<i>In situ</i> preparation and characterization of biocompatible acrylate‐terminated polyurethane containing chemically modified multiwalled carbon nanotube

Alishiri, M.; Shojaei, Akbar

doi:10.1002/pc.24423

Cited by 10 publications

(5 citation statements)

References 74 publications

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“…However, the brittle nature and toxicity of the acrylated polymers limited the applications of the two systems toward the biomedical field, especially in tissue engineering. More and more attention has been focused on the development of biocompatible or biodegradable acrylates over the years [14,15,16].…”

Section: Introductionmentioning

confidence: 99%

Study of Physical and Degradation Properties of 3D-Printed Biodegradable, Photocurable Copolymers, PGSA-co-PEGDA and PGSA-co-PCLDA

et al. 2018

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As acrylated polymers become more widely used in additive manufacturing, their potential applications toward biomedicine also raise the demand for biodegradable, photocurable polymeric materials. Polycaprolactone diacrylate (PCLDA) and poly(ethylene glycol) diacrylate (PEGDA) are two popular choices of materials for stereolithography (SLA) and digital light processing additive manufacturing (DLP-AM), and have been applied to many biomedical related research. However, both materials are known to degrade at a relatively low rate in vivo, limiting their applications in biomedical engineering. In this work, biodegradable, photocurable copolymers are introduced by copolymerizing PCLDA and/or PEGDA with poly(glycerol sebacate) acrylate (PGSA) to form a network polymer. Two main factors are discussed: the effect of degree of acrylation in PGSA and the weight ratio between the prepolymers toward the mechanical and degradation properties. It is found that by blending prepolymers with various degree of acrylation and at various weight ratios, the viscosity of the prepolymers remains stable, and are even more 3D printable than pure substances. The formation of various copolymers yielded a database with selectable Young’s moduli between 0.67–10.54 MPa, and the overall degradation rate was significantly higher than pure substance. In addition, it is shown that copolymers fabricated by DLP-AM fabrication presents higher mechanical strength than those fabricated via direct UV exposure. With the tunable mechanical and degradation properties, the photocurable, biodegradable copolymers are expected to enable a wider application of additive manufacturing toward tissue engineering.

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Section: Introductionmentioning

confidence: 99%

Study of Physical and Degradation Properties of 3D-Printed Biodegradable, Photocurable Copolymers, PGSA-co-PEGDA and PGSA-co-PCLDA

et al. 2018

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“…Two specific modes of CO groups, such as free urethane carbonyl groups (1730 cm −1 ) and urethane bonded carbonyl groups (1702 cm −1 ), are observed in this region. The absorption bands appearing around 2850–2950 cm −1 are corresponding to CH stretching vibration of APUAs, whereas the peak appearing around 3200–3500 cm −1 is assigned to NH groups in urethane unit …”

Section: Resultsmentioning

confidence: 99%

Effect of reactive diluent on gas separation behavior of photocurable acrylated polyurethane composite membranes

Molavi

Shojaei

Mousavi

et al. 2019

J of Applied Polymer Sci

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In this study, the effects of the type and content of reactive diluents on the permeation/separation of carbon dioxide/nitrogen (CO 2 /N 2 ) through acrylate-terminated polyurethane (APU)-acrylate/acrylic diluent (APUA) composite membranes was investigated. A series of APUs based on poly(ethylene glycol) (PEG)-1000 g mol −1 , toluene diisocyanate, and 2-hydroxyethyl methacrylate was synthesized and then diluted with several reactive diluents. The results obtained from differential scanning calorimetry (DSC) and Fourier transform infrared analyses showed that the microphase interference of hard and soft segments increased with increasing reactive diluent content. Furthermore, with increasing alkene double bond of reactive diluents, the degree of phase separation increased, which might be due to the higher gel content of APUAs. APUAs were used as top selective layer on PS/PSF as the support layer to obtain composite membrane. Field emission scanning electron microscopy micrographs revealed that APUAs penetrated into the support layer, leading to strong interfacial adhesion between APUA and support layers. The gas permeation experiments indicated that the gas permeability decreased, while the CO 2 /N 2 selectivity increased with increasing reactive diluent content due to the enhancement of crosslinking density of APUAs. Moreover, the reactive diluent with high polarity, for example, acrylonitrile monomer, exhibited higher CO 2 /N 2 selectivity due to the improvement in solubility of CO 2 in APUA, while the permeability was retained compared with other reactive diluents. The thickness of APUA selective layer exhibited expectedly opposite effect on permeability and selectivity; however, the increment in selectivity is higher than the reduction in permeability when the thickness decreased from 50 to 10 μm.

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“…The simplest and most effective strategy for enhancing the mechanical strength of the gel is the organic–inorganic (OI) self‐assembling nanocomposite hydrogel (NC gel). A variety of inorganic ultrafine particles are interstitial into the network structure of the hydrogel, such as clay, graphene oxide, carbon nanotubes, nano‐silica, and hydroxyapatite . These inorganic powders can be present in the organic polymer matrix in a filled manner or can serve as a network‐crosslinking center.…”

Section: Introductionmentioning

confidence: 99%

Water‐swellable, tough, and stretchable inorganic–organic sulfoaluminate cement/polyacrylamide double‐network hydrogel composites

Chu

Song

Zhao

2019

J of Applied Polymer Sci

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Effectively improving the mechanical properties of the hydrogel can greatly broaden its application range. The design concept of forming a double-network structure by organic-inorganic hybridization can greatly enhance the mechanical properties of traditional hydrogels. Here, a series of organic-inorganic double-network (OIDN) polyacrylamide/(sulfoaluminate cement) (PAM/SAC) composite gels by solution polymerization were synthesized at room temperature. The OIDN composite gels not only retain the characteristics of water swelling but also exhibit excellent tensile properties (stress and strain are 12 MPa and 2500%, respectively) and compressive strength (stress and strain are 65 MPa and 80%, respectively). In the preparation process, a brittle inorganic network of hydrated sulfoaluminate (hydra-SAC) and a ductile network of polyacrylamide (PAM) were formed by the manner of interpenetrating. The phase composition and thermal stability of the OIDN composite gels were characterized and determined by FTIR, XRD, SEM, and TGA, respectively. The effect of SAC on swelling and mechanical performance of the OIDN composite gels was also investigated. The results show that the use of SAC hybrid hydrogels can effectively improve the mechanical strength, and the OIDN composite gels are expected to be a potential grouting and plugging functional material.

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In situ preparation and characterization of biocompatible acrylate‐terminated polyurethane containing chemically modified multiwalled carbon nanotube

Cited by 10 publications

References 74 publications

Study of Physical and Degradation Properties of 3D-Printed Biodegradable, Photocurable Copolymers, PGSA-co-PEGDA and PGSA-co-PCLDA

Study of Physical and Degradation Properties of 3D-Printed Biodegradable, Photocurable Copolymers, PGSA-co-PEGDA and PGSA-co-PCLDA

Effect of reactive diluent on gas separation behavior of photocurable acrylated polyurethane composite membranes

Water‐swellable, tough, and stretchable inorganic–organic sulfoaluminate cement/polyacrylamide double‐network hydrogel composites

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