Nanoscale to Macroscale Characterization of in—Situ Bacterial Biopolymers for Applications in Soil Stabilization
Bacterial biopolymers produced extracellularly due to microbial metabolic activities have gained considerable interest in various engineering applications. The major advantages of bacterial biopolymers is their in-situ production and low water solubility, eliminating the requirement for mixing in gr...
| Main Authors: | , , |
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| Format: | Journal Article |
| Language: | English |
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FRONTIERS MEDIA SA
2022
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| Online Access: | http://hdl.handle.net/20.500.11937/88265 |
| _version_ | 1848764995285811200 |
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| author | Ramachandran, Asha Latha Mukherjee, Abhijit Dhami, Navdeep |
| author_facet | Ramachandran, Asha Latha Mukherjee, Abhijit Dhami, Navdeep |
| author_sort | Ramachandran, Asha Latha |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Bacterial biopolymers produced extracellularly due to microbial metabolic activities have gained considerable interest in various engineering applications. The major advantages of bacterial biopolymers is their in-situ production and low water solubility, eliminating the requirement for mixing in granular substrates such as soils. These properties make them highly desirable and preferable to manufactured biopolymers. But for any engineering applications, it is crucial to understand the mechanical properties of these materials, which have been less explored. This investigation is the first attempt to quantify the nano and macro mechanical properties of in-situ bacterial biopolymer dextran produced by bacterial culture Leucononstoc mesenteroids. The fundamental mechanism of bacterial biopolymer-based cementation has been revealed through their morphographic and nanomechanical testing via atomic force microscopy, nanoindentation and scanning electron micrographs. The effect of bacterially produced biopolymers and commercial biopolymers on the macro-mechanical properties of soils was then investigated via needle penetration tests. In-situ biopolymers were found to be highly effective in stabilizing soils with comparable mechanical properties as commercial biopolymers. This study has demonstrated novel methods for testing in situ polymers and opened up the channels for their applications in numerous subsurface as well as surface applications. |
| first_indexed | 2025-11-14T11:28:13Z |
| format | Journal Article |
| id | curtin-20.500.11937-88265 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:28:13Z |
| publishDate | 2022 |
| publisher | FRONTIERS MEDIA SA |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-882652022-05-05T06:09:35Z Nanoscale to Macroscale Characterization of in—Situ Bacterial Biopolymers for Applications in Soil Stabilization Ramachandran, Asha Latha Mukherjee, Abhijit Dhami, Navdeep Science & Technology Technology Materials Science, Multidisciplinary Materials Science biopolymers bacterial dextran nanoindentation AFM needle penetration SCALE MECHANICAL-PROPERTIES DEXTRAN NANOINDENTATION MULTISCALE STRAINS SIZE Bacterial biopolymers produced extracellularly due to microbial metabolic activities have gained considerable interest in various engineering applications. The major advantages of bacterial biopolymers is their in-situ production and low water solubility, eliminating the requirement for mixing in granular substrates such as soils. These properties make them highly desirable and preferable to manufactured biopolymers. But for any engineering applications, it is crucial to understand the mechanical properties of these materials, which have been less explored. This investigation is the first attempt to quantify the nano and macro mechanical properties of in-situ bacterial biopolymer dextran produced by bacterial culture Leucononstoc mesenteroids. The fundamental mechanism of bacterial biopolymer-based cementation has been revealed through their morphographic and nanomechanical testing via atomic force microscopy, nanoindentation and scanning electron micrographs. The effect of bacterially produced biopolymers and commercial biopolymers on the macro-mechanical properties of soils was then investigated via needle penetration tests. In-situ biopolymers were found to be highly effective in stabilizing soils with comparable mechanical properties as commercial biopolymers. This study has demonstrated novel methods for testing in situ polymers and opened up the channels for their applications in numerous subsurface as well as surface applications. 2022 Journal Article http://hdl.handle.net/20.500.11937/88265 10.3389/fmats.2021.681850 English http://creativecommons.org/licenses/by/4.0/ FRONTIERS MEDIA SA fulltext |
| spellingShingle | Science & Technology Technology Materials Science, Multidisciplinary Materials Science biopolymers bacterial dextran nanoindentation AFM needle penetration SCALE MECHANICAL-PROPERTIES DEXTRAN NANOINDENTATION MULTISCALE STRAINS SIZE Ramachandran, Asha Latha Mukherjee, Abhijit Dhami, Navdeep Nanoscale to Macroscale Characterization of in—Situ Bacterial Biopolymers for Applications in Soil Stabilization |
| title | Nanoscale to Macroscale Characterization of in—Situ Bacterial Biopolymers for Applications in Soil Stabilization |
| title_full | Nanoscale to Macroscale Characterization of in—Situ Bacterial Biopolymers for Applications in Soil Stabilization |
| title_fullStr | Nanoscale to Macroscale Characterization of in—Situ Bacterial Biopolymers for Applications in Soil Stabilization |
| title_full_unstemmed | Nanoscale to Macroscale Characterization of in—Situ Bacterial Biopolymers for Applications in Soil Stabilization |
| title_short | Nanoscale to Macroscale Characterization of in—Situ Bacterial Biopolymers for Applications in Soil Stabilization |
| title_sort | nanoscale to macroscale characterization of in—situ bacterial biopolymers for applications in soil stabilization |
| topic | Science & Technology Technology Materials Science, Multidisciplinary Materials Science biopolymers bacterial dextran nanoindentation AFM needle penetration SCALE MECHANICAL-PROPERTIES DEXTRAN NANOINDENTATION MULTISCALE STRAINS SIZE |
| url | http://hdl.handle.net/20.500.11937/88265 |