Phase specific dispersion of functional nanoparticles in soft nanocomposites resulting in enhanced electromagnetic screening ability dominated by absorption

2017 ◽  
Vol 19 (1) ◽  
pp. 467-479 ◽  
Author(s):  
Aishwarya V. Menon ◽  
Giridhar Madras ◽  
Suryasarathi Bose
Keyword(s):  
Shielding Effectiveness ◽  
Functional Nanoparticles ◽  
Alloy Particles ◽  
Electromagnetic Screening ◽  
Feni Alloy

Phase specific localisation of MWNTs and magnetic FeNi alloy particles resulted in significant electromagnetic (EM) shielding effectiveness in binary co-continuous blends of PVDF and SMA.

A New CCM (Carbon Composite Matrix) Material with Improved Shielding Effectiveness for X-Band Application

2010 ◽  
Vol E93-C (6) ◽  
pp. 929-931 ◽  
Author(s):  
Yeong-Chul CHUNG ◽  
Kyung-Won LEE ◽  
Ic-Pyo HONG ◽  
Kyung-Hyun OH ◽  
Jong-Gwan YOOK
Keyword(s):  
Matrix Material ◽  
Carbon Composite ◽  
Shielding Effectiveness ◽  
Composite Matrix ◽  
X Band

Nanoscale Functional Biomaterials for Cancer Theranostics

2018 ◽  
Vol 25 (25) ◽  
pp. 2987-3000 ◽  
Author(s):  
Linying Liu ◽  
Xiaoshuang Li ◽  
Lei Chen ◽  
Xin Zhang
Keyword(s):  
Brain Cancer ◽  
Molecular Level ◽  
Functional Materials ◽  
Therapeutic Agents ◽  
Lower Side ◽  
Drug Delivery Vehicles ◽  
Functional Nanoparticles ◽  
Delivery Vehicles ◽  
Functional Biomaterials ◽  
Cancer Theranostics

Nanomedicine is widely developed in recent years. In nanomedicine system, nanoscale and nanostructured functional materials are used to manipulate the human biology systems at the molecular level for cancer imaging and therapy. New nanostructure based functional materials consist of nanoscale liposomes, spheres, micelles, capsules, emulsion, suspension and phamacosomes. Several functional nanoparticles such as lipidbased and polymer-based materials are demonstrated to be drug delivery vehicles and imaging agents. These materials are biodegradable, biocompatible and have better biodistribution, lower side effect and lower toxicity. In addition, hybrids with these materials coating provide uniquely electrical, optical and magnetic properties. This review discusses the research on the applications of functional materials, especially nanoparticles as imaging contrast agents, cancer therapeutic agents and multi-functional agents and this review focused on the theranostic integration treatments on liver cancer and brain cancer.

scholarly journals Feasibility Study on the Development of a Deployable Tactical EMP Tent for a Sustainable Military Facility

2020 ◽  
Vol 13 (1) ◽  
pp. 16
Author(s):  
Kukjoo Kim ◽  
Kyung-Ryeung Min ◽  
Young-Jun Park
Keyword(s):  
Korean Peninsula ◽  
Military Operations ◽  
Shielding Effectiveness ◽  
Electromagnetic Pulses ◽  
Fixed Weight ◽  
Operational Readiness ◽  
The Military ◽  
Transaction Price ◽  
Delphi Analysis ◽  
Weight Structures

The Korean peninsula is under increasing threat of electromagnetic pulses (EMPs) from neighboring countries; EMP protection facilities are an essential means of ensuring the operational readiness of the military. However, existing EMP protection facilities are manufactured as fixed-weight structures, which limit the mobility of military operations and lead to the misconception of EMP protection as something only required for higher command. The current military and official EMP protection standards require only a uniform shielding effectiveness of 80 dB. Therefore, this study aims to differentiate the existing uniform level of shielding effectiveness of 80 dB into 80 dB, 60 dB, 40 dB, etc. Further, it seeks to derive the factors to be considered when applying various methods, such as shielding rooms, shielding racks, site redundancy, spare equipment, and portable lightweight protective tents, for recovery of failure, instead of the existing protection facilities that rely on shielded rooms by the Delphi analysis. Then, the applicability of lightweight EMP protection is determined after selecting lightweight materials to build a facility. The electromagnetic shielding performance of 21 types of materials was measured in the 30 MHz–1.5 GHz frequency band using ASTM-D-4935-10. The results showed the possibility of developing a lightweight EMP shielding facility, which would save approximately 316,386 tons of concrete, reducing the CO2 emissions by approximately 9,972,489 tons. Assuming that the Korean carbon transaction price is USD 50/ton CO2, the savings are equivalent to USD 49,862,435.

