Investigating the effect of ultrasonic irradiation on synthesis of calcium carbonate using Box-Behnken experimental design

Kırboğa, Semra; Öner, Mualla

doi:10.1016/j.powtec.2016.11.042

Cited by 20 publications

(11 citation statements)

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“…The following formula was used to calculate the crystallinity of polymer composites: 4 interaction between functional groups and the crystallizing species is the adsorption of the functional groups onto the pre-nuclear cluster. 18,20 In this work, the observed changes of the precipitate morphology in the presence of PVS indicate that polymer affects the nucleation and crystal growth calcium carbonate. We can suggest that incorporation of PVS into the crystallization medium slows down the nucleation growth rate of calcium carbonate and therefore calcite growth is poisoned.…”

Section: Thermal Properties Of Phbv Compositesmentioning

confidence: 56%

“…The complete experimental procedures were reported previously. 18,20 The schematic representation of the synthesis of calcium carbonate was given in Figure 1. Ultrasound was applied for 5 minute by use of an ultrasound probe into the reaction.…”

Section: Preparation Of Calcium Carbonate (Caco 3 ) Particlesmentioning

confidence: 99%

“…Calcium carbonate samples were first outgassed at 80 °C. The nitrogen adsorption isotherm has been performed by additions of gaseous nitrogen to the tube containing the sample at 77 K. 18 FTIR analysis was performed by using BRUKER Alpha-P in the 400-4000 cm −1 region at a resolution 4 cm -1 . FT-IR analysis was given in ATR-reflectance mode.…”

Section: Characterization Of Particles and Compositesmentioning

confidence: 99%

“…Calcium carbonate (CaCO 3 ) is highly abundant mineral in the earth's crust and is used in many industries such as pigment, cosmetic, plastic, rubber, paper, and electronics. 18 CaCO 3 used in the plastic industry leads to a decrease in surface energy, opacity and surface gloss. 19 The impact strength, elongation at break and stiffness of polymer can be increased with using calcium carbonate with the suitable particle size.…”

Section: Introductionmentioning

confidence: 99%

“…19 CaCO 3 exhibits three polymorphic forms; vaterite, aragonite, and calcite, listed in order of increasing stability. 18 While calcite is the most thermo-dynamically stable form of calcium carbonate, vaterite and aragonite are thermodynamically unstable forms of calcium carbonate. Unstable forms of calcium carbonate can be stabilized with using additives.…”

Section: Introductionmentioning

confidence: 99%

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Oxygen Barrier and Thermomechanical Properties of Poly (3-hydroxybutyrate-co-3-hydroxyvalerate) Biocomposites Reinforced with Calcium Carbonate Particles

Kırboğa

Öner

2020

ACSi

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This study aimed to prepare poly (3-hydroxybutyrate-co-3-hydroxyvalerate), biocomposites with incorporating various percentages of calcium carbonate using extrusion processing. Calcium carbonate was synthesized in the absence and presence of poly(vinyl sulfonic acid). The polymorph and morphology of calcium carbonate chanced with the introduction of poly(vinyl sulfonic acid). The rhombohedral calcite was obtained in the absence of poly(vinyl sulfonic acid). Rhombohedral calcite transformed into spherical vaterite with the addition of poly(vinyl sulfonic acid). The influence of filler contents on the properties of poly (3-hydroxybutyrate-co-3-hydroxyvalerate) composites was studied. The structure and properties of poly (3-hydroxybutyrate-co-3-hydroxyvalerate)/ calcium carbonate biocomposites were investigated by XRD, FTIR, TGA, DSC, SEM, OTR and DMA. The nucleation effect of the calcium carbonate on the crystallization of poly (3-hydroxybutyrate-co-3-hydroxyvalerate) was observed in the DSC and XRD measurements by increasing crystallinity of poly (3-hydroxybutyrate-co-3-hydroxyvalerate). It was shown that the variation of the barrier properties of biocomposites was influenced by polymorph and morphology of calcium carbonate. The addition of 0.5 wt% of the rhombohedral calcite and spherical vaterite increased the barrier properties by 25% and 12%, respectively compared to neat polymer. The dynamic mechanical properties of composites based on rhombohedral calcite and spherical vaterite in poly (3-hydroxybutyrate-co-3-hydroxyvalerate) matrix were investigated. The storage modulus increases by adding both particles in the composites over a wide range of temperature (-30 to 150 °C) where the reinforcing effect of calcite and vaterite was confirmed. At the same loading level, rhombohedral calcite led to more increase in the storage modulus, while less increase in storage modulus was observed in the presence of spherical vaterite particles.

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Section: Thermal Properties Of Phbv Compositesmentioning

confidence: 56%

Section: Preparation Of Calcium Carbonate (Caco 3 ) Particlesmentioning

confidence: 99%

Section: Characterization Of Particles and Compositesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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