Properties of the photochromic latexes based on spiropyran by emulsion polymerization

Ting Zhang1, 2, Liuwa Fu1, Zhikang Chen1, Yanyan Cui1, Xiaoxuan Liu1*

1Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China

2College of Chemistry and Environment, Minnan Normal University, Zhangzhou, Fujian 363000, China

Adv. Mater. Lett., 2018, 9 (2), pp 97-100

DOI: 10.5185/amlett.2018.1677

Publication Date (Web): May 16, 2018

E-mail: p-xxliu@gdut.edu.cn

Abstract


The latexes based on 2-(3’, 3’-Dimethyl-6-nitro-3’H-spiro[chromene-2,2’-indol]-1’-yl)ethanol(SPOH) were prepared via emulsion polymerization, using a macromolecular surfactant that copolymerized by methyl methacrylate (MMA), butyl acrylate (BA) and acrylic acid (AA). The photochromism of the latexes was characterized by UV-vis spectroscopy. Through the characterization of DLS and SEM, the sizes and morphological of the latexes were studied before and after UV light irradiation. During the thermal fading process, it appeared continuous variable pattern in the emulsion, which was related to the rearrangement of the stimulated latexes to meet the dynamic balance of ionic strength, due to the reversible isomerization of spirogyra.

Keywords

Spiropyran, photochromic, latex, macromolecular surfactant, aggregates.

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