Mechanistic insights into the formation of polyion complex aggregates from cationic thermoresponsive diblock copolymers

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:590

Article

Read, E.¹  Lonetti, B.¹  Gineste, S.¹  Sutton, A. T.^2,3  Cola, E. Di⁴  Castignolles, P.²  Gaborieau, M.²  Mingotaud, A. -F.¹  Destarac, M.¹  Marty, J. -D.¹ 

[1] Univ Paul Sabatier, CNRS, UMR 5623, Lab IMRCP, 118 Route Narbonne, F-31062 Toulouse 9, France

[2] Western Sydney Univ, ACROSS, Sch Sci, Locked Bag 1797, Penrith, NSW 2751, Australia

[3] Univ South Australia, Future Ind Inst, POB 2471, Adelaide, SA 5001, Australia

[4] SAS Anal, St Egreve, France

关键词: Double hydrophilic block copolymers;    Polyion complexes;    Thermoresponsive polymers;    Nuclear magnetic resonance spectroscopy;   

DOI  :  10.1016/j.jcis.2021.01.028

来源: Elsevier

【 摘 要 】

Hypothesis: The formation of polyion complexes (PICs) comprising thermoresponsive polymers is intended to result in the formation of aggregates that undergo significant structural changes with temperature. Moreover the observed modifications might be critically affected by polymer structure and PICs composition. Experiments: Different block copolymers based on cationic poly(3-acrylamidopropyltrimethylammo nium chloride) and thermoresponsive poly(N-isopropylacrylamide) were synthesized by aqueous RAFT/MADIX polymerization at room temperature. Addition of poly(acrylic acid) in a controlled fashion led to the formation of PICs aggregates. The structural changes induced by temperature were characterized by differential scanning calorimetry, Nuclear Magnetic Resonance spectroscopy and scattering methods.

【 授权许可】

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