FEATURE
1. What is the benefit of using nanomaterials?
Two main types we are involved in:
a. Nano-crystalline titanium dioxide exhibits good opacity to UV-light across a wide spectrum of near-visible light. This means it can be used in applications requiring sun protection. Especially good for long-term applications (PVC in exterior applications, Wood-polymer composites) or where safety, non-toxicity is important (sun-care products, food packaging).
b. Photoactivity and other catalytic effects. Raw TiO2 is a powerful photoactive catalyst, reducing the crystals to nano-particles greatly increases their efficacy. Addition to specially formulated paints and other applications can give self-cleaning properties. There is a lot of work on using TiO2 in solar-cells.
2. What are generally seen as the most promising nanomaterials for your market?
Titanium dioxide for self-cleaning applications and photovoltaics
3. What factors do you envisage that will allow for the transition from concept to product?
We can already demonstrate self-cleaning products in action and have joint development programmes for photovoltaics. Main problem with former is additional costs to construction industry have not been proven to give longterm cost benefits regarding leaning costs, we are looking for legislation for new build where anti-pollutant materials such as catalytic TiO2 are specified. For photovoltaics getting efficiency of systems up to 20%+ is key at present only 10%, projected 30%.
4. Why applications are anticipated?
Self-cleaning paint is available now. Self-cleaning concrete and ceramics are available at a high cost. Photovoltaics possibly 2-3 years.
Sandy Gunn
Kemira
Interview by nanoposts.com
