Design and synthesis of mechanochromic poly(ether-ester-urethane) elastomer with high toughness and resilience mediated by crystalline domains

Wang, Wenwen; Li, Manli; Zhou, Pengcheng; Yan, Zhong; Wang, Dong

doi:10.1039/d2py00085g

Cited by 10 publications

(6 citation statements)

References 41 publications

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“…[ 45 , 49 , 50 ] These newly developed functional polyolefins are among the best materials with a great balance between high stress and high toughness (Figure 2I and Figure S21 , Supporting Information). [ 51 , 52 , 53 , 54 , 55 , 56 , 57 ]…”

Section: Resultsmentioning

confidence: 99%

Light, Heat, and Force‐Responsive Polyolefins

Qu,

Bi,

Zou

et al. 2024

Advanced Science

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Stimuli‐responsive polymers have found applications as shape‐memory materials, optical switches, and sensors, but the installation of these responsive properties in non‐polar and inert polyolefins is challenging. In this contribution, a series of spiropyran (SP)‐based comonomers are synthesized and copolymerized with ethylene or ethylene/cyclic monomers. In addition to great mechanical and surface properties, these functionalized polyolefins responded to light, heat, and force, which induced changes in the polymer structure to transmit color or mechanical signals. These interesting responsive properties are also installed in a series of commercial polyolefin materials through reactive extrusion, making the scalable production of these materials possible.

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Section: Resultsmentioning

confidence: 99%

Light, Heat, and Force‐Responsive Polyolefins

Qu,

Bi,

Zou

et al. 2024

Advanced Science

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“…In addition, color variations are quantified by RGB color intensity analysis. RGB is the color representing the three channels of red ( R ), green ( G ) and blue ( B ), and all colors are obtained by the variations of the three RGB color channels and their superposition on each other [ 53 , 54 ]. We observe that the R and B values of elastomer luminescence did not change much with increasing stretching rate, while the G value changes sharply (Fig.…”

Section: Resultsmentioning

confidence: 99%

Mechanoluminescent-Triboelectric Bimodal Sensors for Self-Powered Sensing and Intelligent Control

et al. 2023

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Self-powered flexible devices with skin-like multiple sensing ability have attracted great attentions due to their broad applications in the Internet of Things (IoT). Various methods have been proposed to enhance mechano-optic or electric performance of the flexible devices; however, it remains challenging to realize the display and accurate recognition of motion trajectories for intelligent control. Here, we present a fully self-powered mechanoluminescent-triboelectric bimodal sensor based on micro-nanostructured mechanoluminescent elastomer, which can patterned-display the force trajectories. The deformable liquid metals used as stretchable electrode make the stress transfer stable through overall device to achieve outstanding mechanoluminescence (with a gray value of 107 under a stimulus force as low as 0.3 N and more than 2000 cycles reproducibility). Moreover, a microstructured surface is constructed which endows the resulted composite with significantly improved triboelectric performances (voltage increases from 8 to 24 V). Based on the excellent bimodal sensing performances and durability of the obtained composite, a highly reliable intelligent control system by machine learning has been developed for controlling trolley, providing an approach for advanced visual interaction devices and smart wearable electronics in the future IoT era.

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“…In order to further analyze the changes, the variation trends of tensile strength, Young's modulus and elongation at break of these polymer films at 77 K are plotted in Figure 4c-e, respectively, and the related data are shown in Table 2. Furthermore, the area under the stress-strain curves shown in Figure 4f is usually used to represent the fracture toughness of tensile materials [36][37][38]. It could be seen from Figure 4c that, compared to the untreated case, the cryogenic tensile strength of PET and PI obviously decreased after immersion for 7 days, but the decrease trend remained unchanged with the increase in immersion time.…”

Section: The Liquid Oxygen Compatibility Of These Polymersmentioning

confidence: 99%

Cryogenic Mechanical Properties and Stability of Polymer Films for Liquid Oxygen Hoses

Cui

Chen

et al. 2023

Polymers

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To select the appropriate polymer thin films for liquid oxygen composite hoses, the liquid oxygen compatibility and the cryogenic mechanical properties of four fluoropolymer films (PCTFE, ETFE, FEP and PFA) and two non-fluoropolymer films (PET and PI) before and after immersion in liquid oxygen for an extended time were investigated. The results indicated that the four fluoropolymers were compatible with liquid oxygen before and after immersion for 60 days, and the two non-fluoropolymers were not compatible with liquid oxygen. In addition, the cryogenic mechanical properties of these polymer films underwent changes with the immersion time, and the changes in the non-fluoropolymer films were more pronounced. The cryogenic mechanical properties of the two non-fluoropolymer films were always superior to those of the four fluoropolymer films during the immersion. Further analysis indicated that the fundamental reason for these changes in the cryogenic mechanical properties was the variation in the crystalline phase structure caused by the ultra-low temperature, which was not related to the strong oxidizing properties of the liquid oxygen. Analytical results can provide useful guidance on how to select the appropriate material combination to obtain a reasonable liquid oxygen composite hose structure.

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Design and synthesis of mechanochromic poly(ether-ester-urethane) elastomer with high toughness and resilience mediated by crystalline domains

Abstract: Mechanochromic elastomers play an important role in stain sensing, materials damage alarming and stress detecting, etc. Low activation strain and stress, high toughness and resilience, and self-recovery ability are essential...

Cited by 10 publications

References 41 publications

Light, Heat, and Force‐Responsive Polyolefins

Light, Heat, and Force‐Responsive Polyolefins

Mechanoluminescent-Triboelectric Bimodal Sensors for Self-Powered Sensing and Intelligent Control

Cryogenic Mechanical Properties and Stability of Polymer Films for Liquid Oxygen Hoses

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