Joined: Nov 2013
HYREL Prints in PCL (Polycaprolactone)
A pair of PhD candidates from LA Tech came out last week and we helped them print in PCL by melting the pellets in our KRA-15 head and then printing with it.
PCL is degraded by hydrolysis of its ester linkages in physiological conditions (such as in the human body) and has therefore received a great deal of attention for use as an implantable biomaterial. In particular it is especially interesting for the preparation of long term implantable devices, owing to its degradation which is even slower than that of polylactide.
PCL has been approved by the Food and Drug Administration (FDA) in specific applications used in the human body as (for example) a drug delivery device, suture (sold under the brand name Monocryl or generically), or adhesion barrier. It is being investigated as a scaffold for tissue repair via tissue engineering, GBR membrane. It has been used as the hydrophobic block of amphiphilic synthetic block copolymers used to form the vesicle membrane of polymersomes.
It is also used in housing applications.
A variety of drugs have been encapsulated within PCL beads for controlled release and targeted drug delivery.
Hobbyist and prototyping
Home-made bicycle light mounting, made from PCL
PCL also has many applications in the hobbyist market where it is know as Polymorph or Shapelock. It has physical properties of a very tough, nylon-like plastic that softens to a putty-like consistency at only 60 °C, easily achieved by immersing in hot water. PCL's specific heat and conductivity are low enough that it is not hard to handle by hand at this temperature. This makes it ideal for small-scale modeling, part fabrication, repair of plastic objects, and rapid prototyping where heat resistance is not needed. Though softened PCL readily sticks to many other plastics when at higher temperature, if the surface is cooled, the stickiness can be minimized while still leaving the mass pliable.
See also: See also: http://3dprint.com/7793/3d-print-antibiotics-implants/
|10-13-2015 10:58 PM
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