Biopolyester-based systems containing naturally occurring compounds with enhanced thermo-oxidative stability
Biopolyester-based systems containing naturally occurring compounds with enhanced thermo-oxidative stability
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DOI：
10.5301/jabfm.5000322
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发表时间：
2016-10-01
影响因子：
2.5
通讯作者：
Dintcheva, Nadka Tzankova
中科院分区：
文献类型：
--
作者：
Arrigo, Rossella;Morici, Elisabetta;Dintcheva, Nadka Tzankova
背景资料：方法：将阿魏酸（FerAc）、香草酸（VanAc）、槲皮素（Querc）和维生素E（VitE）等天然酚类和多酚类化合物引入聚乳酸（PLA）中，研究其热氧老化稳定性。对含有不同量天然稳定剂的配制体系的初步表征表明，所用的所有化合物都起增塑剂的作用，导致相对于纯PLA的流变功能降低，而没有显著改变原料的结晶度。通过光谱和热分析对纯PLA和PLA/天然化合物体系的热氧化行为进行的研究表明，所有考虑的稳定剂都能够对热氧化现象发挥显着的抗氧化作用。因此，所有考虑的天然化合物都被提议作为生态友好型稳定剂，以获得具有增强的热氧化稳定性的完全生物基聚合物系统，适用于生物医学应用。
Background: This work presents a sustainable approach for the stabilization of polylactic acid (PLA) against thermooxidative aging.Methods: Naturally occurring phenolic and polyphenolic compounds, such as ferulic acid (FerAc), vanillic acid (VanAc), quercetin (Querc) and vitamin E (VitE), were introduced into PLA.Results: The preliminary characterization of the systems formulated containing different amounts of natural stabilizers showed that all compounds used acted as plasticizers, leading to a decrease in rheological functions with respect to neat PLA, without significantly modifying the crystallinity of the raw material. The study of the thermo-oxidative behavior of neat PLA and PLA/natural compound systems, performed by spectrometric and thermal analyses, indicated that all stabilizers considered were able to exert a remarkable antioxidant action against thermo-oxidative phenomena.Conclusions: All natural compounds considered are thus proposed as ecofriendly stabilizers, to get fully bio-based polymer systems with enhanced thermo-oxidative stability, suitable for biomedical applications.