Surface Treatment of Carbon Nanotubes Using Modified Tapioca Starch for Improved Force Detection Consistency in Smart Cementitious Materials
| Autor: | Pan Lu, Gina Blazanin, Umma S. Rashid, Ying Huang, Leonard Chia, Senay Simsek, Achintya N. Bezbaruah |
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| Rok vydání: | 2020 |
| Předmět: |
amphiphilic co-polymer
Materials science force detection 0211 other engineering and technologies Mixing (process engineering) 02 engineering and technology Carbon nanotube smart cementitious materials lcsh:Chemical technology Biochemistry Article Analytical Chemistry Nanomaterials law.invention Pulmonary surfactant law 021105 building & construction lcsh:TP1-1185 Electrical and Electronic Engineering Composite material Instrumentation carbon nanotubes dispersion effectiveness 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics Surface coating Hysteresis modified tapioca starch Cementitious 0210 nano-technology Dispersion (chemistry) |
| Zdroj: | Sensors (Basel, Switzerland) Sensors Volume 20 Issue 14 Sensors, Vol 20, Iss 3985, p 3985 (2020) |
| ISSN: | 1424-8220 |
| Popis: | The remarkable mechanical properties and piezo-responses of carbon nanotubes (CNT) makes this group of nanomaterials an ideal candidate for use in smart cementitious materials to monitor forces and the corresponding structural health conditions of civil structures. However, the inconsistency in measurements is the major challenge of CNT-enabled smart cementitious materials to be widely applied for force detection. In this study, the modified tapioca starch co-polymer is introduced to surface treat the CNTs for a better dispersion of CNTs thus, to reduce the inconsistency of force measurements of the CNTs modified smart cementitious materials. Cement mortar with bare (unmodified) CNTs (direct mixing method) and surfactant surface treated CNTs using sodium dodecyl benzenesulfonate (NaDDBS) were used as the control. The experimental results showed that when compared with samples made from bare CNTs, the samples made by modified tapioca starch co-polymer coated CNTs (CCNTs) showed higher dynamic load induced piezo-responses with significantly improved consistency and less hysteresis in the cementitious materials. When compared with the samples prepared with the surfactant method, the samples made by the developed CCNTs showed slightly increased force detection sensitivity with significantly improved consistency in piezo-response and only minor hysteresis, indicating enhanced dispersion effectiveness. The new CNT surface coating method can be scaled up easily to cater the potential industry needs for future wide application of smart cementitious materials. |
| Databáze: | OpenAIRE |
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