智能聚合物用于多功能应用:机械和电气方面
Mohammad Rauf Sheikhi1,2,3, Selim Gürgen4
1Key Laboratory of Traffic Safety on Track of Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha 410075, China.
Polymers
|June 28, 2023
概括
这项研究用碳纳米管 (CNT) 强化剪切加厚聚合物 (STP),以创建智能材料. 由此产生的STP-CNT复合材料表现出增强的机械性能和电导率.
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
- 纳米技术纳米技术
背景情况:
- 具有可调节的机械和电气性能的智能材料对于先进的应用至关重要.
- 剪切加厚聚合物 (STP) 具有独特的应力反应,在剪切下增加粘度.
- 碳纳米管 (CNT) 以其卓越的机械和电气性能而闻名.
研究的目的:
- 通过用 CNT 填充剂加强 STP 来制造和表征智能材料.
- 研究不同度的CNT对STP的机械和电气行为的影响.
- 评估开发的复合材料的多功能能力,包括电导率和刚性.
主要方法:
- 制造STP-CNT复合材料,其中CNT负载高达3.5%的重量.
- 使用动态机械分析 (DMA),形状稳定性和自由落体测试进行机械性能评估.
- 通过电阻测量进行电气性质评估.
主要成果:
- CNT填充剂增强了弹性性质,并在较低频率的STP中启动了硬化行为.
- 观察到形状稳定性增加,CNTs有效地阻碍了冷流.
- 由于纳入了CNT,STP-CNT复合材料获得了电导性.
结论:
- CNT增强显著提高了机械性能,并为剪切加厚聚合物引入了电导率.
- 开发的STP-CNT复合材料提供了适合智能材料应用的多功能特性.
- 这项研究展示了一种可行的方法,用于创建具有定制特性的先进智能材料.
相关概念视频
02:34Polymers
21.0K
21.0K
01:14Polymer Classification: Architecture
2.8K
Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
2.8K
01:26Polymer Classification: Stereospecificity
2.5K
Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
2.5K