Highly self-healable and recyclable graphene nanocomposites composed of a Diels–Alder crosslinking/P3HT nanofibrils dual-network for electromagnetic interference shielding

2021 ◽  
Author(s):  
Yi-Huan Lee ◽  
Chao-Lin Cheng ◽  
Chin-Hsien Chiang ◽  
Zheng-Hao Tong ◽  
Lyu-Ying Wang ◽  
...  
Keyword(s):  
Electromagnetic Interference ◽  
Conjugated Polymer ◽  
Diels Alder ◽  
Self Healing ◽  
Electromagnetic Interference Shielding ◽  
Graphene Nanocomposites ◽  
Self Assembled

In this study, a novel self-healing material with a dual-network composed of cross-linked structure by Diels–Alder (DA) chemistry interconnected with self-assembled π-conjugated polymer nanofibrils was developed for application in electromagnetic...

scholarly journals Development of Self-Healable Organic/Inorganic Hybrid Materials Containing a Biobased Copolymer via Diels–Alder Chemistry and Their Application in Electromagnetic Interference Shielding

Polymers ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 1755
Author(s):  
Yi-Huan Lee ◽  
Wen-Chi Ko ◽  
Yan-Nian Zhuang ◽  
Lu-Ying Wang ◽  
Tao-Wei Yu ◽  
...  
Keyword(s):  
Hybrid Materials ◽  
Hybrid System ◽  
Electromagnetic Interference ◽  
Diels Alder ◽  
Structural Defects ◽  
Material System ◽  
Self Healing ◽  
Electromagnetic Interference Shielding ◽  
Band Frequency ◽  
Inorganic Hybrid

In this study, a novel biobased poly(ethylene brassylate)-poly(furfuryl glycidyl ether) copolymer (PEBF) copolymer was synthesized and applied as a structure-directing template to incorporate graphene and 1,1′-(methylenedi-4,1-phenylene)bismaleimide (BMI) to fabricate a series of self-healing organic/inorganic hybrid materials. This ternary material system provided different types of diene/dienophile pairs from the furan/maleimide, graphene/furan, and graphene/maleimide combinations to build a crosslinked network via multiple Diels–Alder (DA) reactions and synergistically co-assembled graphene sheets into the polymeric matrix with a uniform dispersibility. The PEBF/graphene/BMI hybrid system possessed an efficient self-repairability for healing structural defects and an electromagnetic interference shielding ability in the Ku-band frequency range. We believe that the development of the biobased self-healing hybrid system provides a promising direction for the creation of a new class of materials with the advantages of environmental friendliness as well as durability, and shows potential for use in advanced electromagnetic applications.

scholarly journals A Healable and Mechanically Enhanced Composite with Segregated Conductive Network Structure for High-Efficient Electromagnetic Interference Shielding

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Ting Wang ◽  
Wei-Wei Kong ◽  
Wan-Cheng Yu ◽  
Jie-Feng Gao ◽  
Kun Dai ◽  
...  
Keyword(s):  
Electromagnetic Interference ◽  
Diels Alder ◽  
Electrostatic Attraction ◽  
List Type ◽  
Shielding Effectiveness ◽  
Emi Shielding ◽  
Electromagnetic Interference Shielding ◽  
Elongation At Break ◽  
High Efficient ◽  
Emi Se

Highlights The cationic waterborne polyurethanes microspheres with Diels-Alder bonds were synthesized for the first time. The electrostatic attraction not only endows the composite with segregated structure to gain high electromagnetic-interference shielding effectiveness, but also greatly enhances mechanical properties. Efficient healing property was realized under heating environment. Abstract It is still challenging for conductive polymer composite-based electromagnetic interference (EMI) shielding materials to achieve long-term stability while maintaining high EMI shielding effectiveness (EMI SE), especially undergoing external mechanical stimuli, such as scratches or large deformations. Herein, an electrostatic assembly strategy is adopted to design a healable and segregated carbon nanotube (CNT)/graphene oxide (GO)/polyurethane (PU) composite with excellent and reliable EMI SE, even bearing complex mechanical condition. The negatively charged CNT/GO hybrid is facilely adsorbed on the surface of positively charged PU microsphere to motivate formation of segregated conductive networks in CNT/GO/PU composite, establishing a high EMI SE of 52.7 dB at only 10 wt% CNT/GO loading. The Diels–Alder bonds in PU microsphere endow the CNT/GO/PU composite suffering three cutting/healing cycles with EMI SE retention up to 90%. Additionally, the electrostatic attraction between CNT/GO hybrid and PU microsphere helps to strong interfacial bonding in the composite, resulting in high tensile strength of 43.1 MPa and elongation at break of 626%. The healing efficiency of elongation at break achieves 95% when the composite endured three cutting/healing cycles. This work demonstrates a novel strategy for developing segregated EMI shielding composite with healable features and excellent mechanical performance and shows great potential in the durable and high precision electrical instruments.

