Dissolution behavior of ternary alkali-alkaline earth-borate glasses in water

Goetschius, Kathryn; Beuerlein, Michaela A.; Bischoff, Christian; Brow, Richard K.

doi:10.1016/j.jnoncrysol.2018.02.011

Cited by 30 publications

(12 citation statements)

References 22 publications

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“…The chemical resistance to water attack in aluminoborate glasses is expected to increase with increasing fraction of fourfold coordinated boron, higher degree of network cross‐linking, and the substitution of B–O by Al–O bonds, as the former are more susceptible to nucleophilic attack . However, the structural dependence of chemical durability in borate glasses containing alumina remains poorly understood.…”

Section: Introductionmentioning

confidence: 99%

Structural dependence of chemical durability in modified aluminoborate glasses

et al. 2018

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Alkali and alkaline earth aluminoborate glasses feature high resistance to cracking under sharp contact loading compared to other oxide glasses. However, due to the high content of hygroscopic B2O3, it is expected that applications of these glasses could be hindered by poor chemical durability in aqueous solutions. Indeed, the compositional and structural dependence of their dissolution kinetics remains unexplored. In this work, we correlate the dissolution rates of aluminoborate glasses in acidic, neutral, and basic solutions with the structural changes induced by varying the aluminum‐to‐boron ratio. In detail, we investigate a total of seventeen magnesium, lithium, and sodium aluminoborate glasses with fixed modifier content of 25 mol%. We show that the structural changes induced by alumina depend on the network modifier. We also demonstrate a correlation between the chemical durability at various pH values and the structural changes in Mg‐, Li‐ and Na‐aluminoborate glasses. The substitution of alumina by boron oxide leads to a general decrease in chemical corrosion in neutral and acidic solutions. The lowest dissolution rate value is observed in Mg‐aluminoborate glasses, as a consequence of the intermediate character of magnesium which can increase the network cross‐linking. For basic solutions, the chemical durability is almost constant for the different amount of alumina in the three series, likely because B2O3 is susceptible to nucleophilic attack, which is favored in high‐OH− solutions.

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Section: Introductionmentioning

confidence: 99%

Structural dependence of chemical durability in modified aluminoborate glasses

et al. 2018

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“…25 SGBGs have also been incorporated into polymer matrices to enhance composite bioactivity, 26 while compositions doped with silver, have demonstrated antibacterial properties. 27 Interest in bioactive borate glasses has led to many 'unique' compositions [27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43] such as ''1605''. [44][45][46] However, despite fundamental differences between borate and silicate glass structure, many borate compositions, including our previous work, [23][24][25][26]47 have been based on ''traditional'' silicate glass compositions like Bioglass s ''45S5'', 15,[23][24][25][26][47][48][49][50] ''13-93'', 14,16,17,[51][52][53][54][55][56][57]…”

Section: Introductionmentioning

confidence: 99%

The anomaly in bioactive sol–gel borate glasses

Lepry

Nazhat

2020

Mater. Adv.

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“…MacDonald, et al 24 was investigated controlling of Sr release from B 2 O 3 –SrO–Na 2 O borate glass by substitution of Na 2 O for SrO. Also, Goetschius, et al 25 were in vitro characterized the compositional dependence of xM 2 O‐xM′O‐(100‐2x)B 2 O 3 glass system (MLi, Na or K, M′Mg, Ca, or Sr) on the glass solubility in water. Recently, we in vivo studied the effect of substitution of CaO by SrO of bone formation of 60 B 2 O 3 –20 Na 2 O–(20‐x) CaO–xSrO (wt %).…”

Section: Introductionmentioning

confidence: 99%

Role of alkali metal oxide type on the degradation and in vivo biocompatibility of soda‐lime‐borate bioactive glass

et al. 2020

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In this work, it is the first time to study the effect of replacing of Na2O by a fixed amount of Li2O or K2O in soda‐lime‐borate glass on its in vivo biocompatibility. The glass composition was based on xM2O‐20x Na2O20 CaO60 B2O3, (wt %), where, M2OLi2O and K2O, and consequently, samples encoded BN100, BK50, and BL50. The degradation test was carried out in 0.25 M K2HPO4 solution. The in vivo test was performed in the femoral bone defect of Sprague–Dawley adult male rat. Following up bone formation was conducted by the histological analyses and bone formation markers (alkaline phosphatase [ALP] and osteocalcin [OCN]). Furthermore, the glass effect on the liver and kidney functions was addressed in this study using (alanine transaminase [ALT] and aspartate transaminase [AST]) and (urea and creatinine), respectively. The results of the degradation test showed that the glass dissolution rate was increased by incorporating of K2O, and its ion release was occurred by a diffusion‐controlled process. Moreover, in vivo bioactivity test showed that serum activity of ALP, OCN level, and the newly formed bone was higher in BL50‐implanted group than that of BN100 andBK50at 3 w and 6 w post‐surgery. As well as, implantation of all glass samples in the femoral bone defect did not alter the liver and kidney functions. In conclusion, the synthesized borate glass was well served as a controlled delivery system for Li+ ion release, which enhanced bone formation as shown from the bone formation markers (ALP and OCN).

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Dissolution behavior of ternary alkali-alkaline earth-borate glasses in water

Cited by 30 publications

References 22 publications

Structural dependence of chemical durability in modified aluminoborate glasses

Structural dependence of chemical durability in modified aluminoborate glasses

The anomaly in bioactive sol–gel borate glasses

Role of alkali metal oxide type on the degradation and in vivo biocompatibility of soda‐lime‐borate bioactive glass

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