| Autor: |
Mohammadhashemi, Zohreh, Zohuriaan-Mehr, Mohammad Jalal, Jahanmardi, Reza |
| Předmět: |
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| Zdroj: |
Polymer Bulletin; Jul2023, Vol. 80 Issue 7, p8045-8065, 21p |
| Abstrakt: |
As commercial superabsorbent polymer (SAP) hydrogels do not possess antimicrobial activity, the bioactivity induction is a research target to increase their diverse benefits, particularly, in their bio-applications. This work reports a facile and nearly quantitative synthesis of a novel partially bio-based Schiff base modifier (an imine-amine modifying agent based on furfural) under catalyst-free and solvent-free conditions. The modifier was identified by FTIR, 1H- and 13C-NMR spectroscopies. Then, a commercial SAP was feasibly surface modified by the modifier via a facile transamidation process followed by additional modification with copper (II) acetate to form Cu-coordination complex on the gel network (Ai: intact SAP, A1: modified with Schiff base, A2: modified with coordination complex, and A3: modified with copper (II) acetate). The modification reactions were confirmed morphologically and rheologically. The free-swelling measurements in deionized water and saline media revealed that the super absorbency was well-preserved after the modification. The saline-absorbency under load (AUL, 0.3 psi) tests verified that the modified samples owned 5–17% higher AUL compared to the unmodified sample. Antibacterial measurements against two bacterial strains (S. aureus and E. coli) proved that the metal complex formation significantly induces antibacterial activity comparing to both the intact and the metal-free Schiff-base-treated SAPs. The feasible processes and/or modified products may be considered for being used in bio-medical applications such as surgical pads and wound dressings. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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