1
|
Chang Q, Hu M, Liu M, Pang J, Liu G, Guo J. Preparation of a Polycarboxylate Superplasticizer with Different Monomer Regulations and Its Effect on Fluidity, Rheology, and Strength of Cement. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:5673-5687. [PMID: 38456348 DOI: 10.1021/acs.langmuir.3c03021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/09/2024]
Abstract
Polycarboxylate superplasticizers (PCEs) are indispensable functional ingredients in modern construction, and their usage is extensive. Herein, a polyether macromonomer (VPEG) with high reactivity was used to prepare VAPCEs with different interfacial adsorption properties (acid-ether ratio) at low temperatures and reacted in 30 min. The effects of various VAPCEs on the fluidity, rheology, and strength of cement were investigated with a w/c (water/cement) ratio of 0.35. Results showed that VAPCE-3 (acid-ether ratio is 3) exhibited the best dispersion, and the fluidity of cement slurry with VAPCE-3 (280 mm) is 278.38% higher than that of the control sample (74 mm). The reason is summarized as VAPCE-3 having good adsorption performance on the surface of cement particles and having a large steric hindrance between particles. The compressive strength of cement with VAPCE-3 was enhanced by 8.29% compared with pure cement in 3 days of curing age due to its densification on microstructure and lowest R orientation index of calcium hydroxide. With the amount of acrylic acid in VAPCE increasing, the flexural strength enhanced because a more cross-linking network was formed with Ca2+ in cement with the increase of COO- content in VAPCEs.
Collapse
Affiliation(s)
- Qinglu Chang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
| | - Miaomiao Hu
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
- Zhejiang Institute of Tianjin University (Shaoxing), Zhejiang 312300, China
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China
| | - Ming Liu
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
| | - Jianjun Pang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
| | - Guoqing Liu
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
| | - Jintang Guo
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
- Zhejiang Institute of Tianjin University (Shaoxing), Zhejiang 312300, China
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China
| |
Collapse
|
2
|
Tripathi B. Effects of Polymers on Cement Hydration and Properties of Concrete: A Review. ACS OMEGA 2024; 9:2014-2021. [PMID: 38250407 PMCID: PMC10795056 DOI: 10.1021/acsomega.3c05914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 11/04/2023] [Accepted: 12/01/2023] [Indexed: 01/23/2024]
Abstract
Polymer compounds have become a popular choice for the synthesis of novel products and are being used in cementitious mixtures principally for altering the properties in the fresh state and as repair materials. These polymers are used in various combinations. Their interaction with cement is worth studying because its hydration, followed by setting and hardening, is the primary phenomenon contributing to the strength gain and performance of concrete. This paper summarizes the effects of different polymers on the hydration of cement and the properties of concrete/mortar. Studies have established that the incorporation of polymers as a workability enhancing admixture or for improving strength, durability, and other properties severely affects the early hydration of cement and reduces the overall strength gain in most cases. The hydration retarding effect depends on the charge, architecture, and the amount (wt %) of polymer added. However, owing to the densification of the interfacial transition zone and formation of polymer films/bridges between stacks of calcium hydroxide surfaces and air, the later age properties show beneficial effects such as higher flexural strength, enhanced compressive strength, and modulus of elasticity, better resistance against frost, and corrosion of steel reinforcement. Further, it is seen that the hydration retardation may be mitigated to some extent by the addition of silica fume or zeolite; using a defoaming agent; curing at high temperatures; and following a combination of wet, moist, and dry curing regimes. This review is expected to be helpful to all practicing civil engineers who are the immediate users of these chemicals and are working to achieve quality concrete construction.
