Synthesis and characterization of thermosensitive core-shell polymeric nanoparticles

被引：6
|
作者：
Facundo, I. A. [2 ]
Soria, M. J. [2 ]
Rosales, M. G. [2 ]
Elizalde, L. E. [1 ]
Diaz de Leon, R. [1 ]
Saade, H. [1 ]
Lopez, R. G. [1 ]
机构：
[1] Ctr Invest Quim Aplicada, Saltillo 25253, Coahuila, Mexico
[2] UA C, Fac Met, Monclova 25710, Coahuila, Mexico
来源：
POLYMER BULLETIN | 2011年 / 67卷 / 06期
关键词：
Thermosensitive nanoparticles; Core-shell; Semicontinuous heterophase polymerization; LATEX-PARTICLES; MICROEMULSION POLYMERIZATION; VOLUME TRANSITION; BUTYL ACRYLATE; SIZE; KINETICS; ADSORPTION;
D O I：
10.1007/s00289-010-0440-5
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Thermosensitive core-shell nanoparticles were synthesized by semicontinuous heterophase polymerization of styrene, followed by a seeded polymerization for forming a shell of poly(N-isopropyl acrylamide) (PNIPAM). Nanoparticles characterization by scanning transmission electronic microscopy showed core-shell morphology with average particle diameters around 40 nm. An inverse dependence of the particle size with temperature in the range 20-55 A degrees C was identified by quasielastic light scattering measurements. As was expected for core-shell particles with PNIPAM as the shell, a volume phase transition near 32 A degrees C was detected. In spite of thermosensitive properties of core-shell nanoparticles synthesized here, the volume percentage loss values were not so high, probably due to their relatively low content of PNIPAM.
引用
收藏
页码：985 / 995
页数：11
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