title: Non-covalent assembly of poly(allylamine hydrochloride)/triethylamine microcapsules with ionic strength-responsiveness and auto-fluorescence.
abstract: Ionic strength-responsive microcapsules with auto-fluorescence were fabricated by incubation of poly(allylamine hydrochloride) (PAH)-doped CaCO3particles in triethylamine (Et3N), followed by core removal using HCl. Based on the combination of hydrophobic interaction and hydrogen bonding, PAH and Et3N formed a complex with a molar ratio of 3:1 (repeating unit of PAH: Et3N). The as-prepared capsules showed extraordinary stability against 1M HCl, 1M NaOH and 6M urea solutions, and could swell or shrink reversibly in response to the ionic strength. Furthermore, the capsules possessed auto-fluorescence, allowing easily tracking of capsules during applications. Such interaction may be expanded to formation of stimuli-responsive multilayer films and other colloidal particles.
authors.affiliation: MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University in Hangzhou, 310027, China.
authors.forename: Huiying
authors.initials: H
authors.lastname: Li
authors.affiliation: MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University in Hangzhou, 310027, China.
authors.forename: Honghao
authors.initials: H
authors.lastname: Zheng
authors.affiliation: MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University in Hangzhou, 310027, China. Electronic address: tongwj@zju.edu.cn.
authors.forename: Weijun
authors.initials: W
authors.lastname: Tong
authors.affiliation: MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University in Hangzhou, 310027, China. Electronic address: cygao@zju.edu.cn.
authors.forename: Changyou
authors.initials: C
authors.lastname: Gao
keywords: Auto-fluorescence; Capsules; Hydrophobic interaction; Poly(allylamine hydrochloride); Triethylamine