Synthesis, characterization, crystallinity, mechanical properties, and shape memory behavior of polyurethane/hydroxyapatite nanocomposites

Marand, Maryam Jalili; Rezaei, Mehran; Babaie, Amin; Lotfi, Reza

doi:10.1177/1045389x20932212

Cited by 15 publications

(7 citation statements)

References 50 publications

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“…The crystallinity degree (DC) of polyurethane composites shown in Table 3 confirmed that the inclusion of AL-N and AL-Z in polyurethane matrices reduced the crystalline regions due to the disruption of interactions inside soft segments. Marand et al [ 72 ] obtained analogous results with the inclusion of hydroxyapatite nanoparticles in polyurethane matrices with PCL-diol.…”

Section: Resultsmentioning

confidence: 65%

Influence of Starch on the Structure–Properties Relationship in Polyethylene Glycol/Polycaprolactone Diol Polyurethanes

2022

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Improvements in the antithrombogenicity activity of biomaterials for cardiovascular applications are necessary to meet the demand for vascular grafts in the world. Zwitterionic compounds tend to be used due to their anti-fouling properties, which reduce platelet adhesions and protein absorptions. Therefore, in this research, potato starch (AL-N) and zwitterionic starch (AL-Z) (obtained by Williamson etherification) were included as fillers in polyurethane (PU) matrices from polycaprolactone diol (PCL), polyethylene glycol (PEG), pentaerythritol (PE) and isophorone diisocyanate (IPDI) in order to study their effect in terms of their physicochemical, mechanical and thermal properties. We conducted our evaluation using attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), contact angle analysis, swelling behavior, thermogravimetric analysis (TGA), tensile/strain analysis, scanning electron microscopy equipped with energy dispersive X-ray spectroscopy (SEM-EDS), dynamic mechanic analysis (DMA), differential scanning calorimetry (DSC), and X-ray diffraction (XRD). The results showed that AL-N and AL-Z modified these properties, where AL-N improved tensile strength, and AL-Z increased the hydrophilicity of polyurethanes matrices; additionally, AL-N had interactions with the soft segments, and AL-Z had interactions with the hard segments. Finally, both fillers reduced the degree of crystallinity and did not affect the thermal stability of polyurethanes.

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Section: Resultsmentioning

confidence: 65%

Influence of Starch on the Structure–Properties Relationship in Polyethylene Glycol/Polycaprolactone Diol Polyurethanes

2022

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“…The relative intensity of ester carbonyl vibration bond was used to determine the hydrogen bonding index, HBI. Hydrogen‐bonded and non‐hydrogen‐bonded bands were investigated by Peakfit software and HBI (C = O) was calculated using Equation 28 :

{HBI}_{((), C goodbreak= O)} = \frac{A_{(C = O)}^{b}}{A_{((), C goodbreak= O)}^{b} + A_{((), C goodbreak= O)}^{italicnb}} \times 100

where

A_{((), C = O)}^{b}

and

A_{((), C = O)}^{italicnb}

denote the free and bonded carbonyl groups' peak area, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…The relative intensity of ester carbonyl vibration bond was used to determine the hydrogen bonding index, HBI. Hydrogen-bonded and nonhydrogen-bonded bands were investigated by Peakfit software and HBI (C = O) was calculated using Equation 1 28 :…”

Section: Fourier Transform Infrared Spectroscopymentioning

confidence: 99%

High‐resolution 3D printing resin reinforced by polyurethane filler particles; physical and mechanical properties

Ramezanpour,

Pourabbas

2023

Polymer Composites

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In 3D printing technology, unwanted resin properties such as low mechanical, thermal, electrical, and biocompatibility can be enhanced by using proper fillers. In this study, sucrose urethane microparticles, acrylic modified are used to improve the properties of the final object without losing other properties such as printing resolution. Modification is confirmed by FTIR spectroscopy and hydrogen bonding index enhancement after modification of the urethane filler. Filler particles are reduced in sizes by modification followed by ball‐milling as is confirmed by scanning electron microscopy. When the filler content is 2.5 wt%, mechanical tensile and flexural modulus increase compared to the neat resin however, increases the brittleness of the photo‐cured samples. Thermal degradation temperature is lifted up for 2.5–5.0 wt% of the filler loading in the resin. Improved dimensional accuracy and detailed printing in higher resolution, due to the physical effect of the filler particles, can also be achieved in real 3D‐printed object as is explored.Highlights High‐resolution 3D printing, by random geometry of filler particles in the resin. Scattering from polyurethane foam microparticles lead to high‐resolution printing. Acrylate‐modified polyurethane filler particles provide resin compatibility. Polyurethane filler leads to higher resolution with enhanced mechanical properties.

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“…In bone tissue reconstruction, biomaterial choice is a key step to design and produce materials with great biodegradability and bioactivity 81 . Modern techniques to fabricate tissue cells outside the body human have been presented by researchers as inborn imperfections and harsh bone damage that are not easy to heal and their reproduction chance is not high.…”

Section: Hydroxyapatite‐based Smpu Nanocompositesmentioning

confidence: 99%

A review on shape‐memory polyurethane nanocomposites: Focusing on the most important used nanofillers

Mohammadzadeh Koumleh,

Khoubi‐Arani,

Rahmani

2023

Polymer Engineering & Sci

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Over recent decades, great steps have been taken to study the shape‐memory polymer nanocomposites and their valuable applications by researchers. Considering the unique and distinguished applications of these materials and based on the fact that polyurethane is one of the most important shape‐memory polymers, there is still a need to publish papers associated with shape memory polyurethane nanocomposites. Despite several recent review papers related to the shape memory polyurethane nanocomposites, a specific review on the shape memory polyurethane nanocomposites that can cover the most important nanofillers used to prepare them is still lacking. This review paper not only classifies the reported studies related to the shape memory polyurethane nanocomposites either alone or with other polymers based on their nanofillers, but also has tried to find a connection between their actuation technique, nanofillers, and their applications.Highlights Recent developments in shape memory polyurethane nanocomposites were epitomized. Reported studies were classified based on the most important used nanofillers. A connection between the used nanofillers and applications was conceptualized.

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Synthesis, characterization, crystallinity, mechanical properties, and shape memory behavior of polyurethane/hydroxyapatite nanocomposites

Cited by 15 publications

References 50 publications

Influence of Starch on the Structure–Properties Relationship in Polyethylene Glycol/Polycaprolactone Diol Polyurethanes

Influence of Starch on the Structure–Properties Relationship in Polyethylene Glycol/Polycaprolactone Diol Polyurethanes

High‐resolution 3D printing resin reinforced by polyurethane filler particles; physical and mechanical properties

A review on shape‐memory polyurethane nanocomposites: Focusing on the most important used nanofillers

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