3D printing of spent coffee ground derived biochar reinforced epoxy composites

Alhelal, Ahmed; Mohammed, Zaheeruddin; Jeelani, Shaik; Rangari, Vijaya K.

doi:10.1177/00219983211002237

Cited by 28 publications

(14 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Biochar derived from SCG (1 and 3 wt.%) was also used to obtain thermoset-based composites for 3D printing [ 155 ]. Their particles presented a nanostructured morphology.…”

Section: Scg Polymer Compositesmentioning

confidence: 99%

Valorization of Spent Coffee Grounds as Precursors for Biopolymers and Composite Production

et al. 2022

View full text Add to dashboard Cite

Spent coffee grounds (SCG) are a current subject in many works since coffee is the second most consumed beverage worldwide; however, coffee generates a high amount of waste (SCG) and can cause environmental problems if not discarded properly. Therefore, several studies on SCG valorization have been published, highlighting its waste as a valuable resource for different applications, such as biofuel, energy, biopolymer precursors, and composite production. This review provides an overview of the works using SCG as biopolymer precursors and for polymer composite production. SCG are rich in carbohydrates, lipids, proteins, and minerals. In particular, carbohydrates (polysaccharides) can be extracted and fermented to synthesize lactic acid, succinic acid, or polyhydroxyalkanoate (PHA). On the other hand, it is possible to extract the coffee oil and to synthesize PHA from lipids. Moreover, SCG have been successfully used as a filler for composite production using different polymer matrices. The results show the reasonable mechanical, thermal, and rheological properties of SCG to support their applications, from food packaging to the automotive industry.

show abstract

“…Biochar derived from SCG (1 and 3 wt.%) was also used to obtain thermoset-based composites for 3D printing [ 155 ]. Their particles presented a nanostructured morphology.…”

Section: Scg Polymer Compositesmentioning

confidence: 99%

Valorization of Spent Coffee Grounds as Precursors for Biopolymers and Composite Production

et al. 2022

View full text Add to dashboard Cite

show abstract

“…It was revealed that biochar with the highest porous morphology was the most effective in its reinforcing ability, thus improving the overall thermal and mechanical properties of the system . High-pressure/temperature pyrolysis reactions can be utilized to synthesize carbon with better inherent properties, thus allowing for lower loading wt % . Idrees et al reinforced recycled poly(ethylene terephthalate) with packaging waste-derived biochar at loading as low as 0–5 wt % .…”

Section: Introductionmentioning

confidence: 99%

“… 19 High-pressure/temperature pyrolysis reactions can be utilized to synthesize carbon with better inherent properties, thus allowing for lower loading wt %. 20 Idrees et al reinforced recycled poly(ethylene terephthalate) with packaging waste-derived biochar at loading as low as 0–5 wt %. 21 The biochar can be further reduced in its size to make effective use of surface through postprocessing methods like activation, 22 , 23 ultrasonication, 24 , 25 and ball milling.…”

Section: Introductionmentioning

confidence: 99%

Effect of Low-Temperature Plasma Treatment on Starch-Based Biochar and Its Reinforcement for Three-Dimensional Printed Polypropylene Biocomposites

2022

Self Cite

View full text Add to dashboard Cite

Uniform dispersion and high interfacial adhesion are two of the most difficult components of creating an ideally reinforced polymer composite. One of the solutions could be surface engineering of reinforcing filler materials utilizing innovative technologies. Low-temperature plasma treatments in the presence of sulfur hexafluoride (SF6) gas are proposed as a sustainable alternative to modify the surface properties of biochar carbon synthesized from sustainable starch-based packaging waste via a high-temperature/pressure pyrolysis reaction in the current study. X-ray photoelectron spectroscopy tests revealed that plasma treatments were effective in the fluorination of biochar carbon like wet chemical methods. By delivering fluorine-related functionalities only on the surface of the carbon, plasma treatments were efficient in changing the surface properties of biochar carbon while keeping the carbon’s beneficial bulk properties intact, which is unique to this method. The modified biochar was effectively utilized to reinforce polypropylene. Mechanical properties like tensile strength improved by 91% when compared to neat polymers and 31% when compared to untreated biochar-reinforced polymers at 0.75 wt % loadings. Elongation at break increased from 12.7 to 38.78, showing an impressive 216% increase due to effective reinforcement by plasma functionalization. The decomposition onset temperature and maximum rate of decomposition temperature increased by 60 and 49 °C, respectively, when compared to neat polymers. Plasma-modified biochar-reinforced three-dimensional printed samples have shown promise to be utilized for the development of composite parts using additive manufacturing methods.

show abstract

“…Studies conducted on mixtures with finer grain sizes, classified by the authors as nanocomposites, indicate a beneficial effect of the use of biochar as an effective reinforcement [ 42 , 43 ].…”

Section: Introductionmentioning

confidence: 99%

Feasibility of Using Biochar as an Eco-Friendly Microfiller in Polymer Concretes

et al. 2022

View full text Add to dashboard Cite

The circular economy includes, among other things, the use of waste materials. One such material is biochar, which should not be used as a fuel because its combustion generates large amounts of air pollution. This study evaluates the feasibility of using biochar as a partial filler in a polymer concrete. The components of the polymer concretes used in this study were vinyl-ester resin, traditional microfiller—quartz powder, waste microfiller—biochar and quartz aggregate with grain sizes up to 2 mm. The quartz aggregate was dosed at a constant rate of 1458 kg/m3 of concrete, whereas the dosage of resin and microfiller was formulated according to the experimental plan for mixtures and executed based on the volume of the remaining space: resin (65–85%), quartz powder (5–35%) and biochar (0–10%). The effects on the setting process, the consistency of the fresh composite mix and the flexural and compressive strengths were investigated. The study revealed significant deterioration of technological parameters (over 15% of biochar content makes a mixture unworkable) and slight deterioration of mechanical ones (flexural strength did not change significantly, and the compressive strength decreased by up to 15%). These results indicate that, despite some limitations, the use of biochar as an alternative pro-ecological filler is possible.

show abstract

3D printing of spent coffee ground derived biochar reinforced epoxy composites

Cited by 28 publications

References 42 publications

Valorization of Spent Coffee Grounds as Precursors for Biopolymers and Composite Production

Valorization of Spent Coffee Grounds as Precursors for Biopolymers and Composite Production

Effect of Low-Temperature Plasma Treatment on Starch-Based Biochar and Its Reinforcement for Three-Dimensional Printed Polypropylene Biocomposites

Feasibility of Using Biochar as an Eco-Friendly Microfiller in Polymer Concretes

Contact Info

Product

Resources

About