Drastic morphological modification of polyelectrolyte microcapsules induced by high temperature

被引：85

作者：

Köhler, K ^{[1
]}

Shchukin, DG ^{[1
]}

Sukhorukov, GB ^{[1
]}

Möhwald, H ^{[1
]}

机构：

[1] Max Planck Inst Colloids & Interfaces, D-14424 Potsdam, Germany

来源：

MACROMOLECULES | 2004年 / 37卷 / 25期

关键词：

D O I：

10.1021/ma048474w

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Polyelectrolyte multilayer microcapsules of two different sizes consisting of poly(allylamine hydrochloride) and poly(styrenesulfonate) assembled on melamine formaldehyde cores were investigated by means of scanning (SEM) and transmission electron microscopy (TEM), confocal laser scanning microscopy (CLSM), and scanning force microscopy (SFM) regarding their stability at temperatures above 100 degreesC. A pronounced shrinking of the capsules accompanied by a wall thickness increase by more than 10 times was observed after incubating the capsule suspensions in an autoclave at 120 degreesC for 20 min. An estimation of the capsule wall volume revealed a densification of the polyelectrolyte layers and an exclusion of intercalated water. The gain of entropy resulting from a more coiled and interdigitated state of the polyions as well as from the great decrease of the polyelectrolyte/water interface is considered to be the driving force of this rearrangement process.

引用

页码：9546 / 9550

页数：5

共 46 条

[1] Polyelectrolyte multilayer capsule permeability control [J].

Antipov, AA ;

Sukhorukov, GB ;

Leporatti, S ;

Radtchenko, IL ;

Donath, E ;

Möhwald, H .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2002, 198 :535-541

[2] Influence of the ionic strength on the polyelectrolyte multilayers' permeability [J].

Antipov, AA ;

Sukhorukov, GB ;

Möhwald, H .

LANGMUIR, 2003, 19 (06) :2444-2448

[3] Fabrication of a novel type of metallized colloids and hollow capsules [J].

Antipov, AA ;

Sukhorukov, GB ;

Fedutik, YA ;

Hartmann, J ;

Giersig, M ;

Möhwald, H .

LANGMUIR, 2002, 18 (17) :6687-6693

[4] Assembling alternate dye-polyion molecular films by electrostatic layer-by-layer adsorption [J].

Ariga, K ;

Lvov, Y ;

Kunitake, T .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1997, 119 (09) :2224-2231

[5] Forster energy transfer studies of polyelectrolyte heterostructures containing conjugated polymers: A means to estimate layer interpenetration [J].

Baur, JW ;

Rubner, MF ;

Reynolds, JR ;

Kim, S .

LANGMUIR, 1999, 15 (19) :6460-6469

[6]

Bertrand P, 2000, MACROMOL RAPID COMM, V21, P319, DOI 10.1002/(SICI)1521-3927(20000401)21:7<319::AID-MARC319>3.0.CO

[7]

2-7

[8] Layer-by-layer assembly of thin film zener diodes from conducting polymers and CdSe nanoparticles [J].

Cassagneau, T ;

Mallouk, TE ;

Fendler, JH .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1998, 120 (31) :7848-7859

[9] BUILDUP OF ULTRATHIN MULTILAYER FILMS BY A SELF-ASSEMBLY PROCESS .3. CONSECUTIVELY ALTERNATING ADSORPTION OF ANIONIC AND CATIONIC POLYELECTROLYTES ON CHARGED SURFACES [J].

DECHER, G ;

HONG, JD ;

SCHMITT, J .

THIN SOLID FILMS, 1992, 210 (1-2) :831-835

[10] Fuzzy nanoassemblies: Toward layered polymeric multicomposites [J].

Decher, G .

SCIENCE, 1997, 277 (5330) :1232-1237

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