Synthesis and characterization of photosensitive humidity-responsive cobalt ion coordination polyurethanes

Yanhong Wei; Tian Yun; Xiaowen Yu; Luziping Zhang; Fei Xiao; Lian Wang

doi:10.1117/12.3025198

8 February 2024 Synthesis and characterization of photosensitive humidity-responsive cobalt ion coordination polyurethanes

Yanhong Wei, Tian Yun, Xiaowen Yu, Luziping Zhang, Fei Xiao, Lian Wang

Author Affiliations +

Proceedings Volume 13066, International Conference on Optoelectronic Materials and Devices (ICOMD 2023); 130660M (2024) https://doi.org/10.1117/12.3025198
Event: 2023 International Conference on Optoelectronic Materials and Devices (COMD 2023), 2023, Chongqing, China

Abstract

CoPU films with different complexing ratios were synthesized by coordination modification experiments on polyurethane using cobalt chloride as the complexing agent. In view of the phenomena that the colour of CoPU film changed from blue to pink and the transparency decreased during the process of storage in a humidity environment, the FT-IR spectra and the humidity response of the transmittance were studied. The results show that CoPU films absorb water to form a coordinated crystalline water structure in the humidity environment, and the cobalt ion configuration changes from sp³ tetrahedron state to d²sp³ octahedron state, resulting in the change of colour and transparency. This process is reversible. Meanwhile, there is a good linear relationship between the moisture absorptivity and the average transmittance of the visible light region of the low complexing ratio material films, which has application prospects of photosensitive humidity-responsive polyurethane materials.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yanhong Wei, Tian Yun, Xiaowen Yu, Luziping Zhang, Fei Xiao, and Lian Wang "Synthesis and characterization of photosensitive humidity-responsive cobalt ion coordination polyurethanes", Proc. SPIE 13066, International Conference on Optoelectronic Materials and Devices (ICOMD 2023), 130660M (8 February 2024); https://doi.org/10.1117/12.3025198

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