Cellulose for high-performance derivatives

Project description

Cellulose is an excellent feedstock for many types of materials. However, unmodified cellulose is not suitable for all technical applications due to its chemical structure. For example, cellulose is hydrophilic, yet insoluble in water, and is thus not applicable when a hydrophobic or water-soluble polymer is needed. To overcome these limitations, cellulose can be chemically derivatized via its many alcohol groups creating endless areas of application. Coupling novel substituents to cellulose can fundamentally change the properties of native cellulose, and furthermore, allow for regeneration.

Cellulose derivatives are based on renewable and biodegradable resources and represent a sustainable and environmentally friendly alternative to synthetic polymers. However, due to the cellulose's crystalline structure, poor, uneven reactivity and processing can make these problems worse, i.e., hornification. Unsatisfying pulp purity, such as the presence of hemicelluloses, also affects cellulose reactivity and the production of high-quality cellulose derivatives are therefore costly. In this project, novel concepts to increase cellulose reactivity and accessibility using methods based on swelling, enzymatic treatment, and prevention of hornification will be tested, combined and further developed.

Financing

Knut and Alice Wallenberg foundation

Collaborators

Monica Ek, KTH

Gunnar Henriksson, KTH