Mechanics versus thermodynamics: Swelling in multiple-temperature-sensitive core-shell microgels

被引：88

作者：

Berndt, I

Popescu, C

Wortmann, FJ

Richtering, W

机构：

[1] Univ Aachen, Rhein Westfal TH Aachen, Inst Phys Chem, D-52074 Aachen, Germany

[2] Univ Aachen, Rhein Westfal TH Aachen, Deutsch Wollforsch Inst, D-52056 Aachen, Germany

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2006年 / 45卷 / 07期

关键词：

core-shell particles; gels; polymers; thermochemistry; thermodynamics;

D O I：

10.1002/anie.200502893

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The thermal transition of a thermoresponsive microgel of poly-N-isopropylacrylamide (PNIPAM; transition temperature =34°C) is shifted to higher temperatures when it is embedded in a shell of temperature-sensitive poly-N-isopropylmethacrylamide (PNIPMAM; transition temperature = 44°C). The magnitude of the shift depends on the shell/core mass ratio. A thick shell induces a third transition arising from strong mechanical forces exerted on the core. (Figure Presented). © 2006 Wiley-VCH Verlag GmbH & Co. KGaA.

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页码：1081 / 1085

页数：5

相关论文

共 20 条

[1] Doubly temperature sensitive core-shell microgels [J].

Berndt, I ;

Richtering, W .

MACROMOLECULES, 2003, 36 (23) :8780-8785

[2] Structure of multiresponsive "intelligent" core-shell microgels [J].

Berndt, I ;

Pedersen, JS ;

Richtering, W .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (26) :9372-9373

[3] Polymer micelle with cross-linked ionic core [J].

Bronich, TK ;

Keifer, PA ;

Shlyakhtenko, LS ;

Kabanov, AV .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (23) :8236-8237

[4] Interfacial nonradiative energy transfer in responsive core-shell hydrogel nanoparticles [J].

Gan, DJ ;

Lyon, LA .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2001, 123 (34) :8203-8209

[5] Supramolecular drug-delivery systems based on polymeric core-shell architectures [J].

Haag, R .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2004, 43 (03) :278-282

[6]

Haag R., 2004, ANGEW CHEM, V116, P280

[7] Nanocages derived from shell cross-linked micelle templates [J].

Huang, HY ;

Remsen, EE ;

Kowalewski, T ;

Wooley, KL .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1999, 121 (15) :3805-3806

[8] Synthesis and characterization of multiresponsive core-shell microgels [J].

Jones, CD ;

Lyon, LA .

MACROMOLECULES, 2000, 33 (22) :8301-8306

[9] Shell-restricted swelling and core compression in poly(N-isopropylacrylamide) core-shell microgels [J].

Jones, CD ;

Lyon, LA .

MACROMOLECULES, 2003, 36 (06) :1988-1993

[10] Dependence of shell thickness on core compression in acrylic acid modified poly(N-isopropylacrylamide) core/shell microgels [J].

Jones, CD ;

Lyon, LA .

LANGMUIR, 2003, 19 (11) :4544-4547