CO sub(2)-responsive swelling behavior and metal-ion adsorption properties in novel histamine-conjugated polyaspartamide hydrogel

• Published in: Journal of applied polymer science Vol. 133; no. 16; p. np
• Main Authors: Tran, Ngoc Bich, Kim, Jae Yun, Kim, Youn-Chul, Kim, Young Jun, Kim, Ji-Heung
• Format: Journal Article
• Language: English
• Published: 01.04.2016
• Subjects: Adsorption; Carbon dioxide; Copolymers; Crosslinking; Histamines; Hydrogels; Jewelry; Swelling
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.43305

Novel polyaspartamide copolymers containing histamine pendants (PHEA-HIS) were prepared from polysuccinimide, which is the thermal polycondensation product of aspartic acid, via a successive ring-opening reaction using histamine (HIS) and ethanolamine (EA). The prepared water-soluble copolymer was then crosslinked by reacting it with hexamethylene diisocyanate in order to provide a hydrogel with both good gel strength and reversible CO sub(2) absorption characteristics. PHEA-HIS gel is also pH-sensitive and eligible to coordinate to metal ions such as Pb super(2+), Cu super(2+), and Ni super(2+) due to the imidazole units in its structure. The CO sub(2)-responsive swelling behavior, metal-ion adsorption, and morphology of the crosslinked gels were investigated. The approach described here results is a promising hydrogel with potential for a variety of industrial and biomedical applications including CO sub(2) capture, CO sub(2)-responsive and switchable sensors, and smart drug delivery systems. J. Appl. Polym. Sci. 2016, 133, 43305.