以软骨为灵感的不均盐-水凝用于水合的减拉和应变传感
Yonggan Yan1, Yanping Shi2, Chenghu Liu2
1Department of Periodontology & Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases, Shandong University, Jinan 250012, China.
ACS applied materials & interfaces
|October 3, 2023
概括
研究人员开发了一种坚固,不均的盐水凝,灵感来自软骨. 这种材料表现出增强的机械强度,阻力降低和应变传感能力,为先进应用提供了潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 生物模拟学是一种生物模拟学.
- 聚合物化学 聚合物化学
背景情况:
- 关节软骨的不均结构提供承载能力和耐用性.
- 开发模仿自然结构的合成材料是材料科学的关键挑战.
研究的目的:
- 以关节软骨为灵感,创建一个坚固且不均的盐水凝.
- 为了研究开发的水凝的机械性能,阻力减小和应变传感能力.
主要方法:
- 通过捕获酸 (NaAc) 水晶合成聚烯胺 (PAM) 水凝.
- 部分重新溶解NaAc晶体,以创建一个不均的网络.
- 描述机械强度,温度依赖性,摩擦和导电性.
主要成果:
- 由于NaAc晶体的形成,盐水凝的压力和拉力应力增加了20倍以上.
- 机械强度取决于温度,晶体在更高的温度下重新溶解.
- 不同质的水凝证明了水化滑,阻力降低和光滑摩擦性能.
- 开发的盐-凝纤维显示出极好的耐用性和可重复性,用于应变传感 (1%至40%的应变).
结论:
- 不均的盐水凝模仿了软骨的特性,提供了增强的机械强度和耐用性.
- 该材料具有显著的应用潜力,可用于降低阻力和敏感应变检测.
- 这项工作为设计可调节的不均质网络的先进水凝提供了洞察力.
相关概念视频
02:02Responses to Salt Stress
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
01:24Carbonation Shrinkage
Atmospheric CO2 penetrates the concrete's pores and, in the presence of moisture, forms carbonic acid, which then reacts with calcium hydroxide in the hydrated cement, forming calcium carbonate. This process reduces the concrete's volume and is termed carbonation shrinkage.
The concrete's permeability is slightly reduced as calcium carbonate produced during the reaction fills its pores. Furthermore, its strength is slightly enhanced as the water released during the reaction facilitates the...
The concrete's permeability is slightly reduced as calcium carbonate produced during the reaction fills its pores. Furthermore, its strength is slightly enhanced as the water released during the reaction facilitates the...
01:22Effect of Sea Water on Concrete
Concrete exposed to seawater can undergo degradation like the dissolution of ettringite and gypsum, increasing the material's porosity and decreasing its strength. In contrast, the crystallization of salts within the concrete's pores can cause expansion, particularly above the waterline where evaporation occurs. Nonetheless, this expansion only happens when seawater, enabled by the concrete's permeability, manages to infiltrate the structure.
Concrete in areas between tide marks, which undergo...
Concrete in areas between tide marks, which undergo...