大家好，最近我刚接触这一块，不了解情况，请教下大家关于这块的问题，看到一篇文献上说道：75ml的
巯丙基三甲氧基硅烷和10g的
纳米二氧化硅时，嫁接效率较高，达到16%左右。想请问，纳米二氧化硅使用分散剂分散前要在烘箱里干燥处理么？这样做的目的是什么？另外，是不是干燥完不等温度降下来就马上加加甲苯分散？我下午尝试了，从100℃烘箱里烘了16h，拿出来直接加了甲苯，观察到体系成了凝胶状，超声分散也不起作用，请问有做这一块的么？另外，附加一下，文献上的实验步骤。谢谢大家了。
2.2. Surface modification of nanosilica with MPTMS
10 g of nanosilica were kept in a vacuum chamber for 24 h at
100 C, and then dispersed in 150 mL anhydrous toluene under
mechanical stirring and ultrasonic dispersing for 30 min. The mixture
was stirred at 300 rpm for a further 1 h, and then dropped into
another prepared mixture consisting of 10 mL water, 10 mL anhydrous
ethanol, 2 mL formic acid (as pH adjuster) and different levels
(25, 50, 75, 100 and 125 mL) of MPTMS under vigorously
stirring. After continuously stirring for 4 h at 50 C, the obtained
suspension was separated by centrifugation. After drying at 90 C
under vacuum, the mixture was extracted using Soxhlet extractor
for 12 h using toluene. Finally, the modified nanosilica was dried
at 90 C under vacuum condition for 12 h.