Collapse
Affiliation(s)
- Bhavna Tripathi
- Department of Civil Engineering, Manipal University Jaipur, Dehmi Kalan, Jaipur-Ajmer Expressway, Jaipur, Rajasthan 303007, India
| |
Collapse
|
3
|
Indumathy B, Sathiyanathan P, Prasad G, Reza MS, Prabu AA, Kim H. A Comprehensive Review on Processing, Development and Applications of Organofunctional Silanes and Silane-Based Hyperbranched Polymers. Polymers (Basel) 2023; 15:polym15112517. [PMID: 37299316 DOI: 10.3390/polym15112517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 05/04/2023] [Accepted: 05/12/2023] [Indexed: 06/12/2023] Open
Abstract
Since the last decade, hyperbranched polymers (HBPs) have gained wider theoretical interest and practical applications in sensor technology due to their ease of synthesis, highly branched structure but dimensions within nanoscale, a larger number of modified terminal groups and lowering of viscosity in polymer blends even at higher HBP concentrations. Many researchers have reported the synthesis of HBPs using different organic-based core-shell moieties. Interestingly, silanes, as organic-inorganic hybrid modifiers of HBP, are of great interest as they resulted in a tremendous improvement in HBP properties like increasing thermal, mechanical and electrical properties compared to that of organic-only moieties. This review focuses on the research progress in organofunctional silanes, silane-based HBPs and their applications since the last decade. The effect of silane type, its bi-functional nature, its influence on the final HBP structure and the resultant properties are covered in detail. Methods to enhance the HBP properties and challenges that need to be overcome in the near future are also discussed.
Collapse
Affiliation(s)
- Balaraman Indumathy
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore 632 014, Tamil Nadu, India
| | - Ponnan Sathiyanathan
- Department of Advanced Materials Engineering for Information & Electronics, College of Engineering, Kyung Hee University, Yongin-si 17104, Republic of Korea
| | - Gajula Prasad
- School of Energy, Materials and Chemical Engineering, Korea University of Technology and Education, 1600, Cheonan-si 31253, Republic of Korea
| | - Mohammad Shamim Reza
- Department of Advanced Materials Engineering for Information & Electronics, College of Engineering, Kyung Hee University, Yongin-si 17104, Republic of Korea
| | - Arun Anand Prabu
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore 632 014, Tamil Nadu, India
| | - Hongdoo Kim
- Department of Advanced Materials Engineering for Information & Electronics, College of Engineering, Kyung Hee University, Yongin-si 17104, Republic of Korea
| |
Collapse
|
4
|
Sutradhar S, Gao W, Fatehi P. A Green Cement Plasticizer from Softwood Kraft Lignin. Ind Eng Chem Res 2023. [DOI: 10.1021/acs.iecr.2c03970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Shrikanta Sutradhar
- Biorefining Research Institute, Lakehead University, 955 Oliver Road, Thunder Bay, OntarioP7B 5E1, Canada
| | - Weijue Gao
- Biorefining Research Institute, Lakehead University, 955 Oliver Road, Thunder Bay, OntarioP7B 5E1, Canada
| | - Pedram Fatehi
- Biorefining Research Institute, Lakehead University, 955 Oliver Road, Thunder Bay, OntarioP7B 5E1, Canada
| |
Collapse
|
5
|
Zhang Q, Chen J, Zhu J, Yang Y, Zhou D, Wang T, Shu X, Qiao M. Advances in Organic Rheology-Modifiers (Chemical Admixtures) and Their Effects on the Rheological Properties of Cement-Based Materials. MATERIALS (BASEL, SWITZERLAND) 2022; 15:8730. [PMID: 36556536 PMCID: PMC9784188 DOI: 10.3390/ma15248730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 11/19/2022] [Accepted: 12/05/2022] [Indexed: 06/17/2023]
Abstract
Organic rheology modifiers, especially superplasticizers and viscosity-modifying admixtures (VMAs), have become key components for the workability optimization of modern concrete. The development of these admixtures is crucial to the further performance improvement of modern concrete under different casting and service conditions. Many of the former reviews have summarized research advances in respect of these admixtures from chemical and material perspectives, focusing on the effects of structure and the performance. In this paper, from a rheological perspective, an overview is provided of the microscale behavior of polycarboxylate (PCE) superplasticizers and VMAs (e.g., adsorption, conformation, and bridging) in terms of the evolution of the microstructure of the paste, the effect of chemical structure on the yield stress, the apparent viscosity and thixotropy of cement-based materials, and the structure design of these admixtures. Most importantly, in addition to a general discussion with assumptions (monolayer adsorption of a "flat" conformation, with each molecule on a single particle; statistical polymer composition), special conditions (e.g., preferential adsorption, depletion effects, hydration modification effects, and the polydispersity of the polymer composition) are discussed. Newly developed admixtures, realized through regulation of the microscale behavior, and by the modification of adsorption, topological structure, and molecular frame, are introduced.
