Chemical Research in Chinese Universities ›› 2023, Vol. 39 ›› Issue (5): 803-808.doi: 10.1007/s40242-023-3154-6

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Multiple Responsive Photonic Prints Through Localized Interpenetrating Polymer Network

ZHANG Tian1, JIA Xiaolu2, HOU Zaiyan1, XIE Ge1, ZHANG Lianbin1, ZHU Jintao1   

  1. 1. Key Laboratory of Material Chemistry for Energy Conversion and Storage of Ministry of Education, State Key Laboratory of Materials Processing and Mold Technology, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China;
    2. School of Chemistry & Chemical Engineering, Zhoukou Normal University, Zhoukou 466001, P. R. China
  • Received:2023-07-06 Online:2023-10-01 Published:2023-09-26
  • Contact: ZHANG Lianbin E-mail:zhanglianbin@hust.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (No.52022032), the Natural Science Foundation of Hubei Province, China (No.2022CFA048), and the Key Research Project of Henan Higher Education Institute, China (No.21A150066).

Abstract: Multiple responsive photonic prints that can be revealed by a thermal or light stimulus are prepared by locally producing interpenetrating polymer network (IPN) within photonic hydrogels. Thermo-responsive poly-(N-isopropylacrylamide) (PNIPAM) photonic hydrogels with self-assembled monodisperse carbon-encapsulated Fe3O4 nanoparticles (Fe3O4@C NPs) are first prepared by a photopolymerization process. Then photopolymerization of acrylamide (AM) is carried out within the photonic hydrogel with the help of a mask to generate an IPN structure locally. Because of the regionally different network structure and the resulting varied responsiveness, responsive photonic prints are obtained. Due to the thermo-responsive capability of the PNIPAM and the photothermal conversion capability of the incorporated Fe3O4@C NPs, the as-prepared photonic prints with a localized IPN structure can shift the structural color in a broad spectrum range under thermal or light stimuli. The current multiple responsive photonic prints with a localized IPN structure can realize full-color pattern display under thermal and light stimulations, providing a new path for anti-counterfeiting, display, and information encoding.

Key words: Photonic crystal, Photothermal, Hydrogel, Patterning, Stimuli-responsive