Abstract
The effect of cationic polyethylenimine (PEI) on colloidal stability of ground calcium carbonate and its deposition on pulp fibres suspended in water was investigated. The adsorption of PEI on negatively charged CaCO 3 particles causes destabilization due to the elimination of charge. With increasing additions of PEI, restabilization of positively charged CaCO 3 takes place. Based upon these results the filler was pretreated with PEI in order to encourage its deposition on negatively charged fibres. Two levels of PEI addition were used to produce either CaCO 3 aggregates or dispersed particles. The extent of deposition, the deposition time τ, and the capture efficiency α 0 were established. The results indicate that positively charged filler aggregates deposit faster than dispersed particles. Alternatively, the fibres were treated with two levels of PEI, the same as that used for CaCO 3 treatment, and the deposition of CaCO 3 was observed. The deposition efficiency in this case was lower.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Colloids and Surfaces A: Physicochemical and Engineering Aspects
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
