| Author | Sadek, Mohammad Al-Amin |
| Call Number | AIT Thesis no.AE-08-06 |
| Subject(s) | Tillage--Research
|
| Note | A thesis submitted in partial fulfillment of the re quirements for the degree of Master of Engineering in Agricultural Systems and Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. AE-08-06 |
| Abstract | In soil–tool interaction, one of the most important characteristics for tillage tools is its adhesion with soil mass, which reduces the overall tillage performance. The adhesion occurs due the continuous water film in between soi l and the tillage tool. One of the basic ideas is that the hydrophobic tool surfaces can red uce the soil adhesive or sliding frictional forces. The “lotus leaf effect” is one of the great est phenomena of nature for purely hydrophobic surface. Nanotechnology has been capabl e of producing closest solutions to create such a surface with its self organizing prop erty. This study aimed to evaluate how the nanosurfaces c ould contribute reducing the draft forces through well-arranged experimental design. I n order to achieve this goal, four different types of surfaces were created on a simpl e flat tine including flat surface grinding (without any coating), nanopaint, enamel coated and surface coating by nanoparticles. The surface performance characteristics including wear were tested for soil-tool adhesion, sliding resistance, horizontal (draft) and vertical force in sand, dry soil and wet soil conditions. The highest roughness was found in enam el coated 0.58 μ m and lowest in nanopaint 0.066 μ m which were less and highly hydrophobic respective ly. The adhesion force was changed from 61% to 36% for enamel coated , 20% to -6% for nanopaint and 32% to 16% for nanosurface compare to the control t ine surface depending on the soil moisture content and similar result was obtained fo r sliding resistance for different loading conditions. Wear rate was highest in nanosurface wh ile enamel coated was found lowest. Enamel coated and nanopaint had less wear in wet so il condition compare to other soil conditions and tine surfaces. No significant differ ence in draft and vertical forces was found among all surface conditions in sand and dry soils. The nanopaint coated surface performed better than others in wet soil while nano surface poorly performed in wet soil condition. The draft force in nanopaint coated tine was different with respect to the control tine at plastic and sticky limit conditions, for ra ke 90 0 tine -8.15, -5.80%; for rake 50 0 tine - 46.11, 2.2% respectively. The variation was more in draft force and was less in vertical component in all conditions. The study revealed tha t the nanotechnology can be a good solution for improving surface features to reduce s oil-tool adhesion especially under moist soil conditions. |
| Year | 2008 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AE-08-06 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Jayasuriya, H. P. W. |
| Examination Committee(s) | Soni, Peeyush;Dutta, Joydeep;Salokhe, Vilas M. |
| Scholarship Donor(s) | Norway |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2008 |