Improving the flame resistance of lyocell fibres using nanoparticles

Worldwide demand for man-made cellulosic fibres is increasing as availability of cotton fibre is limited. The regenerated cellulose lyocell process offers large advantages over other processes in terms of environmental and social impacts. However, cellulose is flammable. Current strategies to prepare flame-resistant (FR) regenerated cellulose fibre involve the incorporation of a fine powder of organophosphate or silica additives in the fibre or the use of phosphorylated cellulose pulp. Unfortunately, it reduces the strength of the fibre when used at a high enough ratio to achieve the level of flame resistance required for application for FR workwear and personal protective equipment (PPE).

As an alternative solution, this project aims to explore the use of nanoparticles to render lyocell fibres FR while preserving their strength as well as their biodegradability. The work will include the synthesis of the FR nanoparticles and their incorporation into the cellulose dope to prepare FR lyocell fibres. Ultimately, this research will allow the development of made-in-Canada FR and environmentally-friendly lyocell fibres using local sources of cellulose such as hemp and recycled textiles. It will provide a local source of FR fibre for the Canadian FR workwear and PPE industry, insuring a more stable and traceable supply chain.

Faculty Supervisor:

Patricia Dolez

Student:

Partner:

École Supérieure des Industries du Textile et de l'Habillement

Discipline:

Engineering

Sector:

Advanced Manufacturing; Nanotechnology; Sustainability and the Environment

University:

University of Alberta

Program: