| 학회 |
한국화학공학회 |
| 학술대회 |
2010년 가을 (10/21 ~ 10/22, 대전컨벤션센터) |
| 권호 |
16권 2호, p.1429 |
| 발표분야 |
미립자공학 |
| 제목 |
Synthesis of mesoporous CaCO3 particles by a spray drying method from the stable suspensions achieved in a beads mill |
| 초록 |
Dispersion of nanoparticles in liquids is an important issue on various applications. CaCO3 agglomerates were disintegrated into its nanoparticles by a beads mill. The dynamic light scattering (DLS) method showed the size of dispersed particles of 22 nm reduced from the initial size of 130 nm. The effectiveness of smaller beads on the dispersion was explained by their enough impact energy and their high collision frequency. No further grinding of nanoparticles by the beads was explained by the short relaxation time of nanoparticles. The mesoporous CaCO3 particles were synthesized from the stable suspensions by the spray drying method. As the dispersion air flowrate increased, the particle size decreased due to the smaller droplet size. Non-spherical particles were explained with the velocity difference between the colloidal solution and the dispersion air, with the longer momentum transfer time and with the faster evaporation rate. The pores originated from the spaces between the beads-milled particles, which was also created by the shear force. |
| 저자 |
이진우, 조 국, 서용재, 장한권, 장희동
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| 소속 |
한국지질자원(연) |
| 키워드 |
Dispersion mechanism; Beads mill; Disintegration; Agglomerates; Mesoporous particle
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| E-Mail |
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| 원문파일 |
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