Chinese Journal of Applied Chemistry ›› 2023, Vol. 40 ›› Issue (9): 1277-1287.DOI: 10.19894/j.issn.1000-0518.230079

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Preparation and Characterization of Poly(ethylene 2,5-furandicarboxylate)/TiO2 Nanoparticles/ Diatomaceous Earth Composites

Yu-Xuan LI1,2, Yu-Hao ZHAO1,2, Yu-Ze DAI2, Min JIANG2(), Ying ZHANG1(), Guang-Yuan ZHOU2()   

  1. 1.(Laboratory of Industrial Ecology and Environmental Engineering (MOE),School of Environmental Science and Technology,Dalian University of Technology,Dalian 116024,China )
    2.Division of Energy Materials (DNL 22),Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China

Abstract:

A series of novel PEF/TiO2/diatomaceous earth (DE) composites are prepared from dimethyl 2,?5-furandicarboxylate (DMFD), ethylene glycol (EG), pyromellitic dianhydride (PMDA), DE and TiO2 nanoparticles via in-situ polycondensation. And their structure, thermal properties, mechanical properties, gas permeability properties and ultraviolet shielding properties are characterized by nuclear magnetic resonance spectrometer (NMR), fourier transform attenuated total reflection infrared spectrometer (ATR-FTIR), X-ray diffractometer (XRD), thermogravimetric analyzer (TGA) and other technical means. The results show that the composites are successfully prepared, and nano-TiO2 and DE are both physically doped. The DE particles are uniformly dispersed within PEF. All polyester powders have an amorphous aggregate structure. Compared with PEF, the temperature at 5% mass loss (Td,5%) and the maximum mass loss rate (Tdmax) of PEF/TiO2/DE composites are increased by 12.1 and 8.4 ℃, respectively. The tensile modulus and impact strength of PEF/TiO2/DE composites reach 2657 MPa and 3.2×104 J/m2, respectively. The CO2 and O2 permeability of PEF/TiO2/DE composites are regulated by the addition of nano-TiO2 and DE. The CO2 barrier improvement coefficient (BIFCO2) is increased from 3.02 for PEF/TiO2 to 1.37~4.64, and the O2 barrier improvement coefficient (BIFCO2) is increased from 1.36 for PEF/TiO2 to 0.7~2.07. In addition, PEF/TiO2 has functional properties such as UV resistance with the addition of nano-TiO2: the UV shielding rate of PEF/TiO2 composites is increased by 85%, from 45.38% of PEF to 83.85% of PEF/TiO2 composite films, and the UV shielding performance of PEF/TiO2/DE composites is greater than 84%.

Key words: Poly(ethylene 2, 5-furandicarboxylate) (PEF), Titanium dioxide nanoparticles (TiO2), Diatomaceous earth (DE), Gas barrier, Anti-ultraviolet functions

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