Calcium Charge and Release of Conventional Glass-Ionomer Cement Containing Nanoporous Silica

Nakamura, Kōichi; Abe, Shigeaki; Minamikawa, Hajime; Yawaka, Yasutaka

doi:10.3390/ma11081295

Cited by 8 publications

(6 citation statements)

References 34 publications

(35 reference statements)

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“…There are many reports regarding the mechanical properties of GIC with the addition of particles [ 17 , 28 , 29 , 30 ]. Alatawi et al added hydroxyapatite nanoparticles to GIC at concentrations up to 10 wt% and they found that the GIC containing hydroxyapatite nanoparticles had a greater compressive strength than GIC alone at all concentrations [ 28 ].…”

Section: Discussionmentioning

confidence: 99%

“…It is thought that the compressive strength of GIC–NPS is improved when the empty spaces between the large GIC glass particles are filled with NPS. However, NPS may interfere with GIC’s normal curing reaction when the concentration of NPS added to GIC increases [ 17 ]. Therefore, at a certain point, increasing the amount of NPS added to GIC may reduce the compressive strength of the GIC–NPS complex.…”

Section: Discussionmentioning

confidence: 99%

“…It has been reported that NPS can capture and release fenbufen [ 13 ], silver [ 14 ], and chlorhexidine [ 15 , 16 ]. Despite NPS’s accessible drug carrier properties, there are few reports of the application of NPS in dentistry [ 16 , 17 , 18 ]. We therefore focused on using NPS as a functional drug carrier.…”

Section: Introductionmentioning

confidence: 99%

“…However, this previous study did not determine the effect of NPS pore and particle size on its ability to capture and release molecules. There have been few reports of NPS added into GIC for a drug carrier release drug, and molecular and recharge ability and effect of pore and particle size were not evaluated [ 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

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Ion Capture and Release Ability of Glass Ionomer Cement Containing Nanoporous Silica Particles with Different Pore and Particle Size

et al. 2021

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This study prepared glass ionomer cement (GIC) containing nanoporous silica (NPS) (GIC–NPS) at 5 wt% concentrations using 3 types of NPS with different pore and particle sizes and evaluated the differences in their cationic ion capture/release abilities and mechanical properties. The cationic water-soluble dye was used as cationic ion. The test GIC–NPS complexes captured dyes by immersion in 1 wt% dye solutions. All the GIC–NPS complexes released dyes for 28 d, and the amount of dye released from the complexes increased with decreasing pore size; however, the particle size of NPS did not affect the amount of dye released. Additionally, GIC–NPS was able to recharge the dye, and the amount of released the dye by the complexes after recharge was almost identical to the amount released on the first charge. Although not significantly different, the compressive strength of GIC–NPS was slightly greater than that of GIC without NPS regardless of the type of NPS. These results suggest that the degree of capture and release of cationic molecules, such as drugs, can be controlled by optimizing the pore size of NPS without sacrificing its mechanical strength when its content is 5 wt%.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ion Capture and Release Ability of Glass Ionomer Cement Containing Nanoporous Silica Particles with Different Pore and Particle Size

et al. 2021

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“…Concrete is a widely-used industrial composite material, which is primarily composed of cement, sand, gravel, water, mineral admixtures (e.g., fly ash, slag, and silica fume), and chemical admixtures [1,2,3]. It is estimated that civil infrastructures including dams, long-span bridges, high-rise buildings, power plants, and harbor constructions could consume more than 10 million cubic meters of mass concrete in China every year [3,4,5].…”

Section: Introductionsmentioning

confidence: 99%

Effects of Expansive Agents on the Early Hydration Kinetics of Cementitious Binders

et al. 2019

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The addition of expansive agents could overcome the main disadvantages of raw concrete including high brittleness and low tensile strength. Few studies have investigated the early hydration kinetics of expansive cementitious binders, though the findings from the early hydration kinetics are helpful for understanding their technical performances. In this study, mixtures of 3CaO•3Al2O3•CaSO4 and CaSO4 (i.e., ZY-type™ expansive agent) with different proportions of mineral admixtures (e.g., fly ash and slag) were added into cement pastes to investigate the early hydration kinetics mechanism of expansive cementitious binders. Early hydration heat evolution rate and cumulative hydration heat were measured by isothermal calorimeter. Kinetic parameters were estimated based on the Krstulovic–Dabic model and Knudsen equations. Mechanical performances of expansive cementitious binders were tested in order to evaluate if they met the basic requirements of shrinkage-compensating materials in technical use. The early hydration heat released from cementitious binders containing ZY-type™ expansive agent was much greater than that released by pure cement, supporting the idea that addition of the expansive agent would improve the reaction of cement. The early hydration kinetic rates were decreased due to the reactions of the mineral admixture (e.g., fly ash or slag) and the ZY-type™ expansive agent in the cement system. The hydration reaction of cementitious binders containing ZY-type™ expansive agent obeyed the Krstulovic–Dabic model well. Three processes are involved in the hydration reaction of cementitious binders containing ZY-type™ expansive agent. These are nucleation and crystal growth (NG), interactions at phase boundaries (I), and diffusion (D). The 14-day expansion rates of cementitious binders containing ZY-type™ expansive agent are in the range of 2.0 × 10−4 to 3.5 × 10−4, which could meet the basic requirements of anti-cracking performances in technical use according to Chinese industry standard JGJ/T 178-2009. This study could provide an insight into understanding the effects of expansive agents on the hydration and mechanical performances of cementitious binders.

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Modeling Hydration Kinetics of the Portland-Cement-Based Cementitious Systems with Mortar Blends by Non-Assumptive Projection Pursuit Regression

2021

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Calcium Charge and Release of Conventional Glass-Ionomer Cement Containing Nanoporous Silica

Cited by 8 publications

References 34 publications

Ion Capture and Release Ability of Glass Ionomer Cement Containing Nanoporous Silica Particles with Different Pore and Particle Size

Ion Capture and Release Ability of Glass Ionomer Cement Containing Nanoporous Silica Particles with Different Pore and Particle Size

Effects of Expansive Agents on the Early Hydration Kinetics of Cementitious Binders

Modeling Hydration Kinetics of the Portland-Cement-Based Cementitious Systems with Mortar Blends by Non-Assumptive Projection Pursuit Regression

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