Dehnou Kianoush Hatami, Norouzi Ghazal Saki, Majidipour Marzieh
Department of Materials Science and Engineering, School of Engineering, Shiraz University Shiraz Iran
Chemical Engineering Department, Faculty of Engineering, Razi University Iran
RSC Adv. 2023 Jan 27;13(6):3976-4006. doi: 10.1039/d2ra07011a. eCollection 2023 Jan 24.
Polylactic acid (PLA) is a linear aliphatic polyester thermoplastic made from renewable sources such as sugar beet and cornstarch. Methods of preparation of polylactic acid are biological and chemical. The advantages of polylactic acid are biocompatibility, easily processing, low energy loss, transparency, high strength, resistance to water and fat penetration and low consumption of carbon dioxide during production. However, polylactic acid has disadvantages such as hydrophobicity, fragility at room temperature, low thermal resistance, slow degradation rate, permeability to gases, lack of active groups and chemical neutrality. To overcome the limitations of PLA, such as low thermal stability and inability to absorb gases, nanoparticles such as graphene are added to improve its properties. Extensive research has been done on the introduction of graphene nanoparticles in PLA, and all of these studies have been studied. In this study, we intend to study a comprehensive study of the effect of graphene nanoparticles on the mechanical, thermal, structural and rheological properties of PLA/Gr nanocomposites and also the effect of UV rays on the mechanical properties of PLA/Gr nanocomposites.
聚乳酸（PLA）是一种由甜菜和玉米淀粉等可再生资源制成的线性脂肪族聚酯热塑性塑料。聚乳酸的制备方法有生物法和化学法。聚乳酸的优点包括生物相容性、易于加工、低能量损耗、透明度高、强度高、耐水和耐脂肪渗透以及生产过程中二氧化碳消耗量低。然而，聚乳酸也有一些缺点，如疏水性、室温下易碎、耐热性低、降解速率慢、气体渗透性、缺乏活性基团和化学中性。为了克服聚乳酸的局限性，如低热稳定性和无法吸收气体，会添加石墨烯等纳米颗粒来改善其性能。关于在聚乳酸中引入石墨烯纳米颗粒已经进行了广泛的研究，并且所有这些研究都已被探讨过。在本研究中，我们打算全面研究石墨烯纳米颗粒对聚乳酸/石墨烯（PLA/Gr）纳米复合材料的机械、热、结构和流变性能的影响，以及紫外线对聚乳酸/石墨烯纳米复合材料机械性能的影响。
