• 제목/요약/키워드: 극저온 볼밀링

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극저온 볼 밀링을 통한 Ibuprofen 분말의 나노화

  • 조현갑;이경엽;박훈재;이상목
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2004년도 춘계학술대회 논문요약집
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    • pp.158-158
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    • 2004
  • 본 연구에서는 이부프로펜(Ibuprofen)분말을 마이크론(Micron) 크기의 입자로 만들기 위하여 극저온 볼 밀링 공정(Cryogenic Ball Milling Process)을 사용하였다. 극저온 볼 밀링 공정은 약 -18$0^{\circ}C$의 질소 분위기에서 6시간 동안 실행되어 졌다 이부프로펜 분말 형상의 변화는 SEM(Scanning Electronic Microscope)촬영을 통하여 관찰하였으며, 분말의 입자 크기와 분포는 입도 분석기(Particle Size Analysis)를 사용하여 극저온 볼 밀링 공정 전ㆍ후의 변화를 관찰하였다(중략)

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극저온 볼 밀링 공정시 밀링시간 및 속도가 Ibuprofen분말의 입자 크기에 미치는 영향 (The Effect of Milling Time and Speed on the Particle Size of Ibuprofen in the Cryogenic Ball Milling Process)

  • 조현갑;백영남;이경엽
    • 대한기계학회논문집A
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    • 제29권7호
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    • pp.1022-1027
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    • 2005
  • In this study, ball milling process was applied to reduce the particle size of bio-material down to submicron size. The material used was Ibuprofen. The ball milling was performed at low temperature of about $-180^{\circ}C$. The effect of processing conditions (milling time, milling speed) on the particle size was determined. The results showed that the degree of crystallite of Ibuprofen was slightly reduced by the ball milling process. The results also showed that the size of Ibuprofen was significantly reduced by the ball milling process. The effect of milling time was significant within the milling time of six hours while it was small thereafter.

극저온 볼밀링 공정을 이용한 탄소나노튜브의 분산특성 연구 (A Study on the Dispersion Characteristics of Carbon Nanotubes using Cryogenic Ball Milling Process)

  • 이지훈;이경엽
    • 한국정밀공학회지
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    • 제27권7호
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    • pp.49-54
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    • 2010
  • The cryogenic ball milling was performed on carbon nanotubes (CNTs) at an extremely low temperature to increase the dispersion of CNTs. The effects of milling speed and time on the deagglomeration and structural changes of CNTs were studied. FESEM was used to analyze the dispersion and the change of particle size before and after milling process. Transmission electron microscopic (TEM) analysis was also investigated the effect of cryogenic ball milling on the morphological characteristics of CNTs. The structural changes by the cryogenic ball milling process were further confirmed by x-ray diffraction (XRD) and Raman spectroscopic analysis. The results showed that the agglomeration of CNTs was significantly reduced and amorphous structure was observed at high milling speed. However, the milling time has no great effect on the dispersion property and structural change of CNTs compared with milling speed.

극저온 볼 밀링을 통한 Ibuprofen 분말의 나노화II (Nanocrystallization of Ibuprofen by Cryogenic Ball Milling II)

  • 조현갑;이경엽;백영남;박훈재;이상목
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2004년도 추계학술대회 논문집
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    • pp.442-446
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    • 2004
  • Reducing the particle size of drug materials down to submicron is an important matter in pharmaceutical industry. Cryogenic milling technology is one of the mechanical milling processes, which is mostly utilized in refining grain size of metal and ceramics at extremely low temperature environment. This technique has not been readily studied in application to medical and biotechnology. This paper, therefore, describes the application of cryogenic milling process to reduce particle size of Ibuprofen. The shape and size of the Ibuprofen particle before and after the cryogenic ball milling process were analyzed. XRD analysis was performed to examine a change in crystallinity of Ibuprofen by the cryogenic ball milling process. The results showed that the size of Ibuprofen particles was reduced to 1/10 or less of its initial size. The results also showed that the degree of crystallinity of Ibuprofen was slightly reduced after cryogenic ball milling with nitrogen

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극저온 볼 밀링을 통한 Ibuprofen 분말의 마이크로화 (Micronization of Ibuprofen by Cryogenic Ball Milling)

  • 조현갑;이경엽;백영남;박훈재;이상목
    • 한국정밀공학회지
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    • 제21권11호
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    • pp.195-199
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    • 2004
  • For the present study, the cryogenic ball milling process was applied to make Ibuprofen microsized. The cryogenic ball milling was performed at low temperature of about -18$0^{\circ}C$ for 6 hours. The particle size distribution was determined before and after the cryogenic process. X-ray diffraction (XRD) measurement was made to determine the effect of cryogenic process on the crystallinity of Ibuprofen. The results showed that the size of Ibuproffn was reduced about 10 times by the cryogenic process. The degree of crystallinity of Ibuproffn was slightly reduced by the cryogenic process.