By a News Reporter-Staff News Editor at Science Letter -- A new study on Nanostructures is now available. According to news reporting originating from Grenoble, France, by NewsRx correspondents, research stated, "Three different self-assembled nanostructures, i.e., lamellar (Lam), hexagonally close-packed cylinder (Hex), and body-centered cubic (BCC), have been obtained from ABA triblock (MH-b-PCL-b-MH) and A(2)B star-branched copolymers ((MH)(2)-b-PCL) consisting of maltoheptaose (MH, as the A block) and polycaprolactone (PCL, as the B block). MH-b-PCL-b-MH and(MH)(2)-b-PCL were synthesized by the click reaction of the alpha,omega-diazido and alpha,alpha-diazido end-functionalized PCLs with N-maltoheptaosyl-3-acetamido-1-propyne in high yields."
Our news editors obtained a quote from the research from National Center for Scientific Research (CNRS), "The self-assembled nanostructures of the block copolymers (BCPs) in bulk were investigated as a function of temperature by time-resolved small-angle X-ray scattering using a synchrotron light source. The SAXS analysis revealed that the obtained BCPs exhibited microphase-separated structures with the domain-spacing of 10.4-21.0 nm. MH-b-PCL-b-MH (the MH volume fraction (phi(MH)) of 0.28 and 0.15) exhibited a hexagonally close-packed cylinder (Hex) at below ca. 230 degrees C, and the self-assembling behavior of MH-b-PCL-b-MH was essentially the same as that of the diblock counterpart, MH-b-PCL, having comparable phi(MH) values. The lamellar (Lam) morphology, which was unattainable from the corresponding linear counterparts, was observed from (MH)(2)-b-PCL (phi(MH) = 0.27 and 0.16)."
According to the news editors, the research concluded: "Furthermore, the microphase transitions from the Hex into the body-centered cubic sphere and the Lam into the Hex were observed upon the thermal caramelization of the MH block."
For more information on this research see: Synthesis, Self-Assembly, and Thermal Caramelization of Maltoheptaose-Conjugated Polycaprolactones Leading to Spherical, Cylindrical, and Lamellar Morphologies. Macromolecules, 2013;46(22):8932-8940. Macromolecules can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Macromolecules - www.pubs.acs.org/journal/mamobx)
The news editors report that additional information may be obtained by contacting T. Isono, Grenoble Alpes Univ, Center Rech Macromol Vegetales CERMAV, UPR CNRS 5301, F-38041 Grenoble 9, France. Additional authors for this research include I. Otsuka, D. Suemasa, C. Rochas, T. Satoh, R. Borsali and T. Kakuchi (see also Nanostructures).
Keywords for this news article include: France, Europe, Grenoble, Nanostructural, Nanostructures, Nanotechnology, Emerging Technologies
Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC