Sustainable Antimicrobial Polymers Degussa

However, it is not shown to have any biocidal activity and the mode of action is imclear. Presumably, if the plastic is soiled the active cannot provide any protection away from the immediate plastic surface. The impact and cost of the BPD is also vague but these products have yet to make a real impact as they have only been commercialised since 2002. 

Membrane filter test results of PVC samples containing among others Silver Zeolite (4 phr) at extrusion times of 

The use of Ti02 nanoparticles for a self-elean and disinfection of a wide range of substrates as well as plastics has been proposed. 

Such coatings have a proposed meehanism by which titanium dioxide reacts with light to produce a photocatalytie effect by creation of free radicals. These then inactivate mieroorganisms by induction of surface oxidation of the bacterial eell wall. 

The work earried out on this phenomenon such as Niegisch and co-workers (a.23) shows an improved kill rate of baeteria on a surfaee when using Ti02 coatings compared to non-eoated surfaees following exposure to short periods of UV light. 

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Sustainable antimicrobial (SAM) polymers (Figure 48) are relatively new development products from Degussa (tradename Amina T 100) with confident claims of being environmentally sustainable and continuously effective. Amina T 100 is apolymeric active substance with a high level of activity and a low degree of toxicity. It is promoted in the literature as an effective bacteriastat, fungisat and algistat. 

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