서지주요정보
Hematite(α-$Fe_2O_3$) 입자의 정전기적 분산 안정성과 poly(ethylene oxide) 흡착에 의한 입체 효과적 안정성에 관한 연구 = A study on electrostatic dispersion stability and steric stability due to poly(ethylene oxide) adsorption on hematite(α-$Fe_2O_3$) particles
서명 / 저자 Hematite(α-$Fe_2O_3$) 입자의 정전기적 분산 안정성과 poly(ethylene oxide) 흡착에 의한 입체 효과적 안정성에 관한 연구 = A study on electrostatic dispersion stability and steric stability due to poly(ethylene oxide) adsorption on hematite(α-$Fe_2O_3$) particles / 조용균.
저자명 조용균 ; Cho, Yong-Gyun
발행사항 [대전 : 한국과학기술원, 1990].
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소장정보

등록번호

8000931

소장위치/청구기호

학술문화관(문화관) 보존서고

MCE 9028

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

Hematite ($\alpha-Fe_2O_3$) was prepared using Matijevic' method. The range of particle axial ratio was between 1 and 6 and the particle size distribution was monodisperse. The particle with axial ratio of 3 showed more stable dispersion than the particles of axial ratio 1,6 when the stability was governed by electrostatics. $SO_4^{2-}$ ion had more effects on the depression of electrical double layer than $Cl^-$ ion. The adsorbed amount of poly (ethylene oxide) (PEO) on Hematite particle increased as the particle axial ratio became largr and PEO molecular weight became higher. The amount near isoelectric point was larger than that above or below this point. For the particles adsorbed with polymers, the particle having the axial ratio 1 was more stable than that of axial ratio about 3 when $CaCl_2$ or $Na_2SO_4$ was added. The stability was fairly increased when PEO was adsorbed. The Critical flocculation concentration of $CaCl_2$ was higher than that of $Na_2SO_4$ because the power of $SO_4\,^{2-}$ ion that could decrease the solvency of PEO into water was stronger than that of $Cl^-$ ion. The mechanism of polymer adsorption could be influenced by the particle geometric shape and could be a governing factor for the stability of PEO adsorbed particle.

서지기타정보

서지기타정보
청구기호 {MCE 9028
형태사항 viii, 64 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Yong-Gyun Cho
지도교수의 한글표기 : 정인재
지도교수의 영문표기 : In-Jae Chung
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 63-64
주제 Hematite.
흡착. --과학기술용어시소러스
정전기. --과학기술용어시소러스
Adsorption.
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