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Preparation and Characterization of Sodium Alginate and Polyquaternium‐10 Hollow Microcapsules by a Layer‐by‐Layer Self‐Assembly Technique
Author(s) -
Wang Min,
Zhang Huihui,
Shao Huili,
Yang Gesheng
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202003193
Subject(s) - fourier transform infrared spectroscopy , scanning electron microscope , polyelectrolyte , thermogravimetric analysis , materials science , chemical engineering , monolayer , zeta potential , transmission electron microscopy , layer by layer , chitosan , layer (electronics) , nanotechnology , composite material , polymer , nanoparticle , engineering
Novel micro‐scaled hollow capsules were obtained by consecutively adsorbing oppositely‐charged polyelectrolytes of sodium alginate (ALG) and polyquaternium‐10 (PQ‐10) on biocompatible porous calcium carbonate (CaCO 3 ) microspheres, followed by the subsequent removal of the CaCO 3 template using acetic acid. The properties of the microcapsules were characterized at various stages of the preparation procedure by using a zeta potential analyzer, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TG) and confocal laser scanning microscopy (CLSM). The results demonstrated that ALG and PQ‐10 were successfully assembled on the surface of the CaCO 3 microspheres, and the resulting hollow microcapsules exhibited spherical morphology with typical folds by SEM observations. Furthermore, TEM observations indicated that the average thickness of the monolayer film was ∼1–2 nm, and CLSM results revealed that the microcapsules possessed selective permeability for different charged molecules.