Synthesis and characterization of branched polyglycerol surfactants
Typ
Examensarbete för masterexamen
Master's Thesis
Master's Thesis
Program
Materials chemistry (MPMCN), MSc
Publicerad
2024
Författare
Moilanen, Eric
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
Polyglycerol surfactants have emerged as a promising renewable alternative to fossil
based polyethylene glycol surfactants. The polyglycerol head group offers greater
structural variability and possibility for functionalization. In order to facilitate
the transition to renewable nonionic surfactants, a deeper understanding of the
structure-property relationship, particularly regarding branching, is essential. To
this end, two polyglycerol structures with different degrees of branching were synthesised
through a series of chemical reactions. These structures were then esterified
with carboxylate tails of varying lengths and analyzed by tensiometry, interfacial
rheology and quartz crystal microbalance with dissipation monitoring. The results
indicated that enlargement of the branched head group significantly influences the
surfactants self-assembly and the air-water interfacial rheology. QCM-D analysis
showed that the branched head group binds very strongly to hydrophilic surfaces,
likely due to its hydroxylated nature.