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Charge and size matters — How to formulate organomodified silicones for textile applications

Kumar, Abhijeet and Trambitas, Alexandra and Peggau, Jörg and Dahl, Verena and Venzmer, Joachim and Gambaryan-Roisman, Tatiana and Kleinen, Jochen (2019):
Charge and size matters — How to formulate organomodified silicones for textile applications.
In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, pp. 180 - 188, 560, ISSN 0927-7757, DOI: 10.1016/j.colsurfa.2018.09.080, [Online-Edition: https://doi.org/10.1016/j.colsurfa.2018.09.080],
[Article]

Abstract

Organomodified silicones (OMS), which conventionally find use in textile finishing processes, have recently become a very interesting prospect in the field of fabric softeners. Here, we present OMS-based fabric softener formulations in the form of classical emulsion (droplet size ≈0.1 μm – 10 μm) and microemulsions (droplet size ≈5 nm–50 nm) using nonionic surfactants (NIS) as emulsifier. Streaming potential measurements are used to obtain a measure of droplet surface charge, and it was found to be related to the ratio of masses of OMS and NIS present in the formulations. In this work, it is investigated how the performance of these formulations is influenced by properties such as droplet size and streaming potential. Panel tests were carried out to evaluate the sensory properties of fabric treated by these formulations, and they reveal that the classical emulsion performs better than the microemulsions. For the microemulsions, it is found that softening performance increases with streaming potential. The observed trends in softening performance are explained by considering the difference in location or penetration of softening actives on or into fabric. Two different experimental approaches are implemented to gain insights into the underlying phenomena. In the first approach, batch deposition experiments are carried out to characterize OMS deposition on fabric. In the second approach, a chromatographic technique is used to compare the deposition kinetics of different formulations. The findings of the experiments provide insights into the reasons underlying the contrasting softening performance. The final results are discussed with respect to existing literature.

Item Type: Article
Erschienen: 2019
Creators: Kumar, Abhijeet and Trambitas, Alexandra and Peggau, Jörg and Dahl, Verena and Venzmer, Joachim and Gambaryan-Roisman, Tatiana and Kleinen, Jochen
Title: Charge and size matters — How to formulate organomodified silicones for textile applications
Language: German
Abstract:

Organomodified silicones (OMS), which conventionally find use in textile finishing processes, have recently become a very interesting prospect in the field of fabric softeners. Here, we present OMS-based fabric softener formulations in the form of classical emulsion (droplet size ≈0.1 μm – 10 μm) and microemulsions (droplet size ≈5 nm–50 nm) using nonionic surfactants (NIS) as emulsifier. Streaming potential measurements are used to obtain a measure of droplet surface charge, and it was found to be related to the ratio of masses of OMS and NIS present in the formulations. In this work, it is investigated how the performance of these formulations is influenced by properties such as droplet size and streaming potential. Panel tests were carried out to evaluate the sensory properties of fabric treated by these formulations, and they reveal that the classical emulsion performs better than the microemulsions. For the microemulsions, it is found that softening performance increases with streaming potential. The observed trends in softening performance are explained by considering the difference in location or penetration of softening actives on or into fabric. Two different experimental approaches are implemented to gain insights into the underlying phenomena. In the first approach, batch deposition experiments are carried out to characterize OMS deposition on fabric. In the second approach, a chromatographic technique is used to compare the deposition kinetics of different formulations. The findings of the experiments provide insights into the reasons underlying the contrasting softening performance. The final results are discussed with respect to existing literature.

Journal or Publication Title: Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume: 560
Uncontrolled Keywords: Fabric softener, Organomodified silicones, Silicone quats, Deposition, Streaming potential, Formulation
Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Institute for Technical Thermodynamics (TTD)
Profile Areas
Profile Areas > Thermo-Fluids & Interfaces
Date Deposited: 02 Nov 2018 16:25
DOI: 10.1016/j.colsurfa.2018.09.080
Official URL: https://doi.org/10.1016/j.colsurfa.2018.09.080
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