Adv. Search
Journal of Inorganic Materials

Journal of Inorganic Materials >

2008 , Vol. 23 >Issue 2: 413 - 416

DOI: https://doi.org/10.3724/SP.J.1077.2008.00413

Research Paper

Influence of Initiator Systems on Gelation Process of Alumina Slurry

  • DONG Man-Jiang ,
  • ZHANG Zhao-Quan ,
  • LIU Qian
Expand
  • The State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China

Received date: 2007-04-10

  Revised date: 2007-07-13

  Online published: 2008-03-20

Fold

Abstract

The effect of initiator systems on the gelation process of alumina slurry was studied. The gel former system based on the free-radical polymerization of acrylimade(AM) and N,N’-menthylene-bis-acrylamide(MBAM) was used in gelcasting of alumina. Three initiator systems, ammonium persulfate(APS), ammonium persulfate and N,N,N’,N’,-tetramethylethylenediamine redox system (APS-TEMED), and 2,2’-Azobis[2-(2-imidazolin-2-yl)propane] dihydrochlorid(AZIP·2HCl), were used to initiate the polymerization of AM and MBAM. The effect of initiator systems on the polymerization process was investigated by the elastic modulus change during polymerization. Among these initiator systems, idle time of polymerization initiated by AZIP·HCl shows remarkable dependence on temperature while the elastic modulus of polymer gelled is slightly increased with increasing temperature from 40℃ to 50℃. Elastic modulus in gelation process of 50vol% alumina slurry initiated by ZIP·2HCl shows that both temperature and initiator concentration have strong effect on the gelation process, by which the gelation process can be controlled. Compared with gelation initiated by other initiators, gelation of 50vol% alumina slurry initiated by AZIP·2HCl gains modulus of 2.3×10 6Pa at 50℃, which is higher than these by APS(1.58×106Pa) at 55℃ and APS-TEMED(1.58×106Pa) at 25℃.

Key words： initiator systems; alumina; gelation process; gel-casting

Cite this article

DONG Man-Jiang , ZHANG Zhao-Quan , LIU Qian . Influence of Initiator Systems on Gelation Process of Alumina Slurry[J]. Journal of Inorganic Materials, 2008 , 23(2) : 413 -416 . DOI: 10.3724/SP.J.1077.2008.00413

References

[1] Omatete O O, Janney M A. J. Am. Ceram. Soc., 1991, 70 (10): 1641--1649.
[2] Omatete O O, Janney M A, Nunn S D. J. Eur. Ceram. Soc., 1997, 17 (2--3): 407--413.
[3] Chen Yali, Xie Zhipeng, Yang Jinlong, et al. J. Eur. Ceram. Soc., 1999, 19 (2): 271--275.
[4] 番祖仁. 自由基聚合. 北京: 化学工业出版社, 1983. 57--60.
[5] 陈九顺, 张贞浴, 张凤莲. 广州化工, 1996, 24 (2): 69--74.
[6] 董满江, 张兆泉, 刘 茜, 等. 广东化工, 2006, 33 (4). 27--30.
[7] 董满江, 张兆泉, 刘 茜, 等(DONG Man-Jiang, et al). 无机材料学报(Journal of Inorganic Materials), 2004, 19 (6): 1276--1281.
[8] Guilherme M R, et al. Reactive & Functional Polymers, 2004, 61 (2): 233--243.
[9] Moreno R, Salomoni A, Stamenkovic I. J. Eur. Ceram. Soc., 1997, 17 (2--3): 327--331.
[10] Janney M A, Omatete O O, et al. J. Am. Ceram. Soc., 1998, 81 (3): 581--591.
Options
Outlines

/

〈 〉