PVA/Agar Interpenetrating Network Hydrogel with Fast Healing, High Strength, Antifreeze, and Water Retention,Macromolecular Chemistry and Physics

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PVA/Agar Interpenetrating Network Hydrogel with Fast Healing, High Strength, Antifreeze, and Water Retention
Macromolecular Chemistry and Physics ( IF 2.5 ) Pub Date : 2020-10-08 , DOI: 10.1002/macp.202000237
Xin Han ₁ , Mengyu Li ₂ , Zewen Fan ₁ , Yu Zhang ₁ , Huihui Zhang ₁ , Qiaoling Li ₁

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Traditional self‐healing hydrogels have great application prospects in biological engineering because of their extremely high water content, but their durability cannot be easily guaranteed. Therefore, developing a rapid self‐healing hydrogel with long‐lasting water retention capacity is still a significant challenge. A high‐strength and fast self‐healing hydrogel with an interpenetrating double network based on polyvinyl alcohol/agar‐ethylene glycol (PVA/agar‐EG) is proposed. Polyvinyl alcohol (PVA) and agar are designed for the construction of the interpenetrating network. Furthermore, the introduction of a borate‐bonding dynamic action mode affords the hydrogel with extraordinary mechanical strength and rapid self‐healing. The addition of EG as a traveling solvent enables the sample to retain water and prevents freezing in harsh environments, including at high temperatures of 80 °C and extremely low temperatures of −40 °C. Additionally, owing to the intelligent remolding ability of the PVA/agar‐EG hydrogel, the material can be recycled to prolong the service life of the hydrogel. Overall, the PVA/agar‐EG hydrogel developed in this study can provide a new general strategy for the development of intelligent self‐healing devices, and hydrogels can be applied in complex environmental engineering.

中文翻译：

具有快速修复，高强度，防冻和保水功能的PVA /琼脂互穿网络水凝胶

传统的自修复水凝胶因其极高的水含量而在生物工程中具有广阔的应用前景，但其耐用性难以保证。因此，开发具有持久保水能力的快速自修复水凝胶仍然是一项重大挑战。提出了一种高强度，快速自愈水凝胶，该水凝胶具有基于聚乙烯醇/琼脂乙二醇（PVA /琼脂EG）的互穿双网络。聚乙烯醇（PVA）和琼脂是为构建互穿网络而设计的。此外，引入了硼酸盐键动态作用模式，使水凝胶具有非凡的机械强度和快速的自愈能力。加入EG作为行进溶剂可以使样品保留水分并防止在恶劣环境下冻结，包括80°C的高温和−40°C的极低温度。此外，由于PVA /琼脂EG水凝胶的智能重塑能力，该材料可以回收利用，以延长水凝胶的使用寿命。总体而言，本研究开发的PVA /琼脂EG水凝胶可为智能自愈设备的开发提供新的一般策略，并且水凝胶可用于复杂的环境工程中。

更新日期：2020-11-19

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