2 hydroxy 2 methyl 1 phenyl 1 propanone irgacure 1173

2-hydroxy-2-methyl-1-phenyl-1-propanone (Irgacure 1173, 98%) was purchased from Sigma-Aldrich (St. Louis, MO, USA), and Laponite XLG was purchased from BYK Additives and Instruments (Wesel, Germany). N-acryloyl glycinamide (NAGA) was purchased from Zhengzhou Alfa Chemical Co., Ltd (Zhengzhou, China). GelMa, TA, and 1,1-Diphenyl-2-picrylhydrazyl (DPPH) were purchased from Aladdin Co., Ltd (Shanghai, China).

Gelatin (Type A from porcine, 300 g bloom, Sigma-Aldrich, USA), methacrylic anhydride (98%, Sigma-Aldrich, USA), 2-hydroxy-2-methyl-1-phenyl-1-propanone (IRGACURE 1173, 98%, Sigma-Aldrich, USA), agarose (Electrophoretic grade, 750 g cm⁻², Yuanye, China), sodium alginate (low viscosity, Sigma-Aldrich, USA) green tea polyphenols (TP, 98%, ENERGY, China), tannic acid (Aladdin, China), calcium chloride (Kermel, China), sodium hydroxide (Kermel, China), and urea (Kermel, China), were used as received. All the other reagents are of analytical grade and used without further purification.

Gelatin (from porcine skin, Type A, powder, gel strength 240~270 Bloom) was purchased from Yeasen (Shanghai, China), methacrylic anhydride (MA), and 2-hydroxy-2-methyl-1-phenyl-1-propanone (IRGACURE 1173, 98%) were purchased from Sigma Aldrich (USA), Laponite XLG (LPN) was purchased from BYK (UK), NAGA was purchased from Zhengzhou Alfa Chemical Co., Ltd (Zhengzhou, China). TA and 1,1-diphenyl-2-picrylhydrazyl (DPPH) were purchased from Aladdin Co., Ltd (Shanghai, China). 2,2-azinobis (3-ethylbenzothiazoline -6-sulfonic acid mmonium salt) (ABTS), potassium persulfate (K₂S₂O₈), 2-Phenyl-4,4,5,5- tetramethylimidazoline-3-oxide-1-oxyl (PTIO), and borax were purchased from Beijing Innochem Science and Technology., Ltd (China).