C3S浆体的ζ电位研究  

ζ Potential Study of C_3S Pastes

作　　者：钱海龙[1] 邓敏[1] 陆国森[1] 王志磊[1] QIAN Hai-long DENG Min LU Guo-sen WANG Zhi-lei(Jiangsu National Synergetic Innovation Center for Advanced Materials （SICAM）, State Key Laboratory of Materials-Oriented Chemical Engineering, College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, P. R. China)

机构地区：[1]国家“江苏先进生物与化学制造协同创新中心”,材料化学工程国家重点实验室,南京工业大学材料科学与工程学院,南京210009

出　　处：《科学技术与工程》2016年第36期223-227,共5页Science Technology and Engineering

摘　　要：采用分析纯试剂合成的C_3S和纳米SiO_2水化制备浆体,应用X-射线衍射仪(XRD)、场发射电镜(FESEM)和红外光谱分析(FTIR)分别表征了C_3S浆体的物相组成、微观形貌和分子结构。研究了浆体分散在不同浓度电解质溶液中的ζ电位。结果表明:C_3S浆体在去离子水中ζ电位均为负值,未掺纳米SiO_2浆体ζ电位约为-17 mV,掺15%纳米SiO_2浆体ζ电位约为-19 mV。在Ca^(2+)、Li^+和Cl^-溶液中,浆体表面吸附离子,改变了自身所带电荷,进而引起浆体ζ电位变化,K^+由扩散层进入吸附层改变ζ电位。C3 S synthesized with analytically pure compounds and nano-SiO2 were used to prepare pastes. The phase composition, microstructure and molecular structure of the pastes were characterized by means of X-ray diffraction, field emission scanning electron microscope and fourier transform infrared spectroscopy, respectively. The potential of pastes dispersing in electrolytes solutions of different concentrations were investigated. The results show that C3S pastes show negative ζ potential in de-ionized water. ζ potential of pastes incorporated with 0% nano- SiO2 is about - 17 mV, and ζpotential of pastes incorporated with 15% nano-SiO2 is about - 19 mV. In Ca2＋ , Li ＋ and Cl- solutions, pastes adsorb ions and the charges of pastes are changed, so ζ potential of pastes is changed. K makes ζ potential of pastes decrease by entering adsorption layer.

关 键 词：C3S浆体 Ζ电位 离子 

分 类 号：TQ170.1[化学工程—硅酸盐工业]