Rice husk/glass fiber-reinforced poly(lactic acid) hybrid composites: rheological and dynamic mechanical study

IF 2.4 3区 化学 Q3 POLYMER SCIENCE
Mustafa Kuyumcu, Gokce Kurt, Alper Kasgoz, Mehmet Atilla Tasdelen
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Abstract

This study explores the effects of incorporating rice husk, glass fiber, and a POE-g-Mah(ethylene–octene copolymer functionalized with maleic anhydride) compatibilizer on the properties of poly(lactic acid) (PLA)-based composites. Through SEM analyses, it is observed that enhanced filler dispersion and interfacial bonding between the PLA matrix and fillers with POE-g-Mah result in improved composite compatibility. The rheological percolation threshold of the rice husk is determined above 30% for the samples containing only PLA and rice husk; however, it is determined between 20 and 30% for the samples containing the POE-g-Mah. The incorporation of POE-g-Mah into the polymer phase causes much higher modulus values compared to its counterparts with the same filler concentration. The DMA results revealed significant enhancements in the modulus of elasticity and damping properties when rice husk and glass fiber were added. The composite with 20% (by weight) rice husk and 5% (by weight) compatibilizer doubled its elastic modulus at 40 °C and increased fivefold to 65 °C with an additional 15% (by weight) glass fiber. This modification substantially reduced energy dissipation and improved damping performance and dimensional stability, which was also evidenced by a decrease in thermal expansion. These findings imply the potential of using rice husk, glass fiber, and POE-g-Mah to significantly enhance the mechanical and thermal properties, offering valuable insights for developing high-performance sustainable materials.

Graphical abstract

Abstract Image

稻壳/玻璃纤维增强聚(乳酸)混合复合材料:流变学和动态力学研究
本研究探讨了加入稻壳、玻璃纤维和 POE-g-Mah(马来酸酐官能化的乙烯-辛烯共聚物)相容剂对聚乳酸(PLA)基复合材料性能的影响。通过 SEM 分析发现,POE-g-Mah 增强了填料的分散性以及聚乳酸基体与填料之间的界面结合,从而提高了复合材料的相容性。在仅含聚乳酸和稻壳的样品中,稻壳的流变渗流阈值高于 30%;而在含 POE-g-Mah 的样品中,该阈值在 20% 至 30% 之间。在聚合物相中掺入 POE-g-Mah 会导致模量值大大高于具有相同填料浓度的同类样品。DMA 结果表明,添加稻壳和玻璃纤维后,弹性模量和阻尼特性明显提高。添加 20% (重量)稻壳和 5% (重量)相容剂的复合材料在 40 °C 时的弹性模量增加了一倍,而添加 15% (重量)玻璃纤维后,弹性模量在 65 °C 时增加了五倍。这种改性大大降低了能量耗散,改善了阻尼性能和尺寸稳定性,热膨胀率的降低也证明了这一点。这些研究结果表明,稻壳、玻璃纤维和 POE-g-Mah 具有显著提高机械和热性能的潜力,为开发高性能可持续材料提供了宝贵的启示。
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来源期刊
Iranian Polymer Journal
Iranian Polymer Journal 化学-高分子科学
CiteScore
4.90
自引率
9.70%
发文量
107
审稿时长
2.8 months
期刊介绍: Iranian Polymer Journal, a monthly peer-reviewed international journal, provides a continuous forum for the dissemination of the original research and latest advances made in science and technology of polymers, covering diverse areas of polymer synthesis, characterization, polymer physics, rubber, plastics and composites, processing and engineering, biopolymers, drug delivery systems and natural polymers to meet specific applications. Also contributions from nano-related fields are regarded especially important for its versatility in modern scientific development.
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