Performance and Microstructural Features of Sodium Silicate Shell Cured via Microfluidic Droplets of Citric Acid Solution.
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| Title: | Performance and Microstructural Features of Sodium Silicate Shell Cured via Microfluidic Droplets of Citric Acid Solution. |
|---|---|
| Authors: | Yuan, Yujie1,2 (AUTHOR), Liu, Chang1,2 (AUTHOR) clliu@imut.edu.cn, Chen, Zhijun1 (AUTHOR), Tian, Zhongxing1 (AUTHOR), Liu, Xiangdong1,2 (AUTHOR) liuxd@imut.edu.cn |
| Source: | International Journal of Metalcasting. May2025, Vol. 19 Issue 3, p1448-1461. 14p. |
| Subjects: | Chemical process control, Fourier transform infrared spectroscopy, Physical sciences, Soluble glass, Investment casting |
| Abstract: | The large solid waste discharge of investment casting shells is closely related to its unstable performance of shells and uncontrolled curing reaction. The unique advantage of microfluidic technology is that it can effectively control the chemical reaction process. In the present work, an environmentally friendly citric acid widely used in food as hardening agent was employed to cure a sodium silicate shells. Droplets of citric acid solution with a concentration of 1.5 × 10−3 mol/L were generated by microfluidic technology and spread on the surfaces of shell specimens driven by air flow to induce the shell hardening. The green-, fired-, residual-strength, high temperature self-weight deformation, and gas to permeability of the shell were investigated. The results showed that the peak strength reached 30.38 MPa for green shell and 10.61MPa for the fired shell, about 26.4% and 17.4% higher than the immersion method, respectively. The fracture morphology of the shell observed by SEM (Scanning Electron Microscopy) confirmed that the more uniform, and far less cracks and micropores formed on the sodium silicate film of shells hardened by microfluidic droplets than the dipping method. The analysis of FTIR (Fourier Transform Infrared Spectroscopy) reveals that the final products of sodium silicate gel cured by microfluidic droplets achieved a high degree of polymerization and generated a relatively dense Si–O–Si cellular structure. The phase composition and thermal stability of the shell were analyzed by XRD (X-ray Diffraction) and TG-DSC (Thermogravimetric Differential Scanning Calorimetry). The results demonstrate that the improvement in hardening performance of shells is due to reaction microfluidic technology that can precisely control the volume and rate of hardening agent droplets, which can improve the repeatability and stability of the reaction in a short time, as well as reduce the damage of the gel film during the hardening process, and improve the quality of the gel film. The resulting shell can achieve higher strength and stability. [ABSTRACT FROM AUTHOR] |
| Copyright of International Journal of Metalcasting is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
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| Items | – Name: Title Label: Title Group: Ti Data: Performance and Microstructural Features of Sodium Silicate Shell Cured via Microfluidic Droplets of Citric Acid Solution. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Yuan%2C+Yujie%22">Yuan, Yujie</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Chang%22">Liu, Chang</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> clliu@imut.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Chen%2C+Zhijun%22">Chen, Zhijun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tian%2C+Zhongxing%22">Tian, Zhongxing</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Xiangdong%22">Liu, Xiangdong</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> liuxd@imut.edu.cn</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Metalcasting%22">International Journal of Metalcasting</searchLink>. May2025, Vol. 19 Issue 3, p1448-1461. 14p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Chemical+process+control%22">Chemical process control</searchLink><br /><searchLink fieldCode="DE" term="%22Fourier+transform+infrared+spectroscopy%22">Fourier transform infrared spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Physical+sciences%22">Physical sciences</searchLink><br /><searchLink fieldCode="DE" term="%22Soluble+glass%22">Soluble glass</searchLink><br /><searchLink fieldCode="DE" term="%22Investment+casting%22">Investment casting</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The large solid waste discharge of investment casting shells is closely related to its unstable performance of shells and uncontrolled curing reaction. The unique advantage of microfluidic technology is that it can effectively control the chemical reaction process. In the present work, an environmentally friendly citric acid widely used in food as hardening agent was employed to cure a sodium silicate shells. Droplets of citric acid solution with a concentration of 1.5 × 10−3 mol/L were generated by microfluidic technology and spread on the surfaces of shell specimens driven by air flow to induce the shell hardening. The green-, fired-, residual-strength, high temperature self-weight deformation, and gas to permeability of the shell were investigated. The results showed that the peak strength reached 30.38 MPa for green shell and 10.61MPa for the fired shell, about 26.4% and 17.4% higher than the immersion method, respectively. The fracture morphology of the shell observed by SEM (Scanning Electron Microscopy) confirmed that the more uniform, and far less cracks and micropores formed on the sodium silicate film of shells hardened by microfluidic droplets than the dipping method. The analysis of FTIR (Fourier Transform Infrared Spectroscopy) reveals that the final products of sodium silicate gel cured by microfluidic droplets achieved a high degree of polymerization and generated a relatively dense Si–O–Si cellular structure. The phase composition and thermal stability of the shell were analyzed by XRD (X-ray Diffraction) and TG-DSC (Thermogravimetric Differential Scanning Calorimetry). The results demonstrate that the improvement in hardening performance of shells is due to reaction microfluidic technology that can precisely control the volume and rate of hardening agent droplets, which can improve the repeatability and stability of the reaction in a short time, as well as reduce the damage of the gel film during the hardening process, and improve the quality of the gel film. The resulting shell can achieve higher strength and stability. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of International Journal of Metalcasting is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s40962-024-01394-6 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 14 StartPage: 1448 Subjects: – SubjectFull: Chemical process control Type: general – SubjectFull: Fourier transform infrared spectroscopy Type: general – SubjectFull: Physical sciences Type: general – SubjectFull: Soluble glass Type: general – SubjectFull: Investment casting Type: general Titles: – TitleFull: Performance and Microstructural Features of Sodium Silicate Shell Cured via Microfluidic Droplets of Citric Acid Solution. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Yuan, Yujie – PersonEntity: Name: NameFull: Liu, Chang – PersonEntity: Name: NameFull: Chen, Zhijun – PersonEntity: Name: NameFull: Tian, Zhongxing – PersonEntity: Name: NameFull: Liu, Xiangdong IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 19395981 Numbering: – Type: volume Value: 19 – Type: issue Value: 3 Titles: – TitleFull: International Journal of Metalcasting Type: main |
| ResultId | 1 |
