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Copper-based metal organic framework/polymer foams with long-lasting antibacterial effect

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Abstract

The development of durable and effective antibacterial materials has been a research hotspot. Here, we reported a new kind of long-lasting stable antibacterial material [Cu-metal–organic framework (MOF)-embedded polyethylene (PE)/ethylene vinyl acetate copolymer (EVA), namely Cu-MOF-embedded PE/EVA] through extrusion foaming, and its structure was characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffractometry (XRD) and energy dispersive spectroscopy (EDS). The degree of agglomeration or cluster formation, thermal stability, and melting point temperature of different contents of Cu-MOF/PE/EVA foams were evaluated by scanning electron microscopy (SEM), thermal gravimetric analysis (TGA), and differential scanning calorimetry (DSC), respectively. The results indicated that with the increase of Cu-MOF content, the average size and swelling ratio for foams increased, instead, the density decreased. Besides, the surface gradually showed good hydrophobicity. Remarkably, the water absorption rate was nearly 8 times that of pure PE/EVA when the Cu-MOF content reached 3%. Since Cu-MOF is stably embedded in the foaming structure and well dispersed, it can release Cu2+ at a rate of about 37 ppb/day in foams containing 3% Cu-MOF, which not only maintains the antimicrobial capacity up to 99.2%, but also have no cytotoxicity. Finally, a promising new candidate for medical material with excellent, durable antibacterial ability was proposed.

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The datasets generated during and/or analyzed during the current study are available from the corresponding author upon reasonable request.

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Acknowledgement

This research was financially supported by the University Student Innovation Program (2021R434005) and the Lishui “Higher Education Research” Special Project (No. GJYJ202110).

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  1. Xiaoyu Mao and Zi Ye have contributed equally to this paper.

Authors and Affiliations

  1. College of Ecology, Lishui University, Lishui, 323000, People’s Republic of China

    Xiaoyu Mao, Jiaming Liang, Jiawen Lin, Xinyu Mei, Danfeng Deng, Renjie Shi & Zefeng Wang

  2. R&D Center of Green Manufacturing New Materials and Technology of Synthetic Leather, Sichuan University-Lishui University, Lishui, People’s Republic of China

    Xiaoyu Mao & Zefeng Wang

  3. Department of Ophthalmology, Xinyang Central Hospital, Xinyang, 464099, People’s Republic of China

    Zi Ye

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  1. Xiaoyu Mao
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Correspondence to Zefeng Wang.

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Mao, X., Ye, Z., Liang, J. et al. Copper-based metal organic framework/polymer foams with long-lasting antibacterial effect. Iran Polym J (2024). https://doi.org/10.1007/s13726-024-01314-9

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