Carboxymethyl cellulose: Polyvinylamine complex hydrogel swelling

被引：55

作者：

Feng, Xianhua ^{[1
]}

Pelton, Robert ^{[1
]}

机构：

[1] McMaster Univ, Dept Chem Engn, Hamilton, ON L8S 4L7, Canada

来源：

MACROMOLECULES | 2007年 / 40卷 / 05期

关键词：

D O I：

10.1021/ma062608j

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The swelling behavior of the polyelectrolyte complex films made from polyvinylamine (PVAm) or poly(vinylformamide-co-vinylamine) copolymers and carboxymethyl cellulose (CMC) was studied as a function of polymer composition, pH, and salt concentration. Swelling is determined by the balance between ionic cross-link density, opposing swelling, with solvation and Donnan effects promoting swelling. Films containing excess ammonium groups gave the greatest swelling at low pH, whereas excess carboxyl groups enhanced swelling at high pH. Films with balanced charge stoichiometry (CMC:PVAm 3:1 w:w) gave the minimum swelling. High concentrations of sodium chloride increased swelling due to the decomposition (screening) of ionic cross-links, whereas calcium ion decreased swelling possibly because of calcium dicarboxylate cross-links. A simple swelling model based on the ionization behavior of dilute polymers and ionic cross-linking predicted the major swelling behaviors, including the effects of pH and polymer composition.

引用

页码：1624 / 1630

页数：7

共 44 条

[1] Swelling-deswelling behavior of poly(acrylamide-co-maleic acid) hydrogels [J].

Bajpai, SK .

JOURNAL OF APPLIED POLYMER SCIENCE, 2001, 80 (14) :2782-2789

[2] SWELLING EQUILIBRIA FOR ACRYLAMIDE-BASED POLYAMPHOLYTE HYDROGELS [J].

BAKER, JP ;

STEPHENS, DR ;

BLANCH, HW ;

PRAUSNITZ, JM .

MACROMOLECULES, 1992, 25 (07) :1955-1958

[3]

BRUNNMUELLER, 1983, Patent No. 4421602

[4]

CHAMP S, 2004, Patent No. 096895

[5] pH-dependence of the properties of hydrophobically modified polyvinylamine [J].

Chen, XN ;

Wang, Y ;

Pelton, R .

LANGMUIR, 2005, 21 (25) :11673-11677

[6] Influence of low-molecular-weight salts on the formation of polyelectrolyte complexes based on polycations with quaternary ammonium salt groups in the main chain and poly(sodium acrylate) [J].

Dragan, S ;

Cristea, M .

EUROPEAN POLYMER JOURNAL, 2001, 37 (08) :1571-1575

[7] Swelling and smoothing of polyelectrolyte multilayers by salt [J].

Dubas, ST ;

Schlenoff, JB .

LANGMUIR, 2001, 17 (25) :7725-7727

[8] Ellipsometric determination of Flory-Huggins interaction parameters in solution [J].

Elbs, H ;

Krausch, G .

POLYMER, 2004, 45 (23) :7935-7942

[9] Swelling of model films of cellulose having different charge densities and comparison to the swelling behavior of corresponding fibers [J].

Fält, S ;

Wågberg, L ;

Vesterlind, EL .

LANGMUIR, 2003, 19 (19) :7895-7903

[10]

FENG X, IN PRESS LANGMUIR

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