Synthesis of sponge-like polymer dispersions via polymerization of bicontinuous microemulsions

被引:53
作者
Antonietti, M
Hentze, HP
机构
[1] Max-Planck-Inst. F. Kolloid- G., 14513 Teltow-Seehof
关键词
polymerization in bicontinuous microemulsions; interaction of polymers with lyotropic phases; sponge-like polymer dispersions;
D O I
10.1007/BF00653069
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Polymer gels with high water content are made by polymerization of hydrophilic/hydrophobic monomer mixtures in bicontinuous microemulsions. These structures can be described as a heterophasic, bicontinuous polymer colloid-in-water structure, the characteristic length of which is only indirectly influenced by the original microemulsion mixture. The structure formation and phase changes throughout the polymerization reaction are followed with rheology, polarization microscopy, and scanning and transmission electron microscopy. It is shown that already the very first formed polymer changes disturb the bicontinuous phase structure and nucleate a vesicular phase; with further consumption of the monomer mixture, at least three other phase transitions can be detected, ending with a simple globular surfactant structure. Although direct templating of the original mesomorphous structure does not occur, the existence of the diverse lyotropic phases influences the final structure. It is shown that simple dilution changes the characteristic length of the network elements from about 2 mu m down to 50 nm. This is explained by a combination of a nucleation-and-growth mechanism with the influence of a restricted colloidal stability in anisometric lyotropic phases.
引用
收藏
页码:696 / 702
页数:7
相关论文
共 17 条
[1]   POLYMERIZATION IN MICROEMULSIONS - A NEW APPROACH TO ULTRAFINE, HIGHLY FUNCTIONALIZED POLYMER DISPERSIONS [J].
ANTONIETTI, M ;
BASTEN, R ;
LOHMANN, S .
MACROMOLECULAR CHEMISTRY AND PHYSICS, 1995, 196 (02) :441-466
[2]   COPOLYMERIZATION OF WATER-SOLUBLE MONOMERS IN NONIONIC BICONTINUOUS MICROEMULSIONS [J].
CANDAU, F ;
ZEKHNINI, Z ;
DURAND, JP .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1986, 114 (02) :398-408
[3]  
CANDAU F, 1989, ACS SYM SER, V384, P48
[4]  
CANDAUU F, 1992, POLYM ORG MED
[5]  
CHAMBON F, 1986, J RHEOL, V30, P367
[6]   MORPHOLOGY OF MICROPOROUS POLYMERIC MATERIALS BY POLYMERIZATION OF METHYL-METHACRYLATE AND 2-HYDROXYETHYL METHACRYLATE IN MICROEMULSIONS [J].
CHIENG, TH ;
GAN, LM ;
CHEW, CH ;
NG, SC .
POLYMER, 1995, 36 (10) :1941-1946
[7]   MICROPOROUS POLYMERIC MATERIALS BY MICROEMULSION POLYMERIZATION - EFFECT OF SURFACTANT CONCENTRATION [J].
CHIENG, TH ;
GAN, LM ;
CHEW, CH ;
LEE, L ;
NG, SC ;
PEY, KL ;
GRANT, D .
LANGMUIR, 1995, 11 (09) :3321-3326
[8]   MICROPOROUS POLYMERIC MATERIALS FROM MICROEMULSION POLYMERIZATION [J].
GAN, LM ;
CHIENG, TH ;
CHEW, CH ;
NG, SC .
LANGMUIR, 1994, 10 (11) :4022-4026
[9]   POLYMERIZATION OF ACRYLAMIDE IN A SWOLLEN LAMELLAR MESOPHASE [J].
HOLTZSCHERER, C ;
WITTMANN, JC ;
GUILLON, D ;
CANDAU, F .
POLYMER, 1990, 31 (10) :1978-1985
[10]   SALT EFFECT ON SOLUTIONS OF NONIONIC SURFACTANTS AND ITS INFLUENCE ON THE STABILITY OF POLYMERIZED MICROEMULSIONS [J].
HOLTZSCHERER, C ;
CANDAU, F .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1988, 125 (01) :97-110