In this work, a stretchable resistive memory device was demonstrated using a functional polyimide with intrinsic stretchability. A series of poly(siloxane-imide)s based on different dianhydrides (ODPA, BPDA, and PMDA) and diamines with different siloxane lengths (DMS-A12 (molecular weight = 900–1000) and DMS-A15 (molecular weight = 3000)) were synthesized for a systematic study. By incorporating the flexible siloxane chain into the polyimide's backbone, the overall solubility and stretchability of the derived polymers can be improved. The memory behavior of these poly(siloxane-imide)s was first examined in the conventional structure, and a stable WORM-type memory property was observed. It could have resulted from the formation of a conductive filament induced by charge transfer and accumulation. Among all the studied polymers, ODPA-A12 showed a Young's modulus (1.596 MPa) compatible with the crosslinked polydimethylsiloxane (PDMS) elastomer, revealing promising potential for stretchable device fabrication. Based on this advantage, a stretchable resistive memory device was realized using ODPA-A12 as the active layer with the employment of the cross-linked PDMS elastomer as the substrate and a carbon nanotube (CNT) as the electrode (PDMS/CNTs/PI/Al). The device not only showed stable WORM-type memory characteristics with a high On/Off ratio (>10⁶) under up to 40% strain, but also possessed high mechanical endurance under 20% strain for 600 stretching cycles. Our results highlight the merits of siloxane-containing polymers for applications in stretchable electronic devices.

中文翻译：

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可拉伸电阻式存储器的本征可拉伸，可溶液加工的功能聚（硅氧烷-酰亚胺）†

在这项工作中，使用具有固有可拉伸性的功能性聚酰亚胺展示了可拉伸的电阻式存储器件。一系列基于不同二酐（ODPA，BPDA和PMDA）和具有不同硅氧烷长度的二胺（DMS-A12（分子量= 900–1000）和DMS-A15（分子量= 3000）的聚（硅氧烷-酰亚胺）系列）进行了系统研究。通过将挠性硅氧烷链结合到聚酰亚胺的主链中，可以改善衍生聚合物的整体溶解性和可拉伸性。首先在常规结构中检查了这些聚（硅氧烷-酰亚胺）的记忆行为，并观察到了稳定的WORM型记忆性能。这可能是由于电荷转移和积累引起的导电丝形成的结果。在所有研究的聚合物中，ODPA-A12显示出与交联的聚二甲基硅氧烷（PDMS）弹性体相容的杨氏模量（1.596 MPa），显示出可拉伸器件制造的潜力。基于此优势，采用ODPA-A12作为活性层，并采用交联的PDMS弹性体作为基材，碳纳米管（CNT）作为电极（PDMS / CNTs / PI / Al）。该器件不仅显示出稳定的WORM型存储特性，而且具有高的开/关比（> 10 使用ODPA-A12作为活性层，并采用交联的PDMS弹性体作为基材，碳纳米管（CNT）作为电极（PDMS / CNTs / PI / Al），实现了可拉伸的电阻式存储器件。该器件不仅显示出稳定的WORM型存储特性，而且具有高的开/关比（> 10 使用ODPA-A12作为活性层，并采用交联的PDMS弹性体作为基材，碳纳米管（CNT）作为电极（PDMS / CNTs / PI / Al），实现了可拉伸的电阻式存储器件。该器件不仅显示出稳定的WORM型存储特性，而且具有高的开/关比（> 10⁶）在高达40％的应变下，但在20％的应变下具有600次拉伸循环的高机械耐力。我们的结果突出了含硅氧烷聚合物在可拉伸电子设备中的优点。