Synthesis and characterization of novel aromatic azo bond-containing pH-sensitive and hydrolytically cleavable IPN hydrogels

Padmanabh Chivukula, Karel Dušek, Dong Wang, Mirka Dušková-Smršková, Pavla Kopečková, Jindřich Kopeček

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Novel interpenetrating network (IPN) hydrogels, composed of pH-sensitive, aromatic azo group containing network as one component (Network A), and a hydrolyzable network as the other (Network B), were prepared by a sequential process. The first network was formed by crosslinking of a reactive polymer precursor (copolymer of N,N-dimethylacrylamide, acrylic acid, N-tert.butylacrylamide, and N-methacryloylglycylglycine p-nitrophenyl ester) with an aromatic azo group containing diamine ((N,N′-ε-aminocaproyl)- 4,4′-diaminoazobenzene). The second network was formed by radical crosslinking copolymerization of N-(2-hydroxypropyl)methacrylamide with N,O-dimethacryloylhydroxylamine. The composition of the hydrogels was manipulated to determine the influence of hydrogel composition on the equilibrium degree of swelling, modulus of elasticity in compression, and on the rate of degradation of Network B. Modeling of network structure was accomplished using the statistical branching theory. The major advantage of IPN hydrogels, when compared to traditional pH-sensitive networks, is the linear swelling profile following abrupt change of pH from 2 to 7.4. This indicates the suitability of IPN as carriers for oral drug delivery.

Original languageEnglish (US)
Pages (from-to)1140-1151
Number of pages12
JournalBiomaterials
Volume27
Issue number7
DOIs
StatePublished - Mar 1 2006

Fingerprint

Hydrogels
Interpenetrating polymer networks
Crosslinking
Swelling
Network components
Functional polymers
Drug Carriers
Diamines
Elastic Modulus
Hydrogel
Chemical analysis
Drug delivery
Copolymerization
Polymers
Esters
Copolymers
Elastic moduli
Acrylics
Degradation
Acids

Keywords

  • Degradation
  • Hydrogel
  • Interpenetrating polymer network
  • Mechanical properties

ASJC Scopus subject areas

  • Bioengineering
  • Ceramics and Composites
  • Biophysics
  • Biomaterials
  • Mechanics of Materials

Cite this

Synthesis and characterization of novel aromatic azo bond-containing pH-sensitive and hydrolytically cleavable IPN hydrogels. / Chivukula, Padmanabh; Dušek, Karel; Wang, Dong; Dušková-Smršková, Mirka; Kopečková, Pavla; Kopeček, Jindřich.

In: Biomaterials, Vol. 27, No. 7, 01.03.2006, p. 1140-1151.

Research output: Contribution to journalArticle

Chivukula, Padmanabh ; Dušek, Karel ; Wang, Dong ; Dušková-Smršková, Mirka ; Kopečková, Pavla ; Kopeček, Jindřich. / Synthesis and characterization of novel aromatic azo bond-containing pH-sensitive and hydrolytically cleavable IPN hydrogels. In: Biomaterials. 2006 ; Vol. 27, No. 7. pp. 1140-1151.
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