Clean Technology (청정기술)

The Korean Society of Clean Technology (한국청정기술학회)
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Recrystallization of RDX High Energy Material Using N,N-Dimethylformamide Solvent and Supercritical $CO_2$ Antisolvent

디메틸포름아마이드 용매와 초임계 이산화탄소 역용매를 사용한 RDX 고에너지 물질의 재결정

  • Kim, Chang-Ki (Department of Chemical Engineering, Hannam University) ;
  • Lee, Byung-Chul (Department of Chemical Engineering, Hannam University) ;
  • Lee, Youn-Woo (School of Chemical and Biological Engineering, Seoul National University) ;
  • Kim, Hyoun-Soo (Agency for Defense Development)
  • 김창기 (한남대학교 생명나노과학대학 나노생명화학공학과) ;
  • 이병철 (한남대학교 생명나노과학대학 나노생명화학공학과) ;
  • 이윤우 (서울대학교 공과대학 화학생물공학부) ;
  • 김현수 (국방과학연구소)
  • Published : 2009.12.31
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Abstract

Supercritical fluid processes have gained great attention as a new and environmentally-benign method of preparing the microparticles of energetic materials like explosives and propellants. In this work, RDX (cyclotrimethylenetrinitramine) was selected as a target explosive. The microparticle formation of RDX using supercritical anti-solvent (SAS) recrystallization process was performed and the effect of operating variables on the size and morphology of prepared particles was observed. N,N-Dimethylformamide was used as organic solvent for dissolving the RDX. The size of the RDX particles decreased remarkably up to less than $10\;{\mu}m$ by SAS recrystallization. In the range of operating conditions of the SAS process studied in this work, the finest RDX particles were obtained at 313.15K, 150 bar, and 15wt% RDX concentration in feed solution.

초임계유체공정은 고폭화약이나 추진제로 사용되는 고에너지 물질을 미세입자로 제조하기 위한 새롭고 환경친화적인 방법으로 큰 관심을 받아 왔다. 본 연구에서는 고폭화약 대상물질로서 RDX(cyclotrirnethylenetrinitramine)을 선정하여 초임계역용매 재결정공정을 이용하여 RDX를 미세입자로 제조하는 연구를 수행하였다. 제조된 입자의 크기와 형상에 미치는 초임계공정 운전변수의 영향을 관찰하였다. 본 연구에서는 RDX를 용해시키기 위한 유기용매로 N,N-dimethylformamide를 사용하였다. 초임계역용매 재결정공정에 의해 RDX 입자들의 크기는 $10\;{\mu}m$ 이하로 뚜렷하게 감소하였다. 본 연구에서 설정한 공정변수의 범위에서 재결정되는 RDX 입자들의 크기를 관찰한 결과, 313.15K, 150 bar, 그리고 주입용액에서의 RDX의 농도가 15wt%일 때 가장 작은 RDX 입자가 재결정되었다.

Keywords

References

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