Function and performance of silicone copolymer (VI). Synthesis and novel solution behavior of water-soluble polysiloxanes with different hydrophiles |
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Authors: | P-L Kuo S-S Hou C-K Teng W-J Liang |
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Institution: | (1) Department of Chemical Engineering National Cheng Kung University Tainan, 70101 Taiwan, TW |
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Abstract: | Silicone surfactants containing different pendant hydrophilic groups such as diethanol tertiary amine (SHE, nonionic), diethanol
methyl quaternary amine (cationic) and triethyl quaternary amine (cationic) have been synthesized and characterized by 1H and 13C NMR and gel permeation chromatography. The solution behavior of these novel surfactants has also been investigated by surface
tension measurement and a fluorescence method. It has been observed that the surface tension of these surfactants decreases
as a function of time at a very low polymer concentration (1 × 10−4 wt%). At higher concentration (0.1 wt%), the equilibrium surface tensions reached very low values compared to that of typical
polymer surfactants, for example, poly(ethylene oxide–propylene oxide) block copolymer (EPE0.8). In addition, the low I
1/I
3 values of these silicone surfactants indicate the formation of polymer aggregates in aqueous solution, and an extremely low
I
1/I
3 value of SHE (1.06) compared to other polymeric surfactants (EPE0.8) and conventional surfactants poly(ethylene glycol n-nonyl phenyl ethers), cetyltrimethylammonium bromide, and sodium dodecyl sulfate] indicates its stronger hydrophobicity.
Received: 15 May 2000 Accepted: 18 October 2000 |
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Keywords: | Silicone surfactant Synthesize Surface tension Fluorescence Polymer aggregates |
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