红素颗粒大小会影响PLA复合材料的性能,这些复合材料是通过in situ环开聚合制成的
Sofia P Makri1,2, Eleftheria Xanthopoulou2, Panagiotis A Klonos2,3
1Creative Nano PC, 43 Tatoiou, Metamorfosi, 14451 Athens, Greece.
Polymers
|January 8, 2025
概括
这项研究合成了基于生物的红素-多酸乳酸复合物,使用超声波波的木红素. 由此产生的材料显示出增强的机械性能,抗氧化活性和UV阻能力,由于强大的聚合物填充剂相互作用.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 生物复合材料是一种生物复合材料.
背景情况:
- 聚乳酸 (PLA) 是一种可生物降解的聚合物,其机械强度和热稳定性有限.
- 生物基填充剂,如素,提供了一条可持续的途径来增强聚合物特性.
研究的目的:
- 为了合成和表征新的生物基性木质素-多酸 (PLA) 复合物.
- 为了研究均的红素分散对复合材料性能的影响.
- 评估这些复合材料的机械,热,抗氧化和紫外线阻断性能.
主要方法:
- 从木中提取有机溶解的红素,并进行超声波,以减少颗粒大小 (~700 nm).
- 通过在位环开聚合 (ROP) 的L-乳化物制备PLA-烯酸复合物,其烯酸负载不同 (0.5,1.0,2.5 wt%).
- 描述包括FTIR,XPS,DSC和宽带介电光谱学 (BDS).
主要成果:
- 通过PLA链接接在素颗粒上实现了统一的素分散.
- 机械性能显著改善,拉伸强度和延伸度在1%重量%的金中增加了两倍.
- 抗氧化活性 (DPPH • 降低) 和紫外线阻断能力随着素含量增加.
结论:
- 在现场的ROP方法有效地创建具有增强功能的分散良好的木质素-PLA复合物.
- 这些生物基复合材料表现出改善的机械性能,抗氧化性能和紫外线保护.
- 该研究强调了素作为先进的PLA材料的可持续填充剂的潜力.
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