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首页> 外文期刊>Journal of Applied Polymer Science >Enzymatic degradation, electronic, and thermal properties of graphite- and graphene oxide-filled biodegradable polylactide/poly(epsilon-caprolactone) blend composites
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Enzymatic degradation, electronic, and thermal properties of graphite- and graphene oxide-filled biodegradable polylactide/poly(epsilon-caprolactone) blend composites

机译：石墨和石墨烯氧化物可生物降解聚氨酯/聚（ε-己内酯）混合物复合材料的酶促降解，电子和热性能

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摘要

Commodity polymers are the most widely used materials for electronic packaging applications. However, they are nondegradable and causing serious environmental damage. Addressing this challenge, the relative effects of graphite (G) and graphene oxide (GO) dispersion on the enzymatic degradation, electronic properties, thermal degradation, and crystallization behavior of enzyme degradable polylactide/poly(epsilon-caprolactone) blend composites is investigated. Owing to the oxygenated surface functionalities and excellent thermal conductivity arising from the carbon structure, the randomly dispersed GO particles do not provide electrical pathways and facilitate large enhancements in the electrical resistivity (126%) and thermal conductivity (72%) of the blend composites. However, while the G particles enhanced the thermal conductivity of the composites, they had little effect on enzymatic degradation. Furthermore, they reduced the electrical resistivity, particularly at high concentration (0.25 wt % G), as a result of the conducting delocalized electrons in the G structure and due to network formation. We also find that the energy required to initiate and propagate the thermal degradation process for GO-filled blend composites is relatively lower than that of G-filled blend composite. However, the former composites show higher crystallization rate coefficients value than that of G-filled composites and the neat blend, thereby providing better crystallization ability and miscibility with the matrix. In summary, the GO-filled blend composites are observed to show potential for use in sustainable materials for thermal management applications. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47387.
机译：商品聚合物是电子包装应用最广泛使用的材料。但是，它们是不合适的，并导致严重的环境损害。应对这一挑战，石墨（G）和氧化石墨烯（GO）色散对酶降解，电子性质，热降解，和酶可降解的聚乳酸/聚（ε-己内酯）共混物复合材料的结晶行为的相对影响进行了研究。由于含氧表面官能团和由碳结构产生的优异导热率，随机分散的去颗粒不提供电途径，并促进电阻率（126％）和混合物复合材料的导热率（72％）的大增强。然而，虽然G颗粒增强了复合材料的导热率，但它们对酶促降解几乎没有影响。此外，它们降低了电阻率，特别是在高浓度（0.25wt％g），导致G结构中的分层电子和由于网络形成。我们还发现，启动和传播热劣化方法的填充混合物复合材料所需的能量相对低于G填充混合物复合材料的能量。然而，前复合材料显示比G填充复合材料和整齐混合物更高的结晶速率系数值，从而提供更好的结晶能力和与基质的混溶性。总之，观察到填充的混合复合材料显示用于热管理应用的可持续材料的可能性。 （c）2018 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,47387。

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