Bubble-Channeling Electrophoresis of Honeycomb-Like Chitosan Composites

Overview

Journal Adv Sci (Weinh)

Specialty Biomedical Engineering

Date 2022 Sep 30

PMID 36180403

Authors

Bo-Han Huang

Li-Jie Chen

Yu-Jie Chiou

Grace Whang

Yunkai Luo

Yichen Yan

Kung-Hwa Wei

Ximin He

Bruce Dunn

Pu-Wei Wu

Affiliations

Soon will be listed here.

Abstract

A chitosan composite with a vertical array of pore channels is fabricated via an electrophoretic deposition (EPD) technique. The composite consists of chitosan and polyethylene glycol, as well as nanoparticles of silver oxide and silver. The formation of hydrogen bubbles during EPD renders a localized increase of hydroxyl ions that engenders the precipitation of chitosan. In addition, chemical interactions among the constituents facilitate the establishment of vertical channels occupied by hydrogen bubbles that leads to the unique honeycomb-like microstructure; a composite with a porosity of 84%, channel diameter of 488 µm, and channel length of 2 mm. The chitosan composite demonstrates an impressive water uptake of 2100% and a two-stage slow release of silver. In mass transport analysis, both Disperse Red 13 and ZnO powders show a much enhanced transport rate over that of commercial gauze. Due to its excellent structural integrity and channel independence, the chitosan composite is evaluated in a passive suction mode for an adhesive force of 9.8 N (0.56 N cm ). The chitosan composite is flexible and is able to maintain sufficient adhesive force toward objects with different surface curvatures.

Citing Articles

Bubble-Channeling Electrophoresis of Honeycomb-Like Chitosan Composites.

Huang B, Chen L, Chiou Y, Whang G, Luo Y, Yan Y Adv Sci (Weinh). 2022; 9(32):e2203948.

PMID: 36180403 PMC: 9661845. DOI: 10.1002/advs.202203948.

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