Elastomers and Composites

The Rubber Society of Korea (한국고무학회)
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Application of Various Types of Surfactants for Improving Hydrophilic Properties of Polyvinylsiloxane Dental Rubber Impression Materials and its Effects on Physical Properties

폴리비닐실록산 치과용 고무인상재의 친수성 향상을 위한 계면활성제의 응용과 물성에 미치 는 영향

  • Park, Yeong-Joon (Dept. of Dental Science, Graduate School Chonnam National University) ;
  • Hwang, Moon-Jin (Dept. of Dental Science, Graduate School Chonnam National University) ;
  • Kim, Min-Kang (Dept. of Dental Science, Graduate School Chonnam National University) ;
  • Song, Ho-Jun (Dept. of Dental Science, Graduate School Chonnam National University) ;
  • Ha, Kwang (Faculty of Applied Chemical Engineering and The Research Institute for Catalysis) ;
  • Kang, Shin-Young (Faculty of Applied Chemical Engineering and The Research Institute for Catalysis)
  • 박영준 (전남대학교 치의학전문대학원 치과재료학교실 및 치과재료연구소) ;
  • 황문진 (전남대학교 치의학전문대학원 치과재료학교실 및 치과재료연구소) ;
  • 김민강 (전남대학교 치의학전문대학원 치과재료학교실 및 치과재료연구소) ;
  • 송호준 (전남대학교 치의학전문대학원 치과재료학교실 및 치과재료연구소) ;
  • 하광 (전남대학교 공과대학 응용화학공학부 및 촉매연구소) ;
  • 강신영 (전남대학교 공과대학 응용화학공학부 및 촉매연구소)
  • Published : 2008.06.30
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Abstract

This study was purposed to investigate the effects of surfactants and fillers on physical properties of hydrophilic polyvinylsiloxane dental impression materials (PVS). Incorporation of surfactants enhanced the hydrophilicity of the PVS, however, it induced increased viscosity and permanent deformation ratio, delayed setting, and decreased tensile strength. At high concentrations of surfactant, the tensile strength was observed to decrease significantly due to the internal pore formation. Especially, the hydrophilicity of the PVS was significantly enhanced with the addition of Silwet L-77. However, the viscosity, strain in compression, pore formation, and setting time increased whereas the elastic recovery rate and strength remarkably decreased. The PVS dental materials containing Span 20 showed the lowest degree of viscosity increase, delayed setting, pore formation, and hydrophilicity. The delayed setting, pore formation, and strength decrease caused by the incorporation of surfactant were improved by substituting the crystalline quartz filler with diatomaceous earth while the contact angle of PVS dental materials increased.

본 연구는 친수성 폴리비닐실록산 치과용 고무인상재를 개발하기 위해 계면활성제의 종류와 함량 및 필러의 배합비를 다르게 하면서 첨가시켜 물성에 미치는 영향을 연구하였다. 계면활성제를 첨가함으로써 친수성이 향상되었으나 점도와 영구변형률을 증가시키고 경화시간을 지연시켰으며 강도를 감소시켰다. 일정이상의 함량에서는 내부에 기포발생과 심한 강도감소를 초래하였다. 특히 Silwet L-77의 첨가는 점도, 압축시 변형률, 기포발생, 경화시간의 증가와 탄성회복률 및 강도의 감소가 두드러졌으나 함량증가에 따른 친수성 향상은 가장 우수하였다. 함량증가에 따른 점도상승, 경화지연, 기포발생 및 친수성은 Span 20을 첨가한 군이 가장 낮았다. 실리카 필러의 20%를 규조토로 대체함으로써 수분접촉각은 증가하였으나 계면활성제 첨가로 인한 경화지연, 기포발생, 강도저하의 문제를 크게 개선할 수 있었다.

Keywords

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