一种可通用的反应性混合策略,用于制造阻燃性,机械强度和硬化多 (L-乳酸) 生物塑料
Zimeng Zhang1, Siqi Huo2, Lingfeng Yu1
1Hubei Engineering Technology Research Center of Optoelectronic and New Energy Materials, School of Materials Science & Engineering, Wuhan Institute of Technology, Wuhan 430205, China.
International journal of biological macromolecules
|March 14, 2024
概括
本研究介绍了一种无溶剂的方法,用于制造强,坚固和阻燃的聚-乳酸 (PLA) 复合材料. 新材料PLA/2GH提高了机械性能,并获得了V-0 UL-94评级.
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
- 复合材料 复合材料 复合材料
背景情况:
- 聚L-乳酸 (PLA) 是一种具有良好的机械强度的可生物降解塑料,但具有易燃性和低性.
- 现有的改善PLA性能的方法通常使用有机溶剂,可以降低机械强度,但无法解决易燃性.
研究的目的:
- 开发一种无溶剂的方法来制造强,坚固和阻燃的聚-乳酸 (PLA) 复合材料.
- 研究将含/含的聚氨片段纳入PLA对其机械和阻燃性能的影响.
主要方法:
- 聚L-乳酸 (PLA) 与6-双 (2-基乙基) 氨基) 甲基) 双 [c,e] [1,2]氧酸6-氧化物 (DHDP) 和二甲二酸盐 (MDI) 的反应性混合.
- 制造PLA/xGH复合材料,其中x表示-NCO与-OH组的摩尔比,在没有有机溶剂的情况下实现.
- 由此产生的复合材料的机械性能 (拉伸强度,冲击强度) 和阻燃性 (UL-94,LOI) 的表征.
主要成果:
- 具有1.02:1的-NCO/-OH摩尔比率的PLA/2GH,保持了63.0MPa的高抗拉强度.
- 与纯PLA相比,PLA/2GH的冲击强度增加了23.4%,这归因于刚性聚氨部分.
- 在垂直燃烧测试 (UL-94) 中,PLA/2GH获得了V-0评级,氧气限制指数 (LOI) 为29.8%,表明了出色的阻燃性.
结论:
- 为了生产增强的PLA生物塑料,证明了一种可泛化,无溶剂的策略.
- 在现场形成含/的聚氨片段,有效地提高了PLA的机械性能和阻燃性.
- 开发的PLA/2GH复合材料为制造高性能,阻燃生物塑料提供了一个有前途的解决方案.
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