高等学校化学研究 ›› 2023, Vol. 39 ›› Issue (5): 803-808.doi: 10.1007/s40242-023-3154-6
ZHANG Tian1, JIA Xiaolu2, HOU Zaiyan1, XIE Ge1, ZHANG Lianbin1, ZHU Jintao1
ZHANG Tian1, JIA Xiaolu2, HOU Zaiyan1, XIE Ge1, ZHANG Lianbin1, ZHU Jintao1
摘要: 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.