서지주요정보
희박 고분자 수용액의 경막흐름에서의 물리흡수 = Physical absorption in the falling film of dilute polymeric aqueous solutions
서명 / 저자 희박 고분자 수용액의 경막흐름에서의 물리흡수 = Physical absorption in the falling film of dilute polymeric aqueous solutions / 이서주.
저자명 이서주 ; Lee, Seo-Ju
발행사항 [서울 : 한국과학기술원, 1982].
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소장정보

등록번호

4101797

소장위치/청구기호

학술문화관(문화관) 보존서고

MCE 8209

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초록정보

Two objectives of this study were to measure the diffusion coefficients for Oxygen in three dilute polymeric aqueous solutions (Sodium carboxymethyl cellulose, Hydroxyethyl cellulose, Poly Vinyl Alcohol) under flow condition, and to investigate the influence of shear rate on diffusivity. The wetted wall column was used for these objectives and the concentration of physically absorbed oxygen was measured using the Winkler titration. The diffusivity of approximately pure Oxygen (minimum purity 99.99%) into distilled water was measured and found to be equal to $1.6×10^{-5}$㎠/sec at 20℃ which is in the range of values reported in literature. It was found that diffusivity is a function of concentration and types of polymer, but the effect of viscosity of solution on diffusivity may not be the dominant one. For Sodium C.M.C., the enhancement of diffusivity was found within the polymer-concentration range used (002-0.1wt%) and diffusivity was largest when the polymer-concentration was 0.1wt%. $D/D_{water}$ = 1.11, Sodium C.M.C. 0.1wt% In the case of H.E.C. solution, the diffusivity ratio varied from 1.0 to 0.87 as the H.E.C. concentration increased from 0.1wt% to 0.3wt%. The diffusivity ratio for P.V.A. solution was always less than 1.0. Taken account of the errors of the experiment, diffusivity was constant with respect to the change of the shear rate at the wall in the studied range of flow rate of solutions.

서지기타정보

서지기타정보
청구기호 {MCE 8209
형태사항 [iii], 80 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 : 1, 실험 data. - 2, 이론식으로부터 확산계수 계산
저자명의 영문표기 : Seo-Ju Lee
지도교수의 한글표기 : 이원국
지도교수의 영문표기 : Won-Kook Lee
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 61-68
주제 Polymer solutions.
확산. --과학기술용어시소러스
고분자 용액. --과학기술용어시소러스
Diffusion.
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