期刊
MECHANICS OF MATERIALS
卷 132, 期 -, 页码 57-65出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.mechmat.2019.02.013
关键词
Methyl cellulose hydrogels; Thermoreversible gelation; Mechanical properties; Static compression; Dynamic compression; Nano-particles
资金
- Technion Security Science and Technology Center [2024374]
Methylcellulose hydrogels are attracting considerable interest due to their unique thereto-reversible gelation. The present work focuses on the attempt to tune, control and improve the mechanical response of these hydrogels by using silica (SiO2), alumina (Al2O3) and boron carbide (B4C) particles, while preserving their ability to thermogelate. A systematic experimental study reveals the dependence of the flow stress of the hydrogel-composite on the type and size of particle additive. Methylcellulose composite hydrogels also show increased flow-stress dependence on temperature, compared to the parent hydrogel. Similarly, some of these novel composite exhibit very high strain-rate sensitivity, with up to 90 times increase of strength in the dynamic regime. Thus, the present study offers simple tools to fete-tune the mechanical properties of these highly applicable methylcellulose hydrogels, by using small amounts of additives. Of the studied composites, the best results for dynamic flow-stress increase were achieved with nanometric boron carbide particles. This could be due to the large surface area for interaction with the methylcellulose and with the particles serving as heterogenic focal points for phase-transition.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据