Coadsorption of sodium dodecyl sulfate and a polyanion onto poly(ethylenimine) in multilayered thin films

被引:35
作者
Johal, MS [1 ]
Ozer, BH
Casson, JL
John, AS
Robinson, JM
Wang, HL
机构
[1] New Coll Florida, Div Nat Sci, Sarasota, FL 34243 USA
[2] Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA
[3] Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA
关键词
D O I
10.1021/la0363635
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Mixed surfactant-polyelectrolyte multilayer films were fabricated by both ionic self-assembly and spin assembly. A polycation [PEI = poly(ethylenimine)] was deposited from a dilute solution, while a polyanion (PAZO = poly[1- [4-(3-carboxy-4-hydroxyphenylazo) benzenesulfonamido]-1,2-ethanediyl, sodium salt]) was deposited from a mixture containing a fixed concentration of polyanion and various concentrations of the anionic surfactant sodium dodecyl sulfate (SDS). Coadsorption of SDS and PAZO onto PEI layers was observed using both deposition methods and attributed to strong PEI-SDS interactions and entropic factors. Increasing the concentration of SDS resulted in films containing progressively less adsorbed PAZO. No further reduction in the amount of adsorbed PAZO was observed above the SDS critical micelle concentration. We attribute the film growth behavior to a fast adsorption of SDS onto PEI, followed by a slower adsorption of PAZO onto the remaining unoccupied binding sites. We observe that SDS interpenetrates throughout the PAZO and PEI layers, increasing the surface hydrophobicity of both. We observed similar behavior for both ionically self-assembled and spin-assembled systems.
引用
收藏
页码:2792 / 2796
页数:5
相关论文
共 34 条
[1]   Interactions of partially screened polyelectrolyte layers with oppositely charged surfactant in confined environment [J].
Abraham, T ;
Giasson, S .
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2001, 180 (1-2) :103-110
[2]  
[Anonymous], 1993, INTERACTIONS SURFACT
[3]  
Antonietti M, 1997, TRENDS POLYM SCI, V5, P262
[4]   Self-assembly in mixtures of poly(ethylene oxide)-graft-poly(ethyleneimine) and alkyl sulfates [J].
Bronich, TK ;
Cherry, T ;
Vinogradov, SV ;
Eisenberg, A ;
Kabanov, VA ;
Kabanov, AV .
LANGMUIR, 1998, 14 (21) :6101-6106
[5]   Kinetics and interpenetration of ionically self-assembled dendrimer and PAZO multilayers [J].
Casson, JL ;
Wang, HL ;
Roberts, JB ;
Parikh, AN ;
Robinson, JM ;
Johal, MS .
JOURNAL OF PHYSICAL CHEMISTRY B, 2002, 106 (07) :1697-1702
[6]   Reversal of interfacial dipole orientation in polyelectrolyte superlattices due to polycationic layers [J].
Casson, JL ;
McBranch, DW ;
Robinson, JM ;
Wang, HL ;
Roberts, JB ;
Chiarelli, PA ;
Johal, MS .
JOURNAL OF PHYSICAL CHEMISTRY B, 2000, 104 (50) :11996-12001
[7]  
Chiarelli PA, 2001, ADV MATER, V13, P1167, DOI 10.1002/1521-4095(200108)13:15<1167::AID-ADMA1167>3.0.CO
[8]  
2-A
[9]   Polyelectrolyte spin-assembly [J].
Chiarelli, PA ;
Johal, MS ;
Holmes, DJ ;
Casson, JL ;
Robinson, JM ;
Wang, HL .
LANGMUIR, 2002, 18 (01) :168-173
[10]  
Cho J, 2001, ADV MATER, V13, P1076, DOI 10.1002/1521-4095(200107)13:14<1076::AID-ADMA1076>3.0.CO