scholarly journals Fused Deposition Modeling of Poly (Lactic Acid)/Walnut Shell Biocomposite Filaments—Surface Treatment and Properties

2019 ◽  
Vol 9 (22) ◽  
pp. 4892 ◽  
Author(s):  
Xiaohui Song ◽  
Wei He ◽  
Shoufeng Yang ◽  
Guoren Huang ◽  
Tonghan Yang
Keyword(s):  
Lactic Acid ◽  
Fused Deposition Modeling ◽  
Walnut Shell ◽  
Poly Lactic Acid ◽  
Porous Scaffolds ◽  
Modeling Technology ◽  
Fused Deposition ◽  
Deposition Modeling ◽  
Shell Powder ◽  
Silane Concentration

This paper presents the study of the properties of objects that were fabricated with fused deposition modeling technology while using Poly (lactic acid)/Walnut shell powder (PLA/WSP) biocomposite filaments. The WSP was treated while using NaOH followed by silane. The infrared spectrum of treated and untreated WSP was characterized. The result was that thermal and mechanical properties could be improved by adjusting the concentration of silane. The experimental results showed: the surface compatibility between WSP and PLA was dramatically improved through treatment with KH550. The crystalline, thermal gravity, and thermal degradation temperatures of biocomposite with untreated WSP were improved from 1.46%, 60.3 °C, and 239.87 °C to 2.84%, 61.3 °C, and 276.37 °C for the biocomposites with treated WSP, respectively. The tensile, flexural, and compressive strengths of biocomposites were raised each by 8.07%, 14.66%, and 23.32%. With the determined silane concentration, PLA/10–15 wt.% treated WSP biocomposites were processed and tested. The results showed that the tensile strength was improved to 56.2 MPa, which is very near to that of pure PLA. Finally, the porous scaffolds with controllable porosity and pore size were manufactured.

scholarly journals Fused Deposition Modeling of Poly (lactic acid)/Macadamia Composites—Thermal, Mechanical Properties and Scaffolds

Materials ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 258 ◽  
Author(s):  
Xiaohui Song ◽  
Wei He ◽  
Huadong Qin ◽  
Shoufeng Yang ◽  
Shifeng Wen
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Fused Deposition Modeling ◽  
Poly Lactic Acid ◽  
Porous Scaffolds ◽  
Compression Tests ◽  
X Ray Diffraction ◽  
Fused Deposition ◽  
Deposition Modeling ◽  
Structural Parts

In this work Macadamia nutshell (MS) was used as filler in fused deposition modeling (FDM) of Poly (lactic acid) (PLA) composites filaments. Composites containing MS both treated and untreated with alkali and silane were investigated by means of Fourier transform infrared spectroscopy (FTIR), X-Ray diffraction (XRD), Thermogravimetry (TG), scanning electron microscopy (SEM). The results showed that the treated MS composites had better thermal stability. Furthermore, compression tests were carried out. The PLA with 10 wt% treated MS composite was found possessing the best mechanical properties which was almost equivalent to that of the pure PLA. Finally, porous scaffolds of PLA/10 wt% treated MS were fabricated. The scaffolds exhibited various porosities in range of 30–65%, interconnected holes in size of 0.3–0.5 mm, micro pores with dimension of 0.1–1 μm and 37.92–244.46 MPa of elastic modulus. Those values indicated that the FDM of PLA/MS composites have the potential to be used as weight lighter and structural parts.

Development of three-dimensional printing filaments based on poly(lactic acid)/hydroxyapatite composites with potential for tissue engineering

2021 ◽  
pp. 002199832098856
Author(s):  
Marcela Piassi Bernardo ◽  
Bruna Cristina Rodrigues da Silva ◽  
Luiz Henrique Capparelli Mattoso
Keyword(s):  
Tissue Engineering ◽  
Lactic Acid ◽  
Fused Deposition Modeling ◽  
Three Dimensional ◽  
Poly Lactic Acid ◽  
Scanning Calorimetry ◽  
Three Dimensional Printing ◽  
Fused Deposition ◽  
Deposition Modeling ◽  
3D Printed

Injured bone tissues can be healed with scaffolds, which could be manufactured using the fused deposition modeling (FDM) strategy. Poly(lactic acid) (PLA) is one of the most biocompatible polymers suitable for FDM, while hydroxyapatite (HA) could improve the bioactivity of scaffold due to its chemical composition. Therefore, the combination of PLA/HA can create composite filaments adequate for FDM and with high osteoconductive and osteointegration potentials. In this work, we proposed a different approache to improve the potential bioactivity of 3D printed scaffolds for bone tissue engineering by increasing the HA loading (20-30%) in the PLA composite filaments. Two routes were investigated regarding the use of solvents in the filament production. To assess the suitability of the FDM-3D printing process, and the influence of the HA content on the polymer matrix, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and scanning electron microscopy (SEM) were performed. The HA phase content of the composite filaments agreed with the initial composite proportions. The wettability of the 3D printed scaffolds was also increased. It was shown a greener route for obtaining composite filaments that generate scaffolds with properties similar to those obtained by the solvent casting, with high HA content and great potential to be used as a bone graft.

scholarly journals Experimental Design of Sustainable 3D-Printed Poly(Lactic Acid)/Biobased Poly(Butylene Succinate) Blends via Fused Deposition Modeling

