Combination of twin-screw extruder and homogenizer to produce high-quality nanofibrillated cellulose with low energy consumption

Rol, Fleur; Banvillet, Gabriel; Meyer, Valérie; Petit‐Conil, Michel; Bras, Julien

doi:10.1007/s10853-018-2414-1

Cited by 33 publications

(25 citation statements)

References 53 publications

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“…In this parameter, the lowest values were observed for HPH and UFG, resulting in more nanofibrillated suspensions than those obtained by TSE. Similar values were reported for enzymatic CNFs (242 NTU) treated via UFG (Desmaisons et al 2017), and lower than others nonpretreated pulps (427 NTU) (Rol et al 2018). On the other hand, the CNFs obtained by TEMPO-mediated oxidation, present value much lower (40-5 NTU) than those presented in this work (Moser et al 2015).…”

Section: Effect Of Mechanical Treatments On Cellulose Nanofibers Qualitysupporting

confidence: 86%

Use of multi-factorial analysis to determine the quality of cellulose nanofibers: effect of nanofibrillation treatment and residual lignin content

et al. 2020

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The aim of this work is to study and compare the influence of different nanofibrillation processes on the properties of cellulose nanofibers from wheat straw, and analyze the effect of the lignin in the nanocellulose quality and on the characteristics of the films produced. Wheat straw was subjected to a soda (NaOH) pulping process to obtain unbleached cellulosic pulp. The cellulosic pulp was bleached with NaClO 2 in order to remove the lignin of the fiber. Both bleached and unbleached pulps were used to obtain nanocellulose using mechanical pretreatment (PFI refining) and treatments, (high pressure homogenization, twin-screw extruder and ultrafine friction grinder). The effect of the nanofibrillation treatments and the residual lignin content on cellulose nanofiber production was analyzed by means of a deep characterization. A multi-factorial quality index was used to score the cellulose nanofibers produced to enable a benchmarking study between different sources, processes and characteristics. In addition, an energetic study of the production process was carried out for the different treatments. The different nanofibers were used to produce cellulose nanofiber-based films and characterized in order to establish a relationship between the characteristics of cellulose nanofibers and the characteristics of the final product.

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Section: Effect Of Mechanical Treatments On Cellulose Nanofibers Qualitysupporting

confidence: 86%

Use of multi-factorial analysis to determine the quality of cellulose nanofibers: effect of nanofibrillation treatment and residual lignin content

et al. 2020

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“…FESEM of A, B. CNFs Tacuara Cane, with different magnifications, A: 100.00 KX and B: 200 KX Both figures display a classical web-like network structure in which the fibrils occur as randomly entangled cellulosic nanofilaments.Figure 1Bshows homogeneous dispersion and uniform dimensions the diameter range of cellulose nanofibrils obtained. Similar structure was observed by authors were reported (Kwak et al 2018;Rol et al 2018)…”

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confidence: 91%

Graft modification in bamboo cellulose nanofibrils: An effective option to improve compatibility and tunable surface energy

Rodríguez-Ramírez¹,

Dufresne

D’Accorso

et al. 2021

Preprint

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In this work, from an endemic and non-significant value-added bamboo argentine, nanofibrils (CNFs) of 20 nm in width were obtained. These nanofibrils were chemical modified in surface with three simple steps using a noncommercial low molecular weight polylactic acid. The success of modification was confirmed by FTIR, TGA, DSC and XRD analysis. The modified nanofibrils were taken up for changing surface properties in films based on commercial PLA. The results show that dispersive (γ D/S) component of films increase of 34.7 mN/m to 36.1 mN/m after the addition of modified nanofibrils from 2 to 5% in formulation of the films, comparing with a physical blend. Interesting others result in physical, mechanical, and thermal properties of the nanocomposites, were reported.

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“…The plateau value is reached at the first pass through the New profile and similar results are obtained than after at least 4 passes through the profile 2 consuming the same energy. QI* 25 around 68 are evaluated which is a little bit lower compared to the literature 22,31,45 but the produced CNF can easily compete with commercial ones. 31 To conclude, high quality CNF are obtained in one pass through the TSE consuming only 2,100 kWh/t (dry matter) which was the objective.…”

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confidence: 91%

“…In one pass and consuming 2,500 kWh/t (dry matter), the New profile leads to sufficient nanofibrillation to present mechanical properties in accordance with the literature. 14,22,[43][44][45] The nanosized fraction of the pulp passed through the profile 2 increases from 59.8 ± 5.2 % to 74.2 ± 9.8 % and that passed through the New profile reached around 70 % directly after one pass. Turbidities are constant and almost the same, around 410 ± 20 and 380 ± 11 NTU for the pulp passed through the profile 2 and the New profile respectively, confirming that suspensions have similar properties.…”

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confidence: 98%

Nanocellulose Production by Twin-Screw Extrusion: Simulation of the Screw Profile To Increase the Productivity

Rol

Vergnes

Kissi

et al. 2019

ACS Sustainable Chem. Eng.

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Cellulose nanofibrils (CNF) have gained increased attention since the last fifteen years and can now be produced at high solid content in an energetically efficient way using twin-screw extrusion (TSE). In this study, screw profile was optimized using a simulation software in order to produce high quality CNF in one pass through the TSE, instead of several passes in other studies, decreasing the energy consumption, improving the productivity and hence making the industrialization of such process more probable. An optimized profile was designed using the software according to previous studies and enzymatic cellulose pulp was experimentally nanofibrillated. Produced CNF were characterized using several techniques such as optical microscopy, mechanical properties, turbidity, nanosized fraction or quality index. The optimized screw profile contains six blocks of kneading disks with left-handed staggering and imparts high levels of shear, strain and energy in the first pass. CNF were successfully produced in a single pass with equivalent quality than CNF produced in at least 4 passes using a classic profile, without changing the energy consumption. Produced CNF present high transparency and a Young's modulus around 13 GPa.

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Combination of twin-screw extruder and homogenizer to produce high-quality nanofibrillated cellulose with low energy consumption

Cited by 33 publications

References 53 publications

Use of multi-factorial analysis to determine the quality of cellulose nanofibers: effect of nanofibrillation treatment and residual lignin content

Use of multi-factorial analysis to determine the quality of cellulose nanofibers: effect of nanofibrillation treatment and residual lignin content

Graft modification in bamboo cellulose nanofibrils: An effective option to improve compatibility and tunable surface energy

Nanocellulose Production by Twin-Screw Extrusion: Simulation of the Screw Profile To Increase the Productivity

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