Journal of Colloid and Interface Science 461 (2016) 346–351 Contents lists available at ScienceDirect Journal of Colloid and Interface Science journal homepage: www.elsevier.com/locate/jcis Steric stabilization of modiﬁed nanoclays triggered by temperature Giuseppe Cavallaro, Giuseppe Lazzara , Stefana Milioto, Filippo Parisi Department of Physics and Chemistry, Università degli Studi di Palermo, Viale delle Scienze, pad. 17, 90128 Palermo, Italy graphical a bstract HNT aer 800 min at 45 °C aer srring aer 800 min at 15 °C 45 °C 15 °C HNT/PNIPAAM ar ti c l e i nf o ab stra ct Article history: Halloysite clay nanotubes were modiﬁed through the adsorption of poly(N-isopropylacrylamide)-amine Received 30 July 2015 terminated (PNIPA-NH ) onto the external surface by exploiting electrostatic interactions at pH = 6. In Revised 4 September 2015 spite the amount of attached polymer is rather low (1 wt%), the properties of the nanotubes are deeply Accepted 19 September 2015 modiﬁed. The apparent speciﬁc volume and isentropic compressibilities of the hybrid nanomaterial dis- Available online 21 September 2015 persed in water evidenced the transferring of the termosensitive property from the polymer to halloysite. The hydrodynamic radius as well as the f-potential of the nanohybrid are consistent with the attachment
Journal of Colloid and Interface Science – Elsevier
Published: Jan 1, 2016
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