Biocompatible fibers from thermoplastic polyurethane reinforced with polylactic acid microfibers

Jašo, Vladislav; Rodić, Marko V.; Petrovìć, Zoran S.

doi:10.1016/j.eurpolymj.2014.11.041

Cited by 39 publications

(25 citation statements)

References 19 publications

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“…PLA is compatible with the soft polyester segments of TPU and can form hydrogen bonds with the carbamates from hard segments of TPU. 7,8 3DP's most distinguishing feature is its ability to construct complex spatial objects rapidly from a digital model file. The design and production of personalized products in the pharmaceutical field, such as medicines, oral dosage forms, and medical devices, has benefitted from the advantages of 3DP.…”

Section: Introductionmentioning

confidence: 99%

Application of a thermoplastic polyurethane/polylactic acid composite filament for 3D-printed personalized orthosis

Tao¹,

Shao²,

Li³

et al. 2019

Mater. Tehnol.

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For designing and fabricating personalized, cost-effective and biodegradable orthoses, a finger orthosis was chosen as an example to explore a suitable material, personalized design method, and fabrication with a fuse-deposition-modeling (FDM) open-source 3D printer. Thermoplastic polyurethane (TPU)/polylactic acid (PLA) composite filaments were explored for 3D printing. The polymer composite compositions were TPU/PLA: 0 %/100 % (TP0), 25 %/75 % (TP25), and 50 %/50 % (TP50) by weight, respectively. The mechanical performance, thermal properties, and structure of the TPU/PLA composite filaments were assessed by tensile tests, thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC), and powder X-ray diffraction (XRD) measurements. Compared to the neat PLA, the TP25 specimens exhibited almost the same tensile strength, but its higher elongation at the break indicates that TP25 is more suitable for the material of orthoses. However, a further increase of the TPU ratio to 50 % resulted in a sharp decrease of the tensile strength. The addition of TPU had little effect on the starting thermal decomposition temperature, glass-transition temperature, and melting temperature of the composites. The composite filaments can be printed through the normal 3D printing procedure. 3D scanning and open-source 3D printers can be used to complete the design and fabrication of personalized orthoses.

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Section: Introductionmentioning

confidence: 99%

Application of a thermoplastic polyurethane/polylactic acid composite filament for 3D-printed personalized orthosis

Tao¹,

Shao²,

Li³

et al. 2019

Mater. Tehnol.

View full text Add to dashboard Cite

show abstract

“…The thermoplastic polyurethane (TPU) is a subcategory of thermoplastic elastomers consisting of hard block and soft block, which imparts outstanding physical properties including good extensibility, high strength, and reasonably good biocompatibily . TPU has been extensively used in biomedical field such as catheters, blood pumps, artificial heart components, and wound dressing .…”

Section: Introductionmentioning

confidence: 99%

Improved toughness of poly(ether‐block‐amide) via melting blending with thermoplastic polyurethane for biomedical applications

Xue

Tang

Qin

et al. 2019

J of Applied Polymer Sci

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Biocompatible polyether-block-amide (PEBA) copolymers have been widely applied in invasive medical devices. Due to the high hard segment ratios and poor toughness, PEBAs generally suffer from low fracture extensibility, large brittleness, and low compliance. Modification of PEBA with thermoplastic polyurethane (TPU) elastomer via melting blending is thus needed to improve the toughness. Mechanical experiments exhibited that when the content of TPU was 3% (w/w), the elongation at break and the notched impact strength of PEBA/TPU composite were improved by 12.4 and 30.5%, respectively. Field emission scanning electron microscopy results illustrated that there existed two toughening mechanisms in PEBA/TPU composites, including the crazing with a shear-yield mechanism and the single-layer crack extension mechanism. Moreover, Fourier transform infrared spectroscopy revealed that the intermolecular interaction between PEBA and TPU was enhanced due to hydrogen bonding, leading to the tensile mechanical properties and toughness increased.

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“…For instance, V. Jašo et al . had prepared thermal elastomeric polyurethane (TPU) fibers modified with isotactic polypropylene (iPP) and polylactic acid (PLA) microfibers by extrusion spinning . They reported that the iPP and PLA microfibers led to remarkable enhancement of the mechanical properties of TPU fibers.…”

Section: Introductionmentioning

confidence: 99%

In situ fibrillation of isotactic polypropylene in ethylene‐vinyl acetate: Toward enhanced rheological and mechanical properties

Luo

Sun

Huang

et al. 2019

J of Applied Polymer Sci

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In situ microfibrillar reinforced composites with ethylene-vinyl acetate (EVA) as matrix and isotactic polypropylene (iPP) as dispersed fibrils were successfully fabricated by multistage stretching extrusion with an assembly of laminating-multiplying elements (LMEs). Four types of EVA with different apparent viscosity were utilized to study the influence of viscosity ratio on the morphology and mechanical properties of EVA/iPP in situ microfibrillar blends. The scanning electron micrographs revealed that the dividing-multiplying processes in LMEs could effectively transform the morphology of iPP phase into microfibrils and the morphology of iPP microfibrils strongly depended on the viscosity ratio. Higher viscosity ratio was favorable for formation of finer microfibrils with narrower diameter distribution. The morphology development of iPP with different viscosity ratio greatly affected the rheological and mechanical properties of EVA/iPP blends. The dynamic rheological results shown that the iPP microfibrils were helpful to increase the storage modulus and loss modulus. The tensile test indicated that the mechanical properties of EVA/iPP blends were controlled by the morphology of iPP phase and the polarity of EVA matrix.

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Biocompatible fibers from thermoplastic polyurethane reinforced with polylactic acid microfibers

Cited by 39 publications

References 19 publications

Application of a thermoplastic polyurethane/polylactic acid composite filament for 3D-printed personalized orthosis

Application of a thermoplastic polyurethane/polylactic acid composite filament for 3D-printed personalized orthosis

Improved toughness of poly(ether‐block‐amide) via melting blending with thermoplastic polyurethane for biomedical applications

In situ fibrillation of isotactic polypropylene in ethylene‐vinyl acetate: Toward enhanced rheological and mechanical properties

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