应用化学 ›› 2023, Vol. 40 ›› Issue (9): 1277-1287.DOI: 10.19894/j.issn.1000-0518.230079

• 研究论文 • 上一篇    下一篇

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

李钰炫1,2, 赵昱昊1,2, 代雨泽2, 姜敏2(), 张瑛1(), 周光远2()   

  1. 1.大连理工大学环境学院,工业生态与环境工程教育部重点实验室,大连 116024
    2.中国科学院大连化学物理研究所,能源材料研究部,大连 116023
  • 收稿日期:2023-03-29 接受日期:2023-07-25 出版日期:2023-09-01 发布日期:2023-09-14
  • 通讯作者: 姜敏,张瑛,周光远
  • 基金资助:
    国家自然科学基金(52273098)

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

摘要:

以2,5-呋喃二甲酸二甲酯(DMFD)、乙二醇(EG)为原料,原位添加扩链剂均苯四甲酸二酐(PMDA)、纳米二氧化钛(TiO2)、硅藻土(DE),以钛酸四丁酯为催化剂,采用酯交换-熔融缩聚法制备聚2,5-呋喃二甲酸乙二醇酯(PEF)/TiO2/DE复合材料。通过核磁共振波谱仪(NMR)、傅里叶变换衰减全反射红外光谱仪(ATR-FTIR)、X射线衍射仪(XRD)和热重分析仪(TGA)等技术手段对其结构、热学性能、力学性能、气体渗透性能及紫外屏蔽性能进行表征。结果表明,PEF/TiO2/DE复合材料被成功制备,且TiO2及DE均为物理掺杂。DE粒子在PEF/TiO2/DE复合材料内部分散良好。所有聚酯粉末为无定形聚集态结构。与PEF相比,PEF/TiO2/DE复合材料的5%质量损失温度(Td,5%分解速率最快温度(Tdmax)分别提升12.1 ℃和8.4 ℃。PEF/TiO2/DE复合材料的拉伸模量及抗冲击强度最高分别达到2657 MPa和3.2×104 J/m2。纳米TiO2和DE的引入调控了PEF/TiO2/DE复合材料对CO2、O2的渗透性,CO2屏障改善系数(BIFCO2)由PEF/TiO2的3.02变为1.37~4.64,O2屏障改善系数(BIFO2)由PEF/TiO2的1.36变为0.7~2.07; 此外,纳米TiO2的加入赋予PEF良好的紫外屏蔽性能: PEF/TiO2复合材料的紫外屏蔽率由PEF的45.38%提高至83.85%,提高了85%,PEF/TiO2/DE复合材料的紫外屏蔽性能均大于84%。

关键词: 聚2, 5-呋喃二甲酸乙二醇酯, 纳米二氧化钛, 硅藻土, 气体阻隔性能, 紫外屏蔽性能

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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