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Effects of orders of addition in nanocellulose•cationic starch• colloidal silica systems for papermaking, TAPPI Journal October 2022

ABSTRACT: Two orders of addition were compared when preparing paper handsheets from recycled copy paper furnish in combination with nanofibrillated cellulose (NFC), cationic starch, colloidal silica, and cationic retention aid (cPAM; cationic polyacrylamide). Faster dewatering and higher fine-particle retention were obtained at equal optimized dosages of additives when the colloidal silica was added last, after addition of the cPAM. The same order of addition also provided a higher gain in the paper’s tensile strength. However, higher paper stiffness was achieved when the colloidal silica was instead added to the NFC, after its pretreatment with cationic starch. Results were consistent with the principle that papermaking additives added shortly before sheetforming tend to have the largest effects on drainage and retention. The results also demonstrated a sensitivity to the relative dosages of positively and negatively charged additives.

Journal articles
Open Access
Performance of High Vacuum Dewatering Elements in the Formin

Performance of High Vacuum Dewatering Elements in the Forming Section, 1993 Engineering Conference Proceedings

Journal articles
Open Access
Cold Blow Batch Cooking Plus Medium Consistency Oxygen: Heat

Cold Blow Batch Cooking Plus Medium Consistency Oxygen: Heat Exchanger Placement, 1993 Engineering Conference Proceedings

Journal articles
Open Access
Hydrodynamics of the Forming Section: The Origin of Nonunifo

Hydrodynamics of the Forming Section: The Origin of Nonuniform Fiber Orientation, 1994 Engineering Conference Proceedings

Journal articles
Open Access
Machine Vision Applications Using Binary and Grayscale Morph

Machine Vision Applications Using Binary and Grayscale Morphology, 1994 Engineering Conference Proceedings

Journal articles
Open Access
Model to Predict the Precipitation of Burkeite in the Multip

Model to Predict the Precipitation of Burkeite in the Multiple Effect Evaporator and Techniques for Controlling Scaling, 1995 Engineering Conference Proceedings

Journal articles
Open Access
Liquor-To-Liquor Differences in Combustion and Gasification

Liquor-To-Liquor Differences in Combustion and Gasification Processes: Nitrogen Oxide Formation Tendency, 1995 Engineering Conference Proceedings

Journal articles
Open Access
Thermal stability of paper fillers: a strong case for a low temperature paper ashing, TAPPI JOURNAL, March 1996, Vol. 79(3)

Thermal stability of paper fillers: a strong case for a low temperature paper ashing, TAPPI JOURNAL, March 1996, Vol. 79(3)

Journal articles
Open Access
Effect of basestock formation on paper coating, TAPPI JOURNAL, May 1996, Vol. 79(5)

Effect of basestock formation on paper coating, TAPPI JOURNAL, May 1996, Vol. 79(5)

Journal articles
Open Access
Consolidation of pigmented coatings: development of porous structure, TAPPI JOURNAL, May 1996, Vol. 79(5)

Consolidation of pigmented coatings: development of porous structure, TAPPI JOURNAL, May 1996, Vol. 79(5)

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