Preparation and Hydrophobic Properties of CaCO<sub>3</sub>/Wollastonite Composites

ZHANG Jun; WANG Yulian; TAN Ruilin; WANG Qihao; ZHU Yibin; LIU Jiayi; SHI Tianjiao; LIN Yongjin; TIAN Yidi; SU Sesheng; YUAN Zhigang

doi:10.13779/j.cnki.issn1001-0076.2022.04.011

2022 Vol. 42, No. 4

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Article navigation > Conservation and Utilization of Mineral Resources > 2022 > 42(4): 94-103

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ZHANG Jun, WANG Yulian, TAN Ruilin, WANG Qihao, ZHU Yibin, LIU Jiayi, SHI Tianjiao, LIN Yongjin, TIAN Yidi, SU Sesheng, YUAN Zhigang. Preparation and Hydrophobic Properties of CaCO3/Wollastonite Composites[J]. Conservation and Utilization of Mineral Resources, 2022, 42(4): 94-103. doi: 10.13779/j.cnki.issn1001-0076.2022.04.011

Citation:

ZHANG Jun, WANG Yulian, TAN Ruilin, WANG Qihao, ZHU Yibin, LIU Jiayi, SHI Tianjiao, LIN Yongjin, TIAN Yidi, SU Sesheng, YUAN Zhigang. Preparation and Hydrophobic Properties of CaCO₃/Wollastonite Composites[J]. Conservation and Utilization of Mineral Resources, 2022, 42(4): 94-103. doi: 10.13779/j.cnki.issn1001-0076.2022.04.011

Preparation and Hydrophobic Properties of CaCO₃/Wollastonite Composites

1.
School of Materials Science and Engineering, Shenyang Ligong University, Shenyang 110159, China
2.
Liaoning Province Ultra-high Power Graphite Electrode Material Professional Technology Innovation Center, Shenyang 110004, China

More Information

Corresponding author: WANG Yulian, ylwang0908@163.com

Received Date: 19 July 2022

Publish Date: 25 August 2022

Abstract

Abstract

CaCO₃/wollastonite (W@C) composites were prepared from natural wollastonite through one-step carbonization method, and the surface was organically modified. BET、XRD、SEM、FT-IR and TG-DSC were used to characterize the specific surface area of the composites and the phase composition morphology, group and thermal stability of the products before and after modification. The results showed that the W@C composites with a specific surface area of 15.28 m²/g was obtained when the amount of CaO added was 25%, the carbonization temperature was 15℃, the CO₂ flow rate was 0.08 m³/h, and the amount of polyethylene glycol (PEG) content was 4.37 g/L. The specific surface area of the obtained product was 500% higher than that of natural wollastonite. When the W@C composite was not modified, the contact angle was 19.37° and the activation index was 0. When the W@C composite was modified with 1.5% sodium stearate, the contact angle and activation index increased to 118.02° and 99.9%, respectively, and the hydrophobicity was significantly improved. Sodium stearate was coated on the surface of the W@C composites by physical adsorption.
- wollastonite /
- CaCO₃/wollastonite composites /
- one-step carbonization /
- organically modified

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References

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