Collapse
Affiliation(s)
- Qianqian Zhang
- State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Sobute New Materials Co., Ltd., Nanjing 211103, China
| | - Jian Chen
- State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Sobute New Materials Co., Ltd., Nanjing 211103, China
| | - Jiang Zhu
- Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China
| | - Yong Yang
- State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Sobute New Materials Co., Ltd., Nanjing 211103, China
| | - Dongliang Zhou
- State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Sobute New Materials Co., Ltd., Nanjing 211103, China
| | - Tao Wang
- State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Sobute New Materials Co., Ltd., Nanjing 211103, China
| | - Xin Shu
- State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Sobute New Materials Co., Ltd., Nanjing 211103, China
| | - Min Qiao
- State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Sobute New Materials Co., Ltd., Nanjing 211103, China
| |
Collapse
|
6
|
Zhang H, Liu C, Ren X, Yang H, Lin S. Synthesis of polycarboxylic ether superplasticizers based on the high conversion of EPEG in a transition metal oxide heterogeneous catalytic system. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
7
|
Alberts EM, Fernando PUAI, Thornell TL, George HE, Koval AM, Shukla MK, Weiss CA, Moores LC. Toward bioinspired polymer adhesives: activation assisted via HOBt for grafting of dopamine onto poly(acrylic acid). ROYAL SOCIETY OPEN SCIENCE 2022; 9:211637. [PMID: 35360348 PMCID: PMC8965409 DOI: 10.1098/rsos.211637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 02/17/2022] [Indexed: 05/03/2023]
Abstract
The design of bioinspired polymers has long been an area of intense study, however, applications to the design of concrete admixtures for improved materials performance have been relatively unexplored. In this work, we functionalized poly(acrylic acid) (PAA), a simple analogue to polycarboxylate ether admixtures in concrete, with dopamine to form a catechol-bearing polymer (PAA-g-DA). Synthetic routes using hydroxybenzotriazole (HOBt) as an activating agent were examined for their ability in grafting dopamine to the PAA backbone. Previous literature using the traditional coupling reagent 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide (EDC) to graft dopamine to PAA were found to be inconsistent and the sensitivity of EDC coupling reactions necessitated a search for an alternative. Additionally, HOBt allowed for greater control over per cent functionalization of the backbone, is a simple, robust reaction, and showed potential for scalability. This finding also represents a novel synthetic pathway for amide bond formation between dopamine and PAA. Finally, we performed preliminary adhesion studies of our polymer on rose granite specimens and demonstrated a 56% improvement in the mean adhesion strength over unfunctionalized PAA. These results demonstrate an early study on the potential of PAA-g-DA to be used for improving the bonds within concrete.