scholarly journals Optically transparent and very thin structure against electromagnetic pulse (EMP) using metal mesh and saltwater for shielding windows

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Duy Tung Phan ◽  
Chang Won Jung
Keyword(s):  
Electromagnetic Pulse ◽  
Low Cost ◽  
High Energy ◽  
Metal Plate ◽  
Optical Transparency ◽  
Shielding Effectiveness ◽  
Concrete Wall ◽  
Metal Mesh ◽  
Wide Range ◽  
Optically Transparent

AbstractAn electromagnetic pulse (EMP) with high energy can damage electronic equipment instantly within a wide range of thousands of kilometers. Generally, a metal plate placed inside a thick concrete wall is used against an EMP, but it is not suitable for an EMP shielding window, which requires not only strong shielding effectiveness (SE) but also optical transparency (OT). In this paper, we propose a very thin and optically transparent structure with excellent SE for EMP shielding window application. The proposed structure consists of a saltwater layer held between two glass substrates and two metal mesh layers on the outside of the glass, with a total thickness of less than 1.5 cm. The SE and OT of the structure are above 80 dB and 45%, respectively, which not only meet the requirement of EMP shielding for military purposes but also retain the procedure of good observation. Moreover, the OT of the structure can be significantly improved using only one metal mesh film (MMF) layer, while the SE is still maintained high to satisfy the required SE for home applicants. With the major advantages of low cost, optical transparency, strong SE, and flexible performance, the proposed structure can be considered a good solution for transparent EMP shielding windows.

scholarly journals Interface Engineered Microcellular Magnetic Conductive Polyurethane Nanocomposite Foams for Electromagnetic Interference Shielding

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Guolong Sang ◽  
Pei Xu ◽  
Tong Yan ◽  
Vignesh Murugadoss ◽  
Nithesh Naik ◽  
...  
Keyword(s):  
Electromagnetic Interference ◽  
Magnetic Loss ◽  
Interfacial Polarization ◽  
Conductive Network ◽  
Shielding Effectiveness ◽  
Electromagnetic Interference Shielding ◽  
Multiple Reflections ◽  
Conduction Loss ◽  
Composite Foams ◽  
Emi Se

Abstract Lightweight microcellular polyurethane (TPU)/carbon nanotubes (CNTs)/ nickel-coated CNTs (Ni@CNTs)/polymerizable ionic liquid copolymer (PIL) composite foams are prepared by non-solvent induced phase separation (NIPS). CNTs and Ni@CNTs modified by PIL provide more heterogeneous nucleation sites and inhibit the aggregation and combination of microcellular structure. Compared with TPU/CNTs, the TPU/CNTs/PIL and TPU/CNTs/Ni@CNTs/PIL composite foams with smaller microcellular structures have a high electromagnetic interference shielding effectiveness (EMI SE). The evaporate time regulates the microcellular structure, improves the conductive network of composite foams and reduces the microcellular size, which strengthens the multiple reflections of electromagnetic wave. The TPU/10CNTs/10Ni@CNTs/PIL foam exhibits slightly higher SE values (69.9 dB) compared with TPU/20CNTs/PIL foam (53.3 dB). The highest specific EMI SE of TPU/20CNTs/PIL and TPU/10CNTs/10Ni@CNTs/PIL reaches up to 187.2 and 211.5 dB/(g cm−3), respectively. The polarization losses caused by interfacial polarization between TPU substrates and conductive fillers, conduction loss caused by conductive network of fillers and magnetic loss caused by Ni@CNT synergistically attenuate the microwave energy.

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