耐火材料 ›› 2023, Vol. 57 ›› Issue (2): 117-120.DOI: 10.3969/j.issn.1001-1935.2023.02.006

• 研究开发 • 上一篇    下一篇

水热法制备氢氧化镁改性鳞片石墨

周瑞琪, 范慧琳, 王智明, 蔡伟杰, 段红娟, 张海军   

  1. 武汉科技大学 省部共建耐火材料与冶金国家重点实验室 湖北武汉 430081
  • 收稿日期:2022-07-12 出版日期:2023-04-15 发布日期:2023-04-17
  • 作者简介:周瑞琪:男,2001年生,本科生。E-mail:2735738790@qq.com
  • 基金资助:
    国家自然科学基金面上项目(52072274,51872210);先进耐火材料国家重点实验室开放课题(SKLAR202106);大学生创新创业训练计划项目(21ZA011)。

Modification of flake graphite with magnesium hydroxide by hydrothermal method

Zhou Ruiqi, Fan Huilin, Wang Zhiming, Cai Weijie, Duan Hongjuan, Zhang Haijun   

  1. First author’s address: The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China
  • Received:2022-07-12 Online:2023-04-15 Published:2023-04-17

摘要: 为了提高鳞片石墨的水润湿性,以无水硫酸镁和氨水为主要原料,采用水热法在鳞片石墨表面生成氢氧化镁改性层,主要研究了表面活性剂种类(十二烷基苯磺酸钠、聚丙烯酸钠),水热温度(180、190、200 ℃),C、Mg2+质量比(1∶10、2∶10、3∶10)对改性鳞片石墨水润湿性和抗氧化性的影响。结果表明:1)改性石墨表面生成了片状氢氧化镁包覆层,其水润湿性和抗氧化性提高。2)以聚丙烯酸钠为表面活性剂,采用3∶10的C、Mg2+质量比,在190 ℃水热处理12 h,制得的改性石墨的水润湿性和抗氧化性最好。

关键词: 鳞片石墨, 水热法, 表面改性, 水润湿性, 抗氧化性

Abstract: In order to improve the water wettability of flake graphite,a magnesium hydroxide modified layer was coated on the surface of flake graphite by the hydrothermal method with anhydrous magnesium sulfate and ammonia as the main raw materials.The effects of the surfactant types (sodium dodecyl benzene sulfonate and sodium polyacrylate),the hydrothermal temperature (180,190,and 200 ℃) and the mass ratio of C to Mg2+ (1∶10,2∶10,and 3∶10) on the water wettability and the oxidation resistance of modified flake graphite were mainly studied.The results show that:(1)magnesium hydroxide is coated on the surface of the modified flake graphite,improving its water wettability and oxidation resistance;(2)the modified flake graphite prepared with sodium polyacrylate as the surfactant,the C/Mg2+ mass ratio of 3∶10,and the hydrothermal treatment at 190 ℃ for 12 h has the best water wettability and oxidation resistance.

Key words: flake graphite, hydrothermal method, surface modification, water wettability, oxidation resistance

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