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Changes in the Properties of Precipitated Silica Depending on the Modification Process of Silica Hydrogel Originated from Rice Husk

왕겨 유래 실리카 하이드로겔의 개질처리에 의한 침강실리카 특성 변화

Dong-Seop Kim1
,
Yong Joo Sung2†
김동섭 1
,
성용주 2†
1Department of Biobased Materials, College of Agriculture and Life Science, Chungnam National University
2Department of Biobased Materials, College of Agriculture and Life Science, Chungnam National University
1충남대학교 농업생명과학대학 환경소재공학과, 연구원
2충남대학교 농업생명과학대학 환경소재공학과, 교수
†Corresponding author: E-Mail: yosung17@cnu.ac.kr (Address: Department of Biobased Materials, College of Agriculture and Life Science, Chungnam National University, Daejeon, 34134, Republic of Korea)
28 February 2022. pp. 54-64
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Abstract

In this study, the changes in the properties of the prepared precipitated silica were evaluated depending on the conditions of the modification process of the silica hydrogel originated from rice husks. Rice husk silica hydrogel was prepared through a sol-gelation process after alkali soaking extraction of rice husk. The silica hydrogel was modified by adjusting the solution concentration and temperature conditions in acidic and alkali solutions. As a result, the changes in surface chemical properties and the improvement of quality characteristics such as whiteness and impurity removal were confirmed through the modification process. The modification treatment in an acidic atmosphere minimized the decrease in production yield and showed great effects on the whiteness and the removal of impurities such as alkali metals. In a alkaline condition, the improvement in the whiteness was clearly shown, but the reduction in yield increased. It was shown that the effects of the residual alkali metals and the organic substances on the properties of the precipitated silica could be controlled by the control of the modification process conditions.

Keywords
Sol-gel
rice husk
precipitated silica
modification
silica hydrogel
References

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Information
  • Publisher :Korea Technical Association of The Pulp and Paper Industry
  • Publisher(Ko) :한국펄프종이공학회
  • Journal Title :Journal of Korea TAPPI
  • Journal Title(Ko) :펄프종이기술
  • Volume : 54
  • No :1
  • Pages :54-64
  • Received Date : 2022-02-09
  • Revised Date : 2022-02-15
  • Accepted Date : 2022-02-19
  • DOI :https://doi.org/10.7584/JKTAPPI.2022.2.54.1.54
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