光固化时间如何优化？AAm与LAP含量调控对3D打印水凝胶性能影响分析

2.2.1 Photocuring Time With the increase in AAm or LAP content, the photocuring time showed a decreasing trend (Fig. 1c, d). This result indicates that by adjusting the amounts of AAm or LAP, the concentration of free radicals and the chain growth rate in the polymerization reaction can be effectively controlled, thereby modulating the reaction kinetics of the photopolymerization system. Additionally, the study by Yongji He et al. [15] confirmed that when the AAm content is 10% and the LAP content is 0.2%, the hydrogel not only achieves rapid photocuring but also exhibits excellent compressive strength (345 kPa), tensile strength (183 kPa), and low swelling characteristics to enhance the morphological fidelity of 3D-printed structures. Therefore, considering both photocuring efficiency and material properties, this study selected AAm and LAP percentages of 40.68% and 0.58%, respectively, as the baseline formulation for subsequent experiments. The photocuring time for this formulation is approximately 1 minute (Fig. 1e).