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Dispersion of Ba-ferrite Particles and Physical Properties of Melt-Blown PP/Ba-ferrite Nonwoven Fabrics  

Choi, Ji-Sun (Composite Materials Team, Nanomaterials Application Division, Korea Institute of Ceramic Eng. & Tech.)
Lee, Dong-Jin (Composite Materials Team, Nanomaterials Application Division, Korea Institute of Ceramic Eng. & Tech.)
Publication Information
Textile Science and Engineering / v.43, no.6, 2006 , pp. 321-327 More about this Journal
Abstract
The size of Ba-ferrite particles was decreased from $0.7{\mu}m\;to\;0.5{\mu}m$ by ball-milling according to SEM observation. The surface of Ba-ferrite particles was treated with stearic acid in order to improve dispersion stability in the polymer matrix. PP composites containing the surface treated Ba-ferrite particle as a magnetic particulate filler were prepared in the form of pellet from PP resin and Ba-ferrite powder by a melt compounding using a single extruder. PP/Ba-ferrite composite fabrics by a melt-blown spinning system were prepared. The relationship between the properties of PP/Ba-ferrite composite fabrics and melt-blown processing factors was investigated with these specimens. A fiber diameter and tensile strength were decreased as die to collector distance increased or as screw turning force decreased. The crystallinity was decreased with increasing Ba-ferrite content according to XRD. It was assumed that the orientation of crystalline domain in the neat PP without Ba-ferrite was increased by drawing in mechanical direction, however, the orientation in the PP composite was decreased according to XRD analysis. A coercive force, maximum magnetization and residual magnetization were increased with the screw turning force. According to the result of TGA measurement, the heat resistance was increased with the Ba-ferrite content and decreasing the die to collector distance.
Keywords
dispersion; Ba-ferrite; melt-blown; PP; nonwoven fabric;
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Times Cited By KSCI : 3  (Citation Analysis)
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