Abstract
In this study, it was to investigate the swelling performance of novel biohybrid composite hydrogel sorbents containing acrylamide/potassium 3-sulfopropyl methacrylate/sodium alginate/bentonite in water and binary mixtures of water-solvent. Novel hydrogels were synthesized with free radical solution polymerization by using ammonium persulfate/N,N,N’,N’-tetramethylethylenediamine as redox initiating pair in presence of poly(ethylene glycol) diacrylate as crosslinker. Swelling experiments were performed in water and binary mixtures of water-solvent (acetone, methanol and tetrahydrofuran) at 25°C, gravimetrically. Some swelling and diffusion properties of the hydrogels were calculated and they were discussed for the biohybrid/hybrid hydrogel systems prepared under various formulations. It has been seen the lower equilibrium percentage swelling ratio values (62% - 124%) in all solvent compositions in comparison with the equilibrium percentage swelling ratio values in water (718% - 2055%). Consequently, the hydrogel systems developed in this study could serve as a potential device for water and water-solvent binary mixtures.
Highlights
The water, some solvents such as ACE, MET and THF, or some liquids such as water-solvent binary mixtures intake of initially dry hydrogels was followed for novel AAm/KSM hydrogels, AAm/KSM/SAL semi IPNs, AAm/KSM/BENT hybrid hydrogels, and AAm/KSM/SAL/BENT biohybrid hydrogels
There have been presented the photographs of AAm/KSM hydrogels and AAm/KSM/BENT/SAL hybrid composite hydrogels in Figure 1(b) as dry state or swollen state
The present work has given the quantitative information on the swelling characteristic of AAm/KSM hydrogels, AAm/KSM/SAL semi IPNs, AAm/KSM/BENT hybrid composite hydrogels and AAm/KSM/BENT/SAL biohybrid composite hydrogels in water and in binary mixtures of water-solvent
Summary
Polymer/clay or polymer/zeolite hybrid composite polymeric systems have received great attention because of their relatively low production cost and high adsorption capacity for water, dyes and metals [1]-[8]. A hydrogel can be defined as a polymeric material that exhibits the ability to swell in water and retains a significant fraction of water within its structure without dissolving. Swelling or water sorption property of hydrogels accounts for a great number of biomedical and technological applications. When a non-water-miscible solvent is added to the water-swollen hydrogel, it often shrinks or collapses. Depending on the gel chemical structure, the solvent nature and water-solvent composition, the gel shrinkage may be gradual (continuous) or abrupt (discontinuous) [13]-[20]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
