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April 27, 2025Advanced Materials InterfacesOpen Access

Fabrication of Schiff Base Interfacial Films via Polyethyleneimine and Glutaraldehyde for pH‐Responsive Oil‐in‐Water High Internal Phase Emulsions

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Authors

LSLei SunHainan UniversityFYFei YeWenzhou Medical UniversityWZWenhui ZhuUniversity of Science and Technology of China

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Implication

Experimental study reveals robust Schiff base film stabilization for oil-in-water emulsions, indicating a programmable route for pH-responsive materials.

Key Points

  • To fabricate a stable, stimuli-responsive physical barrier at the oil-water interface using Schiff base polymerization to prevent phase separation in high internal phase emulsions.
  • Accumulated polyethyleneimine at the oil-water boundary and crosslinked it with glutaraldehyde via homogeneous phase Schiff base polymerization to form an interfacial film.
  • Evaluated emulsion durability against phase separation and tested the structural responsiveness under varying acidic pH conditions.
  • Schiff base interfacial films prevented phase separation of oil-in-water high internal phase emulsions for more than 110 days.
  • Acid-induced degradation of the interfacial film and shifts in polyethyleneimine protonation enabled programmable, pH-responsive disassembly of emulsions and capsules.

Cite This Study

Sun et al. (2025) studied this question.

synapsesocial.com/papers/6aa8e77616a2a0577c6bf96ehttps://doi.org/10.1002/admi.202500019
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