The role of MFC/NFC swelling in the rheological behavior and dewatering of high consistency furnishes

Dimić-Mišić, Katarina; Puisto, Antti; Gane, Patrick; Nieminen, Kaarlo; Alava, Mikko J.; Paltakari, Jouni; Maloney, Thaddeus

doi:10.1007/s10570-013-0076-3

Cited by 76 publications

(79 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As expected, the furnish with higher consistency exhibited higher dynamic viscosity throughout the shear range. The shear thinning behavior for both consistencies indicate that the structure was broken as more shear was applied, which is typical for MFC containing furnishes (Lasseuguette et al 2008;Iotti et al 2011;Karppinen et al 2011;Saarikoski et al 2012;Dimic-Misic et al 2013b). This result shows the potential of tuning the viscosity by applying shear to the furnish, which is relevant for any pumping or mixing operations in a manufacturing process.…”

Section: Steady-state Flow Curvesmentioning

confidence: 69%

Forming and Dewatering of a Microfibrillated Cellulose Composite Paper

et al. 2015

Self Cite

View full text Add to dashboard Cite

An approach is demonstrated for the manufacturing of a microfibrillated cellulose (MFC) composite paper. A key element in the manufacturing paradigm is the use of high consistency suspensions to improve retention and minimize the need for water removal after forming. The rheological characterization of the composite furnish, which contained 70% structured pigment, 20% MFC, and 10% pulp fibers, revealed a gel-like shear thinning behavior of the suspension, which differs greatly from traditional fiber-based papermaking furnishes. The results from laboratory and pilot scale studies show that the headbox consistency range from 5 to 10% offers the best combination of processing, forming characteristics, retention, and dewatering. While the furnish dewatering in laboratory scale was very problematic, under suitable dynamic conditions the wire section dewatering was excellent. The results of this study suggest that the MFC composite can be manufactured on a modified paper machine and that the final product will have an attractive cost structure.

show abstract

Section: Steady-state Flow Curvesmentioning

confidence: 69%

Forming and Dewatering of a Microfibrillated Cellulose Composite Paper

et al. 2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…Specifically, in the absence of NCC, Scheme 1 Schematic illustration of surface coating of MWCNT/GO nanocomposites to produce highly electro-conductive cellulosic paper MWCNT/GO nanocomposites exhibited a viscosity of 1,040 mPa s at 100 rpm, at 4.0 wt% of NCC, the viscosity increased to 1,220 mPa s, and further to 1,490, 1,640 mPa s at 6.0, 8.0 wt% of NCC, respectively, implying that NCC acted as an effective thickening agent in these MWCNT/GO nanocomposites. The increased viscosity of MWCNT/GO nanocomposites as a function of increased NCC concentration may be explained by the fact that NCC interacted strongly with water because of its inherent high polarity and large surface area, acting to form a highly entangled network exhibiting its wellknown gel-like behavior, therefore leading to the increased resistance to flow (Dimic-Misic et al 2013;Mohtaschemi et al 2014). It was noted that the MWCNT/GO nanocomposites possessed a viscosity of 2,120 mPa s at 12.0 wt% of NCC.…”

Section: Resultsmentioning

confidence: 99%

Production of highly electro-conductive cellulosic paper via surface coating of carbon nanotube/graphene oxide nanocomposites using nanocrystalline cellulose as a binder

Tang

Mosseler

et al. 2014

Cellulose

View full text Add to dashboard Cite

Electro-conductive cellulosic paper has attracted great attention as a promising alternative material in the emerging field of flexible and portable electronic devices. However, the environmentally friendly fabrication of electro-conductive cellulosic paper still remains challenging. Herein, green multiwalled carbon nanotube (MWCNT)/graphene oxide (GO) nanocomposites towards the sustainable development strategy were developed and subsequently used to impart electro-conductivity to cellulosic paper via surface coating process. GO exfoliated from graphite powder was used as a dispersant to improve the dispersion of MWCNTs in water media, and nanocrystalline cellulose (NCC) derived from cotton fibers was employed as a binder for the MWCNT/GO nanocomposites. Effect of NCC amount on the rheological behavior, particle size distribution, sedimentation stability and zeta potential of MWCNT/GO nanocomposites as well as the electro-conductivity and mechanical properties of coated paper was investigated. Results demonstrated that NCC enhanced the dispersion of MWCNT/GO nanocomposites in addition to serving as a binder. Surface coating application of MWCNT/GO nanocomposites was found to impart high electro-conductivity of up to 892 S m -1 to the cellulosic paper while improving its mechanical properties.

show abstract

“…18 appear reasonable. NFC has the highest swelling, followed by MFC and BHW [14]. For the sample of BHW, the PSD in Fig.…”

Section: Measurement Of Cellulosic Materialsmentioning

confidence: 93%

“…The porous structure of cellulose is extremely important in many processing and end use applications. This includes enzymatic hydrolysis [11], chemical modification [12], fiber swelling [13], and rheology [14]. Of particular interest today is an emerging class of ''nanocelluloses'' [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Thermoporosimetry of hard (silica) and soft (cellulosic) materials by isothermal step melting

Maloney

2015

J Therm Anal Calorim

View full text Add to dashboard Cite

In this study, the pore size distribution of silica aerogels is measured with thermoporosimetry and compared with results from cellulosic materials. The isothermal step melting method is shown to be a useful method to eliminate thermal lag and measures relatively large pores which have a small melting temperature depression. It is shown that for porous silica, pore volumes can be accurately measured by isothermal step melting and that pore diameter can be calculated from the Gibbs-Thomson equation. The nonfreezing water is found to be a monolayer on the pore wall, indicating that hydrated surface area may be probed with this method. The isothermal step melting method is also shown to be very useful to measure pore size distribution of cellulosic materials. However, the Gibbs-Thomson constant for cellulosic materials is markedly different than for porous silica. The pore size distribution for Kraft pulp fibers and for two types of nanocellulose is reported.

show abstract

The role of MFC/NFC swelling in the rheological behavior and dewatering of high consistency furnishes

Cited by 76 publications

References 40 publications

Forming and Dewatering of a Microfibrillated Cellulose Composite Paper

Forming and Dewatering of a Microfibrillated Cellulose Composite Paper

Production of highly electro-conductive cellulosic paper via surface coating of carbon nanotube/graphene oxide nanocomposites using nanocrystalline cellulose as a binder

Thermoporosimetry of hard (silica) and soft (cellulosic) materials by isothermal step melting

Contact Info

Product

Resources

About