Cellulose nanopapers as tight aqueous ultra-filtration membranes

Mautner, Andreas; Lee, Koon‐Yang; Tammelin, Tekla; Mathew, Aji P.; Nedoma, Alisyn J.; Li, Kang; Bismarck, Alexander

doi:10.1016/j.reactfunctpolym.2014.09.014

Cited by 168 publications

(125 citation statements)

References 33 publications

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“…From phosphorylated CNF-P, nanopapers intended for the continuous capture of copper ions via an ion-exchange mechanism were prepared using a papermaking process (Mautner et al 2014(Mautner et al , 2015. The grammage of CNF-P nanopapers was set to 25 g m -2 (gsm), corresponding to a thickness of 25 lm.…”

Section: Phosphorylated Cnf Nanopapersmentioning

confidence: 99%

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Phosphorylated nanocellulose papers for copper adsorption from aqueous solutions

Mautner

Maples

Kobkeatthawin

et al. 2016

Int. J. Environ. Sci. Technol.

118

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Copper is a major problem in industrial wastewater streams, seriously affecting the quality of potential drinking water. Several approaches, including continuous membrane processes or batch-wise application of adsorbents, are in use to tackle this problem. Unfortunately, these processes suffer from their particular drawbacks, such as low permeance or disposal of saturated adsorbents. However, a combination of these processes could constitute a step towards a more efficient copper removal solution. Here, we present a nanopaper ion-exchanger prepared from cellulose nanofibrils produced from fibre sludge, a paper industry waste stream, for the efficient, continuous removal of copper from aqueous solutions. This nanopaper ion-exchanger comprises phosphorylated cellulose nanofibrils that were processed into nanopapers by papermaking. The performance of these phosphorylated nanopaper membranes was determined with respect to their rejection of copper and permeance. It was shown that this new type of nanopaper is capable of rejecting copper ions during a filtration process by adsorption. Results suggest that functional groups on the surface of the nanopapers contribute to the adsorption of copper ions to a greater extent than phosphate groups within the bulk of the nanopaper. Moreover, we demonstrated that those nanopaper ion-exchangers could be regenerated and reused and that in the presence of calcium ions, the adsorption capacity for copper was only slightly reduced.

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Section: Phosphorylated Cnf Nanopapersmentioning

confidence: 99%

“…Such nanopapers can be used as tight aqueous ultrafiltration or organic solvent nanofiltration membranes (Mautner et al 2014(Mautner et al , 2015. However, the permeance of these membranes was still relatively low and pores too large for the removal of (copper) ions.…”

Section: Introductionmentioning

confidence: 99%

Phosphorylated nanocellulose papers for copper adsorption from aqueous solutions

Mautner

Maples

Kobkeatthawin

et al. 2016

Int. J. Environ. Sci. Technol.

118

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“…Extensive mixing was used to ensure homogeneous distribution of WSPS in the CNF suspension. Nanopapers with grammages of 60 g m -2 were produced from CNF with and without 2 wt% of GGM or OGG, respectively, and from BC (50 g m -2 ) using a simple papermaking process (Mautner et al 2015). The final thickness of the nanopapers was 60 ± 5 lm for (modified) CNF and 50 ± 5 lm for BC nanopapers.…”

Section: Resultsmentioning

confidence: 99%

“…CNF-nanopapers with grammages of 60 g m -2 were prepared. Nanopapers from BC were prepared as previously reported (Mautner et al 2015;Lee et al 2012c). Briefly, the BC pellicles were first cut into small pieces (with a length of approximately 5-10 mm) and blended (Breville VBL065-01, Oldham, UK) for 2 min at a consistency of 0.2 wt% in deionized water to produce a homogeneous suspension of BC-in-water.…”

Section: Nanopaper Preparationmentioning

confidence: 99%

“…They were utilized for a wide range of applications (Klemm et al 2011), such as membranes (Mautner et al 2014(Mautner et al , 2015, flame-retardant and fireprotection applications (Carosio et al 2015(Carosio et al , 2016Liu and Berglund 2013) and in particular for the production of composites (Blaker et al 2011;Lee et al 2009Lee et al , 2012bLee et al c, 2014bNogi and Yano 2008;Lee and Bismarck 2012;Eichhorn et al 2010;Pommet et al 2008;Wan et al 2006). Accordingly, numerous approaches to utilize CNF in composites have been proposed and tested.…”

Section: Introductionmentioning

confidence: 99%

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Multi-layer nanopaper based composites

et al. 2017

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Native cellulose nanofibrils (CNF) were prepared from bleached birch pulp without any chemical or enzymatic pretreatment. These CNF were modified by adsorption of a small amount of watersoluble polysaccharides and used to prepare nanopapers, which were processed into composites by lamination with an epoxy resin and subsequently cured. The results were compared to the properties of composites prepared using bacterial cellulose nanopapers, since bacterial cellulose constitutes highly pure and crystalline cellulose. It was found that both types of nanopapers significantly improved both the thermal stability and mechanical properties of the epoxy resin. As anticipated, addition of only 2 wt% of watersoluble polysaccharides efficiently hindered crackpropagation within the nanopaper and significantly improved the tensile strength and work of fracture compared to composites containing a conventional nanopaper reinforcement. The mechanical properties of the composites thus reflected the improvement of the nanopaper properties by the polysaccharides. Moreover, it was possible to predict the properties of the final composite from the mechanical performance of the nanopapers.

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Improving the Sustainability of Biobased Products Using Nanotechnology

Marques

Kumar

2022

Sustainable Nanotechnology

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Cellulose nanopapers as tight aqueous ultra-filtration membranes

Cited by 168 publications

References 33 publications

Phosphorylated nanocellulose papers for copper adsorption from aqueous solutions

Phosphorylated nanocellulose papers for copper adsorption from aqueous solutions

Multi-layer nanopaper based composites

Improving the Sustainability of Biobased Products Using Nanotechnology

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