Synthesis and Surface Properties of Novel Cationic Gemini Surfactants |
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| Authors: | Zhaoyun Ding Aiyou Hao |
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| Institution: | 1. School of Chemical Engineering , Shandong Institute of Light Industry , Jinan, P. R. China zhaoyunding@gmail.com;3. School of Chemistry and Chemical Engineering , Shandong University , Jinan, P. R. China |
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| Abstract: | A series of novel cationic gemini surfactants, p-C n H2n+1N+(CH3)2CH2CH(OH)CH2O]2C6H4·2Cl? A(n = 12), B(n = 14) and C(n = 16)], containing a spacer group with two flexible and hydrophilic groups (2-hydroxy-1,3-propylene) on both sides of a rigid and hydrophobic group (1,4-dioxyphenylene) has been synthesized by the reaction of hydroquinone diglycidyl ether with N,N-dimethylalkylamine and N,N-dimethylalkylamine hydrochloride. Their surface-active properties have been investigated by surface tension measurement. The critical micelle concentration (cmc) values of the synthesized cationic gemini surfactants are one order of magnitude lower than those of their corresponding monomeric surfactants (C n H2n + 1N+(CH3)3·Cl?). Both the cmc and surface tension at the cmc (γcmc) of A are lower than those of p-C12H25N+(CH3)2CH2]2C6H4·2Cl? (D). The novel cationic gemini surfactants A and B also show good foaming properties. |
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| Keywords: | Cationic gemini surfactant foaming property surface-active property |
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