CaCO<sub>3</sub>/硅灰石复合材料制备及其疏水性能研究

张俊; 王余莲; 谭瑞林; 王琪浩; 朱益斌; 刘珈伊; 时天骄; 林永瑾; 田伊笛; 苏德生; 袁志刚

doi:10.13779/j.cnki.issn1001-0076.2022.04.011

CaCO₃/硅灰石复合材料制备及其疏水性能研究

1.
沈阳理工大学, 材料科学与工程学院, 辽宁沈阳 110159

2.
辽宁省超高功率石墨电极材料专业技术创新中心, 辽宁丹东 118000

基金项目:
国家自然科学基金（51804200）：沈阳理工大学创新创业训练计划项目（202110144113）

详细信息

作者简介: 张俊(1997—), 男, 硕士研究生, 主要研究方向为矿物粉体表面改性研究, E-mail: zjw974977729@163.com

通讯作者: 王余莲(1986—)，女，博士，沈阳理工大学四级教授，硕士生导师，辽宁省“百千万人才工程”千人层次，省一流本科专业负责人，辽宁省颗粒学会理事；主要从事矿物材料制备与应用基础研究；主持国家级、省部级项目5项，千万元、百万元级别企业合作项目3项；发表学术论文40余篇；获国家授权发明专利4项，出版著作3部；获省级教学成果奖1项。
王余莲(1986—), 女, 博士, 副教授, 硕士生导师, 主要研究方向为矿物材料制备及其应用基础研究, E-mail: ylwang0908@163.com

中图分类号: TD985;TB332

收稿日期: 2022-07-19

刊出日期: 2022-08-25

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

摘要

摘要:
以天然硅灰石为原料，采用一步碳化法制得CaCO₃/硅灰石（W@C）复合材料，并对其表面进行有机改性。采用BET、XRD、SEM、FT-IR和TG-DSC等表征复合材料的比表面积以及改性前后产物的物相组成、形貌、基团和热稳定性。结果表明：当CaO添加量为25%、碳化温度为15℃、CO₂流速为0.08 m³/h、聚乙二醇用量为4.37 g/L时，可制得比表面积为15.28 m²/g的W@C复合材料，其比表面积比天然硅灰石提高了500%。W@C复合材料未改性时，接触角为19.37°，活化指数为0；采用1.5%硬脂酸钠改性W@C复合材料，接触角和活化指数分别增大至118.02°，99.9%，疏水性能显著提高。硬脂酸钠通过物理吸附包覆在W@C复合材料表面。
- 硅灰石 /
- CaCO₃/硅灰石复合材料 /
- 一步碳化法 /
- 有机改性
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

HTML全文

图 1 CaO用量对CaCO₃/硅灰石复合材料比表面积影响的曲线

Figure 1.

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图 2 天然硅灰石与CaCO₃/硅灰石复合材料的XRD图谱

Figure 2.

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图 3 碳化温度对CaCO₃/硅灰石复合材料比表面积影响的曲线

Figure 3.

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图 4 CO₂流速对CaCO₃/硅灰石复合材料比表面积影响的曲线

Figure 4.

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图 5 PEG对CaCO₃/硅灰石复合材料比表面积影响的曲线

Figure 5.

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图 6 CaCO₃/硅灰石复合材料包覆前后的SEM图

Figure 6.

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图 7 CaCO₃/硅灰石复合材料面扫描区域及元素分布

Figure 7.

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图 8 CaCO₃/硅灰石复合材料的SEM-EDS图

Figure 8.

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图 9 改性前CaCO₃/硅灰石复合材料的接触角

Figure 9.

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图 10 硬脂酸钠用量对改性后CaCO₃/硅灰石复合材料接触角及活化指数的影响曲线

Figure 10.

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图 11 改性前后CaCO₃/硅灰石复合材料的XRD谱

Figure 11.

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图 12 改性前后CaCO₃/硅灰石复合材料的红外光谱

Figure 12.

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图 13 改性前后CaCO₃/硅灰石复合材料的TG-DSC曲线

Figure 13.

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图 14 硬脂酸钠改性CaCO₃/硅灰石复合材料前后的SEM图像

Figure 14.

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表 1 CaCO₃/硅灰石复合材料点扫描区域的元素含量

Table 1. Elemental contents in point scanning region of CaCO₃/wollastonite composites

Element Quality score/% Atomic ratio/%

C 17.47 26.40

O 52.37 59.42

Si 2.65 1.71

Ca 27.51 12.46

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表 2 改性剂种类对改性后CaCO₃/硅灰石复合材料接触角及活化指数的影响

Table 2. Effects of modifier types on contact angle and activation index of modified CaCO₃/wollastonite composites

Types of modifiers Contact angle/(°) Activation index/%

-- 19.37 0

KH-550 23.28 0

KH-570 31.17 0.21

YZSX 112.76 99.70

YZSN 118.02 99.90

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Element	Quality score/%	Atomic ratio/%
C	17.47	26.40
O	52.37	59.42
Si	2.65	1.71
Ca	27.51	12.46

Types of modifiers	Contact angle/(°)	Activation index/%
--	19.37	0
KH-550	23.28	0
KH-570	31.17	0.21
YZSX	112.76	99.70
YZSN	118.02	99.90

CaCO3/硅灰石复合材料制备及其疏水性能研究

1. 沈阳理工大学, 材料科学与工程学院, 辽宁 沈阳 110159 2. 辽宁省超高功率石墨电极材料专业技术创新中心, 辽宁 丹东 118000

作者简介: 张俊(1997—), 男, 硕士研究生, 主要研究方向为矿物粉体表面改性研究, E-mail: zjw974977729@163.com

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

Corresponding author: WANG Yulian, ylwang0908@163.com

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CaCO₃/硅灰石复合材料制备及其疏水性能研究

1.
沈阳理工大学, 材料科学与工程学院, 辽宁沈阳 110159

2.
辽宁省超高功率石墨电极材料专业技术创新中心, 辽宁丹东 118000

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