Nanocomposite electric field screens
The active element of the screen is a developed nanocomposite which is composed of a porous dielectric matrix, in which water is dispersed in the form of crystallization within a hydrate and a network of nano-pores. A screen of this type has high dielectric absorption, which can absorb the frequency ranges from 10 MHz to several GHz. The properties can be altered to tailor the frequency range absorption in order to create band pass and band filter requirements. In the case of our standard non-woven matrix (ADR TEX) we receive a shielding effectiveness of ~ 30 dB in the frequency range of 10 mHz – 1 MHz. These screens are already used in the construction industry (as one of the layers of under-flooring, as part of a roofing membrane), and in the home (under mattresses or incorporated into mattress production), as well as, protective clothing.
Dielectric shields that utilize a silica matrix absorb electric field in the microwave frequency range and are now being developed to reduce noise in the diagnostic research devices of nuclear magnetic resonance (NMR) and electron paramagnetic resonance (EPR). This material is produced to shield humans or to protectively encase a device emitting intense electric fields as in the case of a dielectric welding power supply with a frequency of 27 MHz. In this case, protective clothing made of conductive material (usually a polyamide fabric coated with a layer of silver) cannot be used, as the resulting inductive currents can cause ignition of the material. There is no danger of this with clothing material made with ADR Technology that utilizes the properties of high dielectric absorption.
The shielding properties of the new materials
The developed nanocomposite-dielectric-matrix shields electric field in a range from extremely low frequencies around 10 mHz up to radio frequencies around 1 MHz. The shielded frequency range can be extended up to about 1 GHz. This screen does not require grounding or electrical contacts. The materials from which the screen is made are completely harmless: the dielectric matrix is a non-woven fabric, ceramic, wood or plaster and the dispersed phase are aqueous solutions of ADR-SOL, silicon compounds and minerals. It is also possible to produce a transparent screen.
Figure 1. Dependence of the dielectric absorption (TGD) on frequency of a composite made of a ceramic with different pore size and distribution (fired at different temperatures) and soaked in an aqueous solution of the ADR-SOL modifier. The measurements were taken at a relative humidity of 52% at 296 K.
Figure 2. Shows how to change the frequency range of high dielectric absorption, and therefore the scope for selective screening, a viscose fabric matrix impregnated with an aqueous solution of ADR-SOL with a modifier.
Figure 2 The dielectric absorption spectrum for a sample soaked in water, non-woven viscose (0:1) and non-woven fabric impregnated with the ADR-SOL with modifier for water (1:20), (1:15) and (1:5), measurements were carried out at a temperature of 291 K at a relative humidity of 57%.
The new ADR Technology barrier material is a nanocomposite of a porous dielectric matrix that has high dielectric absorption, it can be widely used for the construction of screens to protect against electromagnetic fields within the frequency range of 10 mHz to 1 MHz, and may be increased up to 1 GHz.
This screen is easy to use because it does not require grounding. A big developmental advantage is the ability to match the absorption frequency characteristics to the application requirements by changing the type and properties of the matrix and the dispersed phase. ADR Technology (Advanced Dielectric Radiation Trap) means that a specially prepared porous dielectric matrices such as ceramics, fabric, wood, “imprison” water molecules that absorb the energy of electric field in low and radio frequencies and therefore eliminate electromagnetic smog. ADR Technology electric field screens are safe to use. These are used as a “personal bodyguard” absorbing electromagnetic radiation in a way similar to the human body, which contains ~ 60% water trapped in different ways in cytoplasm, brain and bones, etc.
Established for the purpose of implementing the invention of Dr. Eng. Stanisław Wosiński The ADR Technology company produces non-woven polypropylene screens and has developed a solution for impregnating plaster walls for both new as well as old walls that have previously been painted. The result of the application on the walls is a significant reduction in the intensity of the electric field generated by the electrical wires distributed in the walls. Also, this is of even greater significance for homes, schools, and offices that are located near power lines. In addition, it is advisable to shield the roof.
For these reasons, the ADR Technology company is looking for cooperation with development companies, manufacturers, the construction industries and distributors to produce and sell under license.
The solution allows for efficient, cheap and easy screening of living quarters, replacing other screening options currently used in these types of projects.
Advantages of modern screening solutions:
- EMF reduction in daily living environments to avoid adverse health effects upon the body.
- Shielding materials provide effective protection against typical electric field generated by household wiring, cables and devices.
- Does not interfere with the earth’s natural electromagnetic field.
- Minimizes the cost to the customer.
Awards and honors
On 6-10 April 2011, The 39th International Exhibition of Inventions was held in Geneva. Our company presented the electric field screen ADR TEX and won the Gold Medal in the category Environmental Protection – Energy.
The graphs below show the results for each situation described.
Test 1. Control (metal spring mattress)
Test 2. ADR TEX on bed (metal spring mattress)
Test 3. ADR TEX on bed and head board (metal spring mattress)
Test 4. Control (plastic spring mattress)
Test 5. ADR TEX on bed (plastic spring mattress)