高模量和强度的聚氨薄膜是从不同含量和NCO/OH摩尔比的基聚合物合成的
Yujie Zhang1, Changjian Wang2, Jun Liang1
1State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
International journal of biological macromolecules
|November 21, 2024
概括
在这项研究中,从Kraft木素合成了木素多聚 (LP),从而获得了高产量. 由此产生的LP基聚氨薄膜表现出可调节的机械性能和疏水性,突出显示了木质素.
科学领域:
- 聚合物科学 聚合物科学
- 材料科学 材料科学 材料科学
- 生物质的价值化 生物质的价值化
背景情况:
- 实力木质素是纸和造纸工业丰富的副产品.
- 的价值化对于开发可持续材料和循环经济至关重要.
- 从可再生资源开发高性能聚合物是一个活跃的研究领域.
研究的目的:
- 通过Kraft的液化合成素多聚 (LP).
- 为了制造和表征LP基聚氨薄膜 (LP-PUF).
- 调查素含量和NCO/OH比对LP-PUF的机械性能,疏水性和热性行为的影响.
主要方法:
- 使用聚乙烯糖醇和糖醇液化卡夫特木质素生产LP.
- 制造LP-PUF通过与六甲基二酸反应LP.
- 通过调整NCO/OH摩尔比率来优化LP-PUF的性能.
- 机械性能 (拉力强度,扬模),疏水性 (水接触角度,表面自由能量) 和热性能 (玻璃过渡温度) 的表征.
主要成果:
- 对LP23 (97.43%) 和LP41 (93.75%) 实现了高的液化产量.
- LP-PUF表现出可调节的机械强度和模块,LP23-PUF1.9达到34.28MPa的抗拉强度和233.27MPa的Young模块.
- LP23-PUF2.0表现出显著的疏水性 (96.8°水接触角度) 和较低的表面自由能量 (15.68 mN/m).
- 增加的红素含量显著提高了LP-PUF的玻璃化过渡温度 (Tg) 8°C.
结论:
- 宁聚醇可以有效地合成,产量高.
- LP-PUF提供可调整的机械和疏水性能,适合各种应用.
- 素的加入增强了聚氨薄膜的模量和强度.
- 这项研究为利用红素作为高性能聚氨材料的结构部件提供了宝贵的见解.
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