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| Synthesis and Properties of A Novel Amphoteric Betaine Surfactant |
| ZHOU Yang, PAN Zhong-wen, CHEN Geng |
| School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, China |
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Abstract N,N-dimethyl-N′-(acyl-methoxy-propyl)-1,3-propanediamine(2) was prepared by reaction of N,N-dimethyl-1,3-propanediamine with methyl acrylate. A novel amphoteric betaine surfactant(6) was obtained by amino protection， quaterisation and hydrolysis from 2. The structure was characterized by 1H NMR, IR and ESI-MS. The surface properties of 6 were investigated. The results showed that the critical micelle concentration(CMC) was 1.48×10-4 mol·L-1, the surface tension(γCMC) was 39.99 mN·m-1, and the Krafft point was below 0 ℃. Moreover, 6 exhibited good surface activities, excellent emulsifying capacity and forming capacity.
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Received: 15 September 2015
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2016, Vol. 24 
