Lee Kyoung Min, Jeong Songah, Park Jieun, Kim Hyungwoo
School of Polymer Science and Engineering & Alan G. MacDiarmid Energy Research Institute, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea.
ACS Omega. 2021 Sep 24;6(39):25623-25630. doi: 10.1021/acsomega.1c03690. eCollection 2021 Oct 5.
This paper describes a conceptual design of hierarchical composite hydrogels. The hydrogel materials comprise MoS flakes and interpenetrating polymer networks, and further exhibit controlled release and tunable strength that are caused by the synergistic combination of select components. In terms of design, MoS flakes initiate radical polymerization of chosen monomers and simultaneously provide physical cross-linking points, both of which afford a primary composite network. Then, the sequential formation of additional networks results in functional, hierarchical, composite hydrogels. Therefore, we were able to demonstrate double-network hydrogels as a stimuli-responsive vector for programmed release of cargo molecules in response to heat or light or to form triple-network hydrogels showing tunable mechanical strength owing to intermolecular interaction between charged monomers and MoS flakes. The design concept would be expanded by incorporating other chalcogenides or functional monomers, which advance the properties and functionalities of materials and broadens the versatility of nanocomposite hydrogels.
本文描述了一种分级复合水凝胶的概念设计。水凝胶材料由二硫化钼薄片和互穿聚合物网络组成，并且进一步表现出由特定组分的协同组合所导致的控释和可调强度。在设计方面，二硫化钼薄片引发所选单体的自由基聚合，同时提供物理交联点，这两者共同形成一个初级复合网络。然后，额外网络的顺序形成产生了功能性、分级的复合水凝胶。因此，我们能够证明双网络水凝胶作为一种刺激响应载体，可响应热或光对货物分子进行程序性释放，或者形成由于带电单体与二硫化钼薄片之间的分子间相互作用而具有可调机械强度的三网络水凝胶。通过引入其他硫族化物或功能单体来扩展设计概念，这将提升材料的性能和功能，并拓宽纳米复合水凝胶的多功能性。
