By a News Reporter-Staff News Editor at Journal of Technology -- New research on Polymer Research is the subject of a report. According to news reporting originating from Medford, Massachusetts, by VerticalNews correspondents, research stated, "Poly(L-lactic acid) (PLLA) is an important biomaterial with application as surgical meshes, sutures, and in artificial tissue. Here we prepared novel fibers by electrospinning solutions containing PLLA and a specially synthesized talc (ts), characterized by the presence of aliphatic chains in the structure and completely soluble in the electrospinning solutions."
Our news editors obtained a quote from the research from Tufts University, "Even a small amount of ts (2 wt.%) in the toluene/chloroform solvent increases the solution viscosity, most likely because of specific interactions between talc and PLLA. Morphological characterization demonstrated that homogenous fibers, of neat PLLA and PLLA/ts, are obtained by proper choice of electrospinning conditions. Among the parameters studied, relative humidity (Rh) was found significantly to affect fiber morphology. Morphological homogeneity increases by increasing Rh. In contrast to fibers containing a commercial talc, which is insoluble in the electrospinning mixture, and whose aggregates render the fiber irregular, in the case of PLLA/ts fibers the dispersion of the synthetic talc is achieved at the nanometric length scale. Electrospun mats based on PLLA/ts showed a much higher water contact angle than the neat PLLA mats, the contact angle increasing from 92 degrees to ca. 140 degrees, thus highlighting that a superhydrophobic PLLA surface is obtained by dispersing synthetic talc into PLLA fibers, widening the potential for biomedical applications of this material. Fiber properties of superhydrophobic PLLA were studied by means of differential scanning calorimetry (DSC), static and real-time wide angle X-ray diffraction (WAXD), and water contact angle measurements."
According to the news editors, the research concluded: "Talc was found to promote the development of a small amount of crystallinity during the electrospinning process, and to favor the development of the alpha crystallographic form during annealing."
For more information on this research see: Impact of synthetic talc on PLLA electrospun fibers. European Polymer Journal, 2013;49(9):2572-2583. European Polymer Journal can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England. (Elsevier - www.elsevier.com; European Polymer Journal - www.elsevier.com/wps/product/cws_home/294)
The news editors report that additional information may be obtained by contacting O. Monticelli, Tufts University, Dept. of Phys & Astron, Center Nanoscop Phys, Medford, MA 02155, United States. Additional authors for this research include S. Bocchini, L. Gardella, D. Cavallo, P. Cebe and G. Germelli.
Keywords for this news article include: Medford, Massachusetts, United States, Polymer Research, North and Central America
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