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- 저자 : Changwu Zheng (검색결과 1 건)
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Changwu Zheng,Huijun Han,Aiqin Gao,Meng Ju,Aiqin Hou,Kongliang Xie 한국섬유공학회 2023 Fibers and polymers Vol.24 No.2
Designing photochromic molecules to improve color sensitivity and reversibility of functional materials in the solidifiedstate is still a major challenge. In this work, a series of photochromic molecules containing-spiropyran with different freevolume groups have been designed and synthesized by introducing flexible spacers. The relationship of the photosensitivityand molecular free volume was investigated and the excellent reversible photoswitching molecules in both solution andsolid state were obtained. The photosensitivity of the molecules increased with the increase of molecular free volume. Thephotochromic equilibrium time of the molecule with longer alkyl chain reduced from the 330 s to 60 s, and the recoveringequilibrium time reduced from the 480 s to 40 s. The photosensitivity enhancement mechanism was explained by densityfunctional theory and molecular volume calculations. The designed photochromic molecules were applied to polyesterfabrics. The photochromic materials with excellent photosensitivity and good reversibility were obtained, which exhibitedhigh contrast and sensitive reversible color changes. The photochromic materials have potential applications in the field ofsmart textiles, optical devices, anti-counterfeiting, etc.
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