FRP products
Although the FRP products have the advantages of light weight, high strength and corrosion resistance, they have low hardness and poor wear resistance. The relevant experts added the fumed silica to the gel coat resin by ultrasonic dispersion method, and compared with the gel coat without the addition of fumed silica, the Mohs hardness was found to be 2.2 grade (corresponding to the hardness of gypsum). Increased to 2.8 ~ 2.9 (3 is the hardness of natural marble), wear resistance increased by 1 to 2 times, due to the grafting and bonding of nanoparticles and organic polymers, so that the toughness of the material increases, so tensile strength and resistance The impact strength is increased by more than one time, and the heat resistance is also greatly improved.

Drug carrier    
With the rapid growth of urban domestic garbage and the increasing environmental pollution, it is urgent to increase the intensity of eliminating the "four evils" and prevent the spread of diseases. It is not very effective to apply lime on the trunk and spray the syrup to the garbage can. Nowadays, large cities have used spraying central nervous anesthetic insecticides to eliminate insect pests such as mosquitoes, flies and cockroaches, but these insecticides are mostly Imported from abroad, the price is higher, and the effective period after spraying is shorter (only one month). The gas-phase white carbon black is used as a carrier to adsorb the insecticide, which has a good sustained-release effect. According to the measurement, the effective period after spraying is more than one year.