A facile method for the preparation of sodium alginate（SA）/carboxyl-functionalized graphene（G-COOH）composite hydrogel was developed. Based on the coordination ability of lanthanide ions to the carboxyl groups, a s...A facile method for the preparation of sodium alginate（SA）/carboxyl-functionalized graphene（G-COOH）composite hydrogel was developed. Based on the coordination ability of lanthanide ions to the carboxyl groups, a series of hydrogel derived from different ratios of SA and G-COOH was fabricated by neodymium（Nd3＋） ions coordination. A relatively uniform layered structure was recorded by SEM at the interior of SA/G-COOH hydrogel. Several parameters such as water content, swelling ratio（SR）, tensile test and solvent resistance were also investigated. The SA/G-COOH composite hydrogel showed excellent mechanical strength, and the tensile strength of SA/G-COOH composite hydrogel reaches 53.72 MPa at high water content. Due to the coordination ability of Nd3＋ ions, the hydrogel also exhibited an excellent solvent resistance and stability.展开更多
基金supported by the National Natural Science Foundation of China under Grant Nos.21274020 and 21304019
文摘A facile method for the preparation of sodium alginate（SA）/carboxyl-functionalized graphene（G-COOH）composite hydrogel was developed. Based on the coordination ability of lanthanide ions to the carboxyl groups, a series of hydrogel derived from different ratios of SA and G-COOH was fabricated by neodymium（Nd3＋） ions coordination. A relatively uniform layered structure was recorded by SEM at the interior of SA/G-COOH hydrogel. Several parameters such as water content, swelling ratio（SR）, tensile test and solvent resistance were also investigated. The SA/G-COOH composite hydrogel showed excellent mechanical strength, and the tensile strength of SA/G-COOH composite hydrogel reaches 53.72 MPa at high water content. Due to the coordination ability of Nd3＋ ions, the hydrogel also exhibited an excellent solvent resistance and stability.
