Engineering a new generation of thermoset self-healing polymers based on intrinsic approaches

Fugolin, Ana Paula Piovezan; Pfeifer, Carmem S.

doi:10.1016/j.jfscie.2022.100014

Cited by 4 publications

(3 citation statements)

References 79 publications

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“…The studies carried out until now on auto-repair polymeric materials have resulted in innumerable healing designs that recently are focused on complex systems capable of supporting multiple cycles [1][2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Temperature on the Functionalization Process of Structural Self-Healing Epoxy Resin

et al. 2023

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This work deals with developing a self-healing resin designed for aeronautical and aerospace applications. The bifunctional epoxy precursor was suitably functionalized to enhance its toughness to realize good compatibilization with a rubber phase dispersed in the hosting epoxy resin. Subsequently, the resulting mixture was loaded with healing molecules. The effect of the temperature on the epoxy precursor’s functionalization process was deeply studied. Fourier trans-former infrared (FT-IR) spectroscopy and dynamic mechanical analyses (DMA) evidenced that the highest temperature (160 °C) allows for obtaining a bigger amount of rubber phase bonded to the matrix. Elastomeric domains of dimensions lower than 500–600 nanometers were found well distributed in the matrix. Self-healing efficiency evaluated with the tapered double cantilever beam (TDCB) method evidenced a healing efficiency for the system functionalized at 160 °C higher than 69% for all the explored fillers. The highest value was detected for the sample with DBA, for which 88% was found. The healing efficiency of the same sample functionalized at 120 °C was found to decrease to the value of 52%. These results evidence the relevant role of the amount and distribution of rubber domains into the resin for improving the resin’s dynamic properties. The adopted strategy allows for optimizing the self-healing performance.

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Section: Introductionmentioning

confidence: 99%

Effect of Temperature on the Functionalization Process of Structural Self-Healing Epoxy Resin

et al. 2023

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“…Another area that is of intense interest for development is that of self-healing composites. Materials can be designed to stop cracks from propagating to failure by healing the damaged crack region using either an intrinsic (i.e., incorporation of encapsulated healing agents in the material that are released during cracking) or extrinsic (i.e., application of external sources of energy such as heat or light) approach [98,99]. Such materials would be capable of responding to the stress field created by a propagated crack to repair and close it, making it more resistant to further cracking.…”

Section: New Directions In Dental Composite Technologymentioning

confidence: 99%

A Historical Perspective on Dental Composite Restorative Materials

Ferracane

2024

JFB

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This review article will discuss the origin of resin-based dental composite materials and their adoption as potentially useful adjuncts to the primary material used by most dentists for direct restorations. The evolution of the materials, largely driven by the industry’s response to the needs of dentists, has produced materials that are esthetic, strong, and versatile enough to be used in most areas of the oral cavity to replace or restore missing tooth structures. Significant advancements, such as the transition from chemical to light-curing materials, refinements in reinforcing particles to produce optimum polishing and wear resistance, formulating pastes with altered viscosities to create highly flowable and highly stiff materials, and creating materials with enhanced depth of cure to facilitate placement, will be highlighted. Future advancements will likely reflect the movement away from simply being a biocompatible material to one that is designed to produce some type of beneficial effect upon interaction within the oral environment. These new materials have been called “bioactive” by virtue of their potential effects on bacterial biofilms and their ability to promote mineralization of adjacent tooth structures.

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“…Aesthetic characteristics and toxicity reasons associated with amalgam fillings have strongly motivated the dental industry to promote composite resins to direct restorations [ 1 ]. Nevertheless, the oral cavity constitutes a dynamic regime governed by high masticatory stresses in combination with several biological and chemical threats that can affect the longevity of dental composites [ 2 , 3 ]. To overcome these limiting factors, composites’ formulations are usually manipulated by the utilization of dimethacrylate monomers such as Bis-GMA, UDMA, and TEGDMA reinforced with diverse inorganic fillers that are conjugated with the polymer matrix through silane coupling agents.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Dental Nanocomposite Resins Reinforced with Dual Organomodified Silica/Clay Nanofiller Systems

Saridou,

Nikolaidis,

Koulaouzidou

et al. 2023

JFB

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Quaternary ammonium (QA) compounds have been widely studied as potential disinfectants in dental restorative materials. The present work investigates whether the gradual displacement of nanosilica by QA-clay nanoparticles may have an impact on the physicochemical and mechanical properties of dental nanocomposite resins. For this purpose, Bis-GMA/TEGDMA-based composite resins were initially synthesized by incorporating 3-(trimethoxysilyl)propyl methacrylate (γ-MPS)-modified nanosilica/QA-clay nanoparticles at 60/0, 55/5, 50/10, 40/20, and 30/30 wt% filler loadings. Their structural characterization was performed by means of scanning electron microscopy (SEM) and X-ray diffraction analysis (XRD). The degree of double bond conversion (DC) over time and the polymerization shrinkage were determined with Fourier transform infrared spectroscopy (FTIR) and a linear variable displacement transducer (LVDT), respectively. Mechanical properties as well as water sorption and solubility parameters were also evaluated after storage of nanocomposites in water for 7 days at 37 °C. Spectral data revealed intercalated clay configurations along with areas characterized by silica-clay clusters for clay loadings up to 30 wt%. Furthermore, the insertion of 10 wt% QA-clay enhanced the auto-acceleration effect also sustaining the ultimate (DC), reduced the setting contraction and solubility, and, finally, yielded flexural modulus and strength very close to those of the control nanocomposite resin. The acquired results could herald the advanced design of dental restorative materials appropriate for contemporary clinical applications.

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Engineering a new generation of thermoset self-healing polymers based on intrinsic approaches

Cited by 4 publications

References 79 publications

Effect of Temperature on the Functionalization Process of Structural Self-Healing Epoxy Resin

Effect of Temperature on the Functionalization Process of Structural Self-Healing Epoxy Resin

A Historical Perspective on Dental Composite Restorative Materials

Synthesis and Characterization of Dental Nanocomposite Resins Reinforced with Dual Organomodified Silica/Clay Nanofiller Systems

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