Collapse
Affiliation(s)
| | - P. U. Ashvin Iresh Fernando
- Bennett Aerospace, 1100 Crescent Green, #250, Cary, NC 27518, USA
- Oak Ridge Institute for Science and Education, 1299 Bethel Valley Rd, Oak Ridge, TN 37830, USA
| | - Travis L. Thornell
- US Army Engineer Research and Development Center, Geotechnical and Structures Laboratory, 3909 Halls Ferry Road, Vicksburg, MS 39180, USA
| | - Hannah E. George
- School of Polymer Science and Engineering, The University of Southern Mississippi, 118 College Dr, Hattiesburg, MS 39406, USA
| | - Ashlyn M. Koval
- Oak Ridge Institute for Science and Education, 1299 Bethel Valley Rd, Oak Ridge, TN 37830, USA
| | - Manoj K. Shukla
- US Army Engineer Research and Development Center, Environmental Laboratory, 3909 Halls Ferry Road, Vicksburg, MS 39180, USA
| | - Charles A. Weiss
- US Army Engineer Research and Development Center, Geotechnical and Structures Laboratory, 3909 Halls Ferry Road, Vicksburg, MS 39180, USA
| | - Lee C. Moores
- US Army Engineer Research and Development Center, Environmental Laboratory, 3909 Halls Ferry Road, Vicksburg, MS 39180, USA
| |
Collapse
|
8
|
Influence of Pentaerythritol Tetraacrylate Crosslinker on Polycarboxylate Superplasticizer Performance in Cementitious System. MATERIALS 2022; 15:ma15041524. [PMID: 35208064 PMCID: PMC8875641 DOI: 10.3390/ma15041524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 02/12/2022] [Accepted: 02/15/2022] [Indexed: 12/01/2022]
Abstract
In this work, a crosslinked polycarboxylate superplasticizer (crosslinked-PC) was synthesized via the free radical polymerization reaction. Pentaerythritol tetraacrylate (PETA) was used as the crosslinked agent. A comparative comb-like polycarboxylate superplasticizer (comb-like-PC) was prepared under the same reaction conditions. The dispersion retention capacity, dispersion capability, hydration characteristics of the cement paste and setting time were investigated in detail. At the dosage of 0.6% bwoc, the fluidity of the cement/crosslinked-PC paste was about 340 mm, which was 40~50 mm larger than the cement/comb-like-PC paste. The dispersion retention capacity of the cement/crosslinked-PC paste was observed to be much superior due to higher adsorbed amounts on the cement particles. Moreover, the cement/crosslinked-PC paste exhibited the initial and final setting durations of 196 and 356 min, respectively, which indicated an enhancement of 18 and 68 min compared to the cement/comb-like paste. The crosslinked copolymers exhibit a stronger retardation effect than the comb-like copolymers due to their enhanced adsorbed amounts and stronger steric hindrance effect. This is further illustrated by the characterization of the hydration process and hydration products. It can be concluded that it is feasible to improve the dispersive capacity and the dispersion retention capacity of PC by changing the molecule structure from comb-like to slightly crosslinked.
Collapse
|
9
|
Walkley B, Geddes DA, Matsuda T, Provis JL. Reversible Adsorption of Polycarboxylates on Silica Fume in High pH, High Ionic Strength Environments for Control of Concrete Fluidity. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:1662-1671. [PMID: 35090118 PMCID: PMC9007537 DOI: 10.1021/acs.langmuir.1c02419] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 01/06/2022] [Indexed: 06/14/2023]
Abstract
Polycarboxylate-based superplasticizers are essential for production of ultrahigh-performance concrete (UHPC), facilitating particle dispersion through electrostatic repulsion and steric hindrance. This study examines for the first time the effect of changes in pH, ionic strength, and charge on the adsorption/desorption behavior of a polycarboxylate-based superplasticizer on silica fume in aqueous chemistries common in low-CO2 UHPC. Data from total organic carbon measurements, Fourier transform infrared and nuclear magnetic resonance spectroscopy, and zeta potential measurements reveal the silica surface chemistry and electrokinetic properties in simulated UHPC. Addition of divalent cations (Ca2+) results in polycarboxylate adsorption on silica fume via (i) adsorption of Ca2+ ions on the silica surface and a negative zeta potential of lower magnitude on the silica surface and (ii) reduction of polycarboxylate anionic charge density due to complexation with Ca2+ ions and counter-ion condensation. Addition of OH- ions results in polycarboxylate desorption via deprotonation of silanol groups and a negative zeta potential of greater magnitude on the silica surface. Simultaneous addition of both Ca2+ and OH- results in rapid polycarboxylate desorption via (i) formation of an electric double layer and negative zeta potential on the silica surface and (ii) an increase in polycarboxylate anionic charge density due to deprotonation of the carboxylate groups in the polymer backbone, complexation with Ca2+ ions, and counter-ion condensation. This provides an explanation for the remarkable fluidizing effect observed upon addition of small amounts (1.0 wt %) of a solid, powdered Ca source to fresh, low-CO2, UHPC, which exhibits significantly higher fresh state pH (>13) than those based on Portland cement (pH 11).
