title: Shape memory effect of poly(D,L-lactide)/Fe3O4 nanocomposites by inductive heating of magnetite particles.
abstract: In this paper, the preparation of biocompatible poly(D,L-lactide) (PDLLA)/magnetite (Fe(3)O(4)) nanocomposites and their shape memory effect are reported. Fe(3)O(4) nanoparticles with an average size of 20 nm were synthesized by chemical co-precipitation and mixed uniformly with a PDLLA matrix. Scanning electron microscopy (SEM), differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR) and mechanical testing were carried out to determine the micro-surface morphology, glass transition temperature (T(g)), functional groups change and mechanical properties of the PDLLA/Fe(3)O(4) nanocomposites. The interesting shape memory behavior of the nanocomposites induced by an ultrasonic alternating magnetic field were also observed. SEM and DSC showed that there was a close interaction between the polymer matrix and the magnetic nanoparticles. Formation of weak hydrogen bonds between the C=O in PDLLA and Fe-OH groups of the surface of nano-crystalline Fe(3)O(4) was examined by FTIR. The PDLLA/Fe(3)O(4) nanocomposites displayed a desirable shape memory effect.
authors.affiliation: School of Materials Science and Engineering, Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, 610031, PR China.
authors.forename: Xiaotong
authors.initials: X
authors.lastname: Zheng
authors.forename: Shaobing
authors.initials: S
authors.lastname: Zhou
authors.forename: Yu
authors.initials: Y
authors.lastname: Xiao
authors.forename: Xiongjun
authors.initials: X
authors.lastname: Yu
authors.forename: Xiaohong
authors.initials: X
authors.lastname: Li
authors.forename: Peizhuo
authors.initials: P
authors.lastname: Wu
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry*; D002152:Calorimetry, Differential Scanning; D052203:Ferrosoferric Oxide / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D053761:Nanocomposites / Q000737:chemistry*; D011091:Polyesters / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D044366:Transition Temperature
chemical_list: D001672:Biocompatible Materials; D011091:Polyesters; C033616:poly(lactide); D052203:Ferrosoferric Oxide