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Polysiloxanes with Quaternary Ammonium and Polyether Groups for Silyl-Terminated Polypropylene Oxide Waterborne Emulsions

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Journal of Surfactants and Detergents

Abstract

In this paper, polysiloxanes with pendant quaternary ammonium and polyether segments (EQAPS, nonionic–cationic silicone surfactant) were synthesized through hydrosilylation of poly(dimethylhydro)siloxane with allyl poly(ethylene glycol) acetic ester (M n  = 540) and allyl glycidyl ether, followed by a ring-opening reaction of epoxide groups with diethyl amine and quaternization with benzyl chloride. The chemical structures of EQAPS and intermediate products were characterized by 1H-NMR and FT-IR spectra. The surface activity and thermal properties of EQAPS were studied with surface tension measurement and differential scanning calorimetry analysis, respectively. The results showed that the EQAPS had a much smaller critical micelle concentration value (118 mg/L) and lower glass-transition temperature (T g: −57 °C). The silyl-terminated polypropylene oxide waterborne emulsions, which were substantially free from organic solvent, were prepared via a phase-inversion emulsification technique using EQAPS as single emulsifier and/or poly(ethylene glycol) (\(\bar{M}\) n  = 400) as cosolvent. The electrical properties of the system indicated that the phase inversion was completely accomplished. The viscosity of the emulsions with different solid contents was measured, and the results showed that the most suitable solid content was about 50 wt%. The emulsions with smaller particle size (12 μm) had better storage stability (48 days at 50 °C) and freeze–thaw stability.

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Acknowledgments

This work was supported by the Shandong Provincial Natural Science Foundation, China (No. ZR2013EMM004) and Jinan City University and Institutes Independent Innovation Planning Project, China (No. 201402044).

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Authors and Affiliations

  1. College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Shandong Normal University, Jinan, 250014, People’s Republic of China

    Zhaosheng Hou, Bing Yang & Zhen Xu

  2. Shandong Institute for Food and Drug Control, Jinan, 250101, People’s Republic of China

    Dongmei Zhang

  3. Department of Chemical Engineering, Tsinghua University, Beijing, 10084, People’s Republic of China

    Chengyou Kan

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  1. Zhaosheng Hou
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  2. Bing Yang
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  3. Dongmei Zhang
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  4. Zhen Xu
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  5. Chengyou Kan
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Correspondence to Zhaosheng Hou.

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Hou, Z., Yang, B., Zhang, D. et al. Polysiloxanes with Quaternary Ammonium and Polyether Groups for Silyl-Terminated Polypropylene Oxide Waterborne Emulsions. J Surfact Deterg 19, 739–745 (2016). https://doi.org/10.1007/s11743-016-1825-8

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  • DOI: https://doi.org/10.1007/s11743-016-1825-8

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