TY - JOUR
T1 - Schizophrenic micelles of poly(3-(methacryloylamino)propyltrimethylammonium chloride-b-2-(dimethylamino)ethyl methacrylate) in aqueous solutions
AU - Kawauchi, Yumi
AU - Kouka, Aya
AU - Guragain, Sudhina
AU - Bastakoti, Bishnu P
AU - Yusa, Shin-ichi
AU - Nakashima, Kenichi
PY - 2013/10/5
Y1 - 2013/10/5
N2 - Micelles of poly(3-(methacryloylamino)propyltrimethylammonium chloride-. b-2-(N,. N-dimethylamino)ethyl methacrylate) (PMAPTAC-. b-PDMAEMA), a double hydrophilic block copolymer, have been prepared in aqueous solution by insolubilizing one of the blocks with external stimuli. PMAPTAC-core micelles were formed by addition of sodium dodecyl sulfate (SDS) to insolubilize the PMAPTAC block. On the other hand, PDMAEMA-core micelles were formed by increasing temperature at higher pH. It was revealed that these two types of the micelles can be reversibly converted to each other. The PMAPTAC/SDS-core micelles were collapsed to the unimers by removing SDS with anion exchange resin, followed by increase in temperature to form the PDMAEMA-core micelles. The PDMAEMA-core micelles were destructed to the unimers by decreasing temperature, followed by addition of SDS to form the PMAPTAC/SDS-core micelle. The micelle properties were extensively investigated by dynamic light scattering, scanning electron microscopy, ζ-potential, and turbidity measurements. © 2013 Elsevier B.V.
AB - Micelles of poly(3-(methacryloylamino)propyltrimethylammonium chloride-. b-2-(N,. N-dimethylamino)ethyl methacrylate) (PMAPTAC-. b-PDMAEMA), a double hydrophilic block copolymer, have been prepared in aqueous solution by insolubilizing one of the blocks with external stimuli. PMAPTAC-core micelles were formed by addition of sodium dodecyl sulfate (SDS) to insolubilize the PMAPTAC block. On the other hand, PDMAEMA-core micelles were formed by increasing temperature at higher pH. It was revealed that these two types of the micelles can be reversibly converted to each other. The PMAPTAC/SDS-core micelles were collapsed to the unimers by removing SDS with anion exchange resin, followed by increase in temperature to form the PDMAEMA-core micelles. The PDMAEMA-core micelles were destructed to the unimers by decreasing temperature, followed by addition of SDS to form the PMAPTAC/SDS-core micelle. The micelle properties were extensively investigated by dynamic light scattering, scanning electron microscopy, ζ-potential, and turbidity measurements. © 2013 Elsevier B.V.
KW - Core-corona inversion
KW - Double hydrophilic block copolymer
KW - PDMAEMA
KW - PMAPTAC
KW - Schizophrenic micelles
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U2 - 10.1016/j.colsurfa.2013.05.033
DO - 10.1016/j.colsurfa.2013.05.033
M3 - Article
SN - 0927-7757
VL - 434
SP - 56
EP - 62
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
ER -