Publication Date

Spring 2026

Degree Type

Thesis

Degree Name

Master of Science (MS)

Department

Chemical and Materials Engineering

Advisor

Christopher Lew; Katy Kao; Yanika Schneider

Abstract

This study focuses on the development of sodium alginate, a seaweed-derived biopolymer, as a sustainable alternative to conventional food packaging films. The alginate is extracted from natural brown seaweed with a yield of 31% and is formed into alginate films by the solution casting method. This study discusses the alginate extraction and film formation techniques as well as the conditions that affect film properties. Additionally, it explores using composite formulations to enhance alginate properties through additives such as glycerol and silica. Glycerol, tested at different concentrations (15, 25, and 50 wt.%), works as a plasticizer to enhance the flexibility of alginate films. Inorganic filler, silica, as a second additive tested at low concentrations (1-3 wt.%) to improve the strength and thermal stability of the material. The goal of this study is to determine the effect of different formulations on the thermal and mechanical properties of alginate films. The overall objective of this project is to produce a good alternative for food packaging to improve human life and the natural environment.

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