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CHAPTER 12

An Overview of the Potential Applications of TiO2 Photocatalysis for Food Packaging, Medical Implants, and Chemical Compound Delivery

This chapter present three potential applications related to safety and health: food packaging; osseointegration and disinfection of medical implants; and controlled delivery of chemical compounds. Regarding food packaging, the favourable effects of TiO2 incorporation in polymer films on microorganism inactivation, and decreases in oxygen and ripening-promoting ethene concentrations, have been demonstrated. The main barrier to implementation seems to be the concern about the possible release of TiO2 particles. Titanium, a common component of medical implants, is readily covered by layers of Ti oxides, including TiO2 which can additionally be deposited. These oxides improve osseointegration, which is increased by pre-UV-irradiation. Furthermore, successful preoperative disinfection of the implants via UV-irradiation, taking advantage of bacteria inactivation and biofilm adhesion due to photo-excited TiO2, is of high interest because prevention of bacterial infections is obviously a major issue. Photo-excited TiO2 could be used for controlled delivery of chemical compounds (e.g., drugs, personal care products, insecticides, etc.) that can be either directly attached to TiO2 via a coupling agent designed to be broken on UV-irradiation or contained in microcapsules made of polymers easily degradable by photocatalysis. However, this application is still at the research stage because of many remaining issues.

Print publication date: 04 Apr 2016
Copyright year: 2016
Print ISBN: 978-1-78262-709-8
PDF eISBN: 978-1-78262-710-4
ePub eISBN: 978-1-78262-798-2
From the book series:
Energy and Environment Series