Single bacteria spore encapsulation through layer-by-layer self-assembly of poly(dimethyldiallyl ammonium chloride) and silica nanoparticles for self-healing concrete
Self-healing of cracks improves durability and reduces maintenance of concrete. Microbial induced calcite precipitation is a novel approach to engage self-healing in concrete, and bacteria spores are protected from direct contact with the surrounding cement matrix to maintain their viability. This s...
| Main Authors: | , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/170169 |
| _version_ | 1826122394488537088 |
|---|---|
| author | Xiao, Xi Unluer, Cise Chu, Shaohua Yang, En-Hua |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Xiao, Xi Unluer, Cise Chu, Shaohua Yang, En-Hua |
| author_sort | Xiao, Xi |
| collection | NTU |
| description | Self-healing of cracks improves durability and reduces maintenance of concrete. Microbial induced calcite precipitation is a novel approach to engage self-healing in concrete, and bacteria spores are protected from direct contact with the surrounding cement matrix to maintain their viability. This study proposes a novel single bacteria spore capsule via layer-by-layer (LbL) self-assembly of poly(dimethyldiallyl ammonium chloride) and silica nanoparticles to enhance the consistency of healing as well as to minimize the negative impact on the mechanical properties of the resulting concrete. The resulting single bacteria spore capsule has a size of 1 μm and the inclusion of the capsules dose not compromise the compressive strength of the matrix. Cement paste incorporating the capsules shows complete closure of large crack of few hundred microns and complete recovery of transport property. Healing products are observed along the entire crack from the surface to the interior. |
| first_indexed | 2024-10-01T05:47:27Z |
| format | Journal Article |
| id | ntu-10356/170169 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:47:27Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1701692023-08-30T03:36:01Z Single bacteria spore encapsulation through layer-by-layer self-assembly of poly(dimethyldiallyl ammonium chloride) and silica nanoparticles for self-healing concrete Xiao, Xi Unluer, Cise Chu, Shaohua Yang, En-Hua School of Civil and Environmental Engineering Engineering::Civil engineering Bacteria Capsule Self-healing of cracks improves durability and reduces maintenance of concrete. Microbial induced calcite precipitation is a novel approach to engage self-healing in concrete, and bacteria spores are protected from direct contact with the surrounding cement matrix to maintain their viability. This study proposes a novel single bacteria spore capsule via layer-by-layer (LbL) self-assembly of poly(dimethyldiallyl ammonium chloride) and silica nanoparticles to enhance the consistency of healing as well as to minimize the negative impact on the mechanical properties of the resulting concrete. The resulting single bacteria spore capsule has a size of 1 μm and the inclusion of the capsules dose not compromise the compressive strength of the matrix. Cement paste incorporating the capsules shows complete closure of large crack of few hundred microns and complete recovery of transport property. Healing products are observed along the entire crack from the surface to the interior. Ministry of Education (MOE) The authors acknowledge the financial support from the Singapore MOE Academic Research Fund Tier 2 (MOE2017-T2-1-087 (S)). 2023-08-30T03:36:01Z 2023-08-30T03:36:01Z 2023 Journal Article Xiao, X., Unluer, C., Chu, S. & Yang, E. (2023). Single bacteria spore encapsulation through layer-by-layer self-assembly of poly(dimethyldiallyl ammonium chloride) and silica nanoparticles for self-healing concrete. Cement and Concrete Composites, 140, 105105-. https://dx.doi.org/10.1016/j.cemconcomp.2023.105105 0958-9465 https://hdl.handle.net/10356/170169 10.1016/j.cemconcomp.2023.105105 2-s2.0-85153582848 140 105105 en MOE2017-T2-1-087 (S) Cement and Concrete Composites © 2023 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Civil engineering Bacteria Capsule Xiao, Xi Unluer, Cise Chu, Shaohua Yang, En-Hua Single bacteria spore encapsulation through layer-by-layer self-assembly of poly(dimethyldiallyl ammonium chloride) and silica nanoparticles for self-healing concrete |
| title | Single bacteria spore encapsulation through layer-by-layer self-assembly of poly(dimethyldiallyl ammonium chloride) and silica nanoparticles for self-healing concrete |
| title_full | Single bacteria spore encapsulation through layer-by-layer self-assembly of poly(dimethyldiallyl ammonium chloride) and silica nanoparticles for self-healing concrete |
| title_fullStr | Single bacteria spore encapsulation through layer-by-layer self-assembly of poly(dimethyldiallyl ammonium chloride) and silica nanoparticles for self-healing concrete |
| title_full_unstemmed | Single bacteria spore encapsulation through layer-by-layer self-assembly of poly(dimethyldiallyl ammonium chloride) and silica nanoparticles for self-healing concrete |
| title_short | Single bacteria spore encapsulation through layer-by-layer self-assembly of poly(dimethyldiallyl ammonium chloride) and silica nanoparticles for self-healing concrete |
| title_sort | single bacteria spore encapsulation through layer by layer self assembly of poly dimethyldiallyl ammonium chloride and silica nanoparticles for self healing concrete |
| topic | Engineering::Civil engineering Bacteria Capsule |
| url | https://hdl.handle.net/10356/170169 |
| work_keys_str_mv | AT xiaoxi singlebacteriasporeencapsulationthroughlayerbylayerselfassemblyofpolydimethyldiallylammoniumchlorideandsilicananoparticlesforselfhealingconcrete AT unluercise singlebacteriasporeencapsulationthroughlayerbylayerselfassemblyofpolydimethyldiallylammoniumchlorideandsilicananoparticlesforselfhealingconcrete AT chushaohua singlebacteriasporeencapsulationthroughlayerbylayerselfassemblyofpolydimethyldiallylammoniumchlorideandsilicananoparticlesforselfhealingconcrete AT yangenhua singlebacteriasporeencapsulationthroughlayerbylayerselfassemblyofpolydimethyldiallylammoniumchlorideandsilicananoparticlesforselfhealingconcrete |