Nano Particles in Plastics

[Louis]

Most of us know that Nano particles are used in many everyday items such as make up, lotions, and medical plastics to name but a few, and that they have proved beneficial. However, their use has spurred much controversy and the battle lines are being drawn with the chemical companies on one side and the big pharmaceuticals on the other side.

Several countries cite medical studies showing that nano particles are as dangerous as asbestos, while others claim otherwise.

My thoughts are that eating a dish of nano particle eggs should not be a problem, thought it might take awhile. On the other hand, inhaling any particle small enough to become trapped in the lungs might cause harm.

Much of their use in plastics is shrouded in secrecy as manufacturers try to get a leg up on competitors, but can anyone here shed light on their safe use based on real world experience?

[Dr. Dick]

Louis,
My undergraduate Alma mater Washington University in St. Louis has a program on Nano particle safety see

http://news.wustl.edu/news/Pages/15252.aspx

[Paja]

I know just about some research regarding carbon nanotubes and their toxicity.

http://basf.com/group/corporate/de/func ... f_BASF.pdf

My opinion is that broad usage of nanoparticles in almost everything is really dangerous game. Nanoparticles have many advantages but are there some hidden risks? Who knows.

Pavel

[Len]

My first thought is that the nano particle must enter the lung to become a health problem. Therefore, personal protective equipment (PPE) and measures to eliminate air borne particles would be strongly advised. One problem might be that these particles are so small that conventional respirators are ineffective! This caution might extend to dust collector systems, as well.

Also, are there abrasive situations where nano particles can be freed from the polymer composite matrix and thus cause a problem wherein uses are exposed?

Len