Development of a Novel Smart Window Technology Based on Nanocellulose Crystals

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In recent years, bio-innovative nanocellulose based solutions leading to formation of smart windows for energy efficiency and sustainability have drawn significant interest among researchers. Several strategies for incorporating energy-efficiency requirements into building standards have been implemented by provincial governments in Canada. All Weather Window (AWW) is Canada's largest fully integrated manufacturer and supplier of glass/plastic windows and doors. Currently, a major challenge facing AWW is the introduction of an environment-friendly bio-innovative nanocellulose based solution into manufacturing of smart windows for better energy efficiency and sustainability. AWW is interested in carrying out scientific research in establishing smart nanocellulose material technology that would replace regular glass windows in residential/commercial buildings. This proposed smart window is expected to function as an electric dimming glass such that it can block UV light, and provide controlled privacy. Presently, curtains and blinds are used to either completely or partially block sunlight; eliminating such elements is of utmost importance as blocking UV prevents sun light illumination, health (e.g. dust and germ collection especially in hospitals), cost, maintenance, and disposal/recycling issues. For the consumer it is challenging and sometimes even impossible to conserve the curtains or blinds, thus they gather dust and become impossible to clean, providing a suitable habitat and food for dust mites. The research indicates introduction of nanocellulose fiber membrane between glass/plastic panes and by applying a voltage, the panels behave as a variable dimming glass. Since the nanocellulose film is conductive in nature, it can be controlled to allow UV light to pass through and also block under biased and unbiased conditions, respectively. In this context, AWW, in collaboration with UofA, is planning to initiate a research project to develop a novel smart window based on nano-materials with the objective of evaluating performance to control light transmission.