Abstract
The technology has been proposed for manufacturing a textile material that contains ferromagnetic nanoparticles for shielding electromagnetic fields. It has been shown that the most effective method of sticking together between nano-particles and the fibers of the textile material is the application of magnetic liquid with nanoparticles on the material and its exposure in a heterogeneous permanent magnetic field. Under the condition of a magnetic field intensity of 450 A/m and the exposure to it for 12 hours, the implantation of the nanoparticles into the linen fabric becomes almost irreversible. The protective properties of the developed material have been investigated. When impregnated with a magnetic liquid in the amount of 45–50 g/m2 (a ferromagnetic particle content of 9 % by weight), the material's shielding coefficients for 1–3 layers amount to: for the electric field of industrial frequency 1.4÷4.8; for a magnetic field, 1.9÷8.1. Following the magnetic treatment, these indicators are 2.9÷8.6 and 2.3÷8.9, respectively. In order to remove technological components such as vacuum oil and oleic acid from the magnetic fluid, it would suffice to apply a synthetic detergent, which has been confirmed by experimentally.We have investigated the efficiency of the obtained result under actual industrial conditions. It was established that the decrease in the magnetic field intensity of industrial frequency and its inter-harmonics by a single layer of the impregnated material without magnetic treatment is 1.4, with a magnetic treatment ‒ 2. In this case, there is no significant decrease in the level of the natural geomagnetic field. We have modeled the distribution of a magnetic field in the human body for the case of manufacturing a protective suit from the developed material. Under the conditions of a warranted reduction in the magnetic field intensity by 2 times in critical places, an increase in the field level is observed in the cervical region due to the increase in the magnetic resistance in this region. This should be considered when designing the protective suit configuration
Highlights
Current requirements for the occupational safety of personnel operating the sources of electromagnetic fields [1]imply the availability of individual and collective protection means
The World Health Organization applies the principle of ALARA (As Low As Reasonably Achievable) to electromagnetic fields
The authors of work [10] theoretically substantiated and performed a computational experiment on the use of a magnetic liquid as a magnetic screen. They considered a layer of the magnetic liquid, which is impossible to obtain under actual conditions; the results indicate the prospects of its application
Summary
Current requirements for the occupational safety of personnel operating the sources of electromagnetic fields [1]. Imply the availability of individual and collective protection means This is because the electric and magnetic fields of anthropogenic origin are harmful to human health. The World Health Organization applies the principle of ALARA (As Low As Reasonably Achievable) to electromagnetic fields This means that the magnitudes of electromagnetic fields must be minimized if technical capabilities are available. The main requirements for such materials are reasonable coefficients of shielding an electric field, a magnetic field of ultralow (industrial) frequency and its harmonics, manufacturability, and reasonable cost. Such materials must withstand mechanical and thermal treatment (washing, chemical cleaning, etc.) without significant loss of protective properties. It is a relevant task to design an innovative material suitable for the manufacture of personal protective equipment against the effect of electromagnetic fields
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
