Microfibrilated cellulose as a model for soft colloid flocculation with polyelectrolytes

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• 作者：Praveena Raj^a ; ^b ; Angeles Blanco^a ; ^b ; ^{ablanco@ucm.es} ; Elena de la Fuente^a ; ^b ; Warren Batchelor^a ; ^b ; Carlos Negro^a ; ^b ; Gil Garnier^a ; ^b ; ^{gil.garnier@monash.edu}
• 关键词：Microfibrillated cellulose (MFC) ; Flocculation mechanism ; Polyelectrolyte ; Charge density ; Adsorption ; Bridging ; Charge reversion ; CPAM ; PEI ; PolyDADMAC
• 刊名：Colloids and Surfaces A: Physicochemical and Engineering Aspects
• 出版年：2017
• 出版时间：5 March 2017
• 年：2017
• 卷：516
• 期：Complete
• 页码：325-335
• 全文大小：2171 K
• 卷排序：516

文摘

The effect of polyelectrolyte morphology, charge, Mw and concentration on flocculation of cellulose nanofiber suspension was studied. Polyelectrolyte maximum surface coverage scale inversely to polymer charge density and is independent of polymer Mw and morphology. Properties of soft colloids flocs (size, strength, reformation) can be controlled by the polyelectrolyte charge density and concentration. 


Soft colloids flocs properties and reflocculation ability are analysed for specific industrial applications.