Microwave assisted synthesis & properties of nano HA-TCP biphasic calcium phosphate

Using microwave synthesized HAp nano powder and polymethyl methacrylate (PMMA) as a pore-forming agent, the porous biphasic calcium phosphate (BCP) ceramics were fabricated depending on the sintering temperature. The synthesized HAp powders was about 70-90 nm in diameter. In the porous sintered bodies, the pores having 150-180 μm were homogeneously dispersed in the BCP matrix. Some amounts of pores interconnected due the necking of PMMA powders which will increase the osteoconductivity and ingrowth of bone-tissues while using as a bone substrate. As the sintering temperature increased, the relative density increased and showed the maximum value of 79.6%. From the SBF experiment, the maximum resorption of Ca2+ ion was observed in the sample sintered at 1000°C.

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Microwave-assisted synthesis of cellulose/zinc-sulfate‑calcium-phosphate (ZSCAP) nanocomposites for biomedical applications

Materials Science and Engineering C ◽

10.1016/j.msec.2019.02.109 ◽

2019 ◽

Vol 100 ◽

pp. 535-543 ◽

Cited By ~ 5

Author(s):

K. Dharmalingam ◽

Ganesan Padmavathi ◽

Ajaikumar B. Kunnumakkara ◽

R. Anandalakshmi

Keyword(s):

Calcium Phosphate ◽

Zinc Sulfate ◽

Biomedical Applications ◽

Microwave Assisted Synthesis ◽

Microwave Assisted

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Microwave-assisted synthesis of calcium phosphate nanowhiskers

Journal of Materials Research ◽

10.1557/jmr.2004.0230 ◽

2004 ◽

Vol 19 (6) ◽

pp. 1876-1881 ◽

Cited By ~ 51

Author(s):

Sahil Jalota ◽

A. Cuneyt Tas ◽

Sarit B. Bhaduri

Keyword(s):

Calcium Phosphate ◽

Aqueous Solutions ◽

Tricalcium Phosphate ◽

Room Temperature ◽

Single Phase ◽

Microwave Oven ◽

Molten Salt Synthesis ◽

Microwave Assisted Synthesis ◽

Microwave Assisted ◽

Auto Ignition

Calcium phosphate [single-phase hydroxyapatite (HA), single-phase tricalcium phosphate (TCP), and biphasic HA-TCP] nanowhiskers and/or powders were produced by using a novel microwave-assisted “combustion synthesis (auto ignition)/molten salt synthesis” hybrid route. This work is an example of our “synergistic processing” philosophy combining these three technologies while taking advantage of their useful aspects. Aqueous solutions containing NaNO3, Ca(NO3)2·4H2O and KH2PO4 (with or without urea) were irradiated in a household microwave oven for 5 min at 600 watts of power. The as-synthesized precursors were then simply stirred in water at room temperature for 1 h to obtain the nanowhiskers or powders of the desired calcium phosphate bioceramics.

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Microwave-Assisted Synthesis of an Alternant Poly(fluorene–oxadiazole). Synthesis, Properties, and White Light-Emitting Devices

Polymers ◽

10.3390/polym11101562 ◽

2019 ◽

Vol 11 (10) ◽

pp. 1562

Author(s):

Dumitru Popovici ◽

Andrei Diaconu ◽

Aurelian Rotaru ◽

Luminita Marin

Keyword(s):

Oxidative Polymerization ◽

Polarized Light ◽

Gel Permeation Chromatography ◽

Complete Separation ◽

Microwave Assisted Synthesis ◽

Compact Structure ◽

Light Emitting ◽

Light Emitting Devices ◽

Microwave Assisted ◽

Synthesis Properties

An alternant poly(dihexyl fluorene-co diphenyl oxadiazole) has been synthetized by microwave-assisted oxidative polymerization. The structure has been confirmed by 1H-NMR and FTIR spectroscopies. Gel permeation chromatography indicated high molecular weight and low polydispersity index. DFT calculations suggested a complete separation of HOMO and LUMO orbitals, which were located on fluorene and oxadiazole moiety, respectively. X-ray diffraction, polarized light microscopy, and atomic force microscopy indicated the polymer tendency to stack into a layered morphology with a more compact structure for the films prepared by spin coating. Furthermore, UV-vis and photoluminescence spectroscopies indicated the formation of H-aggregates which played a key role in photoluminescence quenching in solid state. Nevertheless, the good charge mobility gained due to the orbital overlapping in H-aggregates led to excellent electroluminescence, which enabled the development of white OLED devices with outstanding stability.

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