Imperial College London


Faculty of EngineeringDepartment of Materials

Research Postgraduate







ACE ExtensionSouth Kensington Campus





Surfactant systems are universally present in modern day life. They are involved in many global industrial sectors including in the formulation of personal care products and detergents. Understanding their phase behaviour is central to engineering and formulating final products that are highly efficient, economically viable, environmentally stable, and meet customer satisfaction. 

  • NaLAS surfactant - the most widely used surfactant globally - as a model system as it is the prime surfactant involved for its detergency
  • A model mixed surfactant system of NaLAS and AE1S surfactants - commonly used in laundry detergents

Perfume is an integral component of many home and personal care goods and are central to a customer’s satisfaction. Typically, in such formulations most of the perfume is lost and never utilised. In the case of laundry detergents, the perfume is held within a surfactant system that is washed away during rinse cycles without ever being deposited on fabric. This has driven an interest to design and improve compositions where the impact of the perfume is prolonged and its usage economised especially as it is one of the most expensive pars of the formulation. In this project, we will examine a polymer perfume delivery system comprised of perfume, a hydrophobically modified OSA starch polymer, and a HASE polymer. We will see how the dissolution kinetics of the perfume delivery system is affected by polymer and surfactant concentration.