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The synergistic effect of nitrile and jeffamine structural elements towards stretchable and high-k neat polyimide materials
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2021-08-18 , DOI: 10.1039/d1qm00643f Irina Butnaru 1 , Adriana-Petronela Chiriac 1 , Codrin Tugui 1 , Mihai Asandulesa 1 , Mariana-Dana Damaceanu 1
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2021-08-18 , DOI: 10.1039/d1qm00643f Irina Butnaru 1 , Adriana-Petronela Chiriac 1 , Codrin Tugui 1 , Mihai Asandulesa 1 , Mariana-Dana Damaceanu 1
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In the attempt to develop polymeric materials with integrated functionalities for ever-expanding electronic applications, a facile and effective synthetic pathway towards high-k polyimide dielectrics which combine excellent thermostability, stretchability and surface adhesivity is reported. The synergistic effect of highly polar nitrile and jeffamine segments enabled the generation of amorphous semi-interpenetrating polymer networks (SIPNs) whose physico-chemical behavior was triggered by the grafting position of the nitrile unit on the aromatic hard segment. This was evident in various characteristics like solubility, morphology, thermal stability, mechanical strength and moreover, dielectric constant, conductivity, breakdown strength and energy density storage. The SIPN films were tough and highly stretchable, with a maximum strain at break of 516%, meanwhile self-sticky when they come in contact with each other or with other materials. The judicious structural variation in the nitrile-containing segment allowed modulation of the dielectric constant that reached 19 at 106 Hz, which is among the highest reported to date for a neat polyimide material. The resulting SIPNs displayed noticeable breakdown strength, up to 220 V μm−1, and energy storage density up to 1.092 J cm−3. A new insight into the molecular dynamics and charge carrier conductivity of these all-organic high-k polymer dielectrics is also provided to set the premises for use in stretchable electronics.
中文翻译：
腈和杰夫明结构元素对可拉伸和高 k 纯聚酰亚胺材料的协同作用
为了开发具有集成功能的聚合物材料以用于不断扩展的电子应用，这是一条通往高k的简便有效的合成途径据报道，聚酰亚胺电介质结合了优异的热稳定性、拉伸性和表面粘附性。高极性腈和杰夫明链段的协同作用能够生成无定形半互穿聚合物网络 (SIPN)，其理化行为由腈单元在芳族硬链段上的接枝位置触发。这在溶解度、形态、热稳定性、机械强度以及介电常数、电导率、击穿强度和能量密度存储等各种特性中都很明显。SIPN 薄膜坚韧且高度可拉伸，最大断裂应变为 516%，同时当它们相互接触或与其他材料接触时具有自粘性。6 Hz，这是迄今为止报告的纯聚酰亚胺材料的最高频率之一。所得的 SIPN 显示出显着的击穿强度，高达 220 V μm -1，以及高达 1.092 J cm -3 的能量存储密度。还提供了对这些全有机高k聚合物电介质的分子动力学和电荷载流子电导率的新见解，为可拉伸电子产品的使用奠定了基础。
更新日期：2021-09-09
中文翻译：
腈和杰夫明结构元素对可拉伸和高 k 纯聚酰亚胺材料的协同作用
为了开发具有集成功能的聚合物材料以用于不断扩展的电子应用，这是一条通往高k的简便有效的合成途径据报道，聚酰亚胺电介质结合了优异的热稳定性、拉伸性和表面粘附性。高极性腈和杰夫明链段的协同作用能够生成无定形半互穿聚合物网络 (SIPN)，其理化行为由腈单元在芳族硬链段上的接枝位置触发。这在溶解度、形态、热稳定性、机械强度以及介电常数、电导率、击穿强度和能量密度存储等各种特性中都很明显。SIPN 薄膜坚韧且高度可拉伸，最大断裂应变为 516%，同时当它们相互接触或与其他材料接触时具有自粘性。6 Hz，这是迄今为止报告的纯聚酰亚胺材料的最高频率之一。所得的 SIPN 显示出显着的击穿强度，高达 220 V μm -1，以及高达 1.092 J cm -3 的能量存储密度。还提供了对这些全有机高k聚合物电介质的分子动力学和电荷载流子电导率的新见解，为可拉伸电子产品的使用奠定了基础。
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