自修复高分子材料能够在外界刺激下自主修复损伤,是材料研究的前沿方向。其在保持产品质量和功能并延长产品寿命的能力在减轻塑料废物对环境的负担方面发挥着至关重要的作用。自修复材料的早期研究主要集中在通过集成嵌入式修复剂实现...自修复高分子材料能够在外界刺激下自主修复损伤,是材料研究的前沿方向。其在保持产品质量和功能并延长产品寿命的能力在减轻塑料废物对环境的负担方面发挥着至关重要的作用。自修复材料的早期研究主要集中在通过集成嵌入式修复剂实现的外援型自修复材料,其主要致力于优化修复剂的释放和确保快速的自修复能力。近年来的研究重点逐渐转向了利用材料固有反应性和基质内相互作用的本征型自修复材料。它们能在同一受损区域实现多次自修复,这得益于可逆的化学反应和超分子相互作用。本文全面探讨了外援型和本征型自修复方法,阐明了它们的独特性质和特征。此外,还系统分析了各种自修复机制,并整合了前沿研究的最新见解。Self-healing polymeric materials, designed to autonomously repair damage caused by external factors, are gaining prominence in sustainable materials research. These materials help preserve product quality and functionality, extending the lifespan of products and reducing the environmental impact of plastic waste. Early research in self-healing materials predominantly focused on extrinsic healing systems, which involve the incorporation of healing agents within the material. These studies emphasized optimizing the release of healing agents to enable rapid repair. More recently, attention has shifted to intrinsic self-healing systems that capitalize on the material’s own reactive properties and internal interactions. These systems offer the benefit of repeated self-repair at the same damaged site, thanks to reversible chemical reactions and supramolecular forces. This review provides an in-depth comparison of extrinsic and intrinsic self-healing strategies, highlighting their distinct properties. Additionally, it surveys various self-healing mechanisms and integrates findings from cutting-edge research to offer a comprehensive understanding of the field.展开更多
Organic semiconductor materials have shown unique advantages in the development of optoelectronic devices due to their ease of preparation,low cost,lightweight,and flexibility.In this work,we explored the application ...Organic semiconductor materials have shown unique advantages in the development of optoelectronic devices due to their ease of preparation,low cost,lightweight,and flexibility.In this work,we explored the application of the organic semiconductor Y6-1O single crystal in photodetection devices.Firstly,Y6-1O single crystal material was prepared on a silicon substrate using solution droplet casting method.The optical properties of Y6-1O material were characterized by polarized optical microscopy,fluorescence spectroscopy,etc.,confirming its highly single crystalline performance and emission properties in the near-infrared region.Phototransistors based on Y6-1O materials with different thicknesses were then fabricated and tested.It was found that the devices exhibited good visible to near-infrared photoresponse,with the maximum photoresponse in the near-infrared region at 785 nm.The photocurrent on/off ratio reaches 10^(2),and photoresponsivity reaches 16 mA/W.It was also found that the spectral response of the device could be regulated by gate voltage as well as the material thickness,providing important conditions for optimizing the performance of near-infrared photodetectors.This study not only demonstrates the excellent performance of organic phototransistors based on Y6-1O single crystal material in near-infrared detection but also provides new ideas and directions for the future development of infrared detectors.展开更多
本研究通过三步扩链法将聚醚胺D230引入基于Diels-Alder (DA)键的热可逆聚氨酯,制备了一系列含高密度氢键的自修复聚氨酯材料。当nD230:nDA = 1.0:1.5时,高密度氢键和DA键协同作用使得聚氨酯材料具有优异的综合力学性能,其拉伸强度、断...本研究通过三步扩链法将聚醚胺D230引入基于Diels-Alder (DA)键的热可逆聚氨酯,制备了一系列含高密度氢键的自修复聚氨酯材料。当nD230:nDA = 1.0:1.5时,高密度氢键和DA键协同作用使得聚氨酯材料具有优异的综合力学性能,其拉伸强度、断裂伸长率和韧性分别达到14.34 MPa、623.65%和68.87 MJ/m3。同时,还赋予聚氨酯材料优异的自修复性能。材料在120℃修复40 min后,再在60℃下保温12 h,其修复效率超过了100%,达到了103.16%。而且,材料还具有优异的多次修复能力,即使经过三次重复修复,其修复效率仍然能够达到66.12%。该研究为开发高性能自修复聚氨酯提供了一种简单且经济的途径,在电子器件、软体机器人等领域有一定的发展前景。This study introduces polyetheramine D230 into a thermally reversible polyurethane based on Diels-Alder (DA) bonds, resulting in a series of self-healing polyurethane materials containing high-density hydrogen bonds. When the molar ratio nD230:nDA = 1.0:1.5, the synergistic effect of high-density hydrogen bonds and DA bonds endows the polyurethane with outstanding comprehensive mechanical properties, achieving a tensile strength of 14.33 MPa, an elongation at break of 623.65%, and a toughness of 68.87 MJ/m3. Moreover, the synergistic interaction between hydrogen bonding and thermally reversible DA bonds imparts excellent self-healing performance to the material. After treatment at 120˚C for 40 minutes followed by maintaining at 60˚C for 12 hours, complete self-healing can be achieved. Additionally, the material demonstrates exceptional multi-cycle healing capability, maintaining a healing efficiency of 66.12% even after three damage-healing cycles. This study provides a simple and cost-effective approach for developing high-performance self-healing polyurethane, with promising applications in fields such as electronic devices and soft robotics.展开更多
