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From compressibility to structural investigation of sodium dodecyl sulphate — Part 2: A singular behavior under pressure

Chantraine, Florence and Viana, Marylène and Cazalbou, Sophie and Brielles, Nelly and Mondain-Monval, Olivier and Pouget, Christelle and Branlard, Paul and Rubinstenn, Gilles and Chulia, Dominique From compressibility to structural investigation of sodium dodecyl sulphate — Part 2: A singular behavior under pressure. (2007) Powder Technology, vol. 177 (n° 1). pp. 41-50. ISSN 0032-5910

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Official URL: http://dx.doi.org/10.1016/j.powtec.2007.02.031

Abstract

Investigations were carried out to elucidate the compression behavior of a powdered surfactant, sodium dodecyl sulphate (SDS), based on a comparison with the main component of a detergent formulation, i.e. the chorine provider (DCCNa). The energetic analysis based on the compression cycles highlighted a lower compressibility of SDS compared with DCCNa, especially due to its worse packing ability, larger elasticity and bad cohesion ability. Also, it pointed out that the pycnometric density seemed to be overrun under pressure whereas a residual porosity had been evidenced in the expanded tablets. DSC/DTA analysis, Raman spectroscopy as well as powder X-ray diffraction refuted the hypothesis of a physico-chemical transformation of SDS under pressure. This was in accordance with the morphology of the SDS particles, quite unchanged after compression. The pycnometric density measurements have been improved; firstly, it allowed to properly express the compaction ratio of the ejected SDS tablets, and secondly, it led to conclude to a reversible intrinsic compressibility for pressures higher than 50 MPa, explained by the predominant elastic behavior of SDS.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Powder Technology website : http://www.sciencedirect.com/science/journal/00325910
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Eurotab (FRANCE)
Other partners > Université de Limoges - UNILIM (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS
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Deposited By: Celine Cabaup
Deposited On:05 Jun 2009 13:09

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