基于多聚胺和高小麦草的生物复合材料的热和机械性能
Cezary Gozdecki1, Krzysztof Moraczewski1, Marek Kociszewski1
1Faculty of Materials Engineering, Kazimierz Wielki University in Bydgoszcz, ul. Chodkiewicza 30, 85-064 Bydgoszcz, Poland.
Materials (Basel, Switzerland)
|November 14, 2023
概括
这项研究探讨了用高小麦草 (TWG) 和大麻 (H) 填充剂的聚乳酸 (PLA) 生物复合材料. 增加填料含量提高了模量,但降低了强度和耐热性,TWG和H具有不同的性能配置.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 生物复合材料是一种生物复合材料.
背景情况:
- 生物复合材料为传统塑料提供了可持续的替代品.
- 聚乳酸 (PLA) 是一种具有越来越多应用的可生物降解聚合物.
- 如高小麦草 (TWG) 和大麻 (H) 等农业基填充剂正在研究以增强PLA特性.
研究的目的:
- 研究不同的农用填充剂含量 (TWG和H) 对PLA生物复合材料的热和机械性能的影响.
- 了解这些天然填料对PLA结晶行为的影响.
- 为了比较TWG和H作为PLA中的填充剂的性能.
主要方法:
- 生物复合材料是使用聚乳酸 (PLA) 结合高小麦草 (TWG) 和大麻 (H) 填充物通过注射成型来制造的.
- 用差分扫描热量测量 (DSC),动态机械分析 (DMA) 和热重力测量分析 (TG) 分析了热性能.
- 评估了机械性能,包括拉力模量,拉力强度和冲击强度.
主要成果:
- 整合植物填充剂通常会降低PLA复合材料的热阻.
- 填充剂作为核化剂,显著影响了PLA的冷结晶.
- 随着填充剂的含量增加,储存模块增加了,在填充剂负载为50%时显示118%的增加.
- 使用50%的填充剂,拉伸模量翻了一番,而拉伸强度和冲击强度分别下降了23%和70%.
- 与H复合材料相比,TWG复合材料的拉力模量略高,但强度和抗冲击能力略低.
结论:
- 农用填充剂的含量对PLA生物复合材料的热性能和机械性能产生了重大影响.
- 虽然填充剂增强了刚性 (模块),但它们损害了热稳定性和性.
- TWG和H提供了不同的性能修改,为定制生物复合材料开发提供了选择.
相关概念视频
01:28Classification and Mechanical Properties of Synthetic Polymers
Synthetic polymers are classified as elastomers, fibers, or plastics based on their crystallinity. Crystallinity, the degree of long-range order in the solid state, influences the mechanical properties (stretching or contracting) of elastomers. Elastomers are flexible polymers that can expand or contract easily upon the application of an external force. They have numerous crosslinks that pull them back into their original shape when stress is removed. Silicones, for instance, are highly elastic...
01:27Bioplastics
Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...