ELECTROMAGNETIC SHIELDING AGAINST ELECTROMAGNETIC INFERENCE USING COATINGS BASED FERROMAGNETIC METALS

Autor/autori: CS II dr. ing. Raluca Maria AILENI, CS ing. Laura CHIRIAC,CS III dr. ing. Cristian MORARI, CS II dr. ing. Ion Razvan RADULESCU

Rezumat: Aceasta lucrare prezinta cateva aspecte privind ecranarea electromagnetica prin intermediul structurilor textile tratate initial in RF plasma pentru hidrofilizare si ulterior cu paste conductive pe baza de particule de nichel. Partea experimentala a fost realizata pe baza unui plan experimental proiectat utilizand metoda planului factorial fractionat. Pentru proiectarea experimentelor au fost utilizate ca variabile independente concentratia de nichel, parametrii de lucru in plasma (putere, debit gaz, presiune, timp) , rezistenta electrica de suprafata si densitatea fluxului electromagnetic generat de un aparat electronic inainte si dupa acoperirea cu un material textil tratat cu paste conductive pe baza de nichel. Prin utilizarea tratamentelor in RF plasma cu gaz de lucru oxigen (O2) tesatura cruda din bumbac crud a fost hidrofilizata in scopul utilizarii ulterioare ca suport pentru depunerea pastelor conductive pe baza de particule de nichel. De asemenea, tratamentele in RF plasma O2 genereaza o amprenta de carbon scazuta si poate fi utilizata pentru inlocuirea tratamentelor de finisare clasice, generand consumuri scazute de apa, substante chimice si timp redus de executie (1-5 minute). Hidrofilia tesaturii a fost investigata utilizand aparatul VCA Optima, inainte si dupa tratatea in RF plasma cu gaz de lucru O2.

Cuvinte cheie: ecranare electromagnetic─â, textile, plasma, conductiv


Abstract: This paper presents some aspects of electromagnetic shielding through textile structures initially treated in RF plasma for hydrophilization and subsequently with conductive pastes based on nickel particles. The experimental part was carried out based on an experimental plan designed using the fractional factorial plan method. For the design of the experiments were used as independent variables nickel concentration, working parameters in plasma (power, gas flow, pressure, time), electrical surface resistance and electromagnetic flow density generated by an electronic apparatus before and after coating with a textile material treated with a conductive paste based on nickel. Using treatments in RF plasma with oxygen (O2) working gas, the raw fabric made of 100% cotton has been hydrophilized for later use as support for deposition of the conductive paste based on nickel particles. Also, treatments in RF plasma O2 generate a low carbon footprint and can be used to replace classical finishing treatments, generating low water consumption, chemicals and low execution time (1-5 minutes). The hydrophilic effect of the fabric was investigated using the VCA Optima device before and after the treatment in RF plasma O2.

Keywords: electromagnetic shielding, textile, plasma, conductive.

 

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