Collapse
Affiliation(s)
- Brant Walkley
- Department
of Materials Science and Engineering, The
University of Sheffield, Sheffield S1 3JD, UK
- Department
of Chemical and Biological Engineering, The University of Sheffield, Sheffield S1 3JD, UK
| | - Daniel A. Geddes
- Department
of Materials Science and Engineering, The
University of Sheffield, Sheffield S1 3JD, UK
| | - Taku Matsuda
- Construction
Material Group and Geotechnical Technology Department, Sumitomo Mitsui Construction Co., Ltd., Nagareyama-Shi, Chiba 270-0132, Japan
| | - John L. Provis
- Department
of Materials Science and Engineering, The
University of Sheffield, Sheffield S1 3JD, UK
| |
Collapse
|
10
|
Novel poly(amino acid)-type superplasticizers with enhanced dispersing performance for Portland cement doped with clay impurities. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.127953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
11
|
Feng P, Zhang G, Zhang W, Cui H, Xin T. Comparison of ester-based slow-release polycarboxylate superplasticizers with their polycarboxylate counterparts. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.127878] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
12
|
Rafiee Z, Omidi S. Modification of carbon-based nanomaterials by polyglycerol: recent advances and applications. RSC Adv 2021; 12:181-192. [PMID: 35424494 PMCID: PMC8978678 DOI: 10.1039/d1ra07554c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 12/07/2021] [Indexed: 12/12/2022] Open
Abstract
Hyperbranched polymers, a subclass of dendritic polymers, mimic nature's components such as trees and nerves. Hyperbranched polyglycerol (HPG) is a hyperbranched polyether with outstanding physicochemical properties, including high water-solubility and functionality, biocompatibility, and an antifouling feature. HPG has attracted great interest in the modification of different objects, in particular carbon-based nanomaterials. In this review, recent advances in the synthesis and application of HPG to modify carbon-based nanomaterials, including graphene, carbon nanotubes, fullerene, nanodiamonds, carbon dots, and carbon fibers, are reviewed.
Collapse
Affiliation(s)
- Zeinab Rafiee
- Department of Chemistry, Malayer University Malayer Iran
| | - Sakineh Omidi
- Shahid Beheshti University of Medical Sciences Tehran Iran +98-9181438542
| |
Collapse
|
13
|
Magina S, Barros-Timmons A, Evtuguin DV. Synthesis of Lignosulfonate-Based Dispersants for Application in Concrete Formulations. MATERIALS (BASEL, SWITZERLAND) 2021; 14:7388. [PMID: 34885542 PMCID: PMC8658405 DOI: 10.3390/ma14237388] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 11/17/2021] [Accepted: 11/29/2021] [Indexed: 11/16/2022]
Abstract
Lignosulfonates (LS) are products from the sulfite pulping process that could be applied as renewable environmentally-friendly polymeric surfactants. Being widely used as plasticizers and water-reducing admixtures in concrete formulations LS compete in the market with petroleum-based superplasticizers, such as naphthalene sulfonate formaldehyde polycondensate (NSF) and copolymer polycarboxylate ethers (PCE). In this work, different chemical modification strategies were used to improve LS performance as dispersants for concrete formulations. One strategy consisted in increasing the molecular weight of LS through different approaches, such as laccase and polyoxometalate-mediated polymerization, glyoxalation, and reversible addition-fragmentation chain transfer (RAFT) polymerization. The other strategy consisted of preparing LS-based non-ionic polymeric dispersants using two different epoxidized oligomer derivatives of poly(ethylene glycol) (PEG) and poly(propylene glycol) (PPG). Modified LS were used to prepare cement pastes, which were examined for their fluidity. Results revealed that the most promising products are PPG-modified LS due to the introduction of PPG chains by reaction with phenolic moieties in LS. The enhanced dispersant efficiency of the ensuing products is probably related not only to electrostatic repulsion caused by the sulfonic ionizable groups in LS but also to steric hindrance phenomena due to the grafted bulky PPG chains.
