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硬脂酸-钛酸酯偶联剂复合改性天然重晶石研究

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文章导航 > 矿产保护与利用 > 2022 > 42(4): 51-59

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朱福生, 冯晓琴, 王家奎, 杨振, 高锋, 符远翔, 黄宏升. 硬脂酸-钛酸酯偶联剂复合改性天然重晶石研究[J]. 矿产保护与利用, 2022, 42(4): 51-59. doi: 10.13779/j.cnki.issn1001-0076.2022.04.006
引用本文: 朱福生, 冯晓琴, 王家奎, 杨振, 高锋, 符远翔, 黄宏升. 硬脂酸-钛酸酯偶联剂复合改性天然重晶石研究[J]. 矿产保护与利用, 2022, 42(4): 51-59. doi: 10.13779/j.cnki.issn1001-0076.2022.04.006
shu
ZHU Fusheng, FENG Xiaoqin, WANG Jiakui, YANG Zhen, GAO Feng, FU Yuanxiang, HUANG Hongsheng. Study on Composite Modification of Natural Barite of Stearic Acid Titanate Coupling Agent[J]. Conservation and Utilization of Mineral Resources, 2022, 42(4): 51-59. doi: 10.13779/j.cnki.issn1001-0076.2022.04.006
Citation: ZHU Fusheng, FENG Xiaoqin, WANG Jiakui, YANG Zhen, GAO Feng, FU Yuanxiang, HUANG Hongsheng. Study on Composite Modification of Natural Barite of Stearic Acid Titanate Coupling Agent[J]. Conservation and Utilization of Mineral Resources, 2022, 42(4): 51-59. doi: 10.13779/j.cnki.issn1001-0076.2022.04.006
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硬脂酸-钛酸酯偶联剂复合改性天然重晶石研究

  • 1.

    贵州理工学院 化学工程学院, 贵州 贵阳 550003

  • 2.

    贵州省普通高等学校能源化学特色重点实验室, 贵州 贵阳 550003

  • 基金项目:
    贵州省教育厅高校自然科学研究项目（黔教合KY字[2017]009）；贵州理工学院高层次人才科研启动项目（XJGC2019614）；国家级大学生创新创业训练项目（202014440072）
详细信息
    作者简介: 朱福生(1999—)，男，四川资阳人，学士，主要从事重晶石变白及表面改性研究，E-mail: 2437250390@qq.com; 黄宏升(1982—)，男，博士，教授，硕士生导师。主要从事无机功能材料合成及其性能研究，重晶石与磷矿资源综合利用，为贵州省能源化学特色重点实验室负责人。主持各级各类科研项目6项(其中国家自然科学基金2项)，发表SCI、EI论文近20篇
    通讯作者: 黄宏升(1982—)，男，湖南怀化人，博士研究生，教授，主要从事无机功能材料研究，E-mail: 36959784@qq.com

  • 中图分类号: TD985

Study on Composite Modification of Natural Barite of Stearic Acid Titanate Coupling Agent

  • 1.

    School of Chemical Engineering, Guizhou Institute of Technology, Guiyang 550003, Guizhou, China

  • 2.

    Key Laboratory of Energy Chemistry for General Higher Education in Guizhou Province, Guiyang 550003, Guizhou, China

More Information

    摘要

  • 采用湿式机械力化学法，以硬脂酸和钛酸酯偶联剂为复合改性剂对贵州产天然重晶石进行改性。考察了球磨时间、球磨转速、球料质量比、复合改性剂用量及改性剂质量配比对重晶石改性效果的影响。通过FTIR、XRD、SEM、TEM、TG对改性前后重晶石的物相结构、形貌特征和包覆情况进行了研究。结果表明，经过单因素试验得到最佳工艺条件为：球磨时间为2 h、球磨转速为800 r/min、球料质量比（介质球/重晶石）为4 GA6FA 1、复合改性剂用量为2%、改性剂质量配比（硬脂酸/钛酸酯偶联剂）为2 GA6FA 1。改性后改性剂成功地化学键合在重晶石表面。与未改性重晶石相比，改性重晶石的平均粒径减小，分散性增强，晶体结构未发生明显的变化。改性后重晶石的接触角从39.07°增大到150.95°，固体表面自由能从18.62 mJ/m2变化到0.72 mJ/m2，改性后重晶石具有较好的超疏水性，可作为制备超疏水涂层材料的原料。

    Using stearic acid and titanate coupling agent as composite modifier, the natural barite powder produced in Guizhou was modified by wet mechanochemical method. The effects of process conditions such as ball milling time, ball milling speed, mass ratio of ball to material, dosage of compound modifier, and mass ratio of modifier on the properties of modified barite were studied. The phase structure, morphological characteristics and coating of barite before and after modification were characterized by FT-IR、XRD、SEM、TEM and TG. The results show that the optimal process conditions are obtained through single factor experiments: the ball milling time is 2 h, the ball milling speed is 800 r/min, the mass ratio of ball to material (ball/barite) is 4 GA6FA 1, the dosage of compound modifier is 2.0% (modifier/barite), and the mass ratio of modifier (stearic acid/titanate coupling agent) is 2 GA6FA 1. After modification, the modifier was successfully chemically bonded to the barite surface. Compared with the unmodified barite, the average particle size of the modified barite is reduced, the dispersibility is enhanced, and the crystal structure does not change significantly. The modified barite's contact angle changes from 39.07° to 150.95°, and the solid surface free energy changes from 18.62 mJ/m2 to 0.72 mJ/m2. The modified barite has better superhydrophobicity and can be used as a raw material for preparing superhydrophobic coating materials.

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  • 图 1  湿式机械力化学改性天然重晶石流程

    Figure 1. 

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    图 2  球磨时间对改性效果的影响

    Figure 2. 

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    图 3  球料质量比对改性效果的影响

    Figure 3. 

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    图 4  球磨转速对改性效果的影响

    Figure 4. 

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    图 5  复合改性剂用量对改性效果的影响

    Figure 5. 

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    图 6  硬脂酸和钛酸酯偶联剂的配比对改性效果的影响

    Figure 6. 

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    图 7  样品的FTIR谱图：(a)未改性的天然重晶石；(b)硬脂酸和钛酸酯偶联剂复合改性后的天然重晶石；(c)硬脂酸；(d)钛酸酯偶联剂

    Figure 7. 

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    图 8  硬脂酸和钛酸酯偶联剂复合改性重晶石机理

    Figure 8. 

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    图 9  样品的XRD图：(a)未改性的天然重晶石；(b)硬脂酸和钛酸酯偶联剂复合改性后的天然重晶石

    Figure 9. 

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    图 10  样品的选区电子衍射花样与高分辨图：(a)未改性的天然重晶石；(b)硬脂酸和钛酸酯偶联剂复合改性后的天然重晶石

    Figure 10. 

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    图 11  样品的SEM图：(a)未改性的天然重晶石；(b)硬脂酸和钛酸酯偶联剂复合改性后的天然重晶石

    Figure 11. 

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    图 12  样品的TEM图：(a)未改性的天然重晶石；(b)硬脂酸和钛酸酯偶联剂复合改性后的天然重晶石

    Figure 12. 

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    图 13  样品的TG图：(a)未改性的天然重晶石；(b)硬脂酸和钛酸酯偶联剂复合改性后的天然重晶石

    Figure 13. 

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收稿日期:  2022-04-06
刊出日期:  2022-08-25

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