Effect of cationic polyacrylamide on the processing and properties of nanocellulose films

Raj, Praveena; Varanasi, Swambabu; Batchelor, Warren; Garnier, Gil

doi:10.1016/j.jcis.2015.01.019

Cited by 39 publications

(16 citation statements)

References 37 publications

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“…The supernatant of PAE in a MFC suspension was analyzed after centrifugation according to the reported work of Garnier et al . 57 . …”

Section: Resultsmentioning

confidence: 99%

“…Assuming MFC to be uniform cylinders of 10.37 μm long and of average diameter 73 nm 56 , the specific surface area of MFC is 36.5 m 2 /g. The surface area reported for MFC characterized through mercury porosimetry and BET are 31.1 m 2 /g 57 and 35 m 2 /g 58 , respectively. A specific PAE adsorption of 0.41 mg/m 2 results for MFC which is consistent with the range of polyelectrolyte adsorption (0.4–1 mg/m 2 ) 59 .…”

Section: Discussionmentioning

confidence: 99%

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Water Resistant Cellulose – Titanium Dioxide Composites for Photocatalysis

Garusinghe

Raghuwanshi

Batchelor

et al. 2018

Sci Rep

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Novel water resistant photocatalytic composites of microfibrillated cellulose (MFC)—polyamide-amine-epichlorohydrin (PAE)—TiO2 nanoparticles (NPs) were prepared by a simple two-step mixing process. The composites produced are flexible, uniform, reproducible and reusable; they can readily be removed from the pollutant once used. Small amount of TiO2 NPs are required for the loaded composites to exhibit a remarkable photocatalytic activity which is quantified here as achieving at least 95% of methyl orange degradation under 150 min of UV light irradiation for the composite with best combination. The cellulose network combined with PAE strongly retains NPs and hinders their release in the environment. PAE dosage (10 and 50 mg/g MFC) controls the NP retention in the cellulose fibrous matrix. As TiO2 content increases, the photocatalytic activity of the composites levels off to a constant; this is reached at 2wt% TiO2 NPs for 10 mg/g PAE and 20wt% for 50 mg/g PAE. SEM and SAXS analysis confirms the uniform distribution of NPs and their formation of aggregates in the cellulose fibre network. These economical and water resistant photocatalytic paper composites made by a simple, robust and easily scalable process are ideal for applications such as waste water treatment where efficiency, reusability and recyclability are important.

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“…The supernatant of PAE in a MFC suspension was analyzed after centrifugation according to the reported work of Garnier et al . 57 . …”

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Water Resistant Cellulose – Titanium Dioxide Composites for Photocatalysis

Garusinghe

Raghuwanshi

Batchelor

et al. 2018

Sci Rep

Self Cite

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“…However, they tend to form hydrogels by hydrogen bonding between the nanofibrils, quite stable and strong enough to hinder their homogeneous dispersion and difficult to mix within the furnish. In this way, some fibrils clusters are present even despite the fact that they apparently seem to be a homogeneous suspension, so their reinforcing efficiency is still less than the one expected [86,87]. Moreover, these clusters decrease the light scattering coefficient and thus opacity of the sheet.…”

Section: Dispersion Of Nanocellulosesmentioning

confidence: 92%

“…Another important parameter is NC dispersion. Some researchers have studied the effect of the NC mixing with the pulps on the mechanical paper properties [89] or the use of dispersant agents to improve the NC dispersion in a polymeric matrix [87,137,140,142]. However, there is no methodology to quantify the dispersion of the NC hydrogels in a water suspension before its application yet, although it may have a big influence on NC.…”

Section: Dimensions and Structurementioning

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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“…The maximum layer thickness would be that of CPAM coils adsorbed from solution onto a cellulose surface. This layer was 4.3 nm as measured by neutron reflectometry at the cellulose-liquid interface (CPAM 40% charge, MW 13 MDa) [26]; for comparison the calculated radius of gyration (r g ) is 18.9 nm [26], and an IgM has a diameter of a 30 nm [27].…”

Section: Cpam As Biomolecule and Cell Retention Aidmentioning

confidence: 99%