Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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Properties of hydroxyapatite sintered body added with plasticizer

Hydroxyapatite 소결체의 가소제 첨가에 따른 특성

  • Ryu, Su Chark (Department of Nanomechatronics Engineering, Pusan National University) ;
  • Kim, Jae Kyu (Department of Nanomechatronics Engineering, Pusan National University) ;
  • Kim, Seung Hyeon (Department of Nano Fusion Technology, Pusan National University)
  • 류수착 (부산대학교 나노메카트로닉스공학과) ;
  • 김재규 (부산대학교 나노메카트로닉스공학과) ;
  • 김승현 (부산대학교 나노융합기술학과)
  • Received : 2019.07.15
  • Accepted : 2019.08.05
  • Published : 2019.08.31
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Abstract

The strength (MPa), hardness (Hv), shrinkage (%) and biological properties of the HAp were measured by using an organic plasticizer which facilitates the molding and heat treatment. Mechanical properties such as compressive strength, bending strength and hardness were increased with increasing amount of plasticizer, but mechanical properties were decreased when plasticizer was added more than 7 %. This is because addition of the plasticizer above the allowable value causes cracking during molding, and such cracks promote the generation of microcracks and pores at the time of sintering, resulting in a decrease in mechanical properties. As a result of the antimicrobial activity test, no bacteria were detected regardless of the addition amount of plasticizer.

HAp의 성형성과 열처리를 용이하게 하는 유기가소제를 사용하여 첨가량에 따른 강도(MPa)와 경도(Hv), 수축율(%) 및 생물학적 특성 중 항균력을 측정하였다. 가소제의 첨가량이 증가할수록 기계적 특성인 압축강도와 굽힘강도, 경도 등이 증가하였으나 가소제의 첨가량이 7%를 넘을 경우 오히려 기계적 특성이 감소하였다. 이는 허용치 이상의 가소제의 첨가는 성형 시 균열을 발생시키고 이러한 균열은 소결 시 내부에 미세균열 및 산화 시 기공의 발생을 촉진시켜 기계적 특성의 감소를 유발한다. 항균성 측정 결과 가소제 첨가량 에 관계없이 균은 검출되지 않았으며 우수한 항균력을 발휘하였다.

Keywords

References

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