Synthesis and Performance of Polycarboxylate Superplasticizer Based on a Novel Redox System of Manganese Dioxide/Acid
This study aims to develop a novel redox system based on manganese dioxide (MnO₂)/acid for synthesizing polycarboxylate superplasticizers (MPCE) via solution copolymerization of acrylic acid (AA) and methallyl polyoxyethylene ethers (TPEG). The performance of MPCE synthesized using MnO₂ combined wit...
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| Format: | Article |
| Language: | English |
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Kaunas University of Technology
2025-06-01
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| Series: | Medžiagotyra |
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| Online Access: | https://matsc.ktu.lt/index.php/MatSc/article/view/40831 |
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| author | Siyong CHENG Xintang WANG Si WU Luyan WANG |
| author_facet | Siyong CHENG Xintang WANG Si WU Luyan WANG |
| author_sort | Siyong CHENG |
| collection | DOAJ |
| description | This study aims to develop a novel redox system based on manganese dioxide (MnO₂)/acid for synthesizing polycarboxylate superplasticizers (MPCE) via solution copolymerization of acrylic acid (AA) and methallyl polyoxyethylene ethers (TPEG). The performance of MPCE synthesized using MnO₂ combined with different acids (citric acid, tartaric acid, oxalic acid) was compared with two conventional redox systems: ascorbic acid (VC)/H₂O₂ and ammonium persulfate. The MnO₂/citric acid system proved most effective, attributed to its one-step reaction to generate primary free radicals. Optimal reaction conditions were determined as a molar ratio of AA to TPEG (Mn=2400) of 3.5:1.0 and [MnO₂]:[citric acid] of 1:1. The longer side chains of MPCE enhanced adsorption on cement particles and dispersing performance via steric hindrance. Cement paste containing MPCE-2400 showed superior dispersing ability, retention capacity, clay resistance, and hardened mechanical properties. The findings highlight the critical role of the MnO₂/acid redox system in optimizing MPCE synthesis. |
| format | Article |
| id | doaj-art-58d1db3ab34044679bcc8cd99b5c705c |
| institution | OA Journals |
| issn | 1392-1320 2029-7289 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Kaunas University of Technology |
| record_format | Article |
| series | Medžiagotyra |
| spelling | doaj-art-58d1db3ab34044679bcc8cd99b5c705c2025-08-20T02:36:02ZengKaunas University of TechnologyMedžiagotyra1392-13202029-72892025-06-0110.5755/j02.ms.4083146085Synthesis and Performance of Polycarboxylate Superplasticizer Based on a Novel Redox System of Manganese Dioxide/AcidSiyong CHENG0Xintang WANG1Si WU2Luyan WANG3https://orcid.org/0000-0003-4605-2490Zibo Transportation Construction Development CenterShandong Hi-Speed Infrastructure Construction Co., Ltd.Shandong Hi-Speed Engineering Test Co., Ltd.University of JinanThis study aims to develop a novel redox system based on manganese dioxide (MnO₂)/acid for synthesizing polycarboxylate superplasticizers (MPCE) via solution copolymerization of acrylic acid (AA) and methallyl polyoxyethylene ethers (TPEG). The performance of MPCE synthesized using MnO₂ combined with different acids (citric acid, tartaric acid, oxalic acid) was compared with two conventional redox systems: ascorbic acid (VC)/H₂O₂ and ammonium persulfate. The MnO₂/citric acid system proved most effective, attributed to its one-step reaction to generate primary free radicals. Optimal reaction conditions were determined as a molar ratio of AA to TPEG (Mn=2400) of 3.5:1.0 and [MnO₂]:[citric acid] of 1:1. The longer side chains of MPCE enhanced adsorption on cement particles and dispersing performance via steric hindrance. Cement paste containing MPCE-2400 showed superior dispersing ability, retention capacity, clay resistance, and hardened mechanical properties. The findings highlight the critical role of the MnO₂/acid redox system in optimizing MPCE synthesis.https://matsc.ktu.lt/index.php/MatSc/article/view/40831manganese dioxideacidcementdispersionsuperplasticizer |
| spellingShingle | Siyong CHENG Xintang WANG Si WU Luyan WANG Synthesis and Performance of Polycarboxylate Superplasticizer Based on a Novel Redox System of Manganese Dioxide/Acid Medžiagotyra manganese dioxide acid cement dispersion superplasticizer |
| title | Synthesis and Performance of Polycarboxylate Superplasticizer Based on a Novel Redox System of Manganese Dioxide/Acid |
| title_full | Synthesis and Performance of Polycarboxylate Superplasticizer Based on a Novel Redox System of Manganese Dioxide/Acid |
| title_fullStr | Synthesis and Performance of Polycarboxylate Superplasticizer Based on a Novel Redox System of Manganese Dioxide/Acid |
| title_full_unstemmed | Synthesis and Performance of Polycarboxylate Superplasticizer Based on a Novel Redox System of Manganese Dioxide/Acid |
| title_short | Synthesis and Performance of Polycarboxylate Superplasticizer Based on a Novel Redox System of Manganese Dioxide/Acid |
| title_sort | synthesis and performance of polycarboxylate superplasticizer based on a novel redox system of manganese dioxide acid |
| topic | manganese dioxide acid cement dispersion superplasticizer |
| url | https://matsc.ktu.lt/index.php/MatSc/article/view/40831 |
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