摘要
Eu（OA）3（TTA） （OA=cis-9-octadecenoic acid, TTA=4,4,4-trifluoro-l-（2-thienyl）-l,3-butanedione） complexes （Eu- com- plexes） containing the ligand OA with long molecular chains were synthesized. The Eu（OA）3（TTA） complexes and peroxide were added into nitrile-butadiene rubber （NBR） by mechanical shearing to get the uncured composites. The cured composites were ob- tained by vulcanizing the uncured composites at high temperature. The in-situ reaction including polymerization and grafting of Eu-complex took place at the curing process, which was verified by Fourier transform infrared spectroscopy （FTIR） and X-ray dif- fraction （XRD）. Scanning electron microscopy （SEM） and transmission electron microscopy （TEM） observations showed the fine dispersion of Eu（OA）3（TTA） complex （Eu-complex） in the cured composites compared with the uncured ones. Fluorescent spectra and Judd-Ofelt parameters analysis revealed that the fluorescent intensity increased approximate linearly with the content of Eu- complex increasing due to the in-situ reaction and long molecular chains of OA. The fluorescent lifetime of composites was longer than that of original Eu-complexes.
Eu（OA）3（TTA） （OA=cis-9-octadecenoic acid, TTA=4,4,4-trifluoro-l-（2-thienyl）-l,3-butanedione） complexes （Eu- com- plexes） containing the ligand OA with long molecular chains were synthesized. The Eu（OA）3（TTA） complexes and peroxide were added into nitrile-butadiene rubber （NBR） by mechanical shearing to get the uncured composites. The cured composites were ob- tained by vulcanizing the uncured composites at high temperature. The in-situ reaction including polymerization and grafting of Eu-complex took place at the curing process, which was verified by Fourier transform infrared spectroscopy （FTIR） and X-ray dif- fraction （XRD）. Scanning electron microscopy （SEM） and transmission electron microscopy （TEM） observations showed the fine dispersion of Eu（OA）3（TTA） complex （Eu-complex） in the cured composites compared with the uncured ones. Fluorescent spectra and Judd-Ofelt parameters analysis revealed that the fluorescent intensity increased approximate linearly with the content of Eu- complex increasing due to the in-situ reaction and long molecular chains of OA. The fluorescent lifetime of composites was longer than that of original Eu-complexes.
基金
Project supported by the Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT, IRT0807)
National Natural Science Foundation of China (51073008, 51103005)
the Fundamental Research Funds for the Central Universities in China (ZY1103)