文摘自修复高分子材料能够在外界刺激下自主修复损伤,是材料研究的前沿方向。其在保持产品质量和功能并延长产品寿命的能力在减轻塑料废物对环境的负担方面发挥着至关重要的作用。自修复材料的早期研究主要集中在通过集成嵌入式修复剂实现的外援型自修复材料,其主要致力于优化修复剂的释放和确保快速的自修复能力。近年来的研究重点逐渐转向了利用材料固有反应性和基质内相互作用的本征型自修复材料。它们能在同一受损区域实现多次自修复,这得益于可逆的化学反应和超分子相互作用。本文全面探讨了外援型和本征型自修复方法,阐明了它们的独特性质和特征。此外,还系统分析了各种自修复机制,并整合了前沿研究的最新见解。Self-healing polymeric materials, designed to autonomously repair damage caused by external factors, are gaining prominence in sustainable materials research. These materials help preserve product quality and functionality, extending the lifespan of products and reducing the environmental impact of plastic waste. Early research in self-healing materials predominantly focused on extrinsic healing systems, which involve the incorporation of healing agents within the material. These studies emphasized optimizing the release of healing agents to enable rapid repair. More recently, attention has shifted to intrinsic self-healing systems that capitalize on the material’s own reactive properties and internal interactions. These systems offer the benefit of repeated self-repair at the same damaged site, thanks to reversible chemical reactions and supramolecular forces. This review provides an in-depth comparison of extrinsic and intrinsic self-healing strategies, highlighting their distinct properties. Additionally, it surveys various self-healing mechanisms and integrates findings from cutting-edge research to offer a comprehensive understanding of the field.
基金Supported by the National Key Research and Development Program of China(2021YFB2012601)National Natural Science Foundation of China(12204109)+1 种基金Science and Technology Innovation Plan of Shanghai Science and Technology Commission(21JC1400200)Higher Education Indus⁃try Support Program of Gansu Province(2022CYZC-06)。
文摘Organic semiconductor materials have shown unique advantages in the development of optoelectronic devices due to their ease of preparation,low cost,lightweight,and flexibility.In this work,we explored the application of the organic semiconductor Y6-1O single crystal in photodetection devices.Firstly,Y6-1O single crystal material was prepared on a silicon substrate using solution droplet casting method.The optical properties of Y6-1O material were characterized by polarized optical microscopy,fluorescence spectroscopy,etc.,confirming its highly single crystalline performance and emission properties in the near-infrared region.Phototransistors based on Y6-1O materials with different thicknesses were then fabricated and tested.It was found that the devices exhibited good visible to near-infrared photoresponse,with the maximum photoresponse in the near-infrared region at 785 nm.The photocurrent on/off ratio reaches 10^(2),and photoresponsivity reaches 16 mA/W.It was also found that the spectral response of the device could be regulated by gate voltage as well as the material thickness,providing important conditions for optimizing the performance of near-infrared photodetectors.This study not only demonstrates the excellent performance of organic phototransistors based on Y6-1O single crystal material in near-infrared detection but also provides new ideas and directions for the future development of infrared detectors.
文摘本研究通过三步扩链法将聚醚胺D230引入基于Diels-Alder (DA)键的热可逆聚氨酯,制备了一系列含高密度氢键的自修复聚氨酯材料。当nD230:nDA = 1.0:1.5时,高密度氢键和DA键协同作用使得聚氨酯材料具有优异的综合力学性能,其拉伸强度、断裂伸长率和韧性分别达到14.34 MPa、623.65%和68.87 MJ/m3。同时,还赋予聚氨酯材料优异的自修复性能。材料在120℃修复40 min后,再在60℃下保温12 h,其修复效率超过了100%,达到了103.16%。而且,材料还具有优异的多次修复能力,即使经过三次重复修复,其修复效率仍然能够达到66.12%。该研究为开发高性能自修复聚氨酯提供了一种简单且经济的途径,在电子器件、软体机器人等领域有一定的发展前景。This study introduces polyetheramine D230 into a thermally reversible polyurethane based on Diels-Alder (DA) bonds, resulting in a series of self-healing polyurethane materials containing high-density hydrogen bonds. When the molar ratio nD230:nDA = 1.0:1.5, the synergistic effect of high-density hydrogen bonds and DA bonds endows the polyurethane with outstanding comprehensive mechanical properties, achieving a tensile strength of 14.33 MPa, an elongation at break of 623.65%, and a toughness of 68.87 MJ/m3. Moreover, the synergistic interaction between hydrogen bonding and thermally reversible DA bonds imparts excellent self-healing performance to the material. After treatment at 120˚C for 40 minutes followed by maintaining at 60˚C for 12 hours, complete self-healing can be achieved. Additionally, the material demonstrates exceptional multi-cycle healing capability, maintaining a healing efficiency of 66.12% even after three damage-healing cycles. This study provides a simple and cost-effective approach for developing high-performance self-healing polyurethane, with promising applications in fields such as electronic devices and soft robotics.
