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.

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 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.

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 Fabrication of Self-Healable Magnetic Nanocomposites via Diels−Alder Click Chemistry

2019 ◽  
Vol 9 (3) ◽  
pp. 506 ◽  
Author(s):  
Yi-Huan Lee ◽  
Yan-Nian Zhuang ◽  
Hsin-Ta Wang ◽  
Ming-Feng Wei ◽  
Wen-Chi Ko ◽  
...  
Keyword(s):  
Hybrid System ◽  
Glycidyl Ether ◽  
Magnetic Behavior ◽  
Diels Alder ◽  
Hybrid Network ◽  
Organic Polymer ◽  
Self Healing ◽  
Multiwalled Carbon ◽  
Novel Approach ◽  
Superparamagnetic Properties

In this study, we report a novel approach to fabricate an organic/inorganic magnetic hybrid system capable of self-healing, wherein a polycaprolactone-poly(furfuryl glycidyl ether) copolymer (PCLF) serving as the structure template was first synthesized, followed by the incorporation of iron oxide nanoparticles-decorated multiwalled carbon nanotubes (IONPs-MWCNTs) and 1,1′-(methylenedi-4,1-phenylene)bismaleimide (BMI) into the polymer matrix to form a covalently crosslinked hybrid network via a Diels−Alder (DA) reaction. For this system, the reactive combination of diene and dienophile from furan/maleimide, MWCNT/furan, and MWCNT/maleimide could facilely induce multiple DA reactions that imparted a versatile route to efficiently introduce IONPs-MWCNTs into the organic polymer hosts, resulting in a uniform distribution of IONPs-MWCNTs that led to a hybrid system with superparamagnetic properties. Beside the magnetic behavior, such material synergistically exhibited a superior ability for healing scratch defects via a retro-DA reaction. Therefore, this crosslinked PCLF/BMI/IONPs-MWCNTs hybrid system which exhibits multifunctional properties including superparamagnetic behavior and self-repairability can serve as an intelligent material for developing advanced electromagnetic applications.

X-band frequency response and electromagnetic interference shielding in multiferroic BiFeO3 nanomaterials

2016 ◽  
Vol 109 (14) ◽  
pp. 142904 ◽  
Author(s):  
Hilal Ahmad Reshi ◽  
Avanish Pratap Singh ◽  
Shreeja Pillai ◽  
Touseef Ahmad Para ◽  
S. K. Dhawan ◽  
...  
Keyword(s):  
Frequency Response ◽  
Electromagnetic Interference ◽  
Electromagnetic Interference Shielding ◽  
Band Frequency ◽  
X Band ◽  
Multiferroic Bifeo3

An Autonomously Ultrafast Self-Healing, Highly Colorless, Tear-Resistant and Compliant Elastomer Tailored for Transparent Electromagnetic Interference Shielding Films Integrated in Flexible and Optical Electronics

2021 ◽  
Author(s):  
FuYao Sun ◽  
JianHua Xu ◽  
Tong Liu ◽  
FeiFei Li ◽  
Yin Poo ◽  
...  
Keyword(s):  
Real World ◽  
Electromagnetic Interference ◽  
Self Healing ◽  
Emi Shielding ◽  
Electromagnetic Interference Shielding ◽  
High Transparency ◽  
Tear Resistance

Considering the operation reliability of flexible and optical electronics (FOEs) in dynamic and real-world environments, autonomous self-healing electromagnetic interference (EMI) shielding materials with high transparency, good stretchability and excellent tear-resistance...

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