Collapse
Affiliation(s)
| | | | - Dmitry V. Evtuguin
- CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (S.M.); (A.B.-T.)
| |
Collapse
|
14
|
Wang H, Jiang Z, Guo L, Zheng R, Li J, Yao Z, Shan L. Aqueous Reversible Addition-Fragmentation Chain Transfer (RAFT) Polymerization: Synthesis, Properties, and Application of an Amphoteric Superplasticizer. RUSS J APPL CHEM+ 2021. [DOI: 10.1134/s1070427221080176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
15
|
de Morais SC, Bezerra BG, Castro BB, Balaban RDC. Evaluation of polyelectrolytic complexes based on poly(epichlorohydrin-co-dimethylamine) and poly (4-styrene-sulfonic acid-co-maleic acid) in the delivery of polyphosphates for the control of CaCO3 scale in oil wells. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116757] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
|
16
|
Capacchione C, Della Sala P, Quaratesi I, Bruno I, Pauciulo A, Bartiromo AR, Iannece P, Neri P, Talotta C, Gliubizzi R, Gaeta C. Poly(Ethylene Glycol)/β-Cyclodextrin Pseudorotaxane Complexes as Sustainable Dispersing and Retarding Materials in a Cement-Based Mortar. ACS OMEGA 2021; 6:12250-12260. [PMID: 34056378 PMCID: PMC8154154 DOI: 10.1021/acsomega.1c01133] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 04/16/2021] [Indexed: 05/14/2023]
Abstract
Pseudorotaxane complexes between β-CD and mPEG derivatives bearing a carboxylic acid function (mPEG-COOH) were synthesized and investigated for their dispersing properties in a cement-based mortar. The formation of mPEG-COOH derivatives and their pseudorotaxanes was investigated by 1D nuclear magnetic resonance, diffusion ordered spectroscopy, and thermogravimetric analysis experiments. Mortar tests clearly indicate that mPEG-COOH@β-CD-interpenetrated supramolecules show excellent dispersing abilities. In addition, the supramolecular complexes show a retarding effect, analogously to other known β-CD-based superplasticizers in which the β-CD is covalently grafted on a polymeric backbone.
