Modified polyvinyl alcohol used as supporting material, preparation method and removal method
A polyvinyl alcohol and support material technology, applied in 3D object support structures, additive manufacturing, manufacturing tools, etc., can solve problems such as easy moisture absorption deformation, affecting the printing accuracy of solid structures, and damage to solid structures.
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Embodiment 1
[0034] Sodium chloride is first dissolved in deionized water to form a saturated sodium chloride solution, and then sprayed and deposited on the surface of porous silica microspheres to obtain silica microspheres that adsorb sodium chloride; sodium chloride, porous silica The mass ratio of the microspheres is 2:1; then the silica microspheres adsorbing sodium chloride, polyvinyl alcohol PVA1799, and compound plasticizer (composed of magnesium chloride, caprolactam, and ethylene glycol in a mass ratio of 1:2:4 composition) into a high-speed mixer, raise the temperature to 120°C, and mix at a speed of 120r / min for 10 minutes to obtain a blend; The mass ratio is 30:100:30; and then the blend is extruded into a filamentous wire by twin-screw extruder (the heating temperature of each section is 180°C, 190°C, 200°C, 210°C, 200°C). A modified polyvinyl alcohol material is obtained.
[0035] The obtained modified polyvinyl alcohol material was printed by a 3D printer into a test bloc...
Embodiment 2
[0037] Sodium chloride is first dissolved in deionized water to form a saturated sodium chloride solution, and then sprayed and deposited on the surface of porous silica microspheres to obtain silica microspheres that adsorb sodium chloride; sodium chloride, porous silica The mass ratio of the microspheres is 3:1; then the silica microspheres adsorbing sodium chloride, polyvinyl alcohol PVA1799, and compound plasticizer (made of magnesium chloride, caprolactam, and ethylene glycol in a mass ratio of 1:1:5 composition) into a high-speed mixer, raise the temperature to 110°C, and mix at a speed of 90r / min for 20 minutes to obtain a blend; The mass ratio is 30:100:31; then the blend is extruded into a filamentous wire by using a twin-screw extruder (the heating temperature of each section is 180°C, 190°C, 200°C, 210°C, 200°C). A modified polyvinyl alcohol material is obtained.
[0038] The obtained modified polyvinyl alcohol material was printed by a 3D printer into a test block...
Embodiment 3
[0040] Sodium chloride is first dissolved in deionized water to form a saturated sodium chloride solution, and then sprayed and deposited on the surface of porous silica microspheres to obtain silica microspheres that adsorb sodium chloride; sodium chloride, porous silica The mass ratio of the microspheres is 2:1; then the silica microspheres adsorbing sodium chloride, polyvinyl alcohol PVA1799, and compound plasticizer (composed of magnesium chloride, caprolactam, and ethylene glycol in a mass ratio of 1:2:4 composition) into a high-speed mixer, raise the temperature to 110°C, and mix at a speed of 90r / min for 20 minutes to obtain a blend; The mass ratio is 35:100:32; then the blend is extruded into a filamentous wire by using a twin-screw extruder (the heating temperature of each section is 180°C, 190°C, 200°C, 210°C, 200°C). A modified polyvinyl alcohol material is obtained.
[0041] The obtained modified polyvinyl alcohol material was printed by a 3D printer into a test b...
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