Quartz sand is a kind of bulk non-metallic ore with a wide range of uses. It is the raw material for nearly 100 industrial products, mainly used in the glass industry, filler fields and the production of metallic silicon and organosilicon compounds. Because quartz sand is a hydrophilic non-metallic mineral filler, there are differences in interface properties with polymers, resulting in poor compatibility with polymers, and it is difficult to disperse uniformly in polymers. Therefore, it is necessary to use silane. The coupling agent modifies the surface of quartz sand to improve the physical and chemical properties of the surface of quartz sand, enhance its compatibility with polymers, improve its dispersibility, and improve the mechanical strength and comprehensive properties of the material. According to the different modification methods, quartz sand modification can be divided into dry modification and wet modification.

The specific steps of dry modification of silane coupling agent are:
 Take a certain amount of dried quartz sand, stir and preheat it in a ball mill for 5 minutes, add a certain amount of modifier solution (quartz sand quality percentage), then placed in a ball mill and stirred for a certain period of time, dried, cooled and ground to obtain modified quartz sand

The specific steps of wet modification of silane coupling agent are:
Weigh a certain amount of dried quartz sand (-0.074mm), add a mixture of ethanol and water (75mL of ethanol, 25mL of water), adjust the pH to 4 with oxalic acid, place it in an ultrasonic cleaner and shake for 20min, and then add a certain amount of water. Amount of silane coupling agent (percentage of quartz sand mass), continued ultrasonic cleaning for 5min, transferred to a round-bottomed flask equipped with a reflux condenser, stirred and reacted in a constant temperature heating magnetic stirrer, and the reacted slurry was filtered and cleaned under reduced pressure, The filter cake is dried and ground to obtain modified quartz sand.