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材料导报  2021, Vol. 35 Issue (8): 8028-8033    https://doi.org/10.11896/cldb.20010106
  无机非金属及其复合材料 |
乳液基碳化硅纳米工作液的沉降稳定性、流变性与介电性
郭翠霞1,2, 吴张永1, 王航1, 朱启晨1, 邹应辉2
1 昆明理工大学机电工程学院,昆明 650500
2 四川轻化工大学机械工程学院,宜宾 644000
Sedimentation Stability, Rheological Properties and Dielectric Properties of Emulsion-based Silicon Carbide Nanometer Working Fluid
GUO Cuixia1,2, WU Zhangyong1,WANG Hang1, ZHU Qichen1, ZOU Yinghui2
1 Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500, China
2 Faculty of Mechanical Engineering, Sichuan University of Science & Engineering, Yibin 644000, China
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摘要 目前混粉电火花加工液添加的粉末粒径主要局限于微米级,与工作基液不能形成均匀、稳定的悬浮液。本研究以乳化液为基液,纳米碳化硅粉体(SiC)为分散相,十二烷基苯磺酸钠(SDBS)、羧甲基纤维素钠(CMC)等作分散剂,采用两步法制备了乳液基SiC纳米工作液,研究不同分散条件下SiC粉体在乳化液中的分散行为,分析了乳液基SiC纳米工作液的沉降稳定性、流变性和介电性。结果表明:质量分数为0.3%～0.6%的CMC对SiC纳米粒子的润湿、分散作用显著,而SDBS作用不明显;CMC分别与SDBS、SDS协同作用时,工作液均具有很好的沉降稳定性;当SDBS质量分数为0.3%,CMC为0.3%～0.6%时,工作液黏度呈非线性增加;当CMC质量分数为0.3%,SDBS为0.3%～1.4%时,工作液黏度先增大后快速降低;工作液电导率随CMC、SDBS分散剂质量分数的增加、液体温度的升高而增大。因此,当SiC质量分数为0.3%、添加0.3%～0.5%(质量分数)的CMC和0.3%～0.7%(质量分数)的SDBS,乳液基SiC纳米工作液有较好的沉降稳定性、流变性和介电性。
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郭翠霞
吴张永
王航
朱启晨
邹应辉
关键词:  乳化液  SiC纳米粉体  沉降稳定性  介电性  流变性  电火花线切割    
Abstract: At present, powder mixed electrical discharge machining (PMEDM) is mainly limited in the addition of powder particles size of micron in the working fluid cannot constitute a uniform and stable suspension. Emulsion based SiC nano working fluid is prepared by two-step method by emulsion as base fluid, nano SiC powder as dispersed phase, and SDBS, CMC,etc as dispersants. The dispersion behavior of SiC nanometer powder in the emulsion with different dispersion conditions is studied, which sedimentation stability, rheology and dielectric properties are analyzed. The results show that within the range of the CMC mass fraction of 0.3%—0.6%, the emulsion has a significant effect on the wetting and dispersion stability of SiC nanoparticles, while SDBS has no obvious effect. Under the synergistic effect of CMC and SDBS or SDS, the nano working fluid has good settlement stability. When SDBS mass fraction is 0.3% and CMC is 0.3%—0.6%, the viscosity of working fluid increases nonlinearly. When the CMC mass fraction is 0.3% and SDBS is at 0.3%—1.4%, the viscosity of the nano working fluid increase firstly and then decrease rapidly. The conductivity of the working fluid increases with the increase of the mass fraction of the dispersant and the temperature of the liquid. Therefore, when SiC mass fraction is 0.3%, CMC is at 0.3%—0.5%, and SDBS is at 0.3%—0.7%, the emulsion based SiC nano-working fluid have good sedimentation stability, rheological property and dielectric property.
Key words:  emulsion    SiC nano powder    sedimentation stability    dielectric properties    rheological properties    wire electrical discharge machining
               出版日期:  2021-04-25      发布日期:  2021-05-10
ZTFLH:  TB34  
基金资助: 国家自然科学基金(51165012);四川轻工大学大学生创新训练计划项目(S202010622097)
通讯作者:  zhyongwu63@163.com   
作者简介:  郭翠霞,四川轻化工大学副教授,硕士研究生导师。2018年入学在昆明理工大学机电工程学院攻读博士学位,主要围绕纳米材料,开展电火花线切割加工表面改性基础理论与应用研究。近年来,发表论文20余篇,申请国家发明专利8项,其中授权4项。
吴张永,昆明理工大学机电工程学院功能流体应用与矿山机电工程研究所,所长。1963 年 5 月生,1996 年获机械制造及自动化专业硕士学位,1996 年破格评为高级工程师,2004 年评为教授。主要研究方向为:水基液压传动技术、电液数字控制技术、新型液压介质、元件及系统。近年来,主持及参与完成科研项目 20 余项,发表论文 50 余篇,参编教材 1部、专著 1 部,获云南省科技进步一等奖 1 项、三等奖 2 项,获发明专利13 项、实用新型专利 60 余项。
引用本文:    
郭翠霞, 吴张永, 王航, 朱启晨, 邹应辉. 乳液基碳化硅纳米工作液的沉降稳定性、流变性与介电性[J]. 材料导报, 2021, 35(8): 8028-8033.
GUO Cuixia, WU Zhangyong,WANG Hang, ZHU Qichen, ZOU Yinghui. Sedimentation Stability, Rheological Properties and Dielectric Properties of Emulsion-based Silicon Carbide Nanometer Working Fluid. Materials Reports, 2021, 35(8): 8028-8033.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.20010106  或          http://www.mater-rep.com/CN/Y2021/V35/I8/8028
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