首页|Facile prepared tropinone-based enone dyes with visible-light induced photothermal liquefaction and cold crystallization properties for reusable and switchable adhesive
Facile prepared tropinone-based enone dyes with visible-light induced photothermal liquefaction and cold crystallization properties for reusable and switchable adhesive
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NSTL
The solid-liquid phase transition of adhesives triggered by two different wavelength light stimuli enables the switchable and reusable character.The adhesive which could be liquified by photothermal effect by single-wavelength light stimulus and solidified by natural cooling is much easier to operate but little developed.In this work,a class of tropinone-based enone dyes(TPs),prepared by one-pot Claisen-Schmidt condensation,were explored as a novel kind of single-wavelength light-switchable adhesives.TPs could absorption visible light and are non-fluorescent.By changing the length of alkoxy groups,the melting point and crystallization behavior were regulated.Especially,TP6 and TP8 could form overcooled liquid during the cooling process,thus enabling a proper adhesion operation window.Under 405 nm LED irradiation,the rapid solid-liquid transformation was achieved for some of TPs due to the high thermal conversion ability.TPs presented good adhesion strength toward glass plates.Among them,TP8 could work as a reusable and light-switchable adhesive.
State Key Laboratory of Chemical Resource Engineering,Beijing Laboratory of Biomedical Materials,College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing,100029,PR China
NSTL
