应用化学 ›› 2024, Vol. 41 ›› Issue (11): 1596-1604.DOI: 10.19894/j.issn.1000-0518.240122

• 研究论文 • 上一篇    下一篇

Ti-MOF催化合成生物基聚2,5-呋喃二甲酸乙二醇酯及醇解

刘利鑫1,2, 姚淑华1(), 曹旋1, 周冠男2, 王瑞2, 李璐2()   

  1. 1.沈阳化工大学,辽宁省工业排放重金属处理与资源化工程研究中心,沈阳 110142
    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:2024-04-12 接受日期:2024-08-30 出版日期:2024-11-01 发布日期:2024-12-04
  • 通讯作者: 姚淑华,李璐
  • 基金资助:
    国家重点研发计划(2022YFC2105800);辽宁省科技计划(2022JH24/10200024);医工联合创新基金(MU-1&DICP UN202210)

Synthesis and Alcoholysis of Bio-Based Poly(ethylene 2,5-furandicarboxylate) Catalyzed by Ti-MOF

Li-Xin LIU1,2, Shu-Hua YAO1(), Xuan CAO1, Guan-Nan ZHOU2, Rui WANG2, Lu LI2()   

  1. 1.Liaoning Engineering Research Center for Treatment and Recycling of Industrially Discharged Heavy Metals,Shenyang University of Chemical Technology,Shenyang 110142,China
    2.Division of Energy Materials (DNL 22),Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China
  • Received:2024-04-12 Accepted:2024-08-30 Published:2024-11-01 Online:2024-12-04
  • Contact: Shu-Hua YAO,Lu LI
  • About author:lilu528@dicp.ac.cn
    yaoshuhua@syuct.edu.cn
  • Supported by:
    the National Key Research and Development Programme of China(2022YFC2105800);the Science and Technology Programme of Liaoning Province(2022JH24/10200024);the Basic Research Project of the Department of Education of Liaoning Province(JYTQN2023373);the Medical-Industrial Joint Innovation Fund(DMU-1&DICP UN202210)

摘要:

通过油浴热回流法制备绿色无毒的Ti-MOF(MIL-125)钛系催化剂,并成功应用于合成生物基聚2,5-呋喃二甲酸乙二醇酯(PEF)及醇解。 通过粉末X射线衍射(XRD)、傅里叶变换红外光谱(FT-IR)和场发射扫描电子显微镜(SEM)等测试手段对MIL-125的结构形貌、元素组成等进行表征分析,并通过氨气程序升温脱附测试(NH3-TPD)等手段揭示催化剂表面具有丰富酸性位点,这些酸性位点在催化合成PEF和催化醇解PEF中,均表现出很高的催化活性。 在催化剂用量仅为2,5-呋喃二甲酸(FDCA)摩尔量的0.01%的条件下,210 ℃反应55 min溶液即达到澄清透明状态(酯化反应结束)。 缩聚阶段在230 ℃保持3 h,PEF/MIL-125-230的数均相对分子质量(Mn)即可达到3.8×104,并且合成的PEF数均相对分子质量分布(PDI)较窄(1.9)。此外,MIL-125不仅起到催化作用,还赋予PEF良好的紫外屏蔽与抗蓝光能力,可屏蔽高达87%的紫外光和34%蓝光。 醇解实验表明,PEF中保留的MIL-125具有催化乙二醇醇解PEF到单体2,5-呋喃二甲酸乙二醇酯(BHEFDC)的能力。 本研究拓宽了MOFs的催化领域并为生物基聚酯的循环回收开辟了新途径。

关键词: 聚酯催化剂, 金属有机骨架材料, 聚2, 5-呋喃二甲酸乙二醇酯, 醇解

Abstract:

The green and non-toxic Ti-MOF(MIL-125) titanium catalyst was prepared by the oil bath thermal reflux method and was successfully used in the synthesis of bio-based poly(ethylene 2,5-furandicarboxylate) (PEF) and alcoholysis. The structural morphology and elemental composition of MIL-125 were characterized and analyzed by powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and field emission scanning electron microscopy (SEM). The catalyst surface was also revealed to be rich in acid sites by means of Ammonia programmed temperature desorption test(NH3-TPD), which showed high catalytic activity in both catalytic synthesis of PEF and catalytic alcoholysis of PEF reactions. Under the condition that the catalyst dosage is only 0.01% of the molar amount of 2,5-furandicarboxylic acid (FDCA), the esterification stage reaches clarity and transparency (the end of the esterification reaction) at 210 ℃ and 55 min. When the polycondensation stage is maintained at 230 ℃ for 3 h, the number average molecular mass of PEF/MIL-125-230 can reach Mn=3.8×104, and the synthesized PEF relative molecular mass distribution is narrow PDI=1.9; In addition, MIL-125 not only plays a catalytic role, but also endows PEF with good UV shielding and anti-blue light capabilities, shielding up to 87% of UV light and 34% of blue light. Alcoholysis experiments show that the residual MIL-125 in PEF has the ability to catalyze the alcoholysis of ethylene glycol from PEF to the monomer ethylene glycol furandicarboxylate (BHEFDC). This study broadens the catalytic field of MOFs and opens up a new way for the recycling of bio-based polyesters.

Key words: Polyester catalyst, Metal-organic frameworks, Poly(ethylene 2, 5-furandicarboxylate), Alcoholysis

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