Biodegradable polymers
e.g. Polylactic acid, use for encapsulation the hemoglobin.
-The Nano capsules can be 80 to 180 nanometers diameter
-Degrade into lactic acid and glycolic acid, which are normal human metabolites
-Can contain hemoglobin high to 15 g/dl.
All biodegradable polymers should be stable and durable enough for use in their particular application, but upon disposal they should easily break down.
PROS
1. non-toxic,
2. capable of maintaining good mechanical integrity until degraded, and
3. capable of controlled rates of degradation.
CONS
1. Through physical decomposition through reactions such as hydrolysis and photodegradation, which can lead to partial or complete degradation.
2. Through biological processes which can be further broken down into aerobic and anaerobic processes.