[1]彭家惠,瞿金东,张建新,等.丁二酸对α半水脱硫石膏晶体生长习性与晶体形貌的影响[J].东南大学学报(自然科学版),2011,41(6):1307-1312.[doi:10.3969/j.issn.1001-0505.2011.06.033]
 Peng Jiahui,Qu Jindong,Zhang Jianxin,et al.Effect of succinic acid on crystalgrowing habit and crystal morphology of α-hemihydrate desulfogypsum[J].Journal of Southeast University (Natural Science Edition),2011,41(6):1307-1312.[doi:10.3969/j.issn.1001-0505.2011.06.033]
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丁二酸对α半水脱硫石膏晶体生长习性与晶体形貌的影响()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
41
期数:
2011年第6期
页码:
1307-1312
栏目:
材料科学与工程
出版日期:
2011-11-20

文章信息/Info

Title:
Effect of succinic acid on crystalgrowing habit and crystal morphology of α-hemihydrate desulfogypsum
作者:
彭家惠1瞿金东2张建新1刘红霞1邹辰阳1 
(1重庆大学材料科学与工程学院,重庆 400045)
(2重庆大学城市建设与环境工程学院,重庆 400045)
Author(s):
Peng Jiahui1Qu Jindong2Zhang Jianxin1Liu Hongxia1Zou Chenyang1
(1 College of Materials Science and Engineering, Chongqing University, Chongqing 400045,China)
(2 College of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045,China)
关键词:
α半水脱硫石膏 丁二酸 晶体形貌 晶体生长习性
Keywords:
α-hemihydrate desulfurization gypsum succinic acid crystal morphology crystalgrowing habit
分类号:
TU526
DOI:
10.3969/j.issn.1001-0505.2011.06.033
摘要:
采用扫描电镜、显微红外分析仪和X光电子能谱研究了丁二酸对α半水脱硫石膏晶体生长习性与形貌的影响,从晶体生长角度分析了丁二酸的晶形调节作用机理.结果表明:丁二酸显著改变了α半水脱硫石膏晶体的生长习性,使其由长棒状转变为短柱状或片状,且晶体发育更完整,晶体尺度变大; 控制丁二酸的掺量,可制备长径比为1:1的短柱状α半水脱硫石膏晶体; 通过羟基与Ca2+络合作用,丁二酸选择吸附在α半水脱硫石膏的(111)面,抑制其在c轴方向生长,使晶体沿c轴生长的比较优势被削弱或逆转,从而改变了晶面在不同轴向的相对生长速率,使α半水脱硫石膏晶体生长习性和形貌发生改变; 丁二酸降低α半水石膏晶体生长速率,晶体生长发育的时间更充分,导致晶体尺度增大.
Abstract:
Effect of succinic acid on the crystalline growth habit and crystal morphology of α-hemihydrate desulfogypsum was investigated. Furthermore, by use of SEM(scanning electron microscope), micro-FTIR(microscopic Fourier transform infrared spectrum analyzer) and XPS (X-ray photoelectron spectroscopy analysis)technique, its crystal modifying mechanism was also analyzed from the viewpoint of crystal growth. The results show that succinic acid evidently changes the crystalline growth habit of dihydrate, leading to large crystal size and transformation of crystal shape from long clavate-like to short prismatic or lamellar -shaped. Short columnar-shaped α-hemihydrate desulfurization gypsum crystals with a length-diameter ratio of 1:1 could be prepared by controlling the dosage of succinic acid. Succinic acid is selectively chemisorbed on the (111) face of gypsum crystal by complies reaction between hydroxyl and Ca2+, which inhibits the growth along c axis and alters the relative growth rate of crystal faces in different axis directions, consequently leading to the transformation of crystalline growth habit and crystal morphology of dihydrate gypsum. The addition of succinic acid decreases the growth rate of α-hemihydrate desulfogypsum crystal, so the crystals have plenty time to grow, and as a result, the dihydrate crystals are coarsened.

参考文献/References:

[1] 钟世云, 陈维灯, 贺鸿珠. 脱硫石膏应用技术现状及其发展趋势[J]. 粉煤灰, 2009(6): 35-38.
  Zhong Shiyun, Chen Weideng, He Hongzhu. The state-of-the-art of applied technology for FGD gypsum and its developing tendency[J]. Coal Ash, 2009(6): 35-38.(in Chinese)
[2] Wu Xiaoqin, Wu Zongbiao. Modification of FGD gypsum in hydrothermal mixed salt solution[J]. Journal of Environmental Science, 2006, 18(1): 170-175.
[3] Guan B, Shen Z, Wu Z, et al. Effect of pH on the preparation of alpha-calcium sulfate hemihydrate from FGD gypsum with the hydrothermal method[J]. Journal of the American Ceramic Society, 2008, 91(12): 3835-3840.
[4] Panpa W, Jinawath S. Effect of additives on the properties of alpha-hemihydrate[J]. Advances in Cement Research, 2006, 18(4): 145-152.
[5] Wang Chao, Gao Hefeng, Nie Jihong, et al. Formation mechanism and microstructure of high-strength gypsum[J]. Journal of China University of Mining & Technology, 1998, 8(1): 50-54.
[6] 张佳莉, 叶青青, 吴忠标, 等. 三聚氰胺减水剂对α-半水石膏水化硬化过程的影响[J]. 浙江大学学报: 理学版, 2009, 36(3): 318-322.
  Zhang Jiali, Ye Qingqing, Wu Zhongbiao, et al. Effects of sulfonated melamine formaldehyde on the setting of α-calcium sulfate hemihydrates[J]. Journal of Zhejiang University: Science Edition, 2009, 36(3): 318-322.(in Chinese)
[7] 白杨, 李东旭. 用脱硫石膏制备高强石膏粉的转晶剂[J]. 硅酸盐学报, 2009, 37(7): 1142-1146.
  Bai Yang, Li Dongxu. Medium crystal agent in high-strength gypsum with flue gas desulphurization gypsum[J]. Journal of the Chinese Ceramic Society, 2009, 37(7): 1142-1146.(in Chinese)
[8] Syunji S, Naomichi H, Hiroshi M. Effects of salts on the formation of α-calcium sulfate hemihydrates in aqueous salts solution under the atmospheric pressure[J]. Gypsum & Lime, 1985, 199:9-14.
[9] 岳文海, 王志.α-半水石膏晶形转化剂作用机理的探讨[J].武汉工业大学学报, 1996, 18(2):1-4.
  Yue Wenhai, Wang Zhi. Investigation on the mechanism of crystal shape modifying agent of α-hemihydrate[J]. Journal of Wuhan University of Technology, 1996, 18(2):1-4.(in Chinese)
[10] 姜洪义, 曹宇. 高强石膏的制备及性能影响因素研究[J]. 武汉理工大学学报, 2006, 28(4): 35-37.
  Jiang Hongyi, Cao Yu. Preparation of super high strength gypsum and research on factors affecting its performance[J]. Journal of Wuhan University of Technology, 2006, 28(4): 35-37.(in Chinese)

备注/Memo

备注/Memo:
作者简介: 彭家惠(1962—),男,博士,教授,博士生导师,pengjh@cqu.edu.cn.
基金项目: 国家自然科学基金资助项目(50872160).
引文格式: 彭家惠,瞿金东,张建新,等.丁二酸对α半水脱硫石膏晶体生长习性与晶体形貌的影响[J].东南大学学报:自然科学版,2011,41(6):1307-1312. [doi:10.3969/j.issn.1001-0505.2011.06.033]
更新日期/Last Update: 2011-11-20