【摘要】 采用TEOS为硅源合成制备了新型的聚硅氯化铝PASC(A) ,并与传统方法合成的聚硅氯化铝PASC(B)做了比较 ,探讨了产品的 pH值和Zeta电位随B值和Si/Al摩尔比的变化关系 ,并利用酸解反应和2 7AlNMR研究了硅引入对PASC分子结构和铝形态的影响 .结果表明 ,由于采用了特殊的合成方法 ,与PASC(B)相比 ,PASC(A)具有更高的聚合度 ,分子量分布并且分子中铝硅分布均匀 ,不易被酸解聚 ,而且有利于Al13 形态稳定性 .更多还原

【Abstract】 A new type of polyaluminum silicate chloride [PASC(A)] was prepared by employing tetraethylorthosilicate (TEOS) as silicon source. By comparing PASC(A) with the conventional product [PASC(B)], the effects of B value and Si/Al molar ratio on the pH value and the Zeta potential of PASC(A) were investigated. The influence of the incorporation of silicon into PASC on the molecular structure and aluminium species was also studied by acidification method and 27 Al NMR spectroscopy. The results show that the PASC(A) has higher polymerization degree, narrow distribution of molecular weight and symmetrical distribution of aluminium and silicon in PASC molecule. It is more difficult to be acidified, and moreover, it can reduce the loss of Al 13 species. All the above advantages of PASC(A) are due to its special synthesis method.更多还原