Surface modification of cellulose nanocrystals for controlled distribution and mechanical properties in latex polymer systems

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This proposal seeks to develop high-value latex polymer products using cellulose nanocrystals (CNCs) which are sustainable nanoparticles derived from wood pulp with a strong Canadian presence. Latex polymers are used in a broad range of applications including coatings, adhesives, thin films, paints and rubbers. Specifically, we aim to use CNCs as a nanofiller or crosslinking agent in latex polymers. We hypothesize that the addition of CNCs will modify the microstructural properties of the latex and improve their overall performance.** Our industrial partners, FPInnovations and Celluforce, have played a dominant role in CNC development and are the largest producers of CNCs worldwide. CNCs have many potential applications due to their high mechanical strength, large aspect ratio, non-toxicity and biodegradability; however, the development of commercial products containing CNCs is still in its infancy and many polymer applications have yet to be explored. To fully exploit the reinforcing potential of CNCs, the challenge of uniformly distributing CNCs within a polymer matrix and optimizing interfacial compatibility between components must be overcome. We will functionalize CNCs to control their location and role within latex polymers and fully characterize the physical, chemical and mechanical behaviour of CNC-latex composites. The synergy between Cranston and Dubé's expertise (preparation, modification and characterization of CNCs and environmentally benign polymer reaction engineering, respectively) will allow for rapid development of novel commercial products with many Canadian industrial receptors. This research will ensure that Canada remains at the forefront of scientific discoveries for CNCs. (This proposal is part of an effort to secure funding from the Alberta-Ontario Innovation Program (AOIP), which is a partnership between Alberta Innovates Technology Futures, Ontario Centres of Excellence, governments of Alberta and Ontario, and NSERC. The AOIP supports innovation in different areas, including Nanotechnology, Advanced Materials and Forestry, which are represented in the present application.) ********