Seaweed to Skin: Green Chemistry Approaches to Phlorotannin Extraction, Applications in Skin Health, and Educational Engagement

Author: Adele Mastroyannis

Mastroyannis, Adele, 2025 Seaweed to Skin: Green Chemistry Approaches to Phlorotannin Extraction, Applications in Skin Health, and Educational Engagement, Flinders University, College of Science and Engineering

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Abstract

South Australian brown macroalgae species have shown that they are a unique bioresource of skin health ingredients that are untapped, but underexplored. This PhD scoped the entire linear downstream process embedding green chemistry throughout the experimental design. The project began with successfully identifying new seaweed species and obtaining extracts for anti-aging product development. The use of the Vortex Fluidic Device facilitated the development of a novel dermal delivery system made of gold nanoparticles coated with macroalgae bioactives suitable for skin health products. The project also expanded into increasing consumer awareness of green chemistry, targeting a younger audience to explore macroalgae as a sustainable material, now an internationally recognised outreach program. This research provided insight into the potential of using South Australian marine biomass, navigating challenges and outcomes at a green chemistry and industry level, being the first of its kind to measure green chemistry across an entire body of research.

Keywords: Green Chemistry, Algae biotechnology, brown algae, south australia, cosmetic, skin health

Subject: Chemistry thesis

Thesis type: Doctor of Philosophy
Completed: 2025
School: College of Science and Engineering
Supervisor: Prof. Colin Raston