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Characteristics of Pores as Measured by Porosimetry and Microscopy Considering Spaghetti as a Model System

  • Mohammad Shafiur Rahman , Abdullah Al-Mamun EMAIL logo and Issa S. Al-Amri
Published/Copyright: May 6, 2017

Abstract

Open pore porosity of spaghetti was measured by helium (He) gas pycnometer and mercury (Hg) porosimetry and it was observed as 0.025 and 0.023, respectively. Pore size distribution curve from mercury porosimetry indicated two sharp crests, at alternate position of 59±8 μm and 6.4±0.9 μm diameter pore; while Scanning Electron Microscopy (SEM) showed two types of pores, first class was cracks and second one was holes. The average width of the cracks (channel) and diameters of holes were determined as 3.6±1.5 µm and 1.0±0.3, respectively. The moisture sorption isotherm of spaghetti was measured by dynamic sorption method and modeled by Brunauer-Emmett-Teller (BET) and Guggenheim-Anderson-de Boer (GAM) models. The values of BET monomolecular layer were observed as 3.24 and 5.91 kg water/kg dry solids, respectively for adsorption and desorption cycles.

Funding source: Sultan Qaboos University

Award Identifier / Grant number: SR/AGR/PLANT/01/01

Funding statement: The project was supported by the Sultan Qaboos University. The autosorp and MDSC were purchased from the His Majesty’s Research Trust Fund (SR/AGR/PLANT/01/01), Sultanate of Oman.

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Published Online: 2017-5-6

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