摘要
利用十二烷基苯磺酸钠(SDBS)为模板剂,研究了SDBS的浓度,Ca^2+和SiO3^2-离子的浓度,是否搅拌和反应时间等条件对水合硅酸钙(CSH)形貌特征和分散性能的影响,并提出了不同CSH球壳形貌特征的形成机理.结果显示,溶液中Na2SiO3·9H2O浓度增大, SDBS浓度增大及反应时间延长均会使CSH的结晶度变好,聚合度增大, Q2结构的相对含量增加,其中Na2SiO3·9H2O和SDBS浓度是主要控制因素. SDBS在溶液中形成的球形胶束具有极强的模板作用,能有效改变CSH的结晶生长方式;通过调节SDBS浓度和钙硅比例,并适当延长CSH的生长时间,能够获得球壳完整,分散性好且稳定性强的CSH.
The effects of the concentrations of SDBS, Ca2+ and SiO3^2- ions, stirring and reaction time on the dispersibility and morphology of calcium silicate hydrate(CSH) using sodium dodecylbenzene sulfonate(SDBS) as template were investigated, the formation mechanism of different CSH spherical shell morphology features was prpposed. The results showed that the crystallinity and polymerization degree of CSH increased and the relative content of Q2 structure increased with the increase of Na2SiO3 9 H2O concentration, SDBS concentration and reaction time, the concentration of Na2SiO3 9 H2O and SDBS were the main controlling factors. The spherical micelles formed by SDBS in solution have a strong template action, which effectively changes the crystal growth mode of CSH. By adjusting the concentration of SDBS and the ratio of calcium to silicon and appropriately prolonging the growth time of CSH, the CSH product with complete spherical shell, good disper-sibility and high stability can be obtained.
作者
王月
郭晓红
周广栋
程铁欣
WANG Yue;GUO Xiaohong;ZHOU Guangdong;CHENG Tiexin(College of Chemistry,Jilin University,Changchun 130021,China)
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2019年第9期1795-1804,共10页
Chemical Journal of Chinese Universities
基金
中国石油大庆油田有限责任公司科研项目(批准号:DQYT-1204003-2015-JS-824)资助~~
关键词
水合硅酸钙
球壳
形貌
分散性
十二烷基苯磺酸钠
Calcium silicate hydrate
Spherical shell
Morphology
Dispersibility
Sodium dodecylbenzene sulfonate(SDBS)
