Effect of Chemical Parameters on Aqueous Acrylamide Gelcasting

수용성 Acrylamide 겔캐스팅에 대한 화학적 변수의 영향

  • Yun, Seog-Eun (Department of Industrial Chemistry Chungnam National University) ;
  • Woo, Sang-Kuk (Korea Institute of Energy Research) ;
  • Bae, Kang (Korea Institute of Energy Research) ;
  • Kim, Dong-Pyo (Department of Industrial Chemistry Chungnam National University)
  • 윤석은 (충남대학교 공업화학과) ;
  • 우상국 (한국에너지기술연구소) ;
  • 배강 (한국에너지기술연구소) ;
  • 김동표 (충남대학교 공업화학과)
  • Received : 1999.05.10
  • Accepted : 1999.06.28
  • Published : 1999.08.10

Abstract

In gelcasting process of the Si powder slurry mixed with acrylamide monomers, it was characterized the effects of chemical parameters such as monomers and additives(polymerization initiator, catalyst and dispersant), Si powder and humidity at drying on processing parameters such as viscosity and idle time as well as on shrinkage and mechanical strength of green bodies. Generally, idle time decreased as initiator and catalyst amounts were increased, but rather depended on initiator. Idle times of the slurries greatly decreased to less than 1/2 time of the premix solutions in which gelation was delayed at higher MBAM portion as a crosslinking monomer. And fluidity of the slurries became worse at greater than 0.6 wt % dispersant. The green bodies showed only less than 7% of linear shrinkage without crack and distortion when dried for longer than 300 hrs under 98% humidity. Typically, the dried bodies containing 40, 50 vol % of Si powder displayed 64 and 36 Mpa in average, respectively.

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