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首页> 外文期刊>ACS Macro Letters >Super Tough, Ultrastretchable, and Thermoresponsive Hydrogels with Functionalized Triblock Copolymer Micelles as Macro-Cross- Linkers
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Super Tough, Ultrastretchable, and Thermoresponsive Hydrogels with Functionalized Triblock Copolymer Micelles as Macro-Cross- Linkers

机译：具有功能化的Triblock共聚物胶束作为宏观交联剂的超韧性，超拉伸性和热响应性水凝胶

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摘要

Vinyl-functionalized thermosensitive Pluronic F127 micelles have been used as multifunctional cross-links for the synthesis of super tough, highly resilient and thermoresponsive nanomicelle (NM) hydrogels. Pluronic F127 diacrylate (F127DA) with vinyl groups on both ends selfassembled in aqueous solution into micelles. Such micelles served as multifunctional macro-cross-links to copolymerize with acrylamide (AAm) monomers, generating novel NM hydrogels with extraordinary tensile and compressive properties, without using any chemical cross-linkers. Uniaxial tensile tests demonstrated a fracture strain above 2265%, an ultimate stress of 276 kPa, and a fracture energy of 2.34 MJ/m~3. Under compression tests, these hydrogels did not fracture up to 98% strain and 62 MPa stress. Cyclic compressive loading-unloading tests at 90% strain showed no decay of the hyseteresis energy, indicating an unprecedented fatigue resistance.
机译：乙烯基官能化的热敏Pluronic F127胶束已用作多功能交联剂，用于合成超韧，高弹性和热响应性纳米胶束（NM）水凝胶。两端带有乙烯基的Pluronic F127二丙烯酸酯（F127DA）在水溶液中自组装成胶束。此类胶束充当多功能大分子交联剂，与丙烯酰胺（AAm）单体共聚，生成了具有非凡拉伸和压缩特性的新型NM水凝胶，而无需使用任何化学交联剂。单轴拉伸试验表明，断裂应变超过2265％，极限应力为276 kPa，断裂能为2.34 MJ / m〜3。在压缩测试下，这些水凝胶在高达98％的应变和62 MPa的应力下均不会断裂。在90％应变下的循环压缩加载/卸载测试显示，磁滞能量没有衰减，这表明它具有前所未有的疲劳强度。

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