Healable, highly thermal conductive, flexible polymer composite with excellent mechanical properties and multiple functionalities

Wang, Dong; Ren, Shangyang; Chen, Jiaoyang; Li, Yukun; Wang, Zhifeng; Xu, Jianhua; Jia, Xu; Fu, Jiajun

doi:10.1016/j.cej.2021.133163

Cited by 43 publications

(29 citation statements)

References 47 publications

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“…2c). The Raman spectrum reflected the existence of disulfide bonds in the polyurethanes, proving that the disulfide bonds have been successfully implanted in the molecular network structure 47 (Fig. 2d).…”

Section: Resultsmentioning

confidence: 78%

See 1 more Smart Citation

Rapid self-healing and tough polyurethane based on the synergy of multi-level hydrogen and disulfide bonds for healing propellant microcracks

Xiang

et al. 2022

Mater. Chem. Front.

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Section: Resultsmentioning

confidence: 78%

“…When the strain was greater than 200%, the internal frictional resistance was overcome, the molecular chain segments underwent relative displacement, and the area of the hysteresis loop was large. 47,56 Fig. 4b and Fig.…”

Section: Thermal and Mechanical Propertiesmentioning

confidence: 98%

Rapid self-healing and tough polyurethane based on the synergy of multi-level hydrogen and disulfide bonds for healing propellant microcracks

Xiang

et al. 2022

Mater. Chem. Front.

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“…30 The material without thiourea (B1) turns out no self-healing process as we previous studied. 30 When the ratio of HMDI to TCDI is 6:1 (B2), it exhibits a negligible selfhealing process; the healing efficiency is only 5.6% after 24 h. The poor self-healing properties can be ascribed to the inert dynamic process of H-bonds at room temperature, which can be activated by heating 1,28 or assistance of trance organic solvent. 20 Further increase of thiourea content to 3:1 (B3) demonstrated an enhanced healing efficiency to 56.2% after 24 h. When the thiourea content increased to 1:1, the material shows a fast self-healing process; the healing efficiency reaches 100% after 10 min.…”

Section: Resultsmentioning

confidence: 99%

“…Nevertheless, these materials are usually accompanied by poor mechanical robustness because of inducing reversible dynamic crosslinking points, which restricted their further development. To obtain self-healing materials with better integrated properties, researchers came up with the design method by combining two or more types of reversible bonds in one self-healing system to enable a hierarchical energy dissipation mechanism. , For example, Lee et al prepared a self-healing PU via dual-dynamic covalent bonds containing imine and disulfide bonds. Compared with materials containing only one type of dynamic covalent bond such as imine and disulfide group, PU crosslinked with dual-dynamic covalent bonds exhibited excellent self-healing property due to the synergy of the dual-dynamic metatheses of the imine and disulfide bonds .…”

Section: Introductionmentioning

confidence: 99%

Design of Robust Self-Healing Silicone Elastomers Based on Multiple H-Bonding and Dynamic Covalent Bond

2022

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A room-temperature self-healing silicone elastomer was prepared based on the synergistic effect of multiple H-bonding and dynamic covalent bond. The multiple bonds constructed by inserting thiourea into the polyurea network can inhibit the crystallization of hard urea H-bonds segments and activate the diffusion movement of polymer chains. Dynamic imine endows materials with a strong connection for the fracture interface by imine metathesis. The effect of thiourea on urea H-bonds was confirmed by the Fourier transform infrared spectrum, which showed obvious changes of H-bond density according to peak revolution of CO and N–H. Differential scanning calorimetry demonstrated the transition from the crystalline to amorphous state after the introduction of thiourea. Tensile tests and scratch-healing tests showed that this design method can improve the self-healing property without sacrificing the mechanical strength. Finally, the optimized self-healing process was analyzed from the perspectives of the contact process, the interpenetration diffusion of the polymer chain, and rebuilding of crosslinking points between the two interfaces, which would build an avenue for constructing a fast, self-healing, and tough material.

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“…Currently, introducing BNNSs into polymers and simultaneously constructing its thermally conductive network in nanocomposites is an effective way. [15,17,96,[153][154][155][156][157][158] Table 2 shows the highest values reported in previous literature at the time of writing for the thermal conductivity of polymer/BNNS nanocomposites and the corresponding nanocomposite fabrication technique adopted.…”

Section: Thermal Managementmentioning

confidence: 97%

2D Boron Nitride Nanosheets for Smart Thermal Management and Advanced Dielectrics

Zhou

Zhang

et al. 2022

Adv Materials Inter

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With the rapid development of electronic devices toward the miniaturization, integration, and multi‐functionalization, the device stability, reliability, and service life face significant challenges due to the greatly increased heat accumulation. Therefore, it is highly desired to develop efficient thermal dissipation materials in thermal management. Thermally conductive polymer composites are expected to be widely applied in 5G communication, electronic packaging, and energy storage, owing to the ease of processing, good flexibility, low cost, etc. Boron nitride nanosheet (BNNS) is generally used as highly thermal conductive nanofillers for greatly improving the thermal conductivity of polymer. Mass production of high quality BNNS with desired properties and the structural design principles and fabrication methods for polymer/BNNS nanocomposites are critical to achieve extensive applications. Here, this review summarizes the latest advancement of the preparation method of BNNS and its polymer nanocomposites, as well as the innovatively structural design for observably improving the thermal management capability and energy storage performance of polymer/BNNS nanocomposites, expecting to offer some guidance on how to massively fabricate the BNNS and highly thermally conductive polymer composites.

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Healable, highly thermal conductive, flexible polymer composite with excellent mechanical properties and multiple functionalities

Cited by 43 publications

References 47 publications

Rapid self-healing and tough polyurethane based on the synergy of multi-level hydrogen and disulfide bonds for healing propellant microcracks

Rapid self-healing and tough polyurethane based on the synergy of multi-level hydrogen and disulfide bonds for healing propellant microcracks

Design of Robust Self-Healing Silicone Elastomers Based on Multiple H-Bonding and Dynamic Covalent Bond

2D Boron Nitride Nanosheets for Smart Thermal Management and Advanced Dielectrics

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