SiO2 can reduce volume shrinkage/thermal expansion coefficient and improve mechanical properties of cured resins, as itdoes not react with resins. However, the optimum amount of SiO2 in resin is still a problem for the preparation of resins for 3D printing. This study compared SiO2dispersion and other properties (gel content, storage modulus and loss modulus) of samples containing 0%, 0.1%, 0.5%, 1%, 1.5% and 2% SiO2, respectively, and the optimal content of SiO2 was determined. SEM results show that SiO2 dispersion becomes worse when SiO2 content increases. The sample gel content gradually decreases with the increase of SiO2. Moreover, the mechanical properties increase first and then decrease, which shows the best performance when SiO2 content is 1%. Finally, 3D printing was studied using the 1% SiO2 sample, and the result shows that components with over 10 mm height can be produced.
three-dimensional printingresin formulationsilicon dioxideperformance test