Masters Theses
Abstract
"The effects of altering particle characteristics via addition of groups to the activated sites of porous silica on its pore size distribution were studied. For this study, three types of porous silica particles- (i) native silica, (ii) silanized silica, and (iii) C-18 silanized silica-were characterized using gas sorption. The native and silanized porous silica samples were composed of mono-dispersed spheres with particle diameters of less than 3.5 µm. The C-18 silanized silica sample was also monodispersed with a particle diameter of less than 1.8 µm.
The samples were analyzed using nitrogen sorption and mercury porosimetry with an Autosorb 1-C® gas sorption apparatus and Poremaster® mercury porosimeter, developed by Quantachrome Corporation at Boynton Beach, Florida. Each instrument used a data acquisition/analysis computer software (Autosorb 1 for Windows (version 1.19) for the Autosorb 1-C® and Poremaster for Windows (version 1. 07) for the Poremaster®, respectively) developed by Quantachrome Corp. This setup was used to generate BJH pore size distributions and perform a micropore analysis using the Saito-Faley method for the gas sorption data as well as a porosimetry analysis.
The experimental results indicated that addition of groups to the activated sites of porous silica alters the pore size distributions of the particles. It was found that as the size of the attached groups increased, the pore size distribution tended to shift towards smaller pore diameters. Noticeable differences were observed between the pore size distributions derived from the adsorption and desorption branches of the isotherm, thus indicating that both these processes occur via different mechanisms"--Abstract, page iii.
Advisor(s)
Ludlow, Douglas K.
Committee Member(s)
Liapis, Athanasios I.
Dorff, Michael
Department(s)
Chemical and Biochemical Engineering
Degree Name
M.S. in Chemical Engineering
Publisher
University of Missouri--Rolla
Publication Date
Summer 2000
Pagination
ix, 86 pages
Note about bibliography
Includes bibliographical references (pages 83-85).
Rights
© 2000 Siddhartha Nahar, All rights reserved.
Document Type
Thesis - Restricted Access
File Type
text
Language
English
Subject Headings
Silica -- AnalysisSilica -- SurfacesPorosity
Thesis Number
T 7828
Print OCLC #
45892383
Electronic OCLC #
922550185
Recommended Citation
Nahar, Siddhartha, "Characterization of silica particles using experimental methods" (2000). Masters Theses. 1975.
https://scholarsmine.mst.edu/masters_theses/1975
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