Competitive adsorption of a polydisperse polymer during emulsification: Experiments and modeling

Nilsson, LarsLund University,Lunds universitet,Livsmedelsteknik,Avdelningen för livsmedel och läkemedel,Institutionen för processteknik och tillämpad biovetenskap,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Food Technology, Engineering and Nutrition,Division of Food and Pharma,Department of Process and Life Science Engineering,Departments at LTH,Faculty of Engineering, LTH (author)

In this paper we study the selective adsorption of a high molar mass polymer, OSA-starch, at the cyclohexane/water interface during emulsification. This was made possible through the use of AsFlFFF-MALS-RI which enables us to characterize the size and molar mass of polydisperse ultrahigh molar mass polymers. The results show that the high molar mass components in the molar mass distribution of the polymer were selectively adsorbed. The selective adsorption is most likely due to convective mass transport in the turbulent flow fields, during formation of the emulsion, which favors transport to the interface of the high molar mass polymers in the sample. The rapid adsorption that occurs during emulsification is likely to give rise to nonequilibrium effects and jamming at the interface. Furthermore, we describe the adsorption process and illustrate its selective nature through a turbulent flow collision model.

Leeman, MatsLund University,Lunds universitet,Centrum för analys och syntes,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Centre for Analysis and Synthesis,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)tak-msa (author)
Wahlund, Karl-GustavLund University,Lunds universitet,Centrum för analys och syntes,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Centre for Analysis and Synthesis,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)tak-kgw (author)
Bergenståhl, BjörnLund University,Lunds universitet,Livsmedelsteknik,Avdelningen för livsmedel och läkemedel,Institutionen för processteknik och tillämpad biovetenskap,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Food Technology, Engineering and Nutrition,Division of Food and Pharma,Department of Process and Life Science Engineering,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)livt-bbe (author)
LivsmedelsteknikAvdelningen för livsmedel och läkemedel (creator_code:org_t)

In:Langmuir: American Chemical Society (ACS)23:5, s. 2346-23510743-74631520-5827

By the author/editor: Nilsson, Lars; Leeman, Mats; Wahlund, Karl-Gu ...; Bergenståhl, Bjö ...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Other Engineerin ...; and Food Engineering

NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...; and Analytical Chemi ...

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