A comparative study of Eucalyptus and Pinus radiata pulp fibres as raw materials for production of cellulose nanofibrils

Syverud, Kristin; Chinga-Carrasco, Gary; Toledo, Juan; Toledo, Pedro G.

doi:10.1016/j.carbpol.2010.12.066

Cited by 146 publications

(87 citation statements)

References 20 publications

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“…NFC is nanosized cellulosic chains with dimensions less than 50 nm wide and lengths in the order of several micrometers [4,5]. NFC can be produced by applying a mechanical treatment such as high-pressure homogenization, microfluidization, grinding, and ultrasonication, to bleached pulps [3].…”

Section: Introductionmentioning

confidence: 99%

Nanofibrillated Cellulose from Appalachian Hardwoods Logging Residues as Template for Antimicrobial Copper

Hassanzadeh

Sabo

Rudie

et al. 2017

Journal of Nanomaterials

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TEMPO nanofibrillated cellulose (TNFC) from two underutilized Appalachian hardwoods, Northern red oak (Quercus rubra) and yellow poplar (Liriodendron tulipifera), was prepared to determine its feasibility to be used as template for antimicrobial metallic copper particles. In addition, a comparison of the TNFC from the two species in terms of their morphological, chemical, thermal, and mechanical properties was also performed. The woody biomass was provided in the form of logging residue from Preston County, West Virginia. A traditional kraft process was used to produce the pulp followed by a five-stage bleaching. Bleached pulps were then subjected to a TEMPO oxidation process using the TEMPO/NaBr/NaClO system to facilitate the final mechanical fibrillation process and surface incorporation of metallic copper. The final TNFC diameters for red oak and yellow poplar presented similar dimensions, 3.8 ± 0.74 nm and 3.6 ± 0.85 nm, respectively. The TNFC films fabricated from both species exhibited no statistical differences in both Young's modulus and the final strength properties. Likely, after the TEMPO oxidation process both species exhibited similar carboxyl group content, of approximately 0.8 mmol/g, and both species demonstrated excellent capability to incorporate antimicrobial copper on their surfaces.

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Section: Introductionmentioning

confidence: 99%

Nanofibrillated Cellulose from Appalachian Hardwoods Logging Residues as Template for Antimicrobial Copper

Hassanzadeh

Sabo

Rudie

et al. 2017

Journal of Nanomaterials

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“…the used raw material (Zimmermann et al 2010;Syverud et al 2011), the chosen pretreatment (Henriksson et al 2007;Pääkko et al 2007) and many others. Among the influencing factors, fibre size distribution of the raw material is also important.…”

Section: Introductionmentioning

confidence: 99%

Morphology and rheology of cellulose nanofibrils derived from mixtures of pulp fibres and papermaking fines

et al. 2016

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The rheological behaviour of homogenised fibres originally having different lengths was evaluated. For this purpose, mixtures of pulp fibres and fines were fibrillated mechanically without pretreatment and characterised with regard to morphology and viscosity. It was found that, for all samples, a similar number of homogenisation passes was needed to reach a viscosity plateau. However, the value of the final viscosity differed significantly: homogenised suspensions derived from fines achieved only about 60 % of the viscosity of suspensions derived from pulp. Already after a few homogenisation cycles, no differences between the samples could be measured using optical devices, indicating that fibrillation on the nanometre scale was responsible for the distinct rheological behaviours. Atomic force microscopy measurements indicated significantly reduced fibril lengths for the suspensions derived from fines, which explains their reduced viscosity.

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“…Outros termos genéricos como, celulose microfibrilada (CMF), nanofibras de celulose e nanofibrilas de celulose, por exemplo, têm sido usados para descrever nanoestruturas de celulose com pelo menos uma de suas dimensões em escala nanométri-ca, com diâmetros inferiores a 100 nm e comprimentos de vários micrômetros (STELTE; SEHAQUI et al, 2011;SYVERUD et al, 2011).…”

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Caracterização de nanofilmes de celulose nanofibrilada obtida em diferentes consistências

Potulski¹,

Viana²,

Muniz³

et al. 2016

Sci. For.

