Synthesis and Modification of Polycarboxylate Superplasticizers—A Review

Xia, Yuchen; Shi, Wei; Xiang, Shuncheng; Yang, Xin; Yuan, Ming; Zhou, Huan; Yu, Haotian; Zheng, Tingxiang; Zhang, Jiake; Jiang, Zhen; Huang, Liangjun

doi:10.3390/ma17051092

Cited by 4 publications

(1 citation statement)

References 71 publications

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“…Previous research [ 25 , 26 , 27 , 28 , 29 ] has demonstrated that a polymer derivative of polycarboxylate ether can effectively serve as a superplasticizer, enhancing the workability of fresh mortar augmenting its fluidity. This obviates the necessity for excessive mixing water and allows for fine-tuning the paste’s fluidity to attain a more easily manageable consistency.…”

Section: Introductionmentioning

confidence: 99%

Study on the Interaction of Polymeric Chemical Additives with Phase Change Materials in Air Lime Renders

Rubio-Aguinaga,

Fernández,

Navarro-Blasco

et al. 2024

Polymers

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The interaction of microencapsulated phase change materials (PCMs) with polymeric chemical additives in an air lime binding matrix was studied. These polymer-based additives included an adhesion booster (derived from starch) and a superplasticizer (polycarboxylate ether). Two different PCMs with melting points of 18 °C and 24 °C were assayed. The microcapsules were composed of melamine, with paraffin-based PCM cores. Measurements of zeta potential, particle size distribution, adsorption isotherms, and viscosity analyses were performed to comprehend the behavior of the polymer-based additives within the air lime matrix and their compatibility with PCMs. Zeta potential experiments pointed to the absence of a strong interaction between the lime particles and the microcapsules of PCMs. At the alkaline pH of the lime mortar, the negative charge resulting from the deprotonation of the melamine shell of the microcapsules was shielded by cations, yielding high positive zeta potential values and stable dispersions of lime with PCMs. The polycarboxylate ether demonstrated the ability to counteract the increase in mixing water demand caused by the PCM addition in the lime matrix. The dispersing action of the superplasticizer on the lime particles was seen to exert a collateral dispersion of the PCMs. Conversely, despite the positive values of zeta potential, the addition of the starch-based additive resulted in the formation of large PCM-lime clumps. Air lime renders incorporating 5, 10, and 20% PCMs by weight with various dosages of these chemical additives were experimented with until the optimal formulation for the specific application of the mortars as renderings was achieved. This fine-tuned formulation effectively tackled issues commonly associated with the addition of PCMs to mortars, such as poor adhesion, crack formation, and reduced fluidity.

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Section: Introductionmentioning

confidence: 99%

Study on the Interaction of Polymeric Chemical Additives with Phase Change Materials in Air Lime Renders

Rubio-Aguinaga,

Fernández,

Navarro-Blasco

et al. 2024

Polymers

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Application of adhesives in the treatment of cartilage repair

Feng,

Ang,

Guan

et al. 2024

Interdisciplinary Medicine

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From degeneration causing intervertebral disc issues to trauma‐induced meniscus tears, diverse factors can injure the different types of cartilage. This review highlights adhesives as a promising and rapidly implemented repair strategy. Compared to traditional techniques such as sutures and wires, adhesives offer several advantages. Importantly, they seamlessly connect with the injured tissue, deliver bioactive substances directly to the repair site, and potentially alleviate secondary problems like inflammation or degeneration. This review delves into the cutting‐edge advancements in adhesive technology, specifically focusing on their effectiveness in cartilage injury treatment and their underlying mechanisms. We begin by exploring the material characteristics of adhesives used in cartilage tissue, focusing on essential aspects like adhesion, biocompatibility, and degradability. Subsequently, we investigate the various types of adhesives currently employed in this context. Our discussion then moves to the unique role adhesives play in addressing different cartilage injuries. Finally, we acknowledge the challenges currently faced by this promising technology.

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Synthesis and characterization of vinyltriethoxysilane-modified polycarboxylate superplasticiser for enhanced sulfate resistance

Gao,

Dong,

Guo

et al. 2024

Preprint

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The strategic integration of functional monomers within the molecular structure of polycarboxylate superplasticizers offers a viable route to augment their inherent performance capabilities or introduce novel functionalities. In this investigation, a novel silane-modified polycarboxylate superplasticizer (Si-PCE) was synthesized via a free radical polymerization process at room temperature. This synthesis leveraged the high reactivity of ethylene glycol monoethylene glycol ether (EPEG), acrylic acid (AA), and vinyltriethoxysilane (VTEO) as the core monomers. The chemical structure of Si-PCE was characterized by Fourier transform infrared spectroscopy (FT-IR), 1H Nuclear magnetic resonance (1H NMR), and Energy dispersion spectroscopy (EDS). To evaluate the performance of Si-PCE, its influence on the early hydration products of cement was analyzed using X-ray Diffraction (XRD). Furthermore, the dispersibility of Si-PCE was assessed through cement paste fluidity and mortar fluidity tests, while its impact on mechanical property was investigated via mortar strength measurement. The findings revealed that Si-PCE surpassed silane-free PCEs in terms of dispersibility and dispersion retention, leading to enhanced mechanical property. In addition, the adaptability of Si-PCE in sulfate-rich environments was examined by conducting cement paste fluidity, mortar fluidity, and mortar compressive strength tests. Notably, Si-PCE demonstrated superior performance compared to its silane-free counterpart, particularly in high-sulfate environments, where it effectively dispersed cement particles and significantly bolstered the mechanical property of cement mortar. In conclusion, Si-PCE exhibited not only superior performance under conventional conditions but also remarkable adaptability and stability in sulfate-rich environments, thereby portending its extensive potential for application and profound implications.

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Synthesis and Modification of Polycarboxylate Superplasticizers—A Review

Cited by 4 publications

References 71 publications

Study on the Interaction of Polymeric Chemical Additives with Phase Change Materials in Air Lime Renders

Study on the Interaction of Polymeric Chemical Additives with Phase Change Materials in Air Lime Renders

Application of adhesives in the treatment of cartilage repair

Synthesis and characterization of vinyltriethoxysilane-modified polycarboxylate superplasticiser for enhanced sulfate resistance

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