纤维素纳米晶的分散能力在不同分子量的聚酸盐中,这些聚酸盐是用二甲/二甲基硫氧化物溶剂制成的,用于电应用
Handan Palak1, Yavuz Akdevelioğlu2, Mohsen Alishahi3
1Istanbul Technical University, Faculty of Textile Technologies and Design, Department of Textile Engineering, Istanbul, Turkey; Fiber Science Program, Department of Human Centered Design, College of Human Ecology, Cornell University, Ithaca, NY, United States.
International journal of biological macromolecules
|November 6, 2024
概括
在聚酸纳米复合材料中的纤维素纳米晶散最好用较低分子量聚酸和更高的二甲基硫氧化物含量. 这改善了结晶性和纤维形成.
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
- 纳米技术纳米技术
背景情况:
- 聚酸 (PLA) 和纤维素纳米晶 (CNC) 纳米复合材料提供可调节的特性.
- 优化CNC分散对于提高纳米复合材料性能至关重要.
- 溶剂系统和聚合物分子量显著影响分散.
研究的目的:
- 调查聚乙烯分子量和溶剂混合比对PLA/CNC纳米复合材料中的CNC分散的影响.
- 分析CNC分散对纳米复合材料结晶,热降解和形态学的影响.
- 评估CNC分散对纳米复合材料纤维形成质量的影响.
主要方法:
- 用小振幅振荡剪切风湿学分析来评估CNC分散质量.
- 溶液造方法用于制备PLA/CNC纳米复合材料.
- 结晶行为,热降解和形态结构的特征.
主要成果:
- 与高分子量聚乙烯 (HPLA) 相比,低分子量聚乙烯 (LPLA) 的CNC分散性优越.
- 在二甲 (DCM) /DMSO混合物中增加的二甲基硫氧化物 (DMSO) 含量改善了CNC分散.
- 分散良好的CNC增强了PLA结晶性和精细纤维直径,达到大约1200nm,具有更均的结构.
- 100%的DCM和高DMSO含量 (50%v/v) 对纤维形成产生了负面影响.
结论:
- 聚酸的分子量和溶剂成分是实现PLA纳米复合材料中良好的CNC分散的关键因素.
- 优化的CNC分散对PLA的结晶和纤维形成特性产生了积极的影响.
- 这些发现为设计各种应用的高性能PLA/CNC纳米复合材料提供了洞察力.
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