Limits...
3D Printable Graphene Composite.

Wei X, Li D, Jiang W, Gu Z, Wang X, Zhang Z, Sun Z - Sci Rep (2015)

Bottom Line: Graphene is the most recent superior material which could potentially initialize another new material Age.Three-dimensional (3D) printing fills the missing linkage between graphene materials and the digital mainstream.Here we demonstrate for the first time, a graphene composite, with a graphene loading up to 5.6 wt%, can be 3D printable into computer-designed models.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, Fudan University, Shanghai 200433, P. R. China.

ABSTRACT
In human being's history, both the Iron Age and Silicon Age thrived after a matured massive processing technology was developed. Graphene is the most recent superior material which could potentially initialize another new material Age. However, while being exploited to its full extent, conventional processing methods fail to provide a link to today's personalization tide. New technology should be ushered in. Three-dimensional (3D) printing fills the missing linkage between graphene materials and the digital mainstream. Their alliance could generate additional stream to push the graphene revolution into a new phase. Here we demonstrate for the first time, a graphene composite, with a graphene loading up to 5.6 wt%, can be 3D printable into computer-designed models. The composite's linear thermal coefficient is below 75 ppm·°C(-1) from room temperature to its glass transition temperature (Tg), which is crucial to build minute thermal stress during the printing process.

No MeSH data available.


Related in: MedlinePlus

Thermal and mechanical analysis of ABS and G-ABS composites.a, Representative DSC curves of ABS and G-ABS composites. The Tg value slightly increased as the graphene loading in composites increased, calculated from the DSC curves. b, Loss factor (tan δ) derived from DMA. In all prepared samples, pure ABS claims the highest tan δ. by adding graphene sheets into ABS, ABS’s chain mobility was constrained with graphene’s stiff frameworks, which induces smaller tan δ values. c,d, TGA and TMA curves of ABS and G-ABS composites as a function of temperature. CTE values were calculated from the linear region (RT to 110 °C) in TMA.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4495599&req=5

f3: Thermal and mechanical analysis of ABS and G-ABS composites.a, Representative DSC curves of ABS and G-ABS composites. The Tg value slightly increased as the graphene loading in composites increased, calculated from the DSC curves. b, Loss factor (tan δ) derived from DMA. In all prepared samples, pure ABS claims the highest tan δ. by adding graphene sheets into ABS, ABS’s chain mobility was constrained with graphene’s stiff frameworks, which induces smaller tan δ values. c,d, TGA and TMA curves of ABS and G-ABS composites as a function of temperature. CTE values were calculated from the linear region (RT to 110 °C) in TMA.

Mentions: Temperatures of nozzle, HBC and HBP are crucial parameters to smoothly print the composite filament without major structural flaws. To calibrate our 3D printing system for optimal performance, ABS and G-ABS samples’ thermal and mechanical properties were carefully assessed with standard techniques, such as differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), thermogravimetric analysis (TGA) and thermomechanical analysis (TMA). In FDM printing, printing materials need to be heated above Tg and then cool down from it to room temperature (RT). Therefore, before any 3D printing, Tg is the first and most vital parameter to be determined37. Fig. 3a is the representative DSC curves, from which Tg values can be calculated and listed in Table S332. Pure ABS has a Tg value close to ~105.8 °C. This value slightly shifted to ~110 °C with incremental graphene loadings (Table S3). The reinforcing graphene network might lead to enhancement of Tg38. Graphene additives restrict the segmental mobility of ABS’s chain segments near graphene sheets, which increases the melting temperature of the amorphous materials3239. Same trend was observed in DMA-derived Tg values, with a slight elevation as the graphene loading increases (Table S3).


3D Printable Graphene Composite.

Wei X, Li D, Jiang W, Gu Z, Wang X, Zhang Z, Sun Z - Sci Rep (2015)

Thermal and mechanical analysis of ABS and G-ABS composites.a, Representative DSC curves of ABS and G-ABS composites. The Tg value slightly increased as the graphene loading in composites increased, calculated from the DSC curves. b, Loss factor (tan δ) derived from DMA. In all prepared samples, pure ABS claims the highest tan δ. by adding graphene sheets into ABS, ABS’s chain mobility was constrained with graphene’s stiff frameworks, which induces smaller tan δ values. c,d, TGA and TMA curves of ABS and G-ABS composites as a function of temperature. CTE values were calculated from the linear region (RT to 110 °C) in TMA.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4495599&req=5

f3: Thermal and mechanical analysis of ABS and G-ABS composites.a, Representative DSC curves of ABS and G-ABS composites. The Tg value slightly increased as the graphene loading in composites increased, calculated from the DSC curves. b, Loss factor (tan δ) derived from DMA. In all prepared samples, pure ABS claims the highest tan δ. by adding graphene sheets into ABS, ABS’s chain mobility was constrained with graphene’s stiff frameworks, which induces smaller tan δ values. c,d, TGA and TMA curves of ABS and G-ABS composites as a function of temperature. CTE values were calculated from the linear region (RT to 110 °C) in TMA.
Mentions: Temperatures of nozzle, HBC and HBP are crucial parameters to smoothly print the composite filament without major structural flaws. To calibrate our 3D printing system for optimal performance, ABS and G-ABS samples’ thermal and mechanical properties were carefully assessed with standard techniques, such as differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), thermogravimetric analysis (TGA) and thermomechanical analysis (TMA). In FDM printing, printing materials need to be heated above Tg and then cool down from it to room temperature (RT). Therefore, before any 3D printing, Tg is the first and most vital parameter to be determined37. Fig. 3a is the representative DSC curves, from which Tg values can be calculated and listed in Table S332. Pure ABS has a Tg value close to ~105.8 °C. This value slightly shifted to ~110 °C with incremental graphene loadings (Table S3). The reinforcing graphene network might lead to enhancement of Tg38. Graphene additives restrict the segmental mobility of ABS’s chain segments near graphene sheets, which increases the melting temperature of the amorphous materials3239. Same trend was observed in DMA-derived Tg values, with a slight elevation as the graphene loading increases (Table S3).

Bottom Line: Graphene is the most recent superior material which could potentially initialize another new material Age.Three-dimensional (3D) printing fills the missing linkage between graphene materials and the digital mainstream.Here we demonstrate for the first time, a graphene composite, with a graphene loading up to 5.6 wt%, can be 3D printable into computer-designed models.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, Fudan University, Shanghai 200433, P. R. China.

ABSTRACT
In human being's history, both the Iron Age and Silicon Age thrived after a matured massive processing technology was developed. Graphene is the most recent superior material which could potentially initialize another new material Age. However, while being exploited to its full extent, conventional processing methods fail to provide a link to today's personalization tide. New technology should be ushered in. Three-dimensional (3D) printing fills the missing linkage between graphene materials and the digital mainstream. Their alliance could generate additional stream to push the graphene revolution into a new phase. Here we demonstrate for the first time, a graphene composite, with a graphene loading up to 5.6 wt%, can be 3D printable into computer-designed models. The composite's linear thermal coefficient is below 75 ppm·°C(-1) from room temperature to its glass transition temperature (Tg), which is crucial to build minute thermal stress during the printing process.

No MeSH data available.


Related in: MedlinePlus