Preparation and the swelling properties of sodium alginate graft poly (acrylic acid‐co‐2‐acrylamide‐2‐methyl propane sulfonic acid)/graphene oxide hydrogel composite

Abstract

Sodium alginate graft poly (acrylic acid‐co‐2‐acrylamide‐2‐methyl propane sulfonic acid)/graphene oxide (SA‐g‐P(AA‐co‐AMPS)/GO) hydrogel composite is prepared. The composite is characterized by infrared (IR) spectroscopy, X‐ray diffraction (XRD), high‐resolution scanning electron microscope (HRSEM), and differential scanning calorimetry (DSC). The swelling properties of the composite are investigated. GO acts as part of the cross‐linking points, which improves the swelling property of the composite. Maximal amount of absorption capacity in water and 0.9% NaCl is 862.3 and 164.7 g/g, respectively, with a GO content of 5 wt% of total mass of monomers. However, the absorption of water and 0.9% NaCl is only 390.3 and 52.5 g/g, respectively, without the incorporation of GO. Water retention properties of the composite are also tested.

Sodium Alginate-g-acrylamide/acrylic Acid Hydrogels Obtained by Electron Beam Irradiation for Soil Conditioning

“…For a better view of the rough appearance of the surfaces, we have chosen to present images captured at the magnifications of 1000 (a2 and b2) and 5000 (a3 and b3). The increased sizes of crack-like structures that more space for solution Surfaces presented in Figure 15a1,b1 and Figure 16a1,b1 are rugged and loose with uneven interspaces, favorable for water molecules to get inside [54,55], an aspect that correlates with the high degrees of absorption in both types of solutions. For a better view of the rough appearance of the surfaces, we have chosen to present images captured at the magnifications of 1000 (a2 and b2) and 5000 (a3 and b3).…”

“…The increased sizes of crack-like structures that provide more space for solution In Figures 15 and 16 are presented SEM micrographs of H2R1-D1 and H1R2-D2 hydrogels dried after the fourth absorption-release cycle in both types of aqueous solution with nutrients. Surfaces presented in Figures 15a1,b1 and 16a1,b1 are rugged and loose with uneven interspaces, favorable for water molecules to get inside [54,55], an aspect that correlates with the high degrees of absorption in both types of solutions. For a better view of the rough appearance of the surfaces, we have chosen to present images captured at the magnifications of 1000 (a2 and b2) and 5000 (a3 and b3).…”

“…For a better view of the rough appearance of the surfaces, we have chosen to present images captured at the magnifications of 1000 (a2 and b2) and 5000 (a3 and b3). The increased sizes of crack-like structures that provide more space for solution penetration correlated with the high degree of absorption that can be seen [54,55].…”

Superabsorbent polymer composites derived from polyacrylic acid: Design and synthesis, characterization, and swelling capacities

“…They are able to absorb water without dissolving, exceeding 1000- to 1500-fold their dry weight. 4 -11…”

“…They are able to absorb water without dissolving, exceeding 1000-to 1500-fold their dry weight. [4][5][6][7][8][9][10][11] Due to such significant properties, the SAPs are produced for different applications. For example, they are used in disposable baby diapers, 12,13 agriculture as soil amendments, 14,15 coal dewatering, 16 controlled release of drugs as carriers, 17,18 cosmetics 19 and absorbent pads, and wastewater treatment.…”