S. Turk, B. Ãœnlü, and M. . S. . Mustapa, “Preparation of Innovative PEG/Tannic Acid/TiO2 Hydrogels and Effect of Tannic Acid Concentration on Their Hydrophilicity ”, IJIE, vol. 13, no. 7, pp. 266–273, Sep. 2021, Accessed: Aug. 07, 2026. [Online]. Available: https://journal.uthm.edu.my/index.php/ijie/article/view/9643