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  

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

作　　者：李钰炫 赵昱昊 代雨泽 姜敏 张瑛[1] 周光远 LI Yu-Xuan;ZHAOYu-Hao;DAI Yu-Ze;JIANG Min;ZHANG Ying;ZHOU Guang-Yuan(Laboratory of Industrial Ecology and Environmental Engineering(MOE),School of Environmental Science and Technology,Dalian University of Technology,Dalian 116024,China;Division of Energy Materials(DNL 22),Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China)

机构地区：[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

出　　处：《应用化学》2023年第9期1277-1287,共11页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金(Nos.52273098,52073284)资助。

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(TiO_(2))、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)/TiO_(2)/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/TiO_(2)/DE复合材料被成功制备,且TiO_(2)及DE均为物理掺杂。DE粒子在PEF/TiO_(2)/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/TiO_(2)/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/TiO_(2)/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3.2×10^(4)J/m^(2)。纳米TiO_(2)和DE的引入调控了PEF/TiO_(2)/DE复合材料对CO_(2)、O_(2)的渗透性,CO_(2)屏障改善系数(BIF_(CO_(2)))由PEF/TiO_(2)的3.02变为1.37~4.64,O_(2)屏障改善系数(BIFO_(2))由PEF/TiO_(2)的1.36变为0.7~2.07;此外,纳米TiO_(2)的加入赋予PEF良好的紫外屏蔽性能:PEF/TiO_(2)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/TiO_(2)/DE复合材料的紫外屏蔽性能均大于84%。A series of novel PEF/TiO_(2)/diatomaceous earth(DE)composites are prepared from dimethyl 2,?5-furandicarboxylate(DMFD),ethylene glycol(EG),pyromellitic dianhydride(PMDA),DE and TiO_(2)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-TiO_(2)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/TiO_(2)/DE composites are increased by 12.1 and 8.4℃,respectively.The tensile modulus and impact strength of PEF/TiO_(2)/DE composites reach 2657 MPa and 3.2×10^(4) J/m^(2),respectively.The CO_(2)and O_(2)permeability of PEF/TiO_(2)/DE composites are regulated by the addition of nano-TiO_(2)and DE.The CO_(2)barrier improvement coefficient(BIF_(CO_(2)))is increased from 3.02 for PEF/TiO_(2)to 1.37~4.64,and the O_(2)barrier improvement coefficient(BIF_(CO_(2)))is increased from 1.36 for PEF/TiO_(2)to 0.7~2.07.In addition,PEF/TiO_(2)has functional properties such as UV resistance with the addition of nano-TiO_(2):the UV shielding rate of PEF/TiO_(2)composites is increased by 85%,from 45.38%of PEF to 83.85%of PEF/TiO_(2)composite films,and the UV shielding performance of PEF/TiO_(2)/DE composites is greater than 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 

分 类 号：O631.5[理学—高分子化学]