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Stimuli-responsive microgels that exhibit rapid changes in size in response to external stimuli such as pH and temperature are of great interest for the development of smart sensors, drug delivery carriers, and separation materials. This paper describes the preparation of molecule-responsive microgels with molecular recognition sites comprising a hydrophilic network via inverse miniemulsion polymerization using a water-soluble emulsifier. The water-soluble emulsifier comprising hydrophilic poly(sulfobetaine) and hydrophilic/oleophilic poly[oligo(ethylene glycol)methacrylate-co-2-(2’-methoxyethoxy)ethyl methacrylate] blocks were synthesized via reversible addition fragmentation chain transfer (RAFT) polymerization. The resulting block copolymer, PSB-POEG, stabilized the water-chloroform interface in a water-in-oil (W/O) emulsion. Water droplets in a W/O emulsion stabilized with PSB-POEG allowed the inverse miniemulsion polymerization of acrylamide (AAm), acryloyl-modified β-cyclodextrin (CD), and N,N’-methylenebisacrylamide to obtain CD-conjugated PAAm microgels with a diameter of approximately 150 nm. The resulting CD-PAAm microgels were stably dispersed in an aqueous medium by the addition of water, followed by evaporation of chloroform. The CD-PAAm microgels exhibited rapid shrinkage in response to bisphenol A (BPA) owing to the formation of CD-BPA-CD complexes acting as dynamic cross-links. The proposed method for preparing hydrophilic microgels by inverse miniemulsion polymerization using a water-soluble emulsifier allows the preparation of molecularly imprinted and bioconjugated microgels, providing a useful platform for designing rapidly responsive soft nanomaterials for molecular sensors, separation substrates, and drug delivery carriers.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Molecule-responsive microgel, inverse miniemulsion polymerization, Water-soluble emulsifier, RAFT polymerization, zwitterionic polymer, inclusion complex, Cyclodextrin

刊行年月日: 2026-12-31

出版者: Taylor & Francis

掲載誌:

• Science and Technology of Advanced Materials (ISSN: 14686996) vol. 27 2610881

研究助成金:

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.6137

公開URL: https://doi.org/10.1080/14686996.2025.2610881

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更新時刻: 2026-02-03 15:04:59 +0900

MDRでの公開時刻: 2026-01-19 12:21:37 +0900