Liu Gui-Xiang, Yang Ya-Dong, Zhu Ding, Wei Yan-Chan, Liao Shuangquan, Luo Mingchao
Laboratory of Advanced Materials of Tropical Island Resources, Ministry of Education, Hainan University, Haikou 570228, China.
School of Materials Science and Engineering, Hainan University, Haikou 570228, China.
Polymers (Basel). 2021 Feb 4;13(4):493. doi: 10.3390/polym13040493.
The ability of long-term thermo-oxidative resistance is very important for elastomers in application. However, many conventional antioxidants are difficult to realize the long-term thermo-oxidative resistance. To overcome this limitation, a design strategy is introduced by combing elastomers with MXene and natural rubber (NR) is chosen as a model material. MXene is efficient in absorbing oxygen and the generated free radicals in the NR matrix and can inhibit the diffusion of oxygen toward the interior. Moreover, MXene, like graphene and carbon black, absorbs molecular chains, inhibiting the migration of MXene toward the surface of the sample. Such characteristics of MXene endow NR/MXene with the long-term outstanding thermo-oxidative resistance. For example, after three days of the thermo-oxidative process for NR/MXene, the tensile strength is 19 MPa and the retention of tensile strength is 63%, which far exceeds the effects of conventional antioxidants. This work not only provides a good guide for the universal design of elastomers with long-term thermo-oxidative resistance but also expands the application of MXene.
长期抗热氧化能力对于弹性体在实际应用中非常重要。然而，许多传统抗氧化剂难以实现长期抗热氧化性能。为克服这一限制，引入了一种设计策略，将弹性体与MXene相结合，并选择天然橡胶（NR）作为模型材料。MXene能有效吸收NR基体中的氧气和产生的自由基，并可抑制氧气向内部扩散。此外，与石墨烯和炭黑一样，MXene会吸附分子链，抑制MXene向样品表面迁移。MXene的这些特性赋予NR/MXene长期优异的抗热氧化性能。例如，经过三天的热氧化过程后，NR/MXene的拉伸强度为19MPa，拉伸强度保留率为63%，远远超过传统抗氧化剂的效果。这项工作不仅为具有长期抗热氧化性能的弹性体通用设计提供了良好指导，还拓展了MXene的应用。