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ResumoA celulose nanofibrilada destaca-se por apresentar propriedades físicas e mecânicas singulares, como alta densidade, menor capacidade de absorção de água e elevada resistência a tração e arrebentamento. O objetivo principal deste trabalho foi produzir e avaliar filmes de celulose nanofibrilada obtida pelo processo de desfibrilação mecânica a partir de diferentes consistências. Polpa Kraft de Pinus sp. não branqueada, preparada em diferentes consistências: 0,5%, 1,0% e 1,5% e processadas mecanicamente no moinho desfibrilador Super Masscolloider Masuko Sangyo utilizando 20 passes foi utilizada na obtenção da celulose nanofibrilada. Para visualização das estruturas e dimensões da celulose nanofibrilada foi aplicada a técnica de microscopia eletrônica de transmissão e força atômica. O índice de cristalinidade da celulose nos filmes foi obtido aplicando a técnica de difração de Raios-X. Os filmes previamente acondicionados (T: 23 ± 2 °C e UR: de 50 ± 2%) foram destinados à realização dos ensaios físicos (gramatura, densidade aparente e absorção). Os resultados mostram que os valores dos índices de cristalinidade foram de 69,8; 72,1 e 72,2% para a celulose nanofibrilada obtidas a partir das consistências de 1,0; 0,5 e 1,5%, respectivamente. Os valores de gramatura foram de 56,92 a 63,08 g/m 2 e estão dentro da variação proposta nesse trabalho. A densidade aparente foi igual a 1,22 (C0,5%); 1,35 (C1,0%) e 1,10 g/cm 3 (C1,5%). O ensaio de absorção de água pelo método Cobb não mostrou diferença estatisticamente significativa entre os tratamentos avaliados. A presença de nanofibrilas aumenta a densidade aparente e diminui a absorção de água em filmes nanoestruturados. As diferentes consistências estudadas não influenciaram nas características e propriedades físicas dos filmes.Palavras-chave: nanocelulose, filmes, Pinus, densidade, absorção Cobb. AbstractNanofibrillated cellulose stands out for having remarkable physical and mechanical properties such as high density, lower capacity of water absorption and high tensile and burst resistance. The main objective of this research was to produce and evaluate nanostructured cellulosic films obtained by mechanical defibrillation process from three different consistencies: 0.5%, 1.0% and 1.5%. Undelignified Kraft pulp Pinus sp. prepared in different consistencies were used: 0.5%, 1.0% and 1.5% and processed by mechanical defibrillation in a grinder Super Masscolloider Masuko Sangyo by 20 passes. Transmission Electron Microscopy and Atomic Force was used to visualize the structures and dimensions of the cellulose nanofibers. The cellulosic crystallinity index on the films was obtained by using X-Ray diffraction. The previously conditioned films (T: 23 ± 2 °C e UR: de 50 ± 2%) were destined to achieve physical tests (thickness, grammage, apparent density and absorption). The results show that the values of the crystallinity index was 69.8; 72.1 and 72.2% for nanofibrillated cellulose to 0.5, 1.0 and 1.5 wt%, respectively. The grammage values were from 56.92 to 63.08 g/m², and ...

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A comparative study of Eucalyptus and Pinus radiata pulp fibres as raw materials for production of cellulose nanofibrils

Cited by 146 publications

References 20 publications

Nanofibrillated Cellulose from Appalachian Hardwoods Logging Residues as Template for Antimicrobial Copper

Nanofibrillated Cellulose from Appalachian Hardwoods Logging Residues as Template for Antimicrobial Copper

Morphology and rheology of cellulose nanofibrils derived from mixtures of pulp fibres and papermaking fines

Caracterização de nanofilmes de celulose nanofibrilada obtida em diferentes consistências

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