| Cleavable surfactants are capable of splitting into non-surface-active species when subjected to certain conditions depending upon their structures, such as weakly acidic, basic and light. The cleavable bonds make them environmental safety, and new functionality of the cleaved products will be favored. In addition, the presence of a surfactant after completion of its application can lead to certain problems like the formation of persistent emulsions or foaming. Cleavable surfactants present the potential solution for elimination of these problems. Therefore, its development and characteristic research aroused widespread attention at home and broad. The thesis focused on the synthesis of series new cleavable surfactants. Meanwhile, the surface activity and application properties were studied; furthermore its cleavable has been investigated tentatively.Four dichloro-intermediates ( 2-aliphaticamino-4,6-dichloro-1,3,5–triazine, shortened by CT )were synthesized from cyanuric chloride and aliphatic amine. Then the series of cleavable aryl sulfonate anionic surfactants ( 2-aliphaticamino-(8-naphthol-3,6- disulfonic acid mono sodium) amino–6–chloro-1, 3, 5–triazine, shortened by ACT) were prepared from the intermediates and H acid mono sodium salt. Their structures were identified by 1H-NMR,Infrared Spectrum (IR) and Elementary Analysis (EA).The surface active test result showed that: with the increasing length of carbon chain, the value of their CMCs and surface tensions under CMC (γCMC) initially decreased and then reached a minimum (respectively 1.5×10-5 mol·L-1 and 28.29 mN·m-1) when the carbon numbers was 10. The CMC andγCMC then increased when the carbon number was increased to 12. Such surfactants have much lower surface adsorption amounts and greater molecular areas on the aqueous surface because of their particular structures.Meanwhile, the properties for application of the ACT and SDBS were also investigated. The results suggested that: the wetting ability are C12-ACT |
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