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논문 기본 정보

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학위논문
저자정보

박재연 (과학기술연합대학교, 과학기술연합대학원대학교)

발행연도
2017
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과학기술연합대학교 논문은 저작권에 의해 보호받습니다.

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In this study, the dielectric paste was fabricated using polystyrene-block-polyisoprene-block-polystyrene (SIS) as polymer matrix and barium titanate (BT) as dielectric filler in order to produce organic-inorganic composite for 3D inkjet printing applications. Since a high loading of filler is required to realize a high dielectric properties, the surface of inorganic filler was modified with two different phosphonic acids having functional groups resembling the groups contained in the block copolymer for higher compatibility of fillers with the polymer matrix. With the incorporation of 80 wt.% BaTiO3 in SIS, the dielectric constant was increased to about 3 times higher than that of bare SIS and the surface modification of fillers resulted in suppressed dielectric loss and improved dispersion of them. The dispersion of the fillers in the polymer matrix was investigated by 3D scanning microscope images of each composite films. The rheology of the paste was optimized through fine tuning of total solid content, and consequently, the potential as 3D printable paste was demonstrated through layer by layer printed structure.

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