Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Preparation and Interface Properties of Colloidal Silica

콜로이드 실리카의 제조 및 계면특성

  • Lee, Han Chul (Department of Chemical Engineering, Inha University) ;
  • Kim, Jong Hyub (Department of Chemical Engineering, Inha University) ;
  • Chang, Yoon Ho (Department of Chemical Engineering, Inha University)
  • 이한철 (인하대학교 화학공학과) ;
  • 김종협 (인하대학교 화학공학과) ;
  • 장윤호 (인하대학교 화학공학과)
  • Received : 2006.05.09
  • Accepted : 2006.06.07
  • Published : 2006.08.10
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Abstract

Colloidal silica which has high surface area and excellent surface properties are chemically stable inorganic materials and used for various applications in industry. Silica sol was prepared from sodium silicate solution by acid neutralization method and ion exchange treatment to remove sodium ions. Through the experimental analysis for controlling factors of particle growth rate, such as temperature, pH, and aging time, the uniform size distribution of silica sol could be obtained. The size distribution and shape of silica sol was measured by TEM and dynamic light scattering method. Zeta potential change and gelling phenomena of silica sol and its rheological properties also investigated.

콜로이드형 실리카는 화학적으로 안정한 무기소재로 비표면적과 표면물성이 우수하여 산업적으로 다양한 용도로 사용하고 있다. 본 연구에서는 sodium silicate로부터 이온교환방법 및 산-중화법을 이용하여 colloidal silica를 제조하고 입자성장인자인 온도, pH, 농도와 aging time을 조절하여 크기를 조정하는 방법을 조사하여 균일한 크기분포를 가진 colloidal silica를 제조하였다. 실리카 졸의 크기와 모양은 TEM 및 dynamic scattering method를 이용하여 측정하였다. 또한 콜로이드의 입자크기에 따른 제타 전위값의 변화, 겔화현상과 그 유변학적 특성을 연구하였다.

Keywords

Acknowledgement

Supported by : 인하대학교

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