Time-dependent degradation behaviour of phosphate glass fibre reinforced composites with different fibre architecture

Zhu, Chenkai; Liu, Jinsong; Zhang, Yan; Zu, Qun; Rudd, Chris; Liu, Xiao‐Ling

doi:10.1007/s11043-020-09467-9

Cited by 5 publications

(3 citation statements)

References 34 publications

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“…Composites with 15wt.% glass showed a more gradual loss of strength, while those with higher glass content again suffered a larger strength decrease. Similar reductions in composite mechanical properties during degradation are seen in the literature, usually attributed to wicking and water absorption [27].…”

Section: Evolution Of Mechanical Propertiessupporting

confidence: 82%

The evolution of the structure and mechanical properties of fully bioresorbable polymer-glass composites during degradation

Oosterbeek,

Zhang,

Best

et al. 2021

Preprint

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Fully bioresorbable polymer matrix composites have long been considered as potential orthopaedic implant materials, however their combination of mechanical strength, stiffness, ductility and bioresorbability is also attractive for cardiac stent applications. This work investigated reinforcement of polylactide-based polymers with phosphate glasses, addressing key drawbacks of current polymer stents, and examined the often-neglected evolution of structure and mechanical properties during degradation. Incorporation of 15 -30wt.% phosphate glass led to modulus increases of up to 80% under simulated body conditions, and 15wt.% glass composites retained comparable ductility to pure polymers, crucial for stent applications where ductility and stiffness are required. Two-stage degradation was observed, dominated by interfacial water absorption and glass dissolution. Polymer embrittlement mechanisms (crystallisation, enthalpy relaxation) were suppressed by glass addition, allowing composites to achieve a more controlled loss of mechanical properties during degradation, which could allow gradual transfer of loading to newly healed tissue. These results provide a valuable new system for understanding the structural and mechanical changes occurring during degradation of fully bioresorbable polymer matrix composites, providing important new data to underpin the design of effective cardiac stent materials.

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Section: Evolution Of Mechanical Propertiessupporting

confidence: 82%

The evolution of the structure and mechanical properties of fully bioresorbable polymer-glass composites during degradation

Oosterbeek,

Zhang,

Best

et al. 2021

Preprint

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show abstract

“…As such, the properties of the controllable ion release kinetics of PBGF composites showed the PVA hydrogel had sustained capabilities, proving it more suitable for cartilage repair than previous materials. In the preliminary study, the biodegradable-glass-fiber-reinforced polylactic acid (PLA) composites, with excellent mechanical performance matching the requirements of bone repair, were observed to degrade rapidly when immersed in PBS [ 35 ]. Almost all fibers were degraded by the 15th day, mainly due to the acidity ions aggregated in the interface with autocatalytic degradation issues.…”

Section: Resultsmentioning

confidence: 99%

Biodegradable-Glass-Fiber Reinforced Hydrogel Composite with Enhanced Mechanical Performance and Cell Proliferation for Potential Cartilage Repair

Zhu

Huang

Zhang

et al. 2022

IJMS

Self Cite

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Polyvinyl alcohol (PVA) hydrogels are promising implants due to the similarity of their low-friction behavior to that of cartilage tissue, and also due to their non-cytotoxicity. However, their poor mechanical resistance and insufficient durability restricts their application in this area. With the development of biodegradable glass fibers (BGF), which show desirable mechanical performance and bioactivity for orthopedic engineering, we designed a novel PVA hydrogel composite reinforced with biodegradable glass fibers, intended for use in artificial cartilage repair with its excellent cytocompatibility and long-term mechanical stability. Using structure characterization and thermal properties analysis, we found hydrogen bonding occurred among PVA molecular networks as well as in the PVA–BGF interface, which explained the increase in crystallinity and glass transition temperature, and was the reason for the improved mechanical performance and better anti-fatigue behavior of the composites in comparison with PVA. The compressive strength and modulus for the PBGF-15 composite reached 3.05 and 3.97 MPa, respectively, equaling the mechanical properties of human articular cartilage. Moreover, the increase in BGF content was found to support the proliferation of chondrocytes in vitro, whilst the PVA hydrogel matrix was able to control the ion concentration by adjusting the ions released from the BGF. Therefore, this novel biodegradable-glass-fiber-reinforced hydrogel composite possesses excellent properties for cartilage repair with potential in medical application.

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“…The mass loss was 14% after 6 weeks of degradation in deionized water. Zhu et al [20] prepared composites of phosphate GF-reinforced PLA with different ber interlayer structures by a molding process. The unidirectional ber-reinforced composites were observed to have the best bending strength and modulus, while the short-cut bers performed the worst.…”

Section: Introductionmentioning

confidence: 99%

Interlaminar shear and flexural properties of three-dimensional braided glass fiber/polylactic acid composites

Wang,

Lv,

Chen

2023

Preprint

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To address the problem of environmental pollution caused by the transitional use of petroleum-based composites, a green and environmentally friendly thermoplastic resin compound molding process is proposed. In this study, continuous glass fiber (GF) reinforced polylactic acid (PLA) composites were prepared. The coupling agent KH550 was used to modify the preforms to enhance the interfacial properties. The three-dimensional (3D) braiding technology and hot pressing were adopted to produce the samples. Then, the crystallinity, transverse shear stress, interlaminar shear, and bending properties of samples were tested. Finally, the effects of GF content, preform thickness, cutting edge, and KH550 concentration on the longitudinal bending properties of composites were investigated. The results showed that GF improved the crystallinity of PLA, and the bending performance was better at a GF content of 40% and a preform thickness of 9 mm. The cutting edge has little effect on the mechanical properties of the composites and can be cut according to the requirements. The best mechanical properties are achieved at a KH550 concentration of 40%.

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Time-dependent degradation behaviour of phosphate glass fibre reinforced composites with different fibre architecture

Cited by 5 publications

References 34 publications

The evolution of the structure and mechanical properties of fully bioresorbable polymer-glass composites during degradation

The evolution of the structure and mechanical properties of fully bioresorbable polymer-glass composites during degradation

Biodegradable-Glass-Fiber Reinforced Hydrogel Composite with Enhanced Mechanical Performance and Cell Proliferation for Potential Cartilage Repair

Interlaminar shear and flexural properties of three-dimensional braided glass fiber/polylactic acid composites

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