Cited by 304Hydrogels: synthesis, properties, applicationsAdvanced Materials and MechanicsPolymer composites and self-healing

pH-induced shape-memory polymers

Han, Xiao‐Juan, Dong, Zhen‐Qiang, Fan, Min‐Min, Liu, Yan, li, Jian‐Hu, Wang, Yi‐Fu, Yuan, Qi‐Juan, Li, Bang‐Jing +1 more·2012·Macromolecular Rapid Communications

Abstract

A novel pH sensitive shape-memory polymer (SMP) is prepared by cross-linking the β-cyclodextrin modified alginate (β-CD-Alg) and diethylenetriamine modified alginate (DETA-Alg): The pH reversible β-CD-DETA inclusion complexes serve as a reversible phase, and the cross-linked alginate chains serve as a fixing phase. It is shown that this material can be processed into temporary shape as we needs at pH 11.5 and recover to its initial shape at pH 7. The recovery ratio and the fixity ratio were 95.7 ± 0.9% and 94.8 ± 1.1%, respectively. Furthermore, this material showed good degradability and biocompatibility. Because the shape transition pH value is quite close to that of our body fluid and this pH triggered shape-memory effect is convenient and safe to use, this material has a high potential for medical application.

Integrity signals

Registry

Crossref · 10.1002/marc.201200153

Cites

21 of 21 references verified0 citation errors · 0 not checkable

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  • Han et al. proposed to use pH as trigger for SMPs for its convenience and safety in medical applications.

    “In 2012 Han et al. proposed to use pH as trigger for SMPs for its convenience and safety in medical applications [59].”
  • Chemo-responsive SMPs (pH-, redox-, moisture- and solvent-induced) are one of the barely studied systems in the literature.

    “Chemo-responsive SMPs, pH-, redox- and moisture- and solvent-induced, are one of the barely studied systems in the literature [57-59].”
  • In the pH-responsive system, alginate chains cross-linked with calcium cations served as the fixation domain, while the switching domain was constituted of β-cyclodextrin and diethylenetriamine when introduced in the Alg matrix.

    “On the molecular level, such systems were dual-component, similar to the heating-responsive SMPs. Alginate (Alg) chains cross-linked with calcium cations served as the fixation domain, while the switching domain was constituted of b -cyclodextrin ( b -CD) and diethylenetriamine (DETA) when introduced in the Alg matrix.”
  • At pH 11.5, inclusion complexes between β-CD and DETA were formed, and these complexes were dissociated at neutral pH.

    “At pH 11.5, inclusion complexes between b -CD and DETA were formed. In return, these complexes were dissociated at neutral pH.”

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Authors
Han, X., Dong, Z., Fan, M., Liu, Y., li, J., Wang, Y., Yuan, Q., Li, B., & Zhang, S.
Affiliations
  • Sichuan University (CN)
  • Chinese Academy of Sciences (CN)
Corresponding author
  • Li, Bang‐Jing
  • Zhang, Sheng
Venue
Macromolecular Rapid Communications
Publisher
Wiley
Published
2012-04-20
Volume
33
Issue
12
Pages
1055-1060
ISSN
  • 1022-1336 (ISSN-L)
  • 1521-3927
OpenAlex
W1981343413
Cited by
304
References
22
Citations by year
2026: 10 · 2025: 21 · 2024: 22 · 2023: 23 · 2022: 20 · 2021: 37 · 2020: 33 · 2019: 27 · 2018: 31 · 2017: 16 · 2016: 20 · 2015: 16 · 2014: 12 · 2013: 13 · 2012: 3
FWCI
6.46
Type
journal article
Language
en
Open access
closed
Locations
  • Macromolecular Rapid Communications (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Medicine › Hydrogels: synthesis, properties, applications
  • Physical Sciences › Engineering › Mechanical Engineering › Advanced Materials and Mechanics
  • Physical Sciences › Materials Science › Polymers and Plastics › Polymer composites and self-healing
Keywords
shape memory polymers, pH-responsive materials, β-cyclodextrin, alginate, diethylenetriamine, inclusion complexes, shape recovery, biodegradability, biocompatibility, medical applications
MeSH terms
Alginates, Biocompatible Materials, Cross-Linking Reagents, Hydrogen-Ion Concentration, Polymers, Temperature, beta-Cyclodextrins

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