Biomimetic synthesis of micrometer spherical hydroxyapatite with β-cyclodextrin as template

Xiao, Xiufeng; Liu, Rongfang; Qiu, C. F.; Zhu, Donghui; Liu, Fang

doi:10.1016/j.msec.2008.07.015

Cited by 43 publications

(28 citation statements)

References 20 publications

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“…The XRD patterns of synthesized POCAs showed the peaks attributed to the HA crystalline phase at around 22.6, 25.9, 28.2, 31.8, 32.1, 33.5, (111), (002), (210), (211), (112), (300), (202), (310), (222), (213) and (004) planes. 18) This XRD pattern was matched with the structural data of HA described in the Powder Diffraction File (JCPDS 09-432). However, all the peaks were broad diffraction peaks indicating a poorly crystallized HA phase.…”

Section: ¹1mentioning

confidence: 57%

“…Thus, these interactions between Ca 2+ and polymers are one of the influence factors on the nucleation and growth of the spherical HA crystals during the mineralization process. 18) At this point, the growth of HA crystals are classified into the two regimes based on the driving force of reaction. 12) At low pH, the growing interface can move only laterally for layer-by-layer growth because of low driving force available for the motion of the growing interface, in which the driving force can be given by the associated volume free energy change.…”

Section: Morphology Of Poca Nanocompositesmentioning

confidence: 99%

“…In addition, since the negatively charged side groups of polymers can provide binding sites for the Ca 2+ ions present in the solution, the formation of positively charged OHCa 6 is accelerated. 18) These positively charged surface sites will combine with negatively charged CaP 6 O 24 at the horizontal and vertical axes with the same speed initiating the growth of the spherical nanocomposites.…”

Section: Morphology Of Poca Nanocompositesmentioning

confidence: 99%

“…18) These CO 2 3¹ ions were formed by the reaction of CO 2 present in the atmosphere with OH ¹ ions of reaction medium. These data suggest that the POCAs were mainly composed of HA phase and the chemical structure of products was not changed with pH.…”

Section: ¹1mentioning

confidence: 99%

“…It was already found that the HA nanoparticles synthesized with ¢-CD exhibited only a broad diffraction peak and the HA phase was poorly crystallized. 18) In addition, the composition of POCAs was determined by XRF. The Ca/P molar ratio of POCAs was ranged from 1.50 for POCA7 to 1.70 for POCA10, which was deeply affected by the pH value (Table 1).…”

Section: ¹1mentioning

confidence: 99%

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pH effect on the characteristics of mineralized self-assembled polymeric nanocomposites as controlled drug release carriers

Son

Kim

2015

J. Ceram. Soc. Japan

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The use of polymer/inorganic material composites as controlled drug delivery carriers can be promising in the future for the reason of their excellent mechanical properties, drug loading efficiency and controlled release behavior. To develop a controlled drug release carrier, mineralized self-assembled polymeric nanocomposites (POCA nanocomposites) containing caffeic acid (CA) were prepared simply in the presence of Pluronic F-68 and ¢-cyclodextrin (¢-CD) at different pH. The solution pH value greatly affected the morphological structure of nanocomposites. POCA7, POCA8 and POCA9 exhibited plate-shaped morphology, however, POCA10 showed only the sphere-like structure. The size of nanocomposites significantly decreased with increasing the solution pH value from 238 « 19 nm (POCA7) to 61 « 4 nm (POCA10). The amount of CA loaded on the nanocomposites was also considerably affected by the solution pH value. In addition, these nanocomposites exhibited slow, long-term and controlled release rate in DPBS, and the release rate of CA from the nanocomposites could be adjusted by varying the pH value of the release medium, implying that the POCA nanocomposites might be potentially applicable in controlled drug release systems.

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Section: ¹1mentioning

confidence: 57%

Section: Morphology Of Poca Nanocompositesmentioning

confidence: 99%

Section: Morphology Of Poca Nanocompositesmentioning

confidence: 99%

Section: ¹1mentioning

confidence: 99%

Section: ¹1mentioning

confidence: 99%

See 3 more Smart Citations

pH effect on the characteristics of mineralized self-assembled polymeric nanocomposites as controlled drug release carriers

Son

Kim

2015

J. Ceram. Soc. Japan

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Porous and spherical hydroxyapatite microcomposites for immunoglobulin G adsorption

Akkaya

2013

J of Applied Polymer Sci

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A novel porous and spherical hydroxyapatite (HA) microcomposite with an average diameter of 50-100 lm was produced by suspension polymerization for the adsorption of human immunoglobulin G (IgG). The specific surface area of the pure HA and HA microcomposite were found to be 80.25 and 182.53 m 2 /g, respectively. Characterizations were performed with X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, and scanning electron microscopy analysis. The swelling ratio of the spherical HA microcomposites was 170%. The maximum adsorption of IgG from aqueous solution was observed at pH 7.0 (5 mM phosphate buffer) and at 45 C in a batch system in which parallel separate experiments were performed independently. An IgG adsorption capacity value of up to 140 mg/g was obtained for the HA microcomposite. The IgG molecules could be repeatedly adsorbed and desorbed through the use of spherical microcomposites without a noticeable loss in the IgG adsorption capacity.

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One‐Pot Synthesis of Cyclodextrin‐Doped Cu‐SiO₂ Catalysts for Efficient Hydrogenation of Dimethyl Oxalate to Ethylene Glycol

Liu

et al. 2017

ChemCatChem

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The β‐cyclodextrin (β‐CD) was successfully applied to synthesize Cu‐SiO2 catalysts by the sol‐gel method. The first and most important question addressed was increasing the copper loading with higher dispersion in the silica support. Another task was to elucidate the structure–performance relationship. Furthermore, catalysts with various β‐CD doping levels were systematically characterized and employed in the hydrogenation of dimethyl oxalate (DMO) to ethylene glycol (EG). The 0.1CD‐Cu‐SiO2 catalyst with 17.39 wt % copper showed 99.9 % DMO conversion and the highest EG selectivity of 95.0 % at 210 °C, as well a lifetime of over 240 h. The reaction results disclosed that the catalytic performance could be tuned facilely by changing the amount of β‐CD doping, which effectively influenced the Cu metallic surface area and dispersion.

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Biomimetic synthesis of micrometer spherical hydroxyapatite with β-cyclodextrin as template

Cited by 43 publications

References 20 publications

pH effect on the characteristics of mineralized self-assembled polymeric nanocomposites as controlled drug release carriers

pH effect on the characteristics of mineralized self-assembled polymeric nanocomposites as controlled drug release carriers

Porous and spherical hydroxyapatite microcomposites for immunoglobulin G adsorption

One‐Pot Synthesis of Cyclodextrin‐Doped Cu‐SiO₂ Catalysts for Efficient Hydrogenation of Dimethyl Oxalate to Ethylene Glycol

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Biomimetic synthesis of micrometer spherical hydroxyapatite with β-cyclodextrin as template

Cited by 43 publications

References 20 publications

pH effect on the characteristics of mineralized self-assembled polymeric nanocomposites as controlled drug release carriers

pH effect on the characteristics of mineralized self-assembled polymeric nanocomposites as controlled drug release carriers

Porous and spherical hydroxyapatite microcomposites for immunoglobulin G adsorption

One‐Pot Synthesis of Cyclodextrin‐Doped Cu‐SiO2 Catalysts for Efficient Hydrogenation of Dimethyl Oxalate to