Preparation And Properties Study Of Novel Biobased Polyamides/Re Composite Fibers

The rare earth elements have the special4f energy levels shielded by the5s2and5p6closed shells, which embody the materials outstanding optical properties. Rareearth complexes/Polymer composites contain both the excellent luminescentperformance of rare earth complexes and the merits of polymer materials, likechemical stability, high mechanical strength, good processing ability and so on. Thus,it has aroused great attention and been conducted extensive research.Facing the oil crisis and the increasing demand of environment protection, ourgovernment and investment organizations increased investment in developingenvironment-friendly materials, especially through converting renewable biomass intovarious polymer application products. Herein, we report the successful synthesis ofunique bio-based polyamides by melting copolycondensation of four monomersderived from large-scaled biomass feedstock: sebacic acid (SA), itaconic acid (IA),1,10-diaminodecane (DD) and1,4-diaminobutane (BD), and they were named ascopolyamide poly (buta-co-deca) methylene (itaconic-co-sebac) amides (BDIS).Considering the above reasons, we prepared novel polyamide/rare earth complexcomposites through doping and chemical bonding methods using BDIS as the matrix,which is rarely reported in present articles. In this paper, we have synthesized twokinds of rare earth complex, Eu(TTA)3Phen and Eu(TTA)2Phen(AA), and by solutionmixing and in-situ reaction, we obtained novel polyamide/rare earth complexcomposites. Then, through electro-spinning and melt spinning, we prepared thecomposite fibers with fine dispersion and good interfacial interaction. The influencefor structure and properties of the composite fibers effected by the species of rare earth complex, the adding quantity of rare earth complex and distinct preparationmethods have been demonstrated through characterization of Fourier-transformedinfrared spectroscopy (FT-IR), X-ray diffraction spectroscopy (XRD), differentialscanning calorimetry (DSC), mechanical tests，scanning electron micrographs (SEM)and fluorescence tests. The results show that the energy transfer between rare earthcomplexes and the matrix is good. With more rare earth complexes added into thecomposite fibers, the more intense of the fluorescence intensity. When the addingquantity reached to the maximum value, the concentration quenching‘emerged.