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- Title
聚 2, 5-呋喃二甲酸乙二醇酯/纳米二氧化钛/硅藻土复合材料的 制备和表征.
- Authors
李钰炫; 赵昱昊; 代雨泽; 姜 敏; 张 瑛; 周光远
- 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%.
- Subjects
NMR spectrometers; ATTENUATED total reflectance; IR spectrometers; ETHYLENE glycol; TITANIUM dioxide nanoparticles; POLYESTERS
- Publication
Chinese Journal of Applied Chemistry, 2023, Vol 40, Issue 9, p1277
- ISSN
1000-0518
- Publication type
Article
- DOI
10.19894/j.issn.1000-0518.230079