Influence of TEMPO-oxidised cellulose nanofibrils on the properties of filler-containing papers

Lourenço, Ana F.; Gamelas, José A. F.; Nunes, Tiago; Amaral, José L.; Mutjé, Pere; Ferreira, Paulo J.

doi:10.1007/s10570-016-1121-9

Cited by 57 publications

(43 citation statements)

References 36 publications

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“…Recent studies have investigated the effects of pulp source (Tanaka et al 2016), fibril dimension and concentration (Agoda-Tandjawa et al 2010), mechanical treatments (Pääkkö et al 2007), ionic strength (Dong et al 2013), pH (Fall et al 2013), as well as addition of amphiphilic molecules (Quennouz et al 2016) on the rheology of CNF dispersions. Additionally, CNFs can also assist in preparation of homogeneous dispersions of a variety of fillers and pigments, such as carbon nanotubes (Hamedi et al 2014), reduced graphene oxide (Duan et al 2016), TiO 2 (Schütz et al 2012), and CaCO 3 (Lourenço et al 2016) nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Steady-shear and viscoelastic properties of cellulose nanofibril–nanoclay dispersions

2017

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We have investigated the steady-shear and viscoelastic properties of composite dispersions of cellulose nanofibrils (CNFs) with medium or high charge density and two different nanoclays, viz. rodlike sepiolite or plate-like bentonite. Aqueous dispersions of CNFs with medium charge density displayed significantly lower steady-state viscosity and storage modulus but higher gelation threshold compared with CNFs with high charge density. Dynamic light scattering (DLS) results showed that the apparent hydrodynamic radius of bentonite particles increased when CNFs were added, implying that CNFs adsorbed onto the amphoteric edges of the plate-like bentonite particles. The sepiolite network in CNF-sepiolite dispersions was relatively unaffected by addition of small amounts of CNFs, and DLS showed that the hydrodynamic radius of sepiolite did not change when CNFs were added. Addition of CNFs at concentrations above the gelation threshold resulted in drastic decrease of the steady-shear viscosity of the sepiolite dispersion, suggesting that the sepiolite network disintegrates and the rod-like clay particles are aligned also at low shear rate. The relative change in the rheological properties of the clay-based dispersions was always greater on addition of CNFs with high compared with medium charge density. This study provides insight into how the rheology of CNFnanoclay dispersions depends on both the nanoclay morphology and the interactions between the nanoclay and nanocellulose particles, being of relevance to processing of nanocellulose-clay composites.

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Section: Introductionmentioning

confidence: 99%

Steady-shear and viscoelastic properties of cellulose nanofibril–nanoclay dispersions

2017

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“…The microparticle is usually anionic bentonite or microsilica. Recently, several authors have observed that the use of CNF as a microparticle, in combination with a polyelectrolyte, such as polyacrylamide (PAM), improves the retention of fillers and the mechanical properties without a detrimental effect on drainage (Table 1) [35,41,57]. Petroudy et al [58] showed that it is possible to achieve a high tensile index (TI) increment by combining CNF and cationic PAM (CPAM) without increasing the drainage time.…”

Section: Wet-end Optimizationmentioning

confidence: 99%

“…Moreover, with the use of chitosan and 1 wt% CNF, the drainage rate was increased by 50% and the paper sheets achieved a TI improvement of 16% and 14% when CNF are from bleached Eucalyptus Kraft pulp and corn stalk organosolv pulp, respectively. Lourenço et al [57] found that the oxidation degree of CNF was closed related to their effect on filler retention. The excess of oxidation led to a CNF with too high carboxylic content and too low polymerization degree with low filler flocculation ability and with high affinity to CPAM, forming CPAM-CNF bundles that were not able to attach the filler to the fibers.…”

Section: Wet-end Optimizationmentioning

confidence: 99%

Industrial Application of Nanocelluloses in Papermaking: A Review of Challenges, Technical Solutions, and Market Perspectives

et al. 2020

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Nanocelluloses (NC) increase mechanical and barrier paper properties allowing the use of paper in applications actually covered by other materials. Despite the exponential increase of information, NC have not been fully implemented in papermaking yet, due to the challenges of using NC. This paper provides a review of the main new findings and emerging possibilities in this field by focusing mainly on: (i) Decoupling the effects of NC on wet-end and paper properties by using synergies with retention aids, chemical modification, or filler preflocculation; (ii) challenges and solutions related to the incorporation of NC in the pulp suspension and its effects on barrier properties; and (iii) characterization needs of NC at an industrial scale. The paper also includes the market perspectives. It is concluded that to solve these challenges specific solutions are required for each paper product and process, being the wet-end optimization the key to decouple NC effects on drainage and paper properties. Furthermore, the effect of NC on recyclability must also be taken into account to reach a compromise solution. This review helps readers find upscale options for using NC in papermaking and identify further research needs within this field.

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“…Diatomite (DM) is a low‐cost, environmentally friendly, and natural microstructured/nanostructured material derived from sedimentary silica. It has cylindrical and plate morphologies with well‐developed mesoporous and/or macroporous structures . The highly developed pore structure, low density, and high surface area of DM results in it having a number of industrial applications, including as filtration media for various inorganic and organic chemicals and absorbents …”

Section: Introductionmentioning

confidence: 99%

“…They may have a negative impact on the effectiveness of cationic additives and may be unable to firmly anchor anionic trash onto pulp fibers. Nowadays, there have been plenty of studies on the application of ATCs in anionic trash elimination . However, the use of ATCs to modify the DM surface and the application of the modified product to the papermaking process have not been reported.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a modified diatomite filler via polyethyleneimine impregnation and its application in papermaking

Shang

Qian

2018

J of Applied Polymer Sci

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In this study, we sequentially modified diatomite (DM) particles with sodium dodecyl sulfate and polyethyleneimine with an impregnation method. Modified DM was used as both a filler and an anionic trash catcher in the papermaking process. The surface morphology, f potential, particle size, and Fourier transform infrared spectrum of the modified DM were investigated, and the application performance of the modified DM was evaluated through filler retention, f potential, drainability, and cationic demand of the papermaking furnish and the paper strength properties. The results show that the modified DM could be used as a good, novel filler in papermaking. The f potential of the surface of the modified DM particles was changed from electronegative to electropositive, and the particle size of the modified DM particles was increased. The retention of the modified DM filler was 16% higher than that of the unmodified DM when the filler dosage was 40%. The higher f potential was responsible for the higher retention of the modified DM filler. The drainability of the papermaking furnish was improved efficiently. The anionic trash in the papermaking system was anchored efficiently, and the cationic demand of the papermaking furnish decreased over 85% when the dosage of modified DM was 35%. Compared with the handsheets filled with unmodified DM, the handsheets filled with modified DM had higher strength properties.

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Influence of TEMPO-oxidised cellulose nanofibrils on the properties of filler-containing papers

Abstract: 18In this work, cellulose nanofibrils (CNF) were produced from a Eucalyptus globulus bleached

Cited by 57 publications

References 36 publications

Steady-shear and viscoelastic properties of cellulose nanofibril–nanoclay dispersions

Steady-shear and viscoelastic properties of cellulose nanofibril–nanoclay dispersions

Industrial Application of Nanocelluloses in Papermaking: A Review of Challenges, Technical Solutions, and Market Perspectives

Preparation of a modified diatomite filler via polyethyleneimine impregnation and its application in papermaking

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