This research aimed to investigate the optimisation of hybrid CO2-philic surfactant chemical structure in stabilising water-in-Oo- (w/c) microemulsions. The optimisation was carried out by synthesise anionic surfactants analogue of AerosolOT(sodium bis (2-ethylhexyl) sulfosuccinate) template with the modification on hydrocarbon CO2-philic chain type and surfactant headgroup. Proton Nuclear Magnetic Resonance eH NMR) spectroscopy and CHNS-O elemental analysis were used to characterize the chemical structure and purity of the surfactants. The performances of surfactant were investigated through high-pressure phase behaviour, surface tension measurement, and UV-Visible spectroscopy. Research finding showed that fluorination on hybrid AOT analogue surfactant structure is the key factor affecting the CO2-philicity of the surfactant. The CO2-philicity of hybrid AOT analogue surfactants enhanced by utilising highly methylated branched hydrocarbon tail hence reduces the interfacial tension bet.....

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This  research  aimed  to  modify  and  examine  the  role  of  new  graphene-compatible surfactants  and  the  mechanism  in  the  stabilisation  of  graphene  incorporated  into  biopolymer   matrix   namely   natural   rubber   latex   (NRL)   and   cellulose   for   the  preparation   of   conductive   nanocomposites.   The   surfactants   were   systematically  designed and synthesised to have enhanced compatibility with graphene as compared to  commercially   available  common  surfactants.  The  modifications  are  centred  on variation  of  surfactant   chain  degree  as  well  as  aromatic  numbers  on  surfactant  tail, aromatisation on surfactant  headgroup,  ion exchange of hydrophilic headgroup,  and metal  incorporation  on  surfactant   headgroup.  The  graphene-compatible  surfactants have  been  investigated  by a  range  of   techniques  including  proton  nu.....

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