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大分子偶联剂KH570-g-PLA改性绢云母的制备与表征

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张震, 胡应模, 庞宝宝, 武莎莎, 崔奎, 郭素芳. 大分子偶联剂KH570-g-PLA改性绢云母的制备与表征[J]. 矿产保护与利用, 2022, 42(4): 45-50. doi: 10.13779/j.cnki.issn1001-0076.2022.04.005
引用本文: 张震, 胡应模, 庞宝宝, 武莎莎, 崔奎, 郭素芳. 大分子偶联剂KH570-g-PLA改性绢云母的制备与表征[J]. 矿产保护与利用, 2022, 42(4): 45-50. doi: 10.13779/j.cnki.issn1001-0076.2022.04.005
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ZHANG Zhen, HU Yingmo, PANG Baobao, WU Shasha, CUI Kui, GUO Sufang. Preparation and Characterization of Sericite Modified by Macromolecular Coupling Agent KH570-g-PLA[J]. Conservation and Utilization of Mineral Resources, 2022, 42(4): 45-50. doi: 10.13779/j.cnki.issn1001-0076.2022.04.005
Citation: ZHANG Zhen, HU Yingmo, PANG Baobao, WU Shasha, CUI Kui, GUO Sufang. Preparation and Characterization of Sericite Modified by Macromolecular Coupling Agent KH570-g-PLA[J]. Conservation and Utilization of Mineral Resources, 2022, 42(4): 45-50. doi: 10.13779/j.cnki.issn1001-0076.2022.04.005
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大分子偶联剂KH570-g-PLA改性绢云母的制备与表征

  • 1.

    中国地质大学(北京) 材料科学与工程学院, 北京 100083

  • 2.

    非金属矿物和固废资源材料化利用北京市重点实验室, 北京 100083

  • 3.

    岩石矿物材料国家专业实验室, 北京 100083

详细信息
    作者简介: 张震(1997—)，男，硕士，主要研究方向为矿物材料表面改性及其功能复合材料制备; 胡应模，男，教授，博士生导师，于中国地质大学(北京)材料科学与工程学院材料化学教研室从事教学与科研工作，主要研究方向包括矿物材料的表面改性及其功能复合材料的制备与表征、高分子材料及其复合材料的开发及利用以及工业固废及尾矿的综合利用等，累计发表论文130余篇，其中SCI及EI收录60篇
    通讯作者: 胡应模(1964—)，男，教授，博士生导师，主要研究方向为矿物材料改性和高分子复合材料，E-mail：huyingmo@cugb.edu.cn

  • 中图分类号: TD985

Preparation and Characterization of Sericite Modified by Macromolecular Coupling Agent KH570-g-PLA

  • 1.

    School of Materials Science and Technology, China University of Geosciences(Beijing), Beijing 100083, China

  • 2.

    Beijing Key Laboratory of Material Utilization of Nonmetallic Minerals and Solid Waste Resources, Beijing 100083, China

  • 3.

    National Laboratory of Rock and Mineral Materials, Beijing 100083, China

More Information

    摘要

  • 采用"一步法"复合改性工艺制备大分子偶联剂KH570-g-PLA改性绢云母，以改性前后绢云母的浊度和接触角为参数对绢云母表面改性工艺进行优化，考察了改性剂用量、反应时间和反应温度对绢云母表面改性效果的影响。试验结果表明，KH570-g-PLA改性绢云母的最佳工艺条件为聚乳酸（PLA）用量10%、反应温度110℃、反应时间4 h，此时其浊度为809 NTU，接触角为66°。相比未改性绢云母，浊度提高196%，接触角提高285%。测试分析表明，大分子偶联剂KH570-g-PLA被成功偶联到绢云母表面，KH570-g-PLA改性绢云母的晶体片径变小，团聚现象减弱，分散性和疏水性提高，结晶度降低，耐热温度约为705℃。

    The macromolecular coupling agent KH570-g-PLA modified sericite were prepared by one-step composite modification process. The effects on the sericite surface modification efficiency of modifier dosage, reaction time and reaction temperature were investigated with the parameters of turbidity, and contact angle of sericite before and after modification, and the optimizational surface modification conditions of sericite were obtained.The optimal technological conditions of KH570-g-PLA modified sericite were that the 10% of PLA was reacted with sericite at 110℃ for 4 h. The turbidity is 809 NTU and the contact Angle is 66°. Compared with unmodified sericite, its turbidity increased by 196%, and contact angle increased by 285%. The coupling agent KH570-G-PLA was successfully coupled to the surface of sericite. And the KH570-g-PLA modified sericite had a smaller crystal size, seldom agglomeration phenomenon, better dispersibility and hydrophobicity, lower crystallinity and the higher heat resistance temperature (about 705℃).

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  • 图 1  KH570-g-PLA改性绢云母机理

    Figure 1. 

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    图 2  PLA用量对绢云母改性效果的影响

    Figure 2. 

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    图 3  反应温度对绢云母改性效果的影响

    Figure 3. 

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    图 4  反应时间对绢云母改性效果的影响

    Figure 4. 

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    图 5  绢云母改性前后扫描电镜分析(a改性前；b改性后)

    Figure 5. 

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    图 6  绢云母改性前后红外光谱分析(IR)

    Figure 6. 

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    图 7  绢云母改性前后X射线衍射分析(XRD)

    Figure 7. 

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    图 8  绢云母改性前后热重分析(TG)

    Figure 8. 

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    表 1  绢云母改性前后粒度分析

    Table 1.  Size analysis of sericite before and after modification

    Size analysi d50/μm d90/μm Middiameter/μm BET/(m2·g-1)
    Unmodified 27.10 72.74 5.908 0.133
    Modified 23.76 67.59 4.853 0.157
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收稿日期:  2022-04-14
刊出日期:  2022-08-25

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