Preparation And Properties Of Silicon-containing Polymer Lanthanide (Tb³⁺,Eu³⁺) Luminescent Materials

In this thesis,the preparation and application of lanthanide luminescent polymer materials are expounded,and introducing silicon into polymer matrix to improve materials' heat resistance is an effective method.Based on the above,two kinds of silicon-containing lanthanide luminescent polymer materials are prepared respectively by the bonding or doping methods and their related properties are investigated.In the case of the bonding method,1,3,5-trimethyltris(3,3,3-trifluoropropyl)cyclotrisiloxane(D3F)after ring opening reaction is reacted with [3-(2-aminoethyl)aminopropyl] trimethoxysilane(SCA-603)to obtain the amino-modified fluorine silicone oil(PFSi).Then PFSi reacts with isophorone diisocyanate(IPDI)to obtain the polymer matrix(PFSi-IPDI).The PFSi-IPDI and 1,10-Phenanthroline(Phen),which are used as the host macromolecular ligand and the secondary small-molecular co-ligand respectively,coordinate with rare earth terbium ions,and Na OH solution is used to adjust p H to 6-7.Silicon-containing polymer lanthanide(Tb3+)luminescent materials are prepared through a series of post-processing.The luminescent materials are characterized by X-ray diffraction analysis(XRD),fourier transform infrared(FI-TR),scanning electron microscope(SEM),thermogravimetric analysis(TGA),photoluminescence excitation(PLE)and emission(PL)spectroscopy.Analysis results show that the luminescent materials have been successfully prepared,and appear as approximately spherical morphology.The excitation and emission wavelengthes are 330 and 544 nm respectively,and the materials emit the pure green light.The luminescent materials possess excellent fluorescence intensity,and the decay time belongs to millisecond.At the same time,when rare earth terbium ions concentration is 0.6 mol/L,the luminescent intensity of the materials is the largest.In addition,thermogravimetric analysis shows the T5 value is greater than 200 ?,suggesting excellent thermal stability.In the case of the doping method,pyromellitic dianhydride(PMDA),1,10-Phenanthroline(Phen)and europium(?)chloride hexahydrate(Eu Cl3·6H2O)are mixed in a ratio of 2:1:1,and react to obtain the complex Eu(PMDA)2Phen.During the process,Na OH solution was used to adjust p H to 6-7.Then Eu(PMDA)2Phen is doped to the polymer matrix PFSi-IPDI under certain conditions,and doped silicon-containing polymer luminescent materials(PFSi-IPDI)-Eu(PMDA)2Phen are prepared after a series of post-processing.The luminescent materials are characterized by X-ray diffraction analysis(XRD),fourier transform infrared(FI-TR),scanning electron microscope(SEM),thermogravimetric analysis(TGA),photoluminescence excitation(PLE)and emission(PL)spectroscopy.Analysis results as follows: Eu(PMDA)2Phen and(PFSi-IPDI)-Eu(PMDA)2Phen are successfully prepared,and the appearance of the materials is approximately spherical morphology.The materials can emit strong red light under the excitation wavelength of 302 nm,and the luminescent intensity is the strongest when the rare earth terbium ions concent is 10%.Moreover,the T5 value is 141 ?,which indicates the materials show excellent heat resistance.