当前位置：
X-MOL 学术
›
Mater. Chem. Front.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Self-healing hybrids fabricated by metal complexation with imidazole-containing silsesquioxane nanoparticles
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2020-07-08 , DOI: 10.1039/d0qm00225a Yusuke Sasaki 1, 2, 3, 4, 5 , Hideharu Mori 1, 2, 3, 4, 5
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2020-07-08 , DOI: 10.1039/d0qm00225a Yusuke Sasaki 1, 2, 3, 4, 5 , Hideharu Mori 1, 2, 3, 4, 5
Affiliation
|
Simultaneous achievement of self-healing ability and material hardness in materials is challenging because these properties are contradictory. In this study, we designed self-healable hybrids based on organic–inorganic silsesquioxane nanoparticles (SQ-NPs) having imidazole and n-alkyl groups in a single arm. The imidazole moiety acted as a self-healing motif via dynamic metal–ligand (zinc–imidazole) interactions while the n-alkyl functional groups act as a flexible unit to manipulate the chain mobility. Three imidazole-containing SQ-NPs having different n-alkyl chains were prepared by thiol–epoxy click reaction followed by esterification. X-ray diffraction, scanning force microscopy, thermogravimetric analysis, and differential scanning calorimetry measurements revealed the formation of SQ-NPs (< 5 nm) with relatively narrow size distributions and no aggregation and manipulated thermal properties. The zinc/imidazole-based hybrids prepared by the complexation of the imidazole-containing SQ-NPs with ZnCl2 exhibited a high degree of tunability (Young's modulus in the range of 0.56–2.13 GPa) with good self-healing efficacy (recovered 80% of inherent mechanical properties at 50 °C for 24 h), which was attributable to the healing nature of the rapid exchange of zinc–imidazole interactions, in addition to amorphous SQ-NP mobility.
中文翻译：
通过与含咪唑的倍半硅氧烷纳米粒子的金属络合制备的自愈杂种
同时实现材料中的自愈能力和材料硬度具有挑战性，因为这些特性是矛盾的。在这项研究中，我们基于单臂中具有咪唑和正烷基的有机-无机倍半硅氧烷纳米颗粒（SQ-NPs）设计了可自我修复的杂种。咪唑部分通过动态的金属-配体（锌-咪唑）相互作用充当自我修复基序，而正烷基官能团则充当控制链迁移性的柔性单元。三种具有不同n的含咪唑的SQ-NP-烷基链通过硫醇-环氧点击反应，然后酯化制备。X射线衍射，扫描力显微镜，热重分析和差示扫描量热法测量表明，SQ-NPs（<5 nm）的形成具有相对窄的尺寸分布，并且没有聚集和可操纵的热性能。通过将含咪唑的SQ-NP与ZnCl 2络合制备的锌/咪唑基杂化物表现出高度的可调谐性（杨氏模量在0.56-2.13 GPa范围内），具有良好的自我修复功效（回收率达80％）在50°C持续24 h时具有固有的机械性能），这归因于锌与咪唑相互作用快速交换的愈合特性，以及无定形SQ-NP的迁移性。
更新日期：2020-08-27
中文翻译：
通过与含咪唑的倍半硅氧烷纳米粒子的金属络合制备的自愈杂种
同时实现材料中的自愈能力和材料硬度具有挑战性，因为这些特性是矛盾的。在这项研究中，我们基于单臂中具有咪唑和正烷基的有机-无机倍半硅氧烷纳米颗粒（SQ-NPs）设计了可自我修复的杂种。咪唑部分通过动态的金属-配体（锌-咪唑）相互作用充当自我修复基序，而正烷基官能团则充当控制链迁移性的柔性单元。三种具有不同n的含咪唑的SQ-NP-烷基链通过硫醇-环氧点击反应，然后酯化制备。X射线衍射，扫描力显微镜，热重分析和差示扫描量热法测量表明，SQ-NPs（<5 nm）的形成具有相对窄的尺寸分布，并且没有聚集和可操纵的热性能。通过将含咪唑的SQ-NP与ZnCl 2络合制备的锌/咪唑基杂化物表现出高度的可调谐性（杨氏模量在0.56-2.13 GPa范围内），具有良好的自我修复功效（回收率达80％）在50°C持续24 h时具有固有的机械性能），这归因于锌与咪唑相互作用快速交换的愈合特性，以及无定形SQ-NP的迁移性。
京公网安备 11010802027423号