CAJ | 학술논문

利用分析纯试剂合成β-2CaO·SiO2，研究表面活性剂聚乙二醇(PEG)和聚丙烯酸钠(PAAS)及二者混合物对铝酸钠溶液中β-2CaO·SiO2分解的影响，并通过Zeta电位测量、XPS等手段对吸附前后固?液界面电化学性能以及吸附机理进行研究。结果表明：PEG与PAAS对抑制二次反应具有协同作用，在PAAS与PEG体积比为1：1的混合添加模式下，总浓度为12.5 mg/L时抑制二次反应效果最好；PAAS在β-2CaO·SiO2上通过形成-COOCa配位键发生吸附，负电荷进入Stern层，导致吸附颗粒电位下降，渣中Ca 2p、Si 2p和O 1s结合能均发生较大变化；PEG发生物理吸附，吸附对界面电位不产生影响，且渣中Ca 2p、Si 2p和O 1s结合能变化不明显。
이용분석순시제합성β-2CaO·SiO2，연구표면활성제취을이순(PEG)화취병희산납(PAAS)급이자혼합물대려산납용액중β-2CaO·SiO2분해적영향，병통과Zeta전위측량、XPS등수단대흡부전후고?액계면전화학성능이급흡부궤리진행연구。결과표명：PEG여PAAS대억제이차반응구유협동작용，재PAAS여PEG체적비위1：1적혼합첨가모식하，총농도위12.5 mg/L시억제이차반응효과최호；PAAS재β-2CaO·SiO2상통과형성-COOCa배위건발생흡부，부전하진입Stern층，도치흡부과립전위하강，사중Ca 2p、Si 2p화O 1s결합능균발생교대변화；PEG발생물리흡부，흡부대계면전위불산생영향，차사중Ca 2p、Si 2p화O 1s결합능변화불명현。
β-2CaO·SiO2 was obtained with analytical grade reagents. Polyethylene glycol (PEG), sodium polyacrylate (PAAS) and their mixture were used to inhibit the decomposition of β-2CaO·SiO2 in sodium aluminate solution. The potential of solid?liquid interface and the adsorption mechanism were studied by the methods of Zeta potential measurement and XPS. The results indicate that PEG and PAAS have synergistic effect on the inhibition of secondary reaction. The inhibitory effect is the best when the volume ratio of PAAS to PEG is 1:1 and the total concentration is 12.5 mg/L. PAAS adsorbs on the surface ofβ-2CaO·SiO2 by the formation of -COOCa coordinate bond, and the negative charge enters into Stern layer, which results in the decrease of particle potential and the obvious change of binding energy of Ca 2p, Si 2p and O 1s. PEG only physically adsorbs on the surface ofβ-2CaO·SiO2, and had little effect on particle potential and binding energy of Ca 2p, Si 2p and O 1s.