Structure and dynamics of polyelectrolyte-surfactant complexes as revealed by solid state NMR

被引:45
作者
Antonietti, M [1 ]
Radloff, D [1 ]
Wiesner, U [1 ]
Spiess, HW [1 ]
机构
[1] MAX PLANCK INST POLYMER RES,D-55021 MAINZ,GERMANY
关键词
D O I
10.1002/macp.1996.021970910
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
C-13-CP/MAS-NMR (cross-polarization magic angle spinning), 2D-WISE (wideline separation experiment) and H-1-spin diffusion experiments allow to gain new insight into the structure and dynamics of solid polyelectrolyte-surfactant complexes, a material with pronounced mesophase formation. Experiments were performed on two different complexes of polystyrene sulfonate and octadecyltrimethylammonium or tetradecyltrimethylammonium counterions, PSS-C-18 and PSS-C-14. The strong mobility differences between the ionic and alkyl phase in the lamellar complex PSS-C-18 are reflected in the NMR behavior: in the surfactant tails, a mobility gradient towards the terminal methyl group is observed. This fact as well as a high content of gauche conformations suggest a non-interdigitating morphology of the tails at room temperature. The behavior changes during cooling below an endothermic transition centered at 255 K where a high trans content and a homogenization of the side chain dynamics is observed. We attribute this transition which is invisible in the X-ray experiments to the formation of a highly transoid, interdigitated phase of the surfactant tails which is however not crystallized in a classical sense. H-1-spin diffusion experiments allow to estimate the distance between mobile and immobile regions of the sample. For the complex PSS-C-14, the length scale determined by NMR is essentially that of the primary lamellar structure. For PSS-C-18, a characteristic length of the density fluctuations within the proposed undulated lamellar structure is estimated.
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页码:2713 / 2727
页数:15
相关论文
共 30 条
[1]  
ADAM A, 1990, MAKROMOL CHEM-RAPID, V11, P249
[2]   MULTIPLE ORDERED PHASES IN A BLOCK COPOLYMER MELT [J].
ALMDAL, K ;
KOPPI, KA ;
BATES, FS ;
MORTENSEN, K .
MACROMOLECULES, 1992, 25 (06) :1743-1751
[3]  
[Anonymous], POLYM CHARACTERIZATI
[4]   Fine-tuning of phase structures and thermoplasticity of polyelectrolyte-surfactant complexes: Copolymers of ionic monomers with N-alkylacrylamides [J].
Antonietti, M ;
Maskos, M .
MACROMOLECULES, 1996, 29 (12) :4199-4205
[5]   MESOMORPHOUS POLYELECTROLYTE-SURFACTANT COMPLEXES [J].
ANTONIETTI, M ;
BURGER, C ;
EFFING, J .
ADVANCED MATERIALS, 1995, 7 (08) :751-753
[6]   COMPLEXATION OF LECITHIN WITH CATIONIC POLYELECTROLYTES - PLASTIC MEMBRANES AS MODELS FOR THE STRUCTURE OF THE CELL-MEMBRANE [J].
ANTONIETTI, M ;
KAUL, A ;
THUNEMANN, A .
LANGMUIR, 1995, 11 (07) :2633-2638
[7]   SYNTHESIS OF VERY HIGHLY ORDERED LIQUID-CRYSTALLINE PHASES BY COMPLEX-FORMATION OF POLYACRYLIC-ACID WITH CATIONIC SURFACTANTS [J].
ANTONIETTI, M ;
CONRAD, J .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH, 1994, 33 (18) :1869-1870
[8]   The ''egg-carton'' phase: A new morphology of complexes of polyelectrolytes with natural lipid mixtures [J].
Antonietti, M ;
Wenzel, A ;
Thunemann, A .
LANGMUIR, 1996, 12 (08) :2111-2114
[9]   Highly ordered materials with ultra-low surface energies: Polyelectrolyte surfactant complexes with fluorinated surfactants [J].
Antonietti, M ;
Henke, S ;
Thunemann, A .
ADVANCED MATERIALS, 1996, 8 (01) :41-&
[10]   POLYELECTROLYTE-SURFACTANT COMPLEXES - A NEW-TYPE OF SOLID, MESOMORPHOUS MATERIAL [J].
ANTONIETTI, M ;
CONRAD, J ;
THUNEMANN, A .
MACROMOLECULES, 1994, 27 (21) :6007-6011