Clean Technology (청정기술)

The Korean Society of Clean Technology (한국청정기술학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on the Applicability of $C_5$ Hydrofluoroether-based Formulated Cleaning Agents as CFC-Alternatives

$C_5$계 수소불화에테르를 기반으로 하는 배합 세정제의 CFC 대체세정제 적용 연구

  • Min, Hye-Jin (Dept. of Chemical Engineering, The University of Suwon) ;
  • Bae, Jae-Heum (Dept. of Chemical Engineering, The University of Suwon) ;
  • Chang, Yoon-Sang (Dept. of Mechanical Engineering, The University of Suwon)
  • 민혜진 (수원대학교 화학공학과) ;
  • 배재흠 (수원대학교 화학공학과) ;
  • 장윤상 (수원대학교 기계공학과)
  • Received : 2010.08.17
  • Accepted : 2010.09.06
  • Published : 2010.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

Hydrofluoroethers (HFEs) with fluoride molecules in their structure which are evaluated as the third generation replacement alternatives to chlorofluorocarbons (CFCs) are known to be excellent for removal of nanoparticles and fluoride-type soils due to their low surface tension and high wetting index. In addition, HFEs have good physical properties with no flash point and excellent drying characteristics. But, HFEs also have shortcomings in that they are not effective for removal of organic soils due to their poor solubility in soil. In this study, $C_5$ HFE-based cleaning agents were formulated through addition of solvents such as isopropyl alcohol (IPA), ethyleneglycol monoether (EG), propyleneglycol monoethylether (PM) to HFE-7100 [$CF_3CF_2CF_2CF_2OCH_3$] or HFE-mec-f [$CF_3CHF=CF_2OCH_2CF_3$] with its maximum amount, respectively, in order to have no flash point for the safety in the working environment. These solvents are known to be excellent for dissolving organics in soil. Their physical properties and cleaning abilities for fluxes, water-insoluble cutting oils, and fluoride-type oils were evaluated and compared with those of other cleaning agents with single components. The experimental results show that the HFE-based formulated cleaning agents have various good physical properties which are almost similar to those of a single type of HFE cleaner. They show excellent cleaning ability for fluxes, water-insoluble cutting oils, and fluoride-type oils. These results indicate that the HFE-based formulated cleaning agents can be applicable to various industrial cleaning fields because of their good physical properties and cleaning abilities for various soils.

CFC 세정제의 제3 세대 대체세정제로 평가되는 수소불화에테르(hydrofluoroether; HFE)는 불소분자를 함유하고 있어 표면장력이 낮고 습윤지수가 커서 미세입자제거와 불소계 오염물 제거에 우수하고 인화점이 없고 건조성이 뛰어난 물성을 가지고 있지만, 유기물의 용해력은 떨어져 유기 오염물 제거에는 효율적이지 못하다. 본 연구에서는 $C_5$계 HFE인 HFE-7100 [$CF_3CF_2CF_2CF_2OCH_3$]와 HFE-mec-f[$CF_3CHF=CF_2OCH_2CF_3$]에 유기물질의 용해력이 비교적으로 뛰어난 isopropyl alcohol (IPA), ethyleneglycol monoether (EG), propyleneglycol monoethylether (PM)를 인화점이 나타나지 않는 최대량을 각각 첨가하여 $C_5$계 HFE 기반의 배합세정제를 제조하여 물성과 여러 종류의 플럭스, 비수용성 절삭유, 불소계 오일에 대한 세정성 평가를 수행하였다. 실험 결과 $C_5$계 기반의 배합세정제는 단일 불소계 세정제의 여러 가지 물리적 성질의 장점을 가지는 것으로 나타났다. 그리고 $C_5$계 기반의 배합세정제는 첨가된 용제에 따라 약간의 차이는 있지만 대체적으로 플럭스, 비수용성 절삭유, 불소계 오일에 우수한 세정력을 나타내어 여러 산업세정 분야에 적용가능성을 보여주었다.

Keywords

References

  1. Tsai, W. T., "Environmental Risk Assessment of Hydrofluororethers (HFEs)," J Hazard. Mater., A119, 69-78 (2005).
  2. Lim, S. Y., "Montreol Protocol and Status of Supply and Demand of Ozone Destruction Material in Domestic Market," Seminar and Workshop for Environmental-friendly Industrial Cleaning, Korea Testing and Research Institute/The University of Suwon, 2-22 (2010).
  3. Seika, A., and Misaki, S., "The Potential of Hydrofluoroethers to Replace CFCs, HCFCs and PFCs," J Fluorine Chem., 101(2), 215-221 (2000). https://doi.org/10.1016/S0022-1139(99)00162-1
  4. Flecher, L. E., Zugno, R., and Dimas, J., "Pipe Cleaning Using HFE Solvents and Assesment of Particle Contamination Found during Pipe Connection," Flammability and Sensitivity of Materials in Oxygen-Enriched Atmospheres: Tenth Volume ASTM STP 1454, Steinberg , T. A. Beeson, H. D. and Newton, B. E., Eds., ASTM International, West Conshhocken, PA, 2003.
  5. Middleman, K. J., Herbert, J. D. and Reid, R. J., "Cleaning Stainless Steel for Use in Accelerators - Phase 1" Vacuum, 81, 793-798 (2007). https://doi.org/10.1016/j.vacuum.2005.11.057
  6. Bishop, M., "Cautions on Using HFE-71DE for Gauge Cleaning," Currents (3M Corp.), 56-58 (2006).
  7. Min, H. J., Shin, J. H., Bae, J. H. Kim, H. G., and Lee, H. J., "A Syudy on Applicability of Hydrofluoroethers as CFCAternative Cleaning Agents," Clean Tech., 14(3), 184-192 (2008).
  8. Robins Air Force Base, "Process and Alternative Evaluation Report - BLDG 169 Vapor Degreasing," WR-ALC/EMP Robins Air Force Base, Georgia, January 2000.
  9. Lee, H. J., "A Study on the Development of $C_{5}$ Hydrofluoroethers," Final Report, UCM2199-8649-6, Korea Institute of Science and Technology, September, 2009.
  10. Min, H. J., "Studies on Applicability of Hydrofluoroether- based Cleaning Agents as CFC-alternative Ones and Evaluation of Cleaning Ability of Ionic Reductive Water and Investigation of its Emulsification Effect in Formulated Lotion," Master Thesis of Chemical Engineering, the University of Suwon 2009.
  11. Yoon, H. J., and Lim, C. S., "A Study on Evaluation of Cleaning Ability of Hydrofluoroethers as Alternative Cleaning Agents," Bachelor Thesis of Chemical Engineering, the University of Suwon 2008.