Photosensitive resin used for 3D printing materials, and preparation method thereof
A photosensitive resin and 3D printing technology, applied in the field of 3D printing materials, can solve the problems of low hardness, poor heat resistance, and poor mechanical properties of formed parts, and achieve high mechanical strength, small shrinkage, and high reactivity.
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example 1
[0025] Take 20g of white corundum sand and 0.01g of dispersant S-2108, add it to 30mL of silica sol, stir at 300r / min for 20min at 50°C to obtain a mixed solution, take 30g of (3-aminopropyl)triethoxysilane , 12g acetic acid was added to 450mL absolute ethanol, ultrasonically treated with 100W ultrasonic wave for 15min, then the mixture was added dropwise at 1mL / min, and the ultrasonic treatment was continued for 30min, and then the reaction was stirred at 300r / min at 60°C for 124h. After the reaction was over Put it into a centrifuge for centrifugation for 8 minutes to obtain a precipitate A, wash the precipitate A with a mass fraction of 50% acetone-ethanol solution for 2 times, and then place it in a drying oven to dry for 3 hours to obtain aminopropyl modified composite particles, and add 12 g of triethylamine to it In 300mL of tetrahydrofuran, ultrasonically treated with 100W ultrasonic wave for 15min, add 15g of aminopropyl modified composite particles, stir at 300r / min f...
example 2
[0027]Take 25g of white corundum sand and 0.05g of dispersant S-2108, add it to 35mL of silica sol, stir at 350r / min for 25min at 55°C to obtain a mixed solution, take 37g of (3-aminopropyl)triethoxysilane , 15g acetic acid was added to 520mL absolute ethanol, ultrasonically treated with 100W ultrasonic wave for 17min, then the mixture was added dropwise at 1mL / min, and the ultrasonic treatment was continued for 35min, and then the reaction was stirred at 350r / min at 70°C for 18h. After the reaction was over Put it into a centrifuge for centrifugation for 10 minutes to obtain a precipitate A, wash the precipitate A with a mass fraction of 50% acetone-ethanol solution for 3 times, and then place it in a drying oven to dry for 4 hours to obtain aminopropyl modified composite particles, and add 15 g of triethylamine to it In 375mL of tetrahydrofuran, ultrasonically treated with 100W ultrasonic wave for 17min, add 17g of aminopropyl modified composite particles, stir at 350r / min fo...
example 3
[0029] Take 30g of white corundum sand and 0.1g of dispersant S-2108, add it to 40mL of silica sol, and stir at 400r / min for 30min at 60°C to obtain a mixed solution, take 45g of (3-aminopropyl)triethoxysilane , 18g of acetic acid, added to 600mL of absolute ethanol, ultrasonically treated with 100W ultrasonic for 20min, and then added dropwise to the mixture at 2mL / min, and continued to be ultrasonicated for 40min, and then stirred at 80°C at 400r / min for 24h. After the reaction Put it into a centrifuge for centrifugation for 12 minutes to obtain a precipitate A, wash the precipitate A with a mass fraction of 50% acetone-ethanol solution for 3 times, and then place it in a drying oven to dry for 5 hours to obtain aminopropyl modified composite particles, and add 18 g of triethylamine to it In 450mL of tetrahydrofuran, ultrasonically treated with 100W ultrasonic wave for 20min, add 20g of aminopropyl modified composite particles, stir at 400r / min for 30min, then add 20g of 2-br...
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