Synthesis and Characterization of Silicone Modified Polyurethane Surfactant Useable at High Temperature |
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| Authors: | Xiaohui Chen Pei Xu Pan Xue Ali Bahader Yunsheng Ding |
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| Affiliation: | 1. School of Chemical Engineering , Hefei University of Technology , Hefei , P.R. China;2. School of Chemical Engineering , Hefei University of Technology , Hefei , P.R. China;3. Key Laboratory of Advanced Functional Materials and Devices , Anhui Province , Hefei , P.R. China |
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| Abstract: | A series of novel silicone modified polyurethane (Si-PU) surfactants were successfully synthesized by using hydroxypropyl-terminated polydimethylsiloxane (HPMS), polyethylene glycol (PEG), dimethylolpropionic acid (DMPA) and isophoronediisocyanate (IPDI). The chemical structure of the surfactant was confirmed by FTIR and 1H-NMR. TEM photographs showed that the micelles of the Si-PU surfactants dispersed in aqueous solution were spherical with the particle size in the range of 100–400 nm. Surface tension measurements indicated that these surfactants had low surface tension to 29.9 mN·m?1and a definite critical micelle concentration to, approximately 5.0×10?4–7.5×10?4mol·L?1. When the content of HPMS was 20 wt%, the surfactant's, emulsifying performance was superior to the traditionally available Span80/Tween80 mixed emulsifiers. In addition to that, no phase transition temperature was detected from 20°C to 90°C by fluorescence probe and DSC measurements, confirming the high thermal stability of the micelles. |
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| Keywords: | Thermally stable polyurethane surfactants silicone critical micelle concentration emulsifier |
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