Regulating lignin content to obtain excellent bamboo-derived electromagnetic wave absorber with thermal stability

Lou, Zhichao; Wang, Qiuyi; Sun, Wei; Liu, Jie; Yan, Han; He, Hongliang; Bian, Huiyang; Li, Yanjun

doi:10.1016/j.cej.2021.133178

Cited by 96 publications

(22 citation statements)

References 66 publications

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“…A eff defined by eq S9 represented the nonreflected power, which was 86.1, 95.5, 96.4, and 97.6% at different moisture contents, respectively. As the moisture content increased, the higher A eff values represented the better absorption performance of an EM shielding material for the penetrating EM energies . Combined with the relatively high SE A value, it could be inferred that the microwave penetrating the material was mainly attenuated by absorption.…”

Section: Resultsmentioning

confidence: 99%

“…As the moisture content increased, the higher A eff values represented the better absorption performance of an EM shielding material for the penetrating EM energies. 63 Combined with the relatively high SE A value, it could be inferred that the microwave penetrating the material was mainly attenuated by absorption. Therefore, the dominating EMI shielding mechanism of the TOCN/Ti 3 C 2 T x @PVA/KOH@ITO/PET flexible device was reflection, originating from the impedance mismatch between the air, hydrogel, and functional films, followed by polarization loss.…”

Section: Photoelectric Responsementioning

confidence: 99%

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Patternable Nanocellulose/Ti₃C₂T_x Flexible Films with Tunable Photoresponsive and Electromagnetic Interference Shielding Performances

Jin

Sang

Yue

et al. 2022

ACS Appl. Mater. Interfaces

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Nanocellulose-mediated MXene composites have attracted widespread attention in the fields of sustainable energy, wearable sensors, and electromagnetic interference (EMI) shielding. However, the effects of different nanocelluloses on the multifunctional properties of nanocellulose/Ti 3 C 2 T x composites still need further exploration. Herein, we use three types of nanocelluloses, including bacterial cellulose (BC), cellulose nanocrystals (CNCs), and 2,2,6,6-tetramethylpiperidin-1-yloxy (TEMPO)-oxidized cellulose nanofibers (TOCNs), as intercalation to link Ti 3 C 2 T x nanosheets via a self-assembly process, improving the dispersibility, film-forming ability, mechanical properties, and multifunctional performances of nanocelluloses/Ti 3 C 2 T x hybrids through electrostatic forces and hydrogen bonding. The optimized ultrathin (∼40 μm) TOCN/Ti 3 C 2 T x film integrates excellent tensile strength (∼98.89 MPa), long-term stability (during deformation and water erosion), favorable photoelectric response (photosensitivity up to 2620%), and temperature response (reaching 163 °C in only 12 s). Laser-cutting patterned TOCN/Ti 3 C 2 T x films are assembled into flexible multifunctional electronics, exhibiting splendid photoresponse performances and tunable electromagnetic energy shielding capability (>96.4%) related to the variation of water content at the film−gel electrolyte interface. Multifunctional patterned devices based on TOCN/Ti 3 C 2 T x composite films provide a novel pathway to rationally design wearable EMI devices with photoelectric response and photothermal conversion.

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Section: Resultsmentioning

confidence: 99%

Section: Photoelectric Responsementioning

confidence: 99%

Patternable Nanocellulose/Ti₃C₂T_x Flexible Films with Tunable Photoresponsive and Electromagnetic Interference Shielding Performances

Jin

Sang

Yue

et al. 2022

ACS Appl. Mater. Interfaces

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“…The FTIR peak at 3415 cm –1 is caused by the stretching vibration of O–H from the adsorbed H 2 O . The FTIR peak at 2889 and 1382 cm –1 is attributed to the stretching and bending vibrations of C–H in cellulose and lignin, respectively. , The FTIR peak at 1603 cm –1 is due to the stretching vibration of CO . The FTIR peak at 1053 cm –1 is assigned to the stretching vibration of C–O .…”

Section: Resultsmentioning

confidence: 99%

Efficient Removal of Pb²⁺ from Water by Bamboo-Derived Thin-Walled Hollow Ellipsoidal Carbon-Based Adsorbent

