Self-Assembly and Metalation of pH-Sensitive Double Hydrophilic Block Copolymers with Interacting Polymer Components

被引:12
|
作者
Permyakova, Nataliya [1 ]
Zheltonozhskaya, Tatyana [1 ]
Revko, Olga [1 ]
Grischenko, Lyudmila [1 ]
机构
[1] Kiev Natl Taras Shevchenko Univ, Fac Chem, Dept Macromol Chem, UA-01033 Kiev, Ukraine
关键词
diblock copolymers; micelles; nanoparticles; self-assembly; silver; POLY(METHACRYLIC ACID); POLY(ACRYLIC ACID); COMPLEX-FORMATION; POLY(ETHYLENE; MICELLIZATION; SODIUM; SALTS; WATER;
D O I
10.1002/masy.201100079
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Double hydrophilic diblock copolymers (DBCs) contained chemically complementary methoxypoly(ethylene oxide) and poly(acrylic acid) (MOPEO-b-PAAc) with the constant length of MOPEO block (M-vMOPEO = 5 kDa) and variable length of polyacid block (M-nPAAc = 9.9 divided by 23.1 kDa) were synthesized by a free radical block copolymerization of PAAc with methoxypoly(ethylene glycol) (MOPEG). These copolymers were pH-sensitive in aqueous medium, namely, at low pH the polyacid blocks were protonated and formed the intramolecular polycomplexes with MOPEO blocks that resulted in an intense micellization initiated by hydrophobic interactions between non-polar bound segments of the blocks. Hydrophobic "core" of the micelles comprised H-bonded segments of MOPEO and PAAc blocks while hydrophilic "corona"included the surplus units of longer blocks. The capability of DBCs as templates for the silver nanocluster/nanoparticle is considered. The kinetics of the Ag-nanoparticle growth in the copolymer matrices and optical properties of nanoclusters and nanoparticles were determined and discussed.
引用
收藏
页码:63 / 74
页数:12
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