基于硼酸盐键的“刚柔”动态聚合物

IF 9.5 2区 材料科学 Q1 CHEMISTRY, PHYSICAL
Jing Tu, Bo Chen, Xinhong Xiong, Weiming Xu and Jiaxi Cui
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引用次数: 0

摘要

应变相关材料,如非牛顿流体和“固-液”动态聚合物,在正常状态下是柔软的,只有在更高的应变率下才表现出明显的刚度。没有材料能在正常条件下保持坚硬,在慢负荷下表现出柔性。在这里,这种材料的独特力学性能是通过由密集的动态硼酸键和刚性苯/锌环结构构成的聚合物网络实现的。聚合物在正常条件下为“刚性固体”状态,在极慢应变频率下为“柔性固体”状态。这种独特的力学性能源于刚性网络中硼酸盐键的缓慢松弛行为。“刚柔”聚合物的抗拉强度可达3.9 MPa,杨氏模量可达85 MPa左右,远远超过了现有的应变相关材料。此外,该聚合物还表现出一些特殊的特性(包括自修复、室温焊接、形状编辑)。这种特殊的动态材料被认为在自适应装备领域有很大的应用前景。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Rigid-flexible dynamic polymers based on borate bonds†

Rigid-flexible dynamic polymers based on borate bonds†

Strain-dependent materials, such as non-Newtonian fluids and solid–liquid dynamic polymers, are soft in the normal state and exhibit significant stiffness only at high strain rates. No material has been reported to date to maintain hardness under normal conditions (>0.17% s−1) and exhibit flexibility under slow load. Herein, this unique mechanical property is realized in polymer networks constructed by dense dynamic borate bonds and rigid benzene/azine ring structures. The polymer exists in a “rigid solid” state under normal conditions and in a “flexible solid” state under extremely slow strain. This unique mechanical property is derived from the slow relaxation behavior of the borate bonds in the rigid networks. The tensile strength of the rigid-flexible polymers could reach up to 3.9 MPa and Young's modulus was about 85 MPa, which far exceeds those of previously reported strain-dependent materials. In addition, the polymer exhibits some special features (including self-healing, room-temperature welding, and shape editing). The special dynamic material is considered to have great application prospects in the field of adaptive equipment.

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来源期刊
Journal of Materials Chemistry A
Journal of Materials Chemistry A CHEMISTRY, PHYSICAL-ENERGY & FUELS
CiteScore
19.50
自引率
5.00%
发文量
1892
审稿时长
1.5 months
期刊介绍: The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.
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