2019 ◽  
Vol 7 (17) ◽  
pp. 14460-14470 ◽  
Author(s):  
Mawath Qahtani ◽  
Feng Wu ◽  
Manjusri Misra ◽  
Stefano Gregori ◽  
Deborah F. Mielewski ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Experimental Design ◽  
Fused Deposition Modeling ◽  
Poly Lactic Acid ◽  
Butylene Succinate ◽  
Fused Deposition ◽  
Deposition Modeling ◽  
3D Printed

scholarly journals Multi-material poly(lactic acid) scaffold fabricated via fused deposition modeling and direct hydroxyapatite injection as spacers in laminoplasty

2018 ◽  
Author(s):  
Ghifari Syuhada ◽  
Ghiska Ramahdita ◽  
A. J. Rahyussalim ◽  
Yudan Whulanza
Keyword(s):  
Lactic Acid ◽  
Fused Deposition Modeling ◽  
Poly Lactic Acid ◽  
Fused Deposition ◽  
Deposition Modeling

Fused deposition modeling of poly (lactic acid)/almond shell composite filaments

2020 ◽  
Author(s):  
Xiaohui Song ◽  
Wei He ◽  
Peiqi Chen ◽  
Qingsong Wei ◽  
Jingxian Wen ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Fused Deposition Modeling ◽  
Poly Lactic Acid ◽  
Almond Shell ◽  
Fused Deposition ◽  
Deposition Modeling ◽  
Shell Composite

Incorporation of graphitic nano-filler and poly(lactic acid) in fused deposition modeling

2017 ◽  
Vol 134 (15) ◽  
Author(s):  
Wang Wang Yu ◽  
Jie Zhang ◽  
Jin Rong Wu ◽  
Xin Zhou Wang ◽  
Yu He Deng
Keyword(s):  
Lactic Acid ◽  
Fused Deposition Modeling ◽  
Poly Lactic Acid ◽  
Fused Deposition ◽  
Deposition Modeling

scholarly journals Effects of wood flour and MA-EPDM on the properties of fused deposition modeling 3D-printed poly lactic acid composites

BioResources ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. 7122-7138
Author(s):  
Sang-U Bae ◽  
Young-Rok Seo ◽  
Birm-June Kim ◽  
Min Lee
Keyword(s):  
Lactic Acid ◽  
3D Printing ◽  
Fused Deposition Modeling ◽  
Wood Flour ◽  
Poly Lactic Acid ◽  
Common System ◽  
Fused Deposition ◽  
Deposition Modeling ◽  
3D Printed ◽  
Material Composite

Fused deposition modeling (FDM) 3D printing technology is the most common system for polymer additive manufacturing (AM). Recent studies have been conducted to expand both the range of materials that can be used for FDM and their applications. As a filler, wood flour was incorporated into poly lactic acid (PLA) polymer to develop a biocomposite material. Composite filaments were manufactured with various wood flour contents and then successfully used for 3D printing. Morphological, mechanical, and biodegradation properties of FDM 3D-printed PLA composites were investigated. To mitigate brittleness, 5 phr of maleic anhydride grafted ethylene propylene diene monomer (MA-EPDM) was added to the composite blends, and microstructural properties of the composites were examined by scanning electron microscopy (SEM). Mechanical strength tests demonstrated that elasticity was imparted to the composites. Additionally, test results showed that the addition of wood flour to the PLA matrix promoted pore generation and further influenced the mechanical and biodegradation properties of the 3D-printed composites. An excellent effect of wood flour on the biodegradation properties of FDM 3D-printed PLA composites was observed.

scholarly journals Fabrication of 3D-Printed Biodegradable Porous Scaffolds Combining Multi-Material Fused Deposition Modeling and Supercritical CO2 Techniques

Nanomaterials ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 1080 ◽  
Author(s):  
Raúl Sanz-Horta ◽  
Carlos Elvira ◽  
Alberto Gallardo ◽  
Helmut Reinecke ◽  
Juan Rodríguez-Hernández
Keyword(s):  
Additive Manufacturing ◽  
Supercritical Co2 ◽  
Fused Deposition Modeling ◽  
Poly Lactic Acid ◽  
Porous Scaffolds ◽  
Fused Deposition ◽  
Deposition Modeling ◽  
3D Printed ◽  
Internal Pore ◽  
A Current

The fabrication of porous materials for tissue engineering applications in a straightforward manner is still a current challenge. Herein, by combining the advantages of two conventional methodologies with additive manufacturing, well-defined objects with internal and external porosity were produced. First of all, multi-material fused deposition modeling (FDM) allowed us to prepare structures combining poly (ε-caprolactone) (PCL) and poly (lactic acid) (PLA), thus enabling to finely tune the final mechanical properties of the printed part with modulus and strain at break varying from values observed for pure PCL (modulus 200 MPa, strain at break 1700%) and PLA (modulus 1.2 GPa and strain at break 5–7%). More interestingly, supercritical CO2 (SCCO2) as well as the breath figures mechanism (BFs) were additionally employed to produce internal (pore diameters 80–300 µm) and external pores (with sizes ranging between 2 and 12 μm) exclusively in those areas where PCL is present. This strategy will offer unique possibilities to fabricate intricate structures combining the advantages of additive manufacturing (AM) in terms of flexibility and versatility and those provided by the SCCO2 and BFs to finely tune the formation of porous structures.

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