Fabrication of Cellulose Nanofiber/Reduced Graphene Oxide/Nitrile Rubber Flexible Films Using Pickering Emulsion Technology for Electromagnetic Interference Shielding and Piezoresistive Sensor

Wang, Yanan; Guan, Yupeng; Liao, Daogui; He, Yingying; Li, Shuai; Zhou, Li; Yu, Chuanbai; Chen, Yunhua; Liu, Yuanli; Liu, Hongxia

doi:10.1002/mame.202100070

Cited by 25 publications

(12 citation statements)

References 54 publications

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“…When electromagnetic waves enter the interior of the composite material, various reflections and scattering will occur between the PPA6@NiM and the Ni layers on the surface of the PA6 skeleton. Such a particular structure simultaneously improves the composite material’s shielding efficiency and absorption effect on electromagnetic waves. − …”

Section: Results and Discussionmentioning

confidence: 99%

Efficient Electromagnetic Interference Shielding of PPA6@NiM/PDMS Composites with Porous and Asymmetric Gradient Structures

Zhu

et al. 2023

ACS Appl. Polym. Mater.

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In this work, magnetic PA6 microspheres (PPA6@ NiM) with porous structures were prepared using the solvent coprecipitation method and electroless nickel plating technology, and the stacked magnetic microspheres were encapsulated with polydimethylsiloxane (PDMS) to obtain PPA6@NiM/PDMS composites. The existence of the porous structure increases the attenuation path of the electromagnetic wave, and the presence of the nickel layer improves the magnetic loss of the composite material to the electromagnetic wave and synergistically improves the absorption of the electromagnetic wave. Among them, the total shielding effectiveness (SET) of the PPA6@NiM4/PDMS composite is as high as 39.9 dB, and the reflection coefficient (R) is 0.83. To further increase the absorption effect of the composite material, an asymmetric gradient structure was constructed by utilizing the difference in electrical conductivity between the magnetic microspheres. The electromagnetic wave is incident from the surface with lower conductivity (impedance matching layer). It is reflected by the consistency with higher conductivity (strong reflective layer) than the bottom layer to increase the loss of electromagnetic waves inside the material. The composite SET constructed with M1 and M4 particles with the most significant difference in conductivity achieved 35.5 dB with an absorption coefficient (A) of 0.42. It shows that the porous combined asymmetric gradient structure we designed can effectively improve the shielding efficiency and absorption capacity of the composite material against electromagnetic microwaves and serve as a reference for creating high-absorbing and high-performance electromagnetic shielding materials.

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Section: Results and Discussionmentioning

confidence: 99%

Efficient Electromagnetic Interference Shielding of PPA6@NiM/PDMS Composites with Porous and Asymmetric Gradient Structures

Zhu

et al. 2023

ACS Appl. Polym. Mater.

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“…Moreover, the EMI SE increases with the content of GNS in the CNF/GNS layer increasing, and the film with 45 wt% GNS achieved the highest SE of 34.9 dB. To increase the flexibility and strength of the composite material, Wang et al prepared a CNF/RGO/nitrile rubber (NBR) composite film by Pickering emulsion and hot-pressing technology (Figure 5d) [107] The CNF acts as a stabilizer for Pickering emulsion and forms a polymer matrix. The composite film with an EMI SE value of 25.81 dB is composed of a 3D network conductive skeleton structure of RGO and an isolated NBR structure.…”

Section: Cellulose Composite Films For Emi Shieldingmentioning

confidence: 99%

Section: Cellulose Composite Films For Emi Shieldingmentioning

confidence: 99%

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Recent Progress in the Application of Cellulose in Electromagnetic Interference Shielding Materials

Zhao

Zhang

et al. 2022

Macro Materials & Eng

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Excessive electromagnetic radiation produced by widely used electronic equipment not only harms human health but also affects the accuracy of precision instruments. To meet the growing demand for electromagnetic interference (EMI) shielding materials, various novel materials are investigated. As a natural biopolymer, cellulose possesses the merits of biodegradability, thermal stability, easy processability, and low cost. Owing to tremendous advantages, cellulose can be used as a substrate, binder, and derived carbon material for EMI shielding materials. Although many research papers on EMI shielding materials containing cellulose have been published, a detailed summary on them has not been acknowledged yet. Hence, this review is composed mainly to cover the structure and properties of cellulose, as well as electromagnetic shielding theory, which are explained in detail by using various research articles, review papers, and book chapters. And the recent applications of cellulose in EMI shielding materials are highlighted. It is hoped that the information gathered from previous studies can provide a reference for the fabrication of cellulose composites with higher EMI shielding performance in future research.

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“…Currently, the materials used in the preparation of flexible sensors mainly include hydrogel, − fiber, − and rubber. − Compared with hydrogels and fibers, rubber materials have the advantages of high elasticity, abrasive resistance, and modulus. Therefore, rubber matrix materials are more suitable for preparing flexible sensors.…”

Section: Introductionmentioning

confidence: 99%

High-Performance Sensors Based on Chinese Ink and Water-Based Glue for Detection of Strain, Temperature, and Humidity

Liu

Zhou

Chen

et al. 2022

ACS Sustainable Chem. Eng.

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Flexible sensors with high sensitivity and reproducibility have critical applications in various industrial fields. However, current sensors have not yet been able to respond to diverse signal changes in the environment due to their poor stability, weak conductivity, high cost, and time-consuming integration process. Herein, we used dip-coating technology to prepare multifunctional rubber flexible sensors which were based on the Chinese ink carbon nanoparticle (ICN) and waterbased glue. The prepared flexible sensors have the ability to sensitively detect temperature, humidity, and strain signals. The conductive ICN can well adhere on the elastic substrate (natural rubber latex glove), which gives the flexible sensors excellent structural stability even after 500 cycles. The strain response and recovery time of the flexible sensors are 132.8 and 133.8 ms, respectively. The flexible sensors can sensitively detect tiny pressure, human body movements, pronunciation, and human facial expression. Moreover, the prepared high-performance flexible sensors can also be used as temperature and humidity sensors, which displayed a good linear relationship between resistance change and the external signals. This work developed a simple, green, high-efficiency, and low-cost flexible sensors, which shows promising potential in wearable electronic devices for detection of strain, humidity, and temperature.

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Fabrication of Cellulose Nanofiber/Reduced Graphene Oxide/Nitrile Rubber Flexible Films Using Pickering Emulsion Technology for Electromagnetic Interference Shielding and Piezoresistive Sensor

Cited by 25 publications

References 54 publications

Efficient Electromagnetic Interference Shielding of PPA6@NiM/PDMS Composites with Porous and Asymmetric Gradient Structures

Efficient Electromagnetic Interference Shielding of PPA6@NiM/PDMS Composites with Porous and Asymmetric Gradient Structures

Recent Progress in the Application of Cellulose in Electromagnetic Interference Shielding Materials

High-Performance Sensors Based on Chinese Ink and Water-Based Glue for Detection of Strain, Temperature, and Humidity

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