| 聚丙烯酸对水基磁流变液稳定性的改良 |
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| 引用本文： | 李发胜,唐龙,刘奇,江岸,张平.聚丙烯酸对水基磁流变液稳定性的改良[J].功能材料,2007,38(5):717-720. |
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| 作者姓名： | 李发胜 唐龙 刘奇 江岸 张平 |
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| 作者单位： | 西南大学,材料科学与工程学院,重庆,400715;国家仪表功能材料工程技术研究中心,重庆,400700;重庆仪表材料研究所,重庆,400700;重庆大学,城市建设与环境工程学院,重庆,400044 |
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| 基金项目： | 国家高技术研究发展计划(863计划)
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重庆市科技攻关项目 |
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| 摘 要： | 以羰基铁粉为悬浮介质、水为分散介质的悬浮液中加入聚丙烯酸(PAA),分别测量不同条件下悬浮液的电泳淌度及吸光度随时间的变化.结果表明,磁性颗粒对聚丙烯酸分子的吸附,增加了其表面电势,颗粒之间的静电斥力阻碍了团聚的发生,提高了体系的抗团聚、抗沉降稳定性.同时也研究了pH值及PAA浓度对悬浮液稳定性的影响.
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| 关 键 词： | 聚丙烯酸 水基磁流变液 电泳淌度 表面电势 |
| 文章编号： | 1001-9731(2007)05-0717-04 |
| 修稿时间： | 2006-05-16 |
The improvement of stabilization of aqueous magnetorheological by polyacrylic acids |
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| LI Fa-sheng,TANG Long,LIU Qi,JIANG An,ZHANG Ping.The improvement of stabilization of aqueous magnetorheological by polyacrylic acids[J].Journal of Functional Materials,2007,38(5):717-720. |
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| Authors: | LI Fa-sheng TANG Long LIU Qi JIANG An ZHANG Ping |
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| Affiliation: | 1. School of Material Science and Engineering, Southwest University, Chongqing 400715, China; National Instrumem Functional Materials Engineering Technique Research Center, Chongqing 400700, China; 3. Chongqing Instruments Materials Research Institute, Chongqing 400700, China |
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| Abstract: | This work is devoted to the stabilization of magnetorheological suspensions constituted by micrometer-sized magnetite spheres in aqueous media,by adding the polyacrylic acids(PAA).The electrophoretic mobility and optical absorbance as a function of time of magnetite were measured in different conditions.The results show that the magnetite particle's surface potential can increase by adsorbing the polyacrylic,electricity repulsion between the particle hinders the reuniting of the magnetized particle,the anti-aggregation and anti-sedimentation of magnetorheological suspensions were enhanced.At the same time,the effect of pH and PAA's concentration to the stabilization of magnetize suspensions were researched. |
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| Keywords: | polyacrylic acids aqueous magnetorheological fluids electrophoretic mobility surface potential |
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