Nature-inspired thermo-responsive multifunctional membrane adaptively hybridized with pnipam and ppy

Hyejeong Kim, Kiwoong Kim, Sang Joon Lee

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)

Abstract

Specialized plant tissues, such as the epidermis of a leaf covered with stomata, consist of soft materials with deformability and electrochemical properties to achieve specific functions in response to various environmental stimuli. Stimulus-responsive hydrogels with electrochemical properties are good candidates for imitating such special functionalities in nature and thus have great potential in a wide range of academic and industrial applications. However, hydrogel-incorporated conductive materials are usually mechanically rigid, which limits their application in other fields. In addition, the fabrication technology of structured functional hydrogels has low reproducibility due to the required multistep processing. Here, inspired by nature, specifically the stimulus-responsive functionalities of plants, a new thermo-responsive multifunctional hybrid membrane (HM) is synthesized through the in situ hybridization of conductive poly(pyrrole) (PPy) on a photopolymerized poly(N-isopropylacrylamide) (PNIPAm) matrix. The morphological and electrical properties of the fabricated HM are investigated to characterize various aspects of its multiple functions. In terms of morphology, the HM can be easily fabricated into various structures by smartly utilizing photopolymerization patterning, and it exhibits thermo-responsive deformability. In terms of functionality, it exhibits various electrical and charge responses to thermal stimuli. This simple and efficient fabrication method can be used as a promising platform for fabricating a variety of functional devices.

Original languageEnglish
Article numbere445
JournalNPG Asia Materials
Volume9
Issue number10
DOIs
Publication statusPublished - 2017
Externally publishedYes

Bibliographical note

Funding Information:
We thank the National Institute for Nanomaterials Technology (Pohang, Korea) and Gyeongyun Go in the Department of Life Science, POSTECH, for help in performing the experiments for scanning electron microscopy and freeze-drying the samples. We also appreciate Hyunah Kwon in the Department of Materials Science and Engineering, POSTECH, who helped perform the four-point probe method measurements. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (number 2017R1A2B3005415).

Publisher Copyright:
© The Author(s) 2017.

ASJC Scopus subject areas

  • Modelling and Simulation
  • General Materials Science
  • Condensed Matter Physics

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