Development of Dissipative Particle Dynamics framework for modeling hydrogels with degradable bonds
Development of Dissipative Particle Dynamics framework for modeling hydrogels with degradable bonds
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DOI：
10.1557/adv.2020.148
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发表时间：
2020-03
期刊：
影响因子：
0.8
通讯作者：
Vaibhav Palkar;C. K. Choudhury;O. Kuksenok
中科院分区：
文献类型：
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作者：
Vaibhav Palkar;C. K. Choudhury;O. Kuksenok
水凝胶的受控降解使得这些材料具有多种应用，包括受控药物和细胞释放应用以及神经网络的定向生长。这些应用激发了对模拟框架的需求，用于对水凝胶中的受控降解进行建模。我们开发了用于水凝胶降解的耗散粒子动力学（DPD）框架。作为模型水凝胶，我们制备了由末端连接的四臂聚乙二醇前体形成的网络。我们将这种水凝胶降解过程中的键断裂建模为随机过程。可降解键的比例遵循一级降解动力学。我们描述了降解过程中的质量损失率。
Controlled degradation of hydrogels enables several applications of these materials, including controlled drug and cell release applications and directed growth of neural networks. These applications motivate the need of a simulation framework for modeling controlled degradation in hydrogels. We develop a Dissipative Particle Dynamics (DPD) framework for hydrogel degradation. As a model hydrogel, we prepare a network formed by end-linking tetra-arm polyethylene glycol precursors. We model bond breaking during degradation of this hydrogel as a stochastic process. The fraction of degradable bonds follows first order degradation kinetics. We characterize the rate of mass loss during degradation process.