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건식 충격혼합법을 이용한 복합 무기안료의 제조 및 물성에 관한 연구

Studies in Preparation and the Properties of Composites Inorganic Pigments by Utilizing Dry-Impact Blending Method

조준형^† 민동진

Jun-Hyung Cho^† Dong-Jin Min

강원대학교 제지공학과, 춘천 200-701

Dept. of Paper Science & Engineering, Kangwon National University, Chunchon 200-701, Korea

jhcho@cc.kangwon.ac.kr

HWAHAK KONGHAK, December 2001, 39(6), 744-749(6), NONE

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Abstract

본 연구에서는 제지 도공용으로 사용되고 있는 무기안료인 TiO₂, CaCO₃, clay를 건식 충격혼합법을 이용하여 기능성 복합안료로 제조하였다. 건식 충격혼합법은 미분체를 표면개질, 복합화하여 새로운 기능재료를 설계하는 것이다. 무기안료의 입도를 고려하여 선택된 모립자와 자립자를 적당한 배합비로 혼합하였고 분체의 대전현상을 이용하여 주로 정전기력에 의해 모립자 주위에 자립자를 부착시킨 다음 고속기류 중 충격력으로 고정화처리하였다. 고정화처리된 복합안료는 분체물성측정기를 통해 유동성 및 분류성이 개선되었고 광학적 성질도 우수함을 알 수 있었다. 분체의 안료설계 및 제지분야에의 적용이 복합적으로 실현될 수 있기 때문에 단계적으로는 원리적 측면과 응용 측면에서의 보완이 가능하고 다양한 기능성 지류제품 제조에 연구 및 개발 기회를 확대할 수 있을 것으로 사료된다.

In this paper the functional composite-pigment was prepared by dry impact-blending method, using inorganic materials used for paper coating such as TiO₂, CaCO₃, and clay. Dry impact-blending is used for making new functional material by surface modification and composition. After considering particle size of inorganic pigment, selected core powder and fine powder were mixed at a suitable mixing ratio. When powder was electrified, the fine particles of them could be adhered on the larger ones called'core particles' by static electricity, and then formed an ordered mixture. Afterward, these were susceptible to be composited by impact force resulting from very high-speed air circulation. Composite pigment formed was tested with powder physics tester and resulted in improvement of both fluidity and flushing. It also resulted in excellent optical property. Since design of particle pigment and application to a field of paper can be come true, it is thought that complementation in terms of both principle and application is possible, and that R&D for the production of various functional paper products can be activated.

Keywords

Composite-Pigment Impact-Blending Paper-Coating Core Particles Fine Particles

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