【摘要】 采用六甲基二硅氮烷(HMDS)在酸性条件下对硅溶胶(SiSols)进行接枝改性。对接枝产物进行了分离提纯并研究了HMDS/SiSol(s摩尔比)、反应温度和反应时间对接枝率的影响。结果表明:在酸催化条件下HMDS可以对SiSols实现表面接枝改性;当控制HMDS与SiSols摩尔比为5颐10、反应温度为35℃、反应时间为2h时,接枝率达到最大值。更多还原

【Abstract】 Silica Sol(Si Sols)was graft-modified by using hexamethyldisilazane(HMDS)under acidc condition.The graft product was characterized by TG and FT-IR.The influences of HMDS/Si Sols(mol ratio), reaction temperature and reaction time on the graft ratio of the product were discussed in detail.Results showed that the graft ratio could be reached a maximum when controlling HMDS/Si Sols(mol ratio)of 0.5 in 35℃after 2h in an acidic catalytic condition.更多还原