Virginia Tech scientists develop process for creating biocompatible fibers

Scientists at Virginia Tech have developed a single-step process for creating nonwoven fibrous mats from a small organic molecule – creating a new nanoscale material with potential applications where biocompatible materials are required, such as scaffolds for tissue growth and drug delivery.


The research will be presented in the Jan. 20 issue of Science, in the article, “Phospholipid Nonwoven Electrospun Membranes,” by Matthew G. McKee, a recent Ph.D. graduate in chemical engineering from Virginia Tech now at P&G, current chemistry students John M. Layman and Matthew P. Cashion, and chemistry professor Timothy E. Long, all at Virginia Tech.

“Phospholipids, which are the main component of cell membranes in the human body or in an apple are exquisite in terms of their ability to self-organize,” said Long.

The researchers fabricated this natural compound into a sub micron fiber – 100 times smaller than a human hair. “It is the first demonstration that electrostatic spinning, or electrospinning, a polymer processing technique, can be used with a small molecule to produce a fiber. “Clothing fibers such as polyesters and nylons are composed of large molecules, macromolecules,” Long said. “Now, we are fabricating fibers from small molecules – ones with a low molecular weight.”

Under the microscope, the resulting mat shows a porous nonwoven structure.

The researchers used a commercial product, lecithin, a natural mixture of phospholipids and neutral lipids. The materials will spontaneously organize into cylindrical or worm-like strands to form membranes.

McKee studied this self-assembly and conducted rheological experiments to fundamentally understand the association of small molecules, then he determined that once phospholipids form an entangled network they can be treated similarly to higher weight molecules and electrospun. The size of the mats is limited only by the amount of material, such as lecithin.

“This represents the synergy of electrospinning, the use of self-organizing molecules, and fundamental research to understand the behavior of such molecules,” Long said. “Matt (McKee) did a terrific job of bringing fundamental learning to a potentially new family of fabrics and membranes.”

Long said that the future opportunities are vast. “Our research group continues to fabricate molecules that self organize and can be electrospun. Potential applications include drug delivery, that is, a carrier and matrix to control the release of drugs.”

Long’s research group is working with Virginia-Maryland Regional College of Medicine researchers at Virginia Tech to develop a patch for drug delivery for horses. “We have not yet tested the specific biocompatibility (cytotoxicity) of our fibers, but we have not changed the chemical structure of the phospholipids.”

Media Contact

Susan Trulove EurekAlert!

More Information:

http://www.vt.edu

All latest news from the category: Materials Sciences

Materials management deals with the research, development, manufacturing and processing of raw and industrial materials. Key aspects here are biological and medical issues, which play an increasingly important role in this field.

innovations-report offers in-depth articles related to the development and application of materials and the structure and properties of new materials.

Back to home

Comments (0)

Write a comment

Newest articles

Lighting up the future

New multidisciplinary research from the University of St Andrews could lead to more efficient televisions, computer screens and lighting. Researchers at the Organic Semiconductor Centre in the School of Physics and…

Researchers crack sugarcane’s complex genetic code

Sweet success: Scientists created a highly accurate reference genome for one of the most important modern crops and found a rare example of how genes confer disease resistance in plants….

Evolution of the most powerful ocean current on Earth

The Antarctic Circumpolar Current plays an important part in global overturning circulation, the exchange of heat and CO2 between the ocean and atmosphere, and the stability of Antarctica’s ice sheets….

Partners & Sponsors