Adsorption of surfactant-rich stickies onto mineral surfaces

作者：Gribble Christopher M; Matthews G Peter^*; Gantenbein Daniel; Turner Andrew; Schoelkopf Joachim; Gane Patrick A C

来源：Journal of Colloid and Interface Science, 2010, 352(2): 483-490.

DOI：10.1016/j.jcis.2010.07.062

• Adsorption
• Calcium carbonate
• Paper recycling
• Stickies
• Talc

Stickies are tacky species present in recycled paper and coated broke derived from coating formulations adhesives etc They impact negatively on paper quality and cause web runnability problems by deposit build up To sustain recycling suckles are controlled by adsorbing them onto minerals added to the recycled stock We report isotherms for a fatty acid ester defoamer and an acrylic acid ester copolymer adsorbing from colloidal suspension onto various talcs and modified calcium carbonates We used commercial preparations of the fatty acid ester defoamer and acrylic acid ester copolymer to provide a simple analogue to the industrial process The modified calcium carbonates are hydrophilic with anionic and cationic sites present Adsorption Isotherms for low surface area modified calcium carbonate conform to the Langmuir model while those for high surface area modified calcium carbonate reflect a two stage process involving the formation of a monolayer over the mineral surface and subsequent partial aggregation Talc platelets display hydrophilic edges and hydrophobic surfaces Adsorption onto them appears to Involve three stages specifically a hydrophilic interaction between hydrophili

• 出版日期2010-12-15