Collapse
Affiliation(s)
- Clotilde Capacchione
- Dipartimento
di Chimica e Biologia “A. Zambelli”, Università di Salerno, Via Giovanni Paolo II, 84084 Fisciano, Salerno, Italy
- BI-QEM
SPECIALTIES SPA, Zona
industriale, 84021 Buccino, Salerno, Italy
| | - Paolo Della Sala
- Dipartimento
di Chimica e Biologia “A. Zambelli”, Università di Salerno, Via Giovanni Paolo II, 84084 Fisciano, Salerno, Italy
| | - Ilaria Quaratesi
- Dipartimento
di Chimica e Biologia “A. Zambelli”, Università di Salerno, Via Giovanni Paolo II, 84084 Fisciano, Salerno, Italy
- BI-QEM
SPECIALTIES SPA, Zona
industriale, 84021 Buccino, Salerno, Italy
| | - Immacolata Bruno
- BI-QEM
SPECIALTIES SPA, Zona
industriale, 84021 Buccino, Salerno, Italy
| | - Antonio Pauciulo
- BI-QEM
SPECIALTIES SPA, Zona
industriale, 84021 Buccino, Salerno, Italy
| | | | - Patrizia Iannece
- Dipartimento
di Chimica e Biologia “A. Zambelli”, Università di Salerno, Via Giovanni Paolo II, 84084 Fisciano, Salerno, Italy
| | - Placido Neri
- Dipartimento
di Chimica e Biologia “A. Zambelli”, Università di Salerno, Via Giovanni Paolo II, 84084 Fisciano, Salerno, Italy
| | - Carmen Talotta
- Dipartimento
di Chimica e Biologia “A. Zambelli”, Università di Salerno, Via Giovanni Paolo II, 84084 Fisciano, Salerno, Italy
| | - Rocco Gliubizzi
- BI-QEM
SPECIALTIES SPA, Zona
industriale, 84021 Buccino, Salerno, Italy
| | - Carmine Gaeta
- Dipartimento
di Chimica e Biologia “A. Zambelli”, Università di Salerno, Via Giovanni Paolo II, 84084 Fisciano, Salerno, Italy
| |
Collapse
|
17
|
Shu J, Yu L, Ding R, Zhang L. Efficient synthesis of polyether polyols in simple microreactors. REACT CHEM ENG 2021. [DOI: 10.1039/d0re00446d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
High-quality polyether polyols with different molecular weights were efficiently synthesized in simple microreactors.
Collapse
Affiliation(s)
- Jiahui Shu
- State Key Laboratory of Materials-Oriented Chemical Engineering and College of Chemical Engineering
- Nanjing Tech University
- Nanjing 211816
- PR China
| | - Liang Yu
- Chemical Technology
- Luleå University of Technology
- Luleå
- Sweden
| | - Rong Ding
- State Key Laboratory of Materials-Oriented Chemical Engineering and College of Chemical Engineering
- Nanjing Tech University
- Nanjing 211816
- PR China
| | - Lixiong Zhang
- State Key Laboratory of Materials-Oriented Chemical Engineering and College of Chemical Engineering
- Nanjing Tech University
- Nanjing 211816
- PR China
| |
Collapse
|
18
|
Capacchione C, Picariello D, Della Sala P, Talotta C, Neri P, Bruno I, Pauciulo A, Bartiromo AR, Gliubizzi R, Gaeta C. Dispersing and Retarding Properties of Water-Soluble Tetrasulfonate Resorcin[4]arene and Pyrogallol[4]arene Macrocycles in Cement-Based Mortar. ACS OMEGA 2020; 5:18218-18225. [PMID: 32743197 PMCID: PMC7391848 DOI: 10.1021/acsomega.0c01837] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 06/04/2020] [Indexed: 05/27/2023]
Abstract
Water-soluble tetrasulfonate resorcin[4]arene (1a and 1c) and pyrogallol[4]arene (1b) macrocycles were synthesized and investigated for their dispersing properties in cement-based mortars. Mortar tests clearly show that these polyhydroxylated macrocycles (nonpolymeric) work as cement dispersants. Setting time determinations indicate that the macrocycles 1a and 1b show a retarding effect that is reminiscent of the behavior of superplasticizers (SPs) functionalized with polyhydroxylated β-CDs. Finally, the addition of sulfate anions to the cement paste does not affect the dispersing abilities of 1b, probably due to the sulfate anion capture by H-bonding interactions with its OH groups at the upper rim.
