Flashcards
3D printing techniques: SLS, inkjet, SLA and FDM
Flashcards do conjunto (24)
- 11. Lay even layer of powders using a roller 2. Laser beam is scanned across at pre-decided positions to fuse powders together 3. Stage is lowered and second layer laid 4. Process repeatedSelective Laser Sintering
- 2Selective Laser Sintering1. Lay even layer of powders using a roller
2. Laser beam is scanned across at pre-decided positions to fuse powders together
3. Stage is lowered and second layer laid
4. Process repeated - 3Which materials can be used in Selective Laser SinteringMetals, polymers, ceramics
- 41. Lay an even layer of powder using roller 2. Binder is jetted onto selective positions to fuse powder 3. Stage is lowered and 2nd layer laid 4. Process repeated3D printing
- 53D printing1. Lay an even layer of powder using roller
2. Binder is jetted onto selective positions to fuse powder
3. Stage is lowered and 2nd layer laid
4. Process repeated - 6What materials can be used in 3D printing?Metal, polymer, ceramic
- 71. Piezoelectric actuator generates a picoliter drop (via voltage - water shrink) 2. Drop ejects and reaches a substance at pre-decided positions 3. Solidification of drop (UV) 4. Repeat cycleInkjet Printing
- 8Inkjet Printing1. Piezoelectric actuator generates a picoliter drop (via voltage - water shrink)
2. Drop ejects and reaches a substance at pre-decided positions
3. Solidification of drop (UV)
4. Repeat cycle - 9What materials can be used in inkjet printing?Photopolymerisable monomers
Cell suspension - 101. UV laser scanned across a layer of photopolymerisable monomers at pre decided positions 2. Monomers polymerisable & solidify (UV) 3. Stage is moved to allow another layer of monomers 4. Process repeatedStereolithography
- 11Stereolithography1. UV laser scanned across a layer of photopolymerisable monomers at pre decided positions
2. Monomers polymerisable & solidify (UV)
3. Stage is moved to allow another layer of monomers
4. Process repeated - 12What materials can be used in stereolithography?Photopolymerisable monomers
- 131. Feed polymer into a heat & melt 2. Extrude polymer through a nozzle while stage is moved according to structure 3. Extruded polymer strands cools and solidifies to form 3D structureFused Deposition Modelling
- 14Fused Deposition Modelling1. Feed polymer into a heat & melt
2. Extrude polymer through a nozzle while stage is moved according to structure
3. Extruded polymer strands cools and solidifies to form 3D structure - 15What materials can be used in Fused Deposition Modelling?Thermoplastic polymers
(Materials that soften/mouldable upon heating but harden on cooling)
Polyetherether ketone (PEEK), polycaprolactone, polylactic acid - 16Why are processing conditions harsh for cells?High temperature
Long UV exposure time
Toxic binders - 17Which 3D printing techniques are NOT suitable for cell printing?Fused Deposition Modelling & Selective Laser Sintering = high temperature
Stereolithography = long UV exposure
3D Printing = toxic binders - 18Which printing techniques are suitable for cell printing?Inkjet printing
Laser assisted printing
Extrusion bioprinting - 191. A laser beam shines upon an energy absorbing layer at pre-decided positions 2. As a result, a shockwave is generated resulting in an ejection of a drop which reaches a substrateLaser Assisted Printing
- 20Laser Assisted Printing1. A laser beam shines upon an energy absorbing layer at pre-decided positions
2. As a result, a shockwave is generated resulting in an ejection of a drop which reaches a substrate - 21Which materials can be used for Laser Assisted Printing?Cell suspension
- 221. Mixture is loaded in a cartridge 2. Material is extruded through nozzle by pressure or mechanical forces while stage is moved 3. Extruded material strand forms a 3D structureExtrusion Bioprinting
- 23Extrusion Bioprinting1. Mixture is loaded in a cartridge
2. Material is extruded through nozzle by pressure or mechanical forces while stage is moved
3. Extruded material strand forms a 3D structure - 24Which materials can be used for Extrusion bioprinting?Hydrogels or hydrogel/cell mixtures with a suitable viscosity range
Hydrogels (shear thinning) = non fluidic colloidal networks or polymer networks that are physically/chemically crosslinked and contain large amount of water
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