On the mechanism of charge storage in melt-blown fibrous polymer materiale.

• Autorzy: Goldade V. , Pinchuk l. , Zotov S. , Kravtsov A. , Rychkov A.
• Konferencja: APTADM 2007, III International Conference on Advances in Processing Testing and Application of Dielectric Materials., September, 26-28, 2007 Wrocław, Poland
• Języki publikacji: EN

Abstrakty

EN

The mechanisms of electrization and charge storage of polymer fibers (PE and PP) produced by the melt blowing technology have been studied. A physical model is proposed of the fibrous structure formation. The model is based on representations of electrostatic attraction of fibers carrying a process (technological) charge. It is possible to impart unlike charges during melt blowing to different parts of the fibers found in the viscous flow state. Interaction of unlike charges leads to two main types of fiber bonding. The first type is formed when the fibers get fused at intersection and form thereby so-called nodes. The nodes are mechanically balanced structures that undergo destruction during polymer melting, i.e. at T> Tm. The other type of joints appears when the contact is formed without melting of unlikely charged parts of the fibers. These bonds break at T< Tn] under the action of stresses in the fibrous samples at heating. Using a mini-electrode, differences in the spectra of thermally stimulated currents (TSC) have been recorded during charge relaxation in various zones of fiber contacts. As a result of forced electrization of the fibers in the field of the negative corona discharge, an efficient surface charge density has been reached in the polymer fibrous materials, equal to 20 nC/cm2. Structural traps in the oxidized surface layer of the fibers were found to be filled by the charge carriers due to the injective and dipolar-oriented mechanisms of polarization. Fiber modification by phosphorus trichloride PC13 elevates stability of the electret charge in the fibrous materials and results in a shift of the main relaxation TSC peak into the region of high temperatures. This fact confirms that high-energy traps have been formed, from which the charge is liberated under the temperature above the polymer melting point Tuv.

Słowa kluczowe

EN

polymer fibers; electret charge; mechanisms of polarization; fiber modification; phosphorus-containing nanostructures

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Prace Naukowe Instytutu Podstaw Elektrotechniki i Elektrotechnologii Politechniki Wrocławskiej. Konferencje
• Rocznik: 2007
• Tom: Vol. 46, nr 19
• Strony: 185--190
• Opis fizyczny: Bibliogr. 8 poz.

Twórcy

autor

Goldade V.

autor

Pinchuk l.

autor

Zotov S.

autor

Kravtsov A.

autor

Rychkov A.

• V.A. Belyi Metal-Polymer Research Institute of NASB

Bibliografia

• [1] Pinchuk L.S., Goldade V.A., Makarevich A.V., Kestelman V.N., Melt blowing. Equipment, technology, and polymer fibrous materials. Springer, Berlin-Heidelberg 2002.
• [2] Kravtsov A.G., Goldade V.A., Zotov S.V., Polymer electret filtering materials for breathing organs protection, MPRI NANB, Gomel 2003 (in Rus.).
• [3] Kravtsov A.G.. Electric and magnetic fields in polymer fibrous filtering elements fine purification of multiphase media. Dr. Sci. Thesis, MPRI NANB, Gomel 2007 (in Rus.).
• [4] Goldade V.A., Kravtsov A.G., Gorokhovat-Sky Yu.A., Temnov D.E., Kuvsh1nova O.V., Study of electret state of polymer fibrous materials by methods of thermoactivation current spectroscopy. Material Science, No. 8, 2001, pp. C. 7-11 (in Rus.).
• [5] Kravtsov A.G., Goldade V.A., Zotov S.V., Electret properties peculiar to fibrous polymer materials. Proc. Intern. Conf. "Advances in Processing, Testing and Application of Dielectric Materials" (APTADM 2004), Wroclaw 2004, pp. 9-15.
• [6] Rychkov A.A., Malygin A.A.. Trifonov S.A. Rychkov D.A., Influence of chemical modifying 6 polyteiraftuoroethylene surface on its electret properties J. of Appl. Chem.. Vol. 77, No. 2, 2004, pp. 280-284 (in Rus.).
• [7] Rychkov A.A., Rychkov D.A. Trifonov S.Av Stability of electret state in polymers with modifying surface. Trans, of A.I. Hertzen RSPU: Natural and exact sciences: Science Journal. S.-Pb., No. 4 (8), 2004, pp. 122-134 (in Rus.).
• [8] Gorokhovatsky Yu., Temnov D„ Marat-Mendes J.N., Dias J.M.. Das-Gupta D.K., On the nature of thermally stimulated discharge current spectra in polyethyieneterephtalate, J. Appl. Phys., Vol. 83, No. 10, 1998, pp. 5337-5341.