Recent progress in the modification of carbon materials and their application in composites for electromagnetic interference shielding

Nazir, Ahsan; Yu, Haipeng; Wang, Li; Haroon, Muhammad; Ullah, Raja Summe; Fahad, Shah; Naveed, Kaleem‐ur‐Rahman; Elshaarani, Tarig; Khan, Amin; Usman, Muhammad

doi:10.1007/s10853-018-2122-x

Cited by 63 publications

(33 citation statements)

References 144 publications

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“…Such materials are featured by well-developed specific surface area, large pore volume, and very good mechanical, thermal, and chemical stability. It allows for a wide range of post-synthetic modifications/functionalizations to proceed, for example, via grafting [ 15 ], impregnation [ 16 ], and sulfonation [ 17 ], but mostly through diverse oxidation [ 18 , 19 , 20 ]. Different oxidizing agents at varied temperatures enrich OMCs’ surface in additional functional groups [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Design of Paracetamol Delivery Systems Based on Functionalized Ordered Mesoporous Carbons

et al. 2020

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The oxidized ordered mesoporous carbons of cubic and hexagonal structure obtained by two templating methods (soft and hard) were applied for the first time as delivery systems for paracetamol—the most common antipyretic and analgesic drug in the world. The process of carbon oxidation was performed using an acidic ammonium persulfate solution at 60 °C for 6 h. The functionalization was found to reduce the specific surface area and pore volume of carbon materials, but it also led to an increasing number of acidic oxygen-containing functional groups. The most important element and the novelty of the presented study was the evaluation of adsorption and release ability of carbon carriers towards paracetamol. It was revealed that the sorption capacity and the drug release rate were mainly affected by the materials’ textural parameters and the total amount of surface functional groups, notably different in pristine and oxidized samples. The adsorption of paracetamol on the surface of ordered mesoporous carbons occurred according to different mechanisms: donor–acceptor complexes and hydrogen bond formation. The adsorption kinetics was assessed using pseudo-first- and pseudo-second-order models. The regression results indicated that the adsorption kinetics was more accurately represented by the pseudo-second-order model. Paracetamol was adsorbed onto the carbon materials studied following the Langmuir type isotherm. The presence of oxygen-containing functional groups on the surface of ordered mesoporous carbons enhanced the amount of paracetamol adsorbed and its release rate. The optimal drug loading capacity and expected release pattern exhibited oxidized ordered mesoporous carbon with a hexagonal structure obtained by the hard template method.

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Section: Introductionmentioning

confidence: 99%

Design of Paracetamol Delivery Systems Based on Functionalized Ordered Mesoporous Carbons

et al. 2020

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“…18,19 Owing to their high conductivity, MWCNTs/polymer composites were frequently reported as reection-dominant shielding materials with shielding effectiveness proportional to the concentration of MWCNTs in matrix. 12,[20][21][22] However, microwave reection is still undesirable because the reected waves may bring negative effects to the surroundings. High-performance EM wave absorbers have attracted much attention recently.…”

Section: Introductionmentioning

confidence: 99%

Layered composites composed of multi-walled carbon nanotubes/manganese dioxide/carbon fiber cloth for microwave absorption in the X-band

et al. 2019

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“…Electromagnetic interference (EMI) has become a major problem with the exponential growth of more small and functional electronic devices. Electronic components (such as high speed processors) produce unwanted electromagnetic energy, affecting the performance and lifetime of other such components by interference [1,2,3]. It may cause loss of stored data, and temporary as well as permanent disruption of important functions.…”

Section: Introductionmentioning

confidence: 99%

PS/PANI/MoS2 Hybrid Polymer Composites with High Dielectric Behavior and Electrical Conductivity for EMI Shielding Effectiveness

et al. 2019

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Liquid exfoliated molybdenum disulfide (MoS2) nanosheets and polyaniline (PANI) nanoparticles are dispersed in polystyrene (PS) matrix to fabricate hybrid polymer composites with high dielectric and electromagnetic interference (EMI) shielding behavior. A phase-separated morphology is formed when PANI and MoS2 are incorporated into polystyrene (PS) matrix. An increasing concentration of MoS2 nanoparticles inside PS/PANI (5 wt %) polymer blend forms an interconnected network, resulting in high electrical conductivity and dielectric behavior, making them a suitable candidate for EMI shielding application. An increment in dielectric constant and loss, up to four and five orders of magnitude, respectively, is recorded at a maximum concentration of 1 wt % of MoS2 in PS/PANI-5 polymer blend at 100 Hz. The enhanced dielectric characteristics for PS/PANI/MoS2 composites are then theoretically evaluated for the estimation of EMI shielding effectiveness in the frequency range of 100 Hz to 5 MHz. The maximum dielectric constant and loss achieved for PS/PANI-5 wt %/MoS2-1 wt % are responsible for estimated shielding effectiveness of around 92 dB at 100 Hz. The increase in dielectric behavior and shielding effectiveness is probably due to the increased number of charged dipoles accumulated at the insulator–conductor interface.

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Recent progress in the modification of carbon materials and their application in composites for electromagnetic interference shielding

Cited by 63 publications

References 144 publications

Design of Paracetamol Delivery Systems Based on Functionalized Ordered Mesoporous Carbons

Design of Paracetamol Delivery Systems Based on Functionalized Ordered Mesoporous Carbons

Layered composites composed of multi-walled carbon nanotubes/manganese dioxide/carbon fiber cloth for microwave absorption in the X-band

PS/PANI/MoS2 Hybrid Polymer Composites with High Dielectric Behavior and Electrical Conductivity for EMI Shielding Effectiveness

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