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[1] Shen Xuyan, Feng Pan, Zhang Qi, et al. Synthesis and thermal characterization of the C-S-H/paraffin composite phase change material utilizing a discontinuous two-step nucleation method [J]. Journal of Southeast University (English Edition), 2024, 40 (4): 327-335. [doi:10.3969/j.issn.1003-7985.2024.04.001]
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Synthesis and thermal characterization of the C-S-H/paraffin composite phase change material utilizing a discontinuous two-step nucleation method()
基于非连续两步成核的C-S-H/paraffin 相变材料制备及储热性能
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
40
Issue:
2024 4
Page:
327-335
Research Field:
Materials Sciences and Engineering
Publishing date:
2024-12-03

Info

Title:
Synthesis and thermal characterization of the C-S-H/paraffin composite phase change material utilizing a discontinuous two-step nucleation method
基于非连续两步成核的C-S-H/paraffin 相变材料制备及储热性能
Author(s):
Shen Xuyan1;  Feng Pan1;  2;  Zhang Qi1
1School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
2State Key Laboratory of High Performance Civil Engineering Materials, Nanjing 210008, China
沈叙言1;  冯攀1;  2;  张琪1
1东南大学材料科学与工程学院, 南京 211189; 2高性能土木工程材料国家重点实验室, 南京 210008
Keywords:
two-step nucleation;  C-S-H;  paraffin;  phase change materials;  composite;  building thermal management
两步成核;  C-S-H;  石蜡;  相变材料;  复合材料;  建筑热管理
PACS:
TU506
DOI:
10.3969/j.issn.1003-7985.2024.04.001
Abstract:
The novel calcium-silicate-hydrate(C-S-H)/paraffin composite phase change materials were synthesized using a discontinuous two-step nucleation method. Initially, the C-S-H precursor is separated and dried, followed by immersion in an aqueous environment to transform it into C-S-H. This two-step nucleation approach results in C-S-H with a specific surface area of 497.2 m2/g, achieved by preventing C-S-H foil overlapping and refining its pore structure. When impregnated with paraffin, the novel C-S-H/paraffin composite exhibits superior thermal properties, such as a higher potential heat value of 148.3 J/g and an encapsulation efficiency of 81.6%, outperforming conventional C-S-H. Moreover, the composite material demonstrates excellent cyclic performance, indicating its potential for building thermal storage compared to other paraffin-based composites. Compared with the conventional method, this simple technology, which only adds conversion and centrifugation steps, does not negatively impact preparation costs, the environment, and resource consumption. This study provides valuable theoretical insights for designing thermal storage concrete materials and advancing building heat management.
通过非连续式的两步成核方法制备了新型C-S-H/石蜡相变材料, 即在前驱体形成后将其分离并干燥, 重新置于水中转化为C-S-H.由于解决了C-S-H箔片的相互遮盖问题以及孔径的大幅细化, 通过非连续式两步成核方法制备的C-S-H比表面积高达497.2 m2/g.与常规方法制备的C-S-H相比, 在浸渍石蜡后, C-S-H/paraffin复合材料具有更高的潜热值(148.3 J/g)和更高的封装效率(81.6%), 并显示出良好的循环性能.相比其他石蜡基的相变储能材料, 这种新方法制备的C-S-H材料在封装效率和潜热值上展现出明显优势.该方法工艺简单, 相比常规方法仅增加了一次转化和离心, 成本的提高可以忽略, 同时对环境、资源无负面影响.该研究对相变混凝土、建筑热管理等技术具有理论指导意义.

References:

