3-硅羟基-1-丙基磺酸 / 聚氧乙烯十八烷基胺为外壳的可流动碳纳米管的制备与性能

基金项目: 国家自然科学基金项目(51073129,51373137).

Synthesis and properties of a solvent-free MWCNT-based nanofluid

Contemporary Design and Integrated Manufacturing Technology Key Laboratory of the Ministry of Education, Northwestern Polytechnical University, Xi忆an 710072, China|

摘要: 采用 3-硅羟基-1-丙基磺酸(SIT8378. 3)和聚氧乙烯十八烷基胺(Ethomeen18/25)在酸化多壁纳米碳管表面上生成长链壳层,相当于“溶剂”, 使碳纳米管在没有溶剂时,损耗模量 G″高于储能模量 G′, 具有流体特性。结果表明,长链分子接枝于碳纳米管表面使碳纳米管的直径增大,碳纳米管质量分数为 16. 03%。碳纳米管在去离子水中稳定分散,渗流阈值为 5 mg/ g。
- 碳纳米管 /
- 无溶剂纳米流体 /
- 固鄄液转变 /
- 流变性能
Abstract: Carboxylic-acid functionalized multiwall carbon nanotubes ( MWCNT-COOH) were first modified by ( CH₃O)₃Si (CH₂)₃SO₃H by an esterification reaction of the carboxylic-acid group with a methoxy group, then by hydrolyzing N, N-di(2-hydroxyethoxy)ethyl octadecylamine by an ion exchange reaction to form a quaternary ammonium salt as a soft shell of the MWC-NTs. The modified MWCNTs had a larger diameter than the original MWCNTs and their MWCNT content was up to 16. 03 wt %. The loss modulus of the modified MWCNTs is bigger than the storage modulus, which is a characteristic of a solvent-free nanofluid. The modified MWNTs can be well dispersed in deionized water and the resulting dispersion is stable. Their seepage threshold value in water is about 5 mg/ g.
- Carbon nanotubes /
- Solvent-free nanofluids /
- Solid-liquid behaves /
- Rheology