多种材料纤维和薄膜通过聚合物冷进行控制的碎片化
Soroush Shabahang1, Guangming Tao1, Joshua J Kaufman1
1CREOL, The College of Optics &Photonics, University of Central Florida, Orlando, Florida 32816, USA.
Nature
|June 10, 2016
概括
聚合物冷可控地将多材料纤维中的脆性核心碎片化为均的棒. 这种由机械不稳定驱动的过程使材料科学和纳米技术中的新应用成为可能.
科学领域:
- 材料科学
- 聚合物科学
- 纳米技术
背景情况:
- 聚合物冷是一种制造强纤维的工业工艺,
- 它对复合结构的应用,特别是性矩阵中的脆性核心,仍未得到充分研究.
研究的目的:
- 研究冷对具有脆性核心的多材料纤维的影响.
- 展示嵌入式结构的可控碎片化,并探索潜在的应用.
主要方法:
- 多种材料纤维 (脆芯,柔性层) 和薄膜的冷.
- 分析机械-几何不稳定的非线性有限元素模拟.
- 探索各种材料组合,包括,黄金,玻璃和聚合物.
主要成果:
- 实现可控制的,顺序的碎裂脆的核心成均大小的棒.
- 证明了脆薄膜的碎片化成对齐的平行条带.
- 观察到横向尺度和纵向断裂周期之间的线性关系.
结论:
- 由于机械-几何不稳定性,冷拉引发嵌入的脆性材料的可预测碎片化.
- 这种方法可以制造具有伪装和生物检测应用潜力的结构材料.
- 该工艺是多功能,适用于各种材料和几何形状,并提供自我修复能力.
相关概念视频
01:20Types of Step-Growth Polymers: Polyesters
2.6K
The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the polymer...
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the polymer...
2.6K
01:21Polymer Classification: Crystallinity
4.2K
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
4.2K