Influence of the molecular weight of carboxymethylcellulose on properties of Binder Jetting manufactured parts

Bartual, Cristina Fabuel; Pitarch, María Jesús Máñez; Martínez, Esteban García; Gómez-Tena, M.P.

doi:10.1016/j.oceram.2022.100285

Cited by 2 publications

(2 citation statements)

References 22 publications

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“…In this research study, a tilt test was conducted to determine the approximate gelation point of CMC in water [31]. CMC was incrementally introduced into the solution, with the concentration increasing by 1 wt.% at each step, until the point was reached where the solution no longer self-leveled upon the tilting of the vial.…”

Section: Methodsmentioning

confidence: 99%

Influence of Carboxymethyl Cellulose as a Thickening Agent for Glauber’s Salt-Based Low Temperature PCM

Thakkar,

Annavajjala,

Sobkowicz

et al. 2024

Materials

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This work is focused on a novel, promising low temperature phase change material (PCM), based on the eutectic Glauber’s salt composition. To allow phase transition within the refrigeration range of temperatures of +5 °C to +12 °C, combined with a high repeatability of melting–freezing processes, and minimized subcooling, the application of three variants of sodium carboxymethyl cellulose (Na-CMC) with distinct molecular weights (700,000, 250,000, and 90,000) is considered. The primary objective is to optimize the stabilization of this eutectic PCM formulation, while maintaining the desired enthalpy level. Preparation methods are refined to ensure repeatability in mixing components, thereby optimizing performance and stability. Additionally, the influence of Na-CMC molecular weight on stabilization is examined through differential scanning calorimetry (DSC), T-history, and rheology tests. The PCM formulation of interest builds upon prior research in which borax, ammonium chloride, and potassium chloride were used as additives to sodium sulfate decahydrate (Glauber’s salt), prioritizing environmentally responsible materials. The results reveal that CMC with molecular weights of 250 kg/mol and 90 kg/mol effectively stabilize the PCM without phase separation issues, slowing crystallization kinetics. Conversely, CMC of 700 kg/mol proved ineffective due to the disruption of gel formation at its low gel point, hindering higher concentrations. Calculations of ionic concentration indicate higher Na ion content in PCM stabilized with 90 kg/mol CMC, suggesting increased ionic interactions and gel strength. A tradeoff is discovered between the faster crystallization in lower molecular weight CMC and the higher concentration required, which increases the amount of inert material that does not participate in the phase transition. After thermal cycling, the best formulation had a latent heat of 130 J/g with no supercooling, demonstrating excellent performance. This work advances PCM’s reliability as a thermal energy storage solution for diverse applications and highlights the complex relationship between Na-CMC molecular weight and PCM stabilization.

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Section: Methodsmentioning

confidence: 99%

Influence of Carboxymethyl Cellulose as a Thickening Agent for Glauber’s Salt-Based Low Temperature PCM

Thakkar,

Annavajjala,

Sobkowicz

et al. 2024

Materials

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“…Numerous works had been done to figure out the most effective parameters on the process quality. Regarding the literature the main parameters affecting the characteristics of the built parts are: (1) Powder characteristics (2) binder agent characteristics and (3) printing parameters [9]. Regarding the powder characteristics, the most important properties to be controlled that affect the final result are the powder morphology, particle size distributions (PSD), flow-ability and spread-ability [10].…”

Section: Influence Of Process Parametersmentioning

confidence: 99%

Binder jetting additive manufacturing comparative study

Abdelkhalek

2023

J. Phys.: Conf. Ser.

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This comparative study aims to analyze the most relevant literature regarding Binder Jetting Additive Manufacturing (BJAM) process. The paper starts with section one to briefly introduce the process. Section two of the paper presents an overview of the technology; the main advantages and shortcomings are also addressed. Then, the materials that are mostly employed in BJ are introduced. In section four, the most important design considerations that must be taken into account in this process are presented. Section five of the paper compares the BJ systems available nowadays. Some relevant examples of components and geometries that can be created with this technology are presented next with special emphasis on applications for high-tech industries. Then, the main challenges and limitations along with the prospects of the BJ process are discussed. Finally, the main conclusions extracted from the literature review conducted are listed.

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Influence of the molecular weight of carboxymethylcellulose on properties of Binder Jetting manufactured parts

Cited by 2 publications

References 22 publications

Influence of Carboxymethyl Cellulose as a Thickening Agent for Glauber’s Salt-Based Low Temperature PCM

Influence of Carboxymethyl Cellulose as a Thickening Agent for Glauber’s Salt-Based Low Temperature PCM

Binder jetting additive manufacturing comparative study

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