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磁铁矿/聚乳酸纳米复合材料的声化学合成

Sonochemical Synthesis of Magnetite/Poly(lactic acid) Nanocomposites.

作者信息

de França Juliene Oliveira Campos, Lima Quezia Dos Santos, Barbosa Mariana Martins de Melo, Fonseca Ana Lívia Fernandes, Machado Guilherme de França, Dias Sílvia Cláudia Loureiro, Dias José Alves

机构信息

Laboratory of Catalysis, Chemistry Institute (IQ-UnB), University of Brasília, Campus Universitário Darcy Ribeiro-Asa Norte, Brasília 70910-900, DF, Brazil.

出版信息

Polymers (Basel). 2023 Dec 11;15(24):4662. doi: 10.3390/polym15244662.

DOI:10.3390/polym15244662
PMID:38139914
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10747535/
Abstract

Nanocomposites based on poly(lactic acid) (PLA) and magnetite nanoparticles (MNP-FeO) show promise for applications in biomedical treatments. One key challenge is to improve the stabilization and dispersion of MNP-FeO. To address this, we synthesized MNP-FeO/PLA nanocomposites using ultrasound mediation and a single iron(II) precursor, eliminating the need for surfactants or organic solvents, and conducted the process under ambient conditions. The resulting materials, containing 18 and 33 wt.% FeO, exhibited unique thermal behavior characterized by two mass losses: one at a lower degradation temperature (T) and another at a higher T compared to pure PLA. This suggests that the interaction between PLA and MNP-FeO occurs through hydrogen bonds, enhancing the thermal stability of a portion of the polymer. Fourier Transform Infrared (FT-IR) analysis supported this finding, revealing shifts in bands related to the terminal -OH groups of the polymer and the Fe-O bonds, thereby confirming the interaction between the groups. Raman spectroscopy demonstrated that the PLA serves as a protective layer against the oxidation of MNP-FeO in the 18% MNP-FeO/PLA nanocomposite when exposed to a high-power laser (90 mW). Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM) analyses confirmed that the synthetic procedure yields materials with dispersed nanoparticles within the PLA matrix without the need for additional reactants.

摘要

基于聚乳酸（PLA）和磁铁矿纳米颗粒（MNP-FeO）的纳米复合材料在生物医学治疗应用中显示出前景。一个关键挑战是提高MNP-FeO的稳定性和分散性。为了解决这个问题，我们使用超声介导和单一铁（II）前驱体合成了MNP-FeO/PLA纳米复合材料，无需表面活性剂或有机溶剂，并在环境条件下进行该过程。所得材料含有18重量%和33重量%的FeO，表现出独特的热行为，其特征在于有两次质量损失：一次在比纯PLA更低的降解温度（T）下，另一次在更高的T下。这表明PLA和MNP-FeO之间的相互作用是通过氢键发生的，增强了一部分聚合物的热稳定性。傅里叶变换红外（FT-IR）分析支持了这一发现，揭示了与聚合物末端-OH基团和Fe-O键相关的谱带发生了位移，从而证实了这些基团之间的相互作用。拉曼光谱表明，当暴露于高功率激光（90 mW）时，在18% MNP-FeO/PLA纳米复合材料中，PLA作为MNP-FeO氧化的保护层。透射电子显微镜（TEM）和扫描电子显微镜（SEM）分析证实，该合成程序产生的材料中纳米颗粒分散在PLA基质中，无需额外的反应物。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ee84/10747535/9a0a9f1fac6f/polymers-15-04662-g016.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ee84/10747535/7354017cc222/polymers-15-04662-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ee84/10747535/346fae0570b9/polymers-15-04662-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ee84/10747535/8e27cce61a48/polymers-15-04662-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ee84/10747535/6cc8da5c7141/polymers-15-04662-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ee84/10747535/981aa81266e5/polymers-15-04662-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ee84/10747535/41607fb1450c/polymers-15-04662-g015.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ee84/10747535/9a0a9f1fac6f/polymers-15-04662-g016.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ee84/10747535/7354017cc222/polymers-15-04662-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ee84/10747535/99ef53fe900c/polymers-15-04662-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ee84/10747535/788674e86bd0/polymers-15-04662-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ee84/10747535/fbd2f9e12407/polymers-15-04662-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ee84/10747535/ac29dfe29fa3/polymers-15-04662-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ee84/10747535/9db16d0cc3a5/polymers-15-04662-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ee84/10747535/395337fa35bb/polymers-15-04662-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ee84/10747535/2cbee2c12209/polymers-15-04662-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ee84/10747535/c22cc3f5b042/polymers-15-04662-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ee84/10747535/8ad4a2644464/polymers-15-04662-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ee84/10747535/346fae0570b9/polymers-15-04662-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ee84/10747535/8e27cce61a48/polymers-15-04662-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ee84/10747535/6cc8da5c7141/polymers-15-04662-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ee84/10747535/981aa81266e5/polymers-15-04662-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ee84/10747535/41607fb1450c/polymers-15-04662-g015.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ee84/10747535/9a0a9f1fac6f/polymers-15-04662-g016.jpg

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[2]
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[3]
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本文引用的文献

[1]
Multifunctional nanocarriers of FeO@PLA-PEG/curcumin for MRI, magnetic hyperthermia and drug delivery.

Nanomedicine (Lond). 2022-9

[2]
Polymers Based on PLA from Synthesis Using D,L-Lactic Acid (or Racemic Lactide) and Some Biomedical Applications: A Short Review.

Polymers (Basel). 2022-6-8

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Formation and Investigation of Mechanical, Thermal, Optical and Wetting Properties of Melt-Spun Multifilament Poly(lactic acid) Yarns with Added Rosins.

Polymers (Basel). 2022-1-19

[4]
Pathways to Green Perspectives: Production and Characterization of Polylactide (PLA) Nanocomposites Filled with Superparamagnetic Magnetite Nanoparticles.

Materials (Basel). 2021-9-8

[5]
MAPLE Coatings Embedded with Essential Oil-Conjugated Magnetite for Anti-Biofilm Applications.

Materials (Basel). 2021-3-25

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Synthesis and Characterization of PLA-Micro-structured Hydroxyapatite Composite Films.

Materials (Basel). 2020-1-8

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Preparation of PLA blends by polycondensation of D,L-lactic acid using supported 12-tungstophosphoric acid as a heterogeneous catalyst.

Heliyon. 2019-5-28

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Ultrasound-assisted synthesis and characterization of magnetite nanoparticles and poly(methyl methacrylate)/magnetite nanocomposites.

Ultrason Sonochem. 2018-5

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A simple approach for the sonochemical synthesis of FeO-guargum nanocomposite and its catalytic reduction of p-nitroaniline.

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