Search

What is Our Industry’s Most Critical Workforce Need?, Paper360º March/April 2021

What is Our Industry’s Most Critical Workforce Need?, Paper360º March/April 2021

Li-ion Batteries are Making a Roar, Paper360º May/June 2021Li-ion Batteries are Making a Roar, Paper360º May/June 2021

Li-ion Batteries are Making a Roar, Paper360º May/June 2021

Uruguay Prepares to Open a Gateway to the World, Paper360º July/August 2021

Uruguay Prepares to Open a Gateway to the World, Paper360º July/August 2021

TAPPI News,Paper360º July/August 2021

TAPPI News,Paper360º July/August 2021

Mechanistic aspects of nanocellulose•cationic starch•colloidal silica systems for papermaking, TAPPI Journal February 2023

ABSTRACT: Optimization of a chemical additive program for a paper machine can require attention to both colloidal charges and kinetic effects. This work considered an additive program with two negatively charged substances (nanofibrillated cellulose [NFC] and colloidal silica) and two positively charged items (cationic starch and cationic acrylamide copolymer retention aid). Results were shown to depend on charge interactions; however, that clearly was not the whole story. Some findings related to cationic demand, dewatering, fine-particle retention, and flocculation among fibers were best explained in terms of at least partly irreversible complexation interactions between the charged entities. Adjustments in ratios between oppositely charged additives, their sequences of addition, and effects of hydrodynamic shear levels all affected the results. In general, the most promising results were obtained at a cationic starch level of 0.25% to 0.5% based on sheet solids in systems where the cationic starch was used as a pretreatment for NFC.

Small Jobs in Maintenance, Paper360º March/April 2023

FBB vs SBS: What Will Demand Look Like in the Next 5 Years?, Paper360º March/April 2023

Case Study: Micro-filters Boost Efficiency, Reliability, Paper360º July/August 2022

Managing Caliper: A Unique Business Model for Corrugated, Paper360º July/August 2022

Over The Wire, Paper360º July/August 2022