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Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly
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Published on: November 4, 2021

pH-Switchable macroscopic assembly through host-guest inclusion.

Qi-Juan Yuan1, Yi-Fu Wang, Jian-Hu Li

  • 1State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China.

Macromolecular Rapid Communications
|June 8, 2013
PubMed
Summary
This summary is machine-generated.

Researchers developed a pH-switchable hydrogel assembly using alginate functionalized with host (α-cyclodextrin) and guest (diethylenetriamine) molecules. This biocompatible system reversibly adheres at pH 11.5 and separates at pH 7.0, showing promise for biomedical applications.

Keywords:
cyclodextrinhost-guest systemsmacroscopic assemblypH sensitive

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Biotechnology

Background:

  • Host-guest interactions are crucial for molecular recognition and self-assembly.
  • Developing stimuli-responsive materials is key for advanced applications.
  • Alginate hydrogels offer biocompatibility and tunable properties.

Purpose of the Study:

  • To create a novel pH-switchable macroscopic assembly using functionalized alginate hydrogels.
  • To investigate the pH-dependent adhesion and dissociation of host-guest hydrogels.
  • To explore the potential of this system in biotechnological and biomedical fields.

Main Methods:

  • Functionalization of alginate-based hydrogels with host (α-cyclodextrin, αCD) and guest (diethylenetriamine, DETA) moieties.
  • Investigating the pH-dependent binding affinity between αCD and DETA.
  • Fabricating and testing the macroscopic assembly's adhesion and dissociation properties at different pH values (7.0 and 11.5).
  • Assessing the reversibility and biocompatibility of the system.

Main Results:

  • A pH-switchable macroscopic assembly was successfully fabricated using alginate hydrogels.
  • Host (αCD) and guest (DETA) functionalized hydrogels demonstrated pH-sensitive adhesion, occurring at pH 11.5 and dissociation at pH 7.0.
  • The adhesion and dissociation process exhibited good reversibility.
  • The developed hydrogel system showed good biocompatibility.

Conclusions:

  • Alginate-based hydrogels functionalized with host and guest moieties can form a pH-switchable macroscopic assembly.
  • This system offers controllable and reversible adhesion/dissociation based on pH changes.
  • The biocompatibility and pH-responsiveness make it a promising candidate for biotechnological and biomedical applications.