition of MCC. The dispersion of MCC in the PVA matrix and flocculation of MCC significantly influence the mechanical strength.

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“…The dimensions of NC are generally dependent not only on the acid species, acid concentration, time, and temperature of the hydrolysis reaction but also on the different origin of cellulose (Table ). Dialysis against distilled water is then performed to remove any free acid molecules from the dispersion . Specific hydrolysis and separation protocols have been developed, which depends on the origin of cellulosic fibers.…”

Section: Nanocellulose (Nc): Multifunctionalization Nanomaterialsmentioning

confidence: 99%

“…Dialysis against distilled water is then performed to remove any free acid molecules from the dispersion. 97 Specific hydrolysis and separation protocols have been developed, which depends on the origin of cellulosic fibers. It has been pointed out that the rod-like NC particle from different sources has a diameter and length ranging from 5 to 20 nm and from 100 nm to several micrometers, respectively.…”

Section: Nc: Synthesis Processmentioning

confidence: 99%

Nanocellulose reinforced as green agent in polymer matrix composites applications

Rashid

Julkapli

Yehye

2018

Polymers for Advanced Techs

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Owing to their abundance, high strength and stiffness, and low weight and biodegradability, nanocellulose (NC) is regarded as a promising candidate for the preparation of green composites. The high reinforcing effect assigned to the mechanical percolation phenomenon of NC is due to the stiff continuous networks of cellulosic nanoparticles linked via hydrogen bonding. Compared to nanocrystalline cellulose, NC fibers result in more significant improvement to the modulus, stiffness, and strength as aspect ratio NC fiber is higher compared to NC crystal. Indeed, in the case of biopolymer composites, the reinforcement effect of NC is attributed to the NC‐polymer interactions and the reinforcing effect occurring through effective stress transfer at the NC‐polymer interface. The NC‐reinforced composites tend to become more brittle as the concentration of the reinforcing particles increase up to the saturated level, due to the reduction in surface adhesion between filler and matrix. Due to its promising mechanical and structural stability, NC composites have been used widely in many industrial applications such as food packaging, electronic applications, and tissue engineering.

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Preparation and characterization of nanocellulose from beer industrial residues using acid hydrolysis/ultrasound

Cited by 89 publications

References 28 publications

Preparation and properties of polylactic acid-based composite fluorescent membrane based on layer-by-layer assembly

Preparation and properties of polylactic acid-based composite fluorescent membrane based on layer-by-layer assembly

Development of Biocomposites of MCC Extracted From Non-Wood Sources

Nanocellulose reinforced as green agent in polymer matrix composites applications

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