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| 蒙脱土纳米片增强的仿生结构强韧水凝胶薄膜 |
| Montmorillonite nanosheet reinforced biomimetic structure strong hydrogel film |
| 投稿时间：2024-01-10 修订日期：2024-03-05 |
| DOI： |
| 中文关键词: 聚乙烯醇 蒙脱土 纳米片 水凝胶 薄膜材料 |
| 英文关键词:Polyvinyl alcohol Montmorillonite Nanosheet Hydrogel Thin film materials |
| 基金项目:国家自然科学基金项目（22305254） |
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| 中文摘要: |
| 传统单网络水凝胶力学性能差，难以作为对力学强度和综合性能方面有高要求的硬脑膜修复材料使用。提高水凝胶的力学性能对于水凝胶的应用具有重要意义。本文通过蒸发诱导组装方法制备了聚乙烯醇/蒙脱土（PVA/MMT）水凝胶薄膜，该水凝胶薄膜具有优异的机械性能和抗疲劳性能。所制备的PVA/MMT水凝胶薄膜厚度为200 - 300 μm之间，断裂应力为9.5 ± 0.2 MPa、模量为9.0 ± 0.9 MPa、疲劳强度为1154.02 J?m-2，性能优于现有的生物聚合物水凝胶。加入蒙脱土（MMT）后，PVA/MMT水凝胶薄膜的机械性能得到提升。这得益于MMT在PVA/MMT水凝胶薄膜中形成有序的层状结构。PVA70/MMT30水凝胶薄膜借助戊二醛交联后，PVA和MMT之间形成C-O-C共价键，促使薄膜的机械性能进一步提高。 |
| 英文摘要: |
| The traditional single-network hydrogel has poor mechanical properties, and it is difficult to use it as a dural repair material with high requirements for mechanical strength and comprehensive properties. Improving the mechanical properties of hydrogels is of great significance for the application of hydrogels. In this paper, polyvinyl alcohol/montmorillonite (PVA/MMT) hydrogel films were prepared by evaporation-induced assembly method, which had excellent mechanical properties and fatigue resistance. The thickness of the prepared PVA/MMT hydrogel film is between 200 and 300 μm, the breaking stress is 9.5 ± 0.2 MPa, the modulus is 9.0 ± 0.9 MPa, and the fatigue strength is 1154.02 J?m-2, which is better than the existing biopolymer hydrogels. After the addition of montmorillonite (MMT), the mechanical properties of PVA/MMT hydrogel films were improved. This is due to the formation of an ordered layered structure in the PVA/MMT hydrogel film by MMT. After the PVA70/MMT30 hydrogel film that is crosslinked with glutaraldehyde, a C-O-C covalent bond is formed between PVA and MMT, which further improves the mechanical properties of the film. |
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