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Journal articles
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Smart Moisture Measurement Tech Optimizes Quality, Paper360º September/October 2021

Smart Moisture Measurement Tech Optimizes Quality, Paper360º September/October 2021

Journal articles
Magazine articles
Open Access
Colloid chemical aspects of paper formation in the presence of nanofibrillated cellulose and cationic starch, TAPPI Journal September 2024

ABSTRACT: A series of experimental tests were carried out to examine colloidal-scale consequences of optionally treating nanofibrillated cellulose (NFC) with cationic starches of different charge density and dosage (0.5% or 2.0% by weight), adding that material to a furnish prepared from 100% recycled copy paper, and then subjecting the mixture to very different levels of hydrodynamic shear. Tests included optical microscopy, sediment volume tests, sediment velocity tests, and “percent fines” assessment by means of a fiber quality analyzer (FQA). In addition, the zeta potential and charge demand of the studied materials were evaluated. Optical imaging revealed that cationic starch treatment of the NFC tended to agglomerate it into multiparticle clusters, which sometimes could be mostly redispersed by hydrodynamic shear. Subsequent addition of the starch-treated NFC to the default furnish resulted in much of the colloidal material becoming attached to fibers. Subsequent shearing of the mixtures was at least partly effective in separating the clusters of NFC from the fiber surface, resulting in essentially a two-component mixture. Multiparticle NFC clusters coexisted with the fiber suspension, sometimes attached and sometimes not, depending on the details of treatments. Sediment volume tests showed that systems containing cationic starch-treated NFC tended to have a higher density after settling in comparison to untreated NFC; these findings are consistent with the cationic starch acting as a stabilizer on the solid surfaces, allowing them to slide past each other during the settling process. Application of intense hydrodynamic shear tended to result in denser sediment. Results of tests with the sediment velocity messurement and the FQA percent fines assessment did not correlate well with changes in test conditions considered in this study.

Journal articles
Magazine articles
Best Practices for Wastewater Treatment and Management, Pape

Best Practices for Wastewater Treatment and Management, Paper360º November/December 2016

Journal articles
Magazine articles
TAPPI JOURNAL Summaries, Paper360º November/December 2017

TAPPI JOURNAL Summaries, Paper360º November/December 2017

Journal articles
Magazine articles
Recycling at Paper Mills: The Benefits of Water-Based Barrier Coatings, Paper360º January/February 2021

Recycling at Paper Mills: The Benefits of Water-Based Barrier Coatings, Paper360º January/February 2021

Journal articles
Magazine articles
The Paper360° TOP 100, Paper360º September/October

The Paper360° TOP 100, Paper360º September/October

Journal articles
Magazine articles
Partnership Yields Results at Wuhan Golden Phoenix Paper, Paper360º November/December 2018

Partnership Yields Results at Wuhan Golden Phoenix Paper, Paper360º November/December 2018

Journal articles
Magazine articles
Chemicals Play Key Role in Food Packaging, Paper360º January/February 2020

Chemicals Play Key Role in Food Packaging, Paper360º January/February 2020