Preparation, thermal degradation, and rheology studies for polylactic acid (PLA) and palm stearin (PS) blend: A review

Aiman, Muhammad Afiq; Ramlee, Nur Azrini; Azmi, Mohamad Azizul Mohamad; Sabri, Tuan Nur Afini Tuan

doi:10.1016/j.matpr.2022.02.420

Cited by 7 publications

(5 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In contrast, the composites displayed a non-Newtonian trend known as shear thinning behavior, , wherein viscosity decreased with increasing applied force. This suggests that the presence of SrHAP particles led the blend toward shear thinning characteristics . The robust Newtonian behavior of PLA, even at high frequencies, can be attributed to the strong hydrogen bonding between PLA chains and their entanglements, providing resistance to the applied force.…”

Section: Resultsmentioning

confidence: 98%

“…This suggests that the presence of SrHAP particles led the blend toward shear thinning characteristics. 67 The robust Newtonian behavior of PLA, even at high frequencies, can be attributed to the strong hydrogen bonding between PLA chains and their entanglements, providing resistance to the applied force. The decrease in viscosity observed in the composites at higher frequencies, facilitating melt blending, can be attributed to the disruption of networks or the insufficient time for polymer chains to align with the applied forces.…”

Section: Mechanical Testsmentioning

confidence: 99%

See 1 more Smart Citation

Strontium-Substituted Nanohydroxyapatite-Incorporated Poly(lactic acid) Composites for Orthopedic Applications: Bioactive, Machinable, and High-Strength Properties

Shaikh,

Baniasadi,

Mehrotra

et al. 2023

Biomacromolecules

View full text Add to dashboard Cite

Traditional metal-alloy bone fixation devices provide structural support for bone repair but have limitations in actively promoting bone healing and often require additional surgeries for implant removal. In this study, we focused on addressing these challenges by fabricating biodegradable composites using poly(lactic acid) (PLA) and strontium-substituted nanohydroxyapatite (SrHAP) via melt compounding and injection molding. Various percentages of SrHAP (5, 10, 20, and 30% w/w) were incorporated into the PLA matrix. We systematically investigated the structural, morphological, thermal, mechanical, rheological, and dynamic mechanical properties of the prepared composites. Notably, the tensile modulus, a critical parameter for orthopedic implants, significantly improved from 2.77 GPa in pristine PLA to 3.73 GPa in the composite containing 10% w/w SrHAP. The incorporation of SrHAP (10% w/w) into the PLA matrix led to an increased storage modulus, indicating a uniform dispersion of SrHAP within the PLA and good compatibility between the polymer and nanoparticles. Moreover, we successfully fabricated screws using PLA composites with 10% (w/w) SrHAP, demonstrating their formability at room temperature and radiopacity when observed under X-ray microtomography (micro-CT). Furthermore, the water contact angle decreased from 93 ± 2° for pristine PLA to 75 ± 3° for the composite containing SrHAP, indicating better surface wettability. To assess the biological behavior of the composites, we conducted in vitro cell-material tests, which confirmed their osteoconductive and osteoinductive properties. These findings highlight the potential of our developed PLA/SrHAP10 (10% w/w) composites as machinable implant materials for orthopedic applications. In conclusion, our study presents the fabrication and comprehensive characterization of biodegradable composites comprising PLA and strontium-substituted nanohydroxyapatite (SrHAP). These composites exhibit improved mechanical properties, formability, and radiopacity while also demonstrating desirable biological behavior. Our results suggest that these PLA/SrHAP10 composites hold promise as machinable implant materials for orthopedic applications.

show abstract

Section: Resultsmentioning

confidence: 98%

Section: Mechanical Testsmentioning

confidence: 99%

Strontium-Substituted Nanohydroxyapatite-Incorporated Poly(lactic acid) Composites for Orthopedic Applications: Bioactive, Machinable, and High-Strength Properties

Shaikh,

Baniasadi,

Mehrotra

et al. 2023

Biomacromolecules

View full text Add to dashboard Cite

show abstract

“…05 g/cc [ 51 ] 6 Benzyl butyl phthalate 1. 119 g/cc [ 52 ] 7 Emoltene 0. 960 g/cc [ 50 ] 8 Bis (2-ethylhexyl) phthalate 0.…”

Section: Resultsmentioning

confidence: 99%

“…960 g/cc [ 50 ] 8 Bis (2-ethylhexyl) phthalate 0. 99 g/cc [ 52 ] 9 Diisononyl phthalate 0. 98 g/cc [ 52 ] 10 Diisononyl phthalate 0.970-0.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Exfoliation and physico-chemical characterization of novel bioplasticizers from Nelumbo nucifera leaf for biofilm application

Divakaran,

Sriariyanun,

Suyambulingam

et al. 2023

Heliyon

View full text Add to dashboard Cite

Toughening of poly(lactic acid) (PLA) with poly(butylene adipate-co-terephthalate) (PBAT): a morphological, thermal, mechanical, and degradation evaluation in a simulated marine environment

et al. 2023

View full text Add to dashboard Cite

Preparation, thermal degradation, and rheology studies for polylactic acid (PLA) and palm stearin (PS) blend: A review

Cited by 7 publications

References 64 publications

Strontium-Substituted Nanohydroxyapatite-Incorporated Poly(lactic acid) Composites for Orthopedic Applications: Bioactive, Machinable, and High-Strength Properties

Strontium-Substituted Nanohydroxyapatite-Incorporated Poly(lactic acid) Composites for Orthopedic Applications: Bioactive, Machinable, and High-Strength Properties

Exfoliation and physico-chemical characterization of novel bioplasticizers from Nelumbo nucifera leaf for biofilm application

Toughening of poly(lactic acid) (PLA) with poly(butylene adipate-co-terephthalate) (PBAT): a morphological, thermal, mechanical, and degradation evaluation in a simulated marine environment

Contact Info

Product

Resources

About