Zhao

et al. 2022

Langmuir

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Lead ion (Pb2+) is one of the most common water pollutants. Herein, with bamboo as the raw material, we fabricate a thin-walled hollow ellipsoidal carbon-based adsorbent (CPCs900) containing abundant O-containing groups and carbon defects and having a specific surface area as large as 730.87 m2 g–1. CPCs900 shows a capacity of 37.26 mg g–1 for adsorbing Pb2+ in water and an efficiency of 98.13% for removing Pb2+ from water. This is much better than the activated carbon commonly used for removing Pb2+ from water (12.19 mg g–1, 30.48%). The bond interaction of Pb2+ with the O-containing groups on CPCs900 and the electrostatic interaction of Pb2+ with the electron-rich carbon defects on CPCs900 could be the main forces to drive Pb2+ adsorption on CPCs900. The outstanding adsorption performance of CPCs900 could be due to the abundant O-containing groups and carbon defects as well as the large specific surface area of CPCs900. Bamboo has a large reserve and a low price. The present work successfully converts bamboo into adsorbents with outstanding performances in removing Pb2+ from water. This is of great significance for meeting the huge industrial demand on highly efficient adsorbents for removing toxic metal ions from water.

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“…Owing to the synergy of magnetic loss and dielectric loss, as well as the multiple reflections of incident EMWs, Co@PC exhibited an RL min of −58.4 dB at 8.6 GHz. Utilizing bamboo as the raw material, Bian's group [112] prepared a magnetic biochar for high-performance EMW absorption. When wood and bamboo were chosen to prepare carbon-based materials, the content of lignin may affect the loading of modified substances.…”

Section: Biomass-derived 3d Compositesmentioning

confidence: 99%

Recent advance in three-dimensional porous carbon materials for electromagnetic wave absorption

et al. 2022

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With the increasingly serious electromagnetic wave (EMW) pollution, the development of high-performance EMW absorbing materials (EWAMs) has become a hot topic. Carbon-based EWAMs have excellent chemical stability, high electrical conductivity, and strong dielectric loss. In particular, three-dimensional (3D) porous carbon-based EWAMs have been widely developed in the EMW absorption field. The 3D porous structure not only reduces the materials' mass density, but also improves the multiple reflections of incident EMWs and impedance matching. The carbon-based EWAMs are thus expected to achieve the goals of low density, low thickness, wide absorption bandwidth, and strong absorption. Herein, we first restated the relevant theoretical basis and evaluation methods. Then, we summarized the recent research progress of 3D porous carbon-based EWAMs with the source of the materials as the main clue. Some unique and novel viewpoints were highlighted. Finally, the challenges and prospects of 3D porous carbon-based EWAMs were put forward, which is helpful for guiding a further development of high-performance EWAMs.

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Regulating lignin content to obtain excellent bamboo-derived electromagnetic wave absorber with thermal stability

Cited by 96 publications

References 66 publications

Patternable Nanocellulose/Ti₃C₂T_x Flexible Films with Tunable Photoresponsive and Electromagnetic Interference Shielding Performances

Patternable Nanocellulose/Ti₃C₂T_x Flexible Films with Tunable Photoresponsive and Electromagnetic Interference Shielding Performances

Efficient Removal of Pb²⁺ from Water by Bamboo-Derived Thin-Walled Hollow Ellipsoidal Carbon-Based Adsorbent

Recent advance in three-dimensional porous carbon materials for electromagnetic wave absorption

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Regulating lignin content to obtain excellent bamboo-derived electromagnetic wave absorber with thermal stability

Cited by 96 publications

References 66 publications

Patternable Nanocellulose/Ti3C2Tx Flexible Films with Tunable Photoresponsive and Electromagnetic Interference Shielding Performances

Patternable Nanocellulose/Ti3C2Tx Flexible Films with Tunable Photoresponsive and Electromagnetic Interference Shielding Performances

Efficient Removal of Pb2+ from Water by Bamboo-Derived Thin-Walled Hollow Ellipsoidal Carbon-Based Adsorbent

Recent advance in three-dimensional porous carbon materials for electromagnetic wave absorption

Contact Info

Product

Resources

About

Patternable Nanocellulose/Ti₃C₂T_x Flexible Films with Tunable Photoresponsive and Electromagnetic Interference Shielding Performances

Patternable Nanocellulose/Ti₃C₂T_x Flexible Films with Tunable Photoresponsive and Electromagnetic Interference Shielding Performances

Efficient Removal of Pb²⁺ from Water by Bamboo-Derived Thin-Walled Hollow Ellipsoidal Carbon-Based Adsorbent