شماره ركورد كنفرانس :
5536
عنوان مقاله :
Thermo- and photo-switchable nanocapsules containing leuco-dye mixture and spiropyran
پديدآورندگان :
sanjabi samira Polymer Science Department, Iran Polymer and Petrochemical Institute , Keyvan Rad Jaber Polymer Science Department, Iran Polymer and Petrochemical Institute , Salehi-Mobarakeh Hamid Polymer Science Department, Iran Polymer and Petrochemical Institute , Mahdavian Ali Reza Polymer Science Department, Iran Polymer and Petrochemical Institute
كليدواژه :
spiropyran , leuco , dye , photoresponsivity , thermochromic , nanocapsule
عنوان كنفرانس :
پانزدهمين همايش بين المللي علوم و فناوري پليمر
چكيده فارسي :
In this study, leuco-dye with spirolactone structure and hydroxyl-functionalized spiropyran (SPOH) were synthesized and coencapsulated with bisphenol A and tetradecanol (TDH), or dodecanol (DDH) into a crosslinked polymethyl methacrylate substrate through miniemulsion polymerization. The generated nanocapsules containing TDH (TPL@T) and DDH (TPL@D) had spherical and smooth morphology with an average particle size of 109–120 nm. The coated TPL@D and TPL@T nanocapsules on cellulose substrate displayed thermo-switchable color shifts between deep red and colorless. In addition, upon UV irradiation at 365 nm, the coated nanocapsules on cellulose showed color change from colorless to purple. Reversible thermo- and photo-switching of the prepaed nanocapsules over 10 cycles of UV-vis and heating-cooling cycles demonstrated their effectiveness for use in anti-counterfeiting systems.