Technical viewpoint on polystyrene/graphene nanocomposite

2020 ◽  
pp. 089270572090765
Author(s):  
Ayesha Kausar
Keyword(s):  
Electromagnetic Interference ◽  
High Performance ◽  
State Of The Art ◽  
Synthetic Methods ◽  
Structure Property ◽  
Electromagnetic Interference Shielding ◽  
Graphene Nanocomposites ◽  
Structure Property Relationship ◽  
Fundamental Understanding ◽  
Graphene Nanocomposite

This review presents state-of-the-art progress in the field of polystyrene (PS)/graphene nanocomposite. Graphene is a monoatomic thick nanoallotrope of carbon. It has attracted tremendous research consideration owing to chemical functionalization aptitude and remarkable physical properties. Graphene has been used as a potential nanofiller to dramatically improve the performance of polymeric nanocomposite. PS is an important synthetic aromatic thermoplastic polymer. Graphene has been used to enhance the mechanical strength, thermal stability, electrical conductivity, and thermal conductivity of PS/graphene nanocomposite. Dispersion routes and synthetic methods of graphene and PS/graphene nanocomposite have also been reviewed. PS/graphene nanocomposites have been explored for anticorrosion, electromagnetic interference shielding, batteries, electrocatalysis, and microextraction applications. In spite of interesting developments, a lot remains to be done with regard to fundamental understanding of structure–property relationship and designing materials to operate for advanced high performance applications. This review is also concluded listing current challenges associated with processing and future perspectives of nanocomposite.

Self-healing graphene oxide-based composite for electromagnetic interference shielding

Carbon ◽  
2019 ◽  
Vol 155 ◽  
pp. 499-505 ◽  
Author(s):  
Hyeon Jun Sim ◽  
Duck Weon Lee ◽  
Hyunsoo Kim ◽  
Yongwoo Jang ◽  
Geoffrey M. Spinks ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Electromagnetic Interference ◽  
Self Healing ◽  
Electromagnetic Interference Shielding

scholarly journals Rapid self-healing and recycling of multiple-responsive mechanically enhanced epoxy resin/graphene nanocomposites

RSC Advances ◽  
2017 ◽  
Vol 7 (73) ◽  
pp. 46336-46343 ◽  
Author(s):  
Chenting Cai ◽  
Yue Zhang ◽  
Xueting Zou ◽  
Rongchun Zhang ◽  
Xiaoliang Wang ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
High Performance ◽  
Diels Alder ◽  
Self Healing ◽  
Covalent Bonds ◽  
Graphene Nanocomposites ◽  
Graphene Nanocomposite

A rapid self-healing and recyclable high-performance crosslinked epoxy resin (ER)/graphene nanocomposite is reported by simultaneously incorporating thermally reversible Diels–Alder (DA) covalent bonds and multiple-responsive graphene into the ER matrix.

scholarly journals Multiple-responsive shape memory polyacrylonitrile/graphene nanocomposites with rapid self-healing and recycling properties

RSC Advances ◽  
2018 ◽  
Vol 8 (3) ◽  
pp. 1225-1231 ◽  
Author(s):  
Chenting Cai ◽  
Yue Zhang ◽  
Mei Li ◽  
Yan Chen ◽  
Rongchun Zhang ◽  
...  
Keyword(s):  
Mechanical Property ◽  
Shape Memory ◽  
Covalent Bond ◽  
Diels Alder ◽  
Self Healing ◽  
Graphene Nanocomposites ◽  
Graphene Nanocomposite

A Diels–Alder covalent bond based crosslinked polyacrylonitrile/graphene nanocomposite is reported, which has the multiple-responsive properties of shape memory, self-healing, and reprocessing in addition to enhanced mechanical property.

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