Thermoresponsive nanoassemblies: Layer-by-layer assembly of hydrophilic-hydrophobic alternating copolymers

被引:59
作者
Quinn, JF [1 ]
Caruso, F [1 ]
机构
[1] Univ Melbourne, Dept Chem & Biomol Engn, Ctr Nanosci & Nanotechnol, Melbourne, Vic 3010, Australia
关键词
D O I
10.1021/ma047414n
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Multilayer films were assembled using the sequential alternate adsorption of a hydrophilichydrophobic copolymer, poly(styrene-alt-maleic acid) (PSMA), and poly(ethylene oxide) (PEO). The film buildup was followed using quartz crystal microgravimetry, and it was demonstrated that the incorporation of 0.2 M sodium chloride into the adsorption solution increased the adsorbed amount by a factor of approximately 2. Ten bilayer films of PSMA/PEO were shown to have a thickness of approximately 200500 nm, depending on the specific adsorption conditions used. The surface roughness of the films was examined using scanning force microscopy and shown to be dependent on both the adsorption conditions used and the terminal layer of the assembly. Films prepared at higher ionic strength had a rougher surface, and films terminated with PSMA were rougher than those terminated with PEO. The films were shown to have a strong affinity for Rhodamine B, with the dye concentration in the film exceeding that in the adjacent solution by a factor of approximately 7.3 x 10(4). The absorbed dye was then released by elevating the temperature of the film, with the release rate dependent on the temperature of the release solution. The inclusion of the hydrophobic domains was shown to have a strong influence on the thermoresponsive behavior of the assemblies.
引用
收藏
页码:3414 / 3419
页数:6
相关论文
共 39 条
[1]   Influence of the ionic strength on the polyelectrolyte multilayers' permeability [J].
Antipov, AA ;
Sukhorukov, GB ;
Möhwald, H .
LANGMUIR, 2003, 19 (06) :2444-2448
[2]   Investigation of electrostatic interactions in polyelectrolyte multilayer films:: Binding of anionic fluorescent probes to layers assembled onto colloids [J].
Caruso, F ;
Lichtenfeld, H ;
Donath, E ;
Möhwald, H .
MACROMOLECULES, 1999, 32 (07) :2317-2328
[3]   Polymeric multilayer films comprising deconstructible hydrogen-bonded stacks confined between electrostatically assembled layers [J].
Cho, J ;
Caruso, F .
MACROMOLECULES, 2003, 36 (08) :2845-2851
[4]   Methods of loading and releasing low molecular weight cationic molecules in weak polyelectrolyte multilayer films [J].
Chung, AJ ;
Rubner, MF .
LANGMUIR, 2002, 18 (04) :1176-1183
[5]   Fuzzy nanoassemblies: Toward layered polymeric multicomposites [J].
Decher, G .
SCIENCE, 1997, 277 (5330) :1232-1237
[6]  
Decher G., 2003, MULTILAYER THIN FILM
[7]   Highly ion conductive poly(ethylene oxide)-based solid polymer electrolytes from hydrogen bonding layer-by-layer assembly [J].
DeLongchamp, DM ;
Hammond, PT .
LANGMUIR, 2004, 20 (13) :5403-5411
[8]   Factors controlling the growth of polyelectrolyte multilayers [J].
Dubas, ST ;
Schlenoff, JB .
MACROMOLECULES, 1999, 32 (24) :8153-8160
[9]   HYDROPHOBIC BONDING IN ALTERNATING COPOLYMERS OF MALEIC ACID AND ALKYL VINYL ETHERS [J].
DUBIN, PL ;
STRAUSS, UP .
JOURNAL OF PHYSICAL CHEMISTRY, 1970, 74 (14) :2842-&
[10]  
DUBIN PL, 1967, J PHYS CHEM-US, V711, P2757