[1] Fang Y L, Zhang X S, Liu C. Experimental study of lightweight radiant floor heating system with non-full-coverage heat-conducting plate[J]. Journal of Southeast University(Natural Science Edition), 2022, 52(6): 1104-1113. DOI:10.3969/j.issn.1001-0505.2022.06.010. (in Chinese)
[2] Cabeza L F, Castellón C, Nogués M, et al. Use of microencapsulated PCM in concrete walls for energy savings[J]. Energy and Buildings, 2007, 39(2): 113-119. DOI: 10.1016/j.enbuild.2006.03.030.
[3] Shen Y L, Liu S L, Zeng C, et al. Experimental thermal study of a new PCM-concrete thermal storage block(PCM-CTSB)[J]. Construction and Building Materials, 2021, 293: 123540. DOI: 10.1016/j.conbuildmat.2021.123540.
[4] Erdogmus E, Yaras A, Ustaoglu A, et al. Thermal performance analysis of novel foam concrete composites with PCM for energy storage and environmental benefits in buildings[J]. Energy and Buildings, 2023, 296: 113413. DOI: 10.1016/j.enbuild.2023.113413.
[5] Liu B, Pan G H, Gao M, et al. Influence of grinding aid on the grinding effect of iron tailings and hydration properties of blended cement[J].Journal of Southeast University(Natural Science Edition), 2022, 52(5): 907-916. DOI:10.3969/j.issn.1001-0505.2022.05.011. (in Chinese)
[6] Wang P G, Fu H, Li G G, et al. Effects of Nano-C-S-H-PCE on performance of C50 non-steam cured concrete for coastal subway segment[J]. Journal of Southeast University(Natural Science Edition), 2022, 52(2): 254-262. DOI:10.3969/j.issn.1001-0505.2022.02.007. (in Chinese)
[7] Jiang J Y, Zheng Q, Yan Y R, et al. Design of a novel nanocomposite with C-S-H@LA for thermal energy storage: A theoretical and experimental study[J].Applied Energy, 2018, 220: 395-407. DOI: 10.1016/j.apenergy.2018.03.134.
[8] Shamsaei E, de Souza F B, Fouladi A, et al. Graphene oxide-based mesoporous calcium silicate hydrate sandwich-like structure: Synthesis and application for thermal energy storage[J]. ACS Applied Energy Materials, 2022, 5(1): 958-969. DOI: 10.1021/acsaem.1c03356.
[9] Shen X Y, Feng P, Zhang Q, et al. Toward the formation mechanism of synthetic calcium silicate hydrate(C-S-H)-pH and kinetic considerations[J].Cement and Concrete Research, 2023, 172: 107248. DOI: 10.1016/j.cemconres.2023.107248.
[10] Sowoidnich T, Damidot D, Ludwig H M, et al. The nucleation of C-S-H via prenucleation clusters[J]. The Journal of Chemical Physics, 2023, 158(11): 114309. DOI: 10.1063/5.0141255.
[11] Liu Z M, Shao C Y, Jin B, et al. Crosslinking ionic oligomers as conformable precursors to calcium carbonate[J].Nature, 2019, 574(7778): 394-398. DOI: 10.1038/s41586-019-1645-x.
[12] Shen X Y, Feng P, Liu X, et al.New insights into the non-classical nucleation of C-S-H[J]. Cement and Concrete Research, 2023, 168: 107135. DOI: 10.1016/j.cemconres.2023.107135.
[13] Salunkhe P B, Shembekar P S. A review on effect of phase change material encapsulation on the thermal performance of a system[J]. Renewable and Sustainable Energy Reviews, 2012, 16(8): 5603-5616. DOI: 10.1016/j.rser.2012.05.037.
[14] Matsuyama H, Young J F. Effects of pH on precipitation of quasi-crystalline calcium silicate hydrate in aqueous solution[J].Advances in Cement Research, 2000, 12(1): 29-33. DOI: 10.1680/adcr.2000.12.1.29.
[15] Liu X, Feng P, Li W, et al. Effects of pH on the nano/micro structure of calcium silicate hydrate(C-S-H)under sulfate attack[J].Cement and Concrete Research, 2021, 140: 106306. DOI: 10.1016/j.cemconres.2020.106306.
[16] Wu Y J, Sha S L, Liu H Y, et al. Variable temperature infrared spectroscopy of paraffin[J]. Measurement Technique, 2020, 3:5-10.(in Chinese)
[17] Niculescu O, Leca M, Moldovan Z, et al. Obtaining and characterization of an ecologic wax emulsions for finishing natural leathers and furs[J].Revista De Chimie, 2015, 66(8): 1173-1176.
[18] Zhao G, Zhu B D, Zou N N, et al. Research progress of paraffin-based microencapsulated phase change materials[J]. Polymer Bulletin, 2023, 36(9): 1136-1146. DOI:10.14028/j.cnki.1003-3726.2023.09.003. (in Chinese)
[19] Han S J, Chen Y P, Lü S Y, et al. Effects of processing conditions on the properties of paraffin/melamine-urea-formaldehyde microcapsules prepared by in situ polymerization[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2020, 585: 124046. DOI: 10.1016/j.colsurfa.2019.124046.
[20] Huo J H, Peng Z G, Feng Q. Synthesis and properties of microencapsulated phase change material with a urea-formaldehyde resin shell and paraffin wax core[J].Journal of Applied Polymer Science, 2020, 137(16): e48578. DOI: 10.1002/app.48578.
[21] Wan X, Zhang H Y, Chen C, et al. Synthesis and characterization of phase change materials microcapsules with paraffin core/cross-linked hybrid polymer shell for thermal energy storage[J].Journal of Energy Storage, 2020, 32: 101897. DOI: 10.1016/j.est.2020.101897.
[22] Zhang Q Q, Sun Z C, Li G M, et al. Preparation and printing application of paraffin@silica phase change microcapsules[J]. Digital Printing, 2021, 3: 85-91. DOI:10.19370/j.cnki.cn10-1304/ts.2021.03.008. (in Chinese)
[23] Ma X C, Liu Y J, Liu H, et al. Synthesis and characterization of microencapsulated paraffin with TiO2 shell as thermal energy storage materials[J]. Journal of Materials Science: Materials in Electronics, 2018, 29(17): 15241-15248. DOI: 10.1007/s10854-018-9666-z.
[24] Shi J, Wu X L, Sun R, et al. Synthesis and performance evaluation of paraffin microcapsules with calcium carbonate shell modulated by different anionic surfactants for thermal energy storage[J].Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2019, 571: 36-43. DOI: 10.1016/j.colsurfa.2019.03.029.
[25] Zhuang X H, Zhang Y, Cai C, et al. Design the magnetic microencapsulated phase change materials with poly(MMA-MAA)@ n-octadecane modified by Fe3O4[J]. Scientific Reports, 2018, 8(1): 16379. DOI: 10.1038/s41598-018-34583-5.

Memo

Memo:
Biographies: Shen Xuyan(1997—), male, Ph.D. candidate; Feng Pan(corresponding author), female, doctor, professor, pan.feng@seu.edu.cn.
Foundation items: The National Natural Science Foundation of China(No. 52122802, 52078126), Jiangsu Provincial Department of Science and Technology Innovation Support Program(No. BK20222004, BZ2022036).
Citation: Shen Xuyan, Feng Pan, Zhang Qi.Synthesis and thermal characterization of the C-S-H/paraffin composite phase change material utilizing a discontinuous two-step nucleation method[J].Journal of Southeast University(English Edition), 2024, 40(4):327-335.DOI:10.3969/j.issn.1003-7985.2024.04.001.
Last Update: 2024-12-20