Thermal and hydrolytic stability of silver nanoparticle polyurethane biocomposites for medical applications

Macocinschi, Doina; Filip, Daniela; Zaltariov, Mirela F.; Varganici, Cristian–Dragos

doi:10.1016/j.polymdegradstab.2015.09.017

Cited by 32 publications

(18 citation statements)

References 37 publications

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“…hyaluronic acid into a PEA/4,4′-MDI/EG-based PU was found to increase the hydrophilicity and favor the hydrolytic degradation [447]. However, contrary to this, Liu et al [457] prepared aliphatic PEsUs based on PCL with surface-grafting of hydrophilic polyethylene glycol (PEG), which maintained their mechanical properties for more than six months and only lost 25% weight after 18 months in PBS (pH = 7.4).…”

Section: Incorporation Of Extracellular Matrix Components Such As Chomentioning

confidence: 99%

“…The other end is a carboxyl group (-COOH), which is acidic [446,447]. This acidic carboxyl group speeds up the further hydrolysis of the polyester segments in the PEsU, and the degradation becomes autocatalytic [446,448].…”

Section: Hydrolytic Degradation Of Poly(ester-urethane)smentioning

confidence: 99%

“…This acidic carboxyl group speeds up the further hydrolysis of the polyester segments in the PEsU, and the degradation becomes autocatalytic [446,448]. The urethane linkage may also be hydrolysed to give an alcohol, an amine, and carbon dioxide [59,446,447,449]; and urea bonds could be hydrolysed into two amines and carbon dioxide [59].…”

Section: Hydrolytic Degradation Of Poly(ester-urethane)smentioning

confidence: 99%

“…The incorporation of ZnO nanoparticles into PU formulations has also been found to be effective in protecting the PU material against hydrolytic degradation in NaCl solution [293,296,496]. Silver nanoparticles were also reported to be effective in stabilizing PEsUs [447]. During hydrolysis, increased hydrogen bonding and crystallinity were observed, especially for silver nanoparticlestabilized PU matrices [447].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

See 3 more Smart Citations

Degradation and stabilization of polyurethane elastomers

Xie

Zhang

Bryant

et al. 2019

Progress in Polymer Science

454

301

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Section: Incorporation Of Extracellular Matrix Components Such As Chomentioning

confidence: 99%

Section: Hydrolytic Degradation Of Poly(ester-urethane)smentioning

confidence: 99%

Section: Hydrolytic Degradation Of Poly(ester-urethane)smentioning

confidence: 99%

Section: Accepted Manuscriptmentioning

confidence: 99%

See 2 more Smart Citations

Degradation and stabilization of polyurethane elastomers

Xie

Zhang

Bryant

et al. 2019

Progress in Polymer Science

454

301

View full text Add to dashboard Cite

show abstract

“…Polyurethane elastomer (PUE) is a polymer made from polyisocyanate, polyether, or polyester polyol, and chain extender or crosslinking agent through stepwise addition polymerization . PUE has good physical and mechanical properties, such as high modulus and high tensile strength, and is widely used in construction, medicine, biological materials, and other fields . However, the flammability of PUE limits its use.…”

Section: Introductionmentioning

confidence: 99%

Synergistic effect between zeolitic imidazolate framework‐8 and expandable graphite to improve the flame retardancy and smoke suppression of polyurethane elastomer

Wang

Chen

et al. 2019

J of Applied Polymer Sci

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Zeolitic imidazolate framework-8 (ZIF-8) was synthesized at room temperature, and then added with expandable graphite (EG) to polyurethane elastomer (PUE) to study their flame retardancy and smoke suppression of PUE. The results showed that when the total flame retardant was 3 wt % and the ratio of ZIF-8 and EG was 1:3, it had the best effect on the flame retardancy and smoke suppression of PUE. Compared with pure PUE, the peak heat release rate, the total heat release, and the maximum smoke density values of Z1E3 decreased by 83.4, 42.6, and 22.4%, respectively. Moreover, the limited oxygen index value of Z1E3 increased to 30.2% and its UL-94 vertical burning test reached V-1 rating. This was because ZIF-8 synergized with EG to make the intumescent char layer compact, resulting in improved flame retardancy and smoke suppression of PUE. The specific mechanism of flame retardancy and smoke suppression is also discussed in this article.

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Effect of chain extenders on the hydrolytic degradation of soybean polyurethane

Favero

Marcon

Agnol

et al. 2022

J of Applied Polymer Sci

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This publication highlights the effect that different chain extenders (CEs) have on the structure–property relationships of soy‐based polyurethanes that have been exposed to hydrolytic degradation for 480 and 960 h at 80°C. Gel content, crosslinking densities, surface energy, atomic force microscopy, dielectric, and dynamic mechanics were used for monitored structural changes. Polyurethanes (PU) is composed of a structure with minor phase separation when a chain extender is not used, maintaining all properties over time. However, when a chain extender, butane‐1.4‐diol (BDO), ethane‐1.2‐diol (MEG) our (2‐hydroxypropoxy)‐propane‐2‐ol are added, it is noted that there is a more significant degradation in the flexible domains, modifying the fraction between the initial rigid (HS)/soft (SS) segment that makes the polymer stiff and brittle. The hydrolysis degradation generates new Fourier transform infrared bands relative to urea (1640 cm−1) and amide (1800 cm−1). The reduction in band intensity of the C=Ofree at 1730 cm−1, while increasing the intensity of C=Obonded at 1710 cm−1 indicated a higher phase separation degree. After 960 h the TgS decreased, while the TgH was practically unchanged. The higher polarization observed in the PUs with BDO and MEG samples indicates the increased phase separation resulting in hydrolytic degradation.

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Thermal and hydrolytic stability of silver nanoparticle polyurethane biocomposites for medical applications

Cited by 32 publications

References 37 publications

Degradation and stabilization of polyurethane elastomers

Degradation and stabilization of polyurethane elastomers

Synergistic effect between zeolitic imidazolate framework‐8 and expandable graphite to improve the flame retardancy and smoke suppression of polyurethane elastomer

Effect of chain extenders on the hydrolytic degradation of soybean polyurethane

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