Mechanisms and Critical Technologies of Transport Inhibitor Agent (TIA) throughout C-S-H Nano-Channels
The critical issue of the durability of marine concrete lies in the continuous penetration and rapid enrichment of corrosive ions. Here a new ion transfer inhibitor, as TIA, with calcium silicate hydrate (C-S-H) interfacial affinity and hydrophobicity is proposed through insights from molecular dyna...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-01-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/15/2/515 |
| _version_ | 1797492425293299712 |
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| author | Qi Luo Jiale Huang |
| author_facet | Qi Luo Jiale Huang |
| author_sort | Qi Luo |
| collection | DOAJ |
| description | The critical issue of the durability of marine concrete lies in the continuous penetration and rapid enrichment of corrosive ions. Here a new ion transfer inhibitor, as TIA, with calcium silicate hydrate (C-S-H) interfacial affinity and hydrophobicity is proposed through insights from molecular dynamics into the percolation behavior of the ion solution in C-S-H nano-channels and combined with molecular design concepts. One side of the TIA can be adsorbed on the surface of the cement matrix and can form clusters of corrosive ions to block the gel pores so as to resist the ion solution percolation process. Its other side is structured as a hydrophobic carbon chain, similar to a door hinge, which can stick to the matrix surface smoothly before the erosion solution is percolated. It can then change into a perpendicular chain shape to reduce the percolation channel’s diameter and thereby inhibit the percolation when ions meet the inhibitor. Therefore, once the erosion solution contacts TIA, it can quickly chelate with calcium ions and erosion ions at the interface to form clusters and compact pores. In addition, the water absorption, chloride migration coefficient, and chloride content of concrete samples decreased significantly after adding TIA, proving that TIA can effectively enhance the durability of cement-based materials. The structure–activity relationship of ion transfer that is proposed can provide new ideas for solving the critical problems of durability of cement-based materials and polymer molecular design. |
| first_indexed | 2024-03-10T01:03:33Z |
| format | Article |
| id | doaj.art-656fb52063874f38b34b0fd47482a057 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T01:03:33Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-656fb52063874f38b34b0fd47482a0572023-11-23T14:30:22ZengMDPI AGMaterials1996-19442022-01-0115251510.3390/ma15020515Mechanisms and Critical Technologies of Transport Inhibitor Agent (TIA) throughout C-S-H Nano-ChannelsQi Luo0Jiale Huang1School of Materials Science and Engineering, Southeast University, Nanjing 211189, ChinaSchool of Materials Science and Engineering, Southeast University, Nanjing 211189, ChinaThe critical issue of the durability of marine concrete lies in the continuous penetration and rapid enrichment of corrosive ions. Here a new ion transfer inhibitor, as TIA, with calcium silicate hydrate (C-S-H) interfacial affinity and hydrophobicity is proposed through insights from molecular dynamics into the percolation behavior of the ion solution in C-S-H nano-channels and combined with molecular design concepts. One side of the TIA can be adsorbed on the surface of the cement matrix and can form clusters of corrosive ions to block the gel pores so as to resist the ion solution percolation process. Its other side is structured as a hydrophobic carbon chain, similar to a door hinge, which can stick to the matrix surface smoothly before the erosion solution is percolated. It can then change into a perpendicular chain shape to reduce the percolation channel’s diameter and thereby inhibit the percolation when ions meet the inhibitor. Therefore, once the erosion solution contacts TIA, it can quickly chelate with calcium ions and erosion ions at the interface to form clusters and compact pores. In addition, the water absorption, chloride migration coefficient, and chloride content of concrete samples decreased significantly after adding TIA, proving that TIA can effectively enhance the durability of cement-based materials. The structure–activity relationship of ion transfer that is proposed can provide new ideas for solving the critical problems of durability of cement-based materials and polymer molecular design.https://www.mdpi.com/1996-1944/15/2/515marine concretecapillary adsorptionTIAmolecular dynamicsC-S-H nano-channelshydrophobic |
| spellingShingle | Qi Luo Jiale Huang Mechanisms and Critical Technologies of Transport Inhibitor Agent (TIA) throughout C-S-H Nano-Channels Materials marine concrete capillary adsorption TIA molecular dynamics C-S-H nano-channels hydrophobic |
| title | Mechanisms and Critical Technologies of Transport Inhibitor Agent (TIA) throughout C-S-H Nano-Channels |
| title_full | Mechanisms and Critical Technologies of Transport Inhibitor Agent (TIA) throughout C-S-H Nano-Channels |
| title_fullStr | Mechanisms and Critical Technologies of Transport Inhibitor Agent (TIA) throughout C-S-H Nano-Channels |
| title_full_unstemmed | Mechanisms and Critical Technologies of Transport Inhibitor Agent (TIA) throughout C-S-H Nano-Channels |
| title_short | Mechanisms and Critical Technologies of Transport Inhibitor Agent (TIA) throughout C-S-H Nano-Channels |
| title_sort | mechanisms and critical technologies of transport inhibitor agent tia throughout c s h nano channels |
| topic | marine concrete capillary adsorption TIA molecular dynamics C-S-H nano-channels hydrophobic |
| url | https://www.mdpi.com/1996-1944/15/2/515 |
| work_keys_str_mv | AT qiluo mechanismsandcriticaltechnologiesoftransportinhibitoragenttiathroughoutcshnanochannels AT jialehuang mechanismsandcriticaltechnologiesoftransportinhibitoragenttiathroughoutcshnanochannels |