Collapse
Affiliation(s)
- Clotilde Capacchione
- Dipartimento
di Chimica e Biologia “A. Zambelli”, Università di Salerno, Via Giovanni Paolo II, 84084Fisciano, Salerno, Italia
- BI-QEM
SPECIALTIES S.p.A., Zona
industriale 84021 Buccino, Salerno, Italia
| | - Davide Picariello
- Dipartimento
di Chimica e Biologia “A. Zambelli”, Università di Salerno, Via Giovanni Paolo II, 84084Fisciano, Salerno, Italia
| | - Paolo Della Sala
- Dipartimento
di Chimica e Biologia “A. Zambelli”, Università di Salerno, Via Giovanni Paolo II, 84084Fisciano, Salerno, Italia
| | - Carmen Talotta
- Dipartimento
di Chimica e Biologia “A. Zambelli”, Università di Salerno, Via Giovanni Paolo II, 84084Fisciano, Salerno, Italia
| | - Placido Neri
- Dipartimento
di Chimica e Biologia “A. Zambelli”, Università di Salerno, Via Giovanni Paolo II, 84084Fisciano, Salerno, Italia
| | - Immacolata Bruno
- BI-QEM
SPECIALTIES S.p.A., Zona
industriale 84021 Buccino, Salerno, Italia
| | - Antonio Pauciulo
- BI-QEM
SPECIALTIES S.p.A., Zona
industriale 84021 Buccino, Salerno, Italia
| | | | - Rocco Gliubizzi
- BI-QEM
SPECIALTIES S.p.A., Zona
industriale 84021 Buccino, Salerno, Italia
| | - Carmine Gaeta
- Dipartimento
di Chimica e Biologia “A. Zambelli”, Università di Salerno, Via Giovanni Paolo II, 84084Fisciano, Salerno, Italia
| |
Collapse
|
19
|
Lo FC, Lo SL, Lee MG. Effect of partially replacing ordinary Portland cement with municipal solid waste incinerator ashes and rice husk ashes on pervious concrete quality. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:23742-23760. [PMID: 32301089 DOI: 10.1007/s11356-020-08796-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Accepted: 04/06/2020] [Indexed: 06/11/2023]
Abstract
Pervious concrete (PC) provides multiple benefits, including reducing stormwater runoff, purifying water, recharging groundwater, and reducing the heat island effect. This study aims to determine an effective way to reuse municipal solid waste incinerator (MSWI) fly ash (FA), MSWI bottom ash (BA), and rice husk ash (RHA) as single or binary partial replacements for ordinary Portland cement (OPC) in PC. The ashes and PC specimens were characterized via X-ray fluorescence spectroscopy, X-ray powder diffraction, field emission-scanning electron microscopy, and Fourier transform infrared spectroscopy. The compressive strength, water permeability, and toxicity characteristic leaching procedure (TCLP)-released metals were investigated to evaluate the PC quality. The main components of the ashes were similar to those of OPC, suggesting that the ashes could be reused as cement materials; however, the cementitious activity of the ashes, especially MSWI FA, was relatively low. All ashes except 1100 °C MSWI FA met the standard requirements and can be applied as pozzolanic materials. The three PC specimens with binary replacements containing RHA (550, 700, and 900 °C) and MSWI BA (1100 °C) showed a synergistic effect and exhibited a higher 90-day compressive strength than the other specimens with single and binary ash replacements containing RHA (550 and 900 °C). The water permeability ranged between 0.106 and 0.391 cm/s, and the TCLP-released metal concentrations from all specimens met the regulatory standards of Taiwan. The results indicated that replacement with MSWI BA and RHA in cement materials provides an acceptable compressive strength and water permeability.
Collapse
Affiliation(s)
- Fang-Chen Lo
- Graduate Institute of Environmental Engineering, National Taiwan University, 71, Zhoushan Rd., Da'an Dist., Taipei City, 10673, Taiwan, Republic of China
| | - Shang-Lien Lo
- Graduate Institute of Environmental Engineering, National Taiwan University, 71, Zhoushan Rd., Da'an Dist., Taipei City, 10673, Taiwan, Republic of China.
| | - Ming-Gin Lee
- Department of Construction Engineering, Chaoyang University of Technology, 168, Jifeng E. Rd., Wufeng District., Taichung City, 41349, Taiwan, Republic of China
| |
Collapse
|
20
|
Effects of core-shell polycarboxylate superplasticizer on the fluidity and hydration behavior of cement paste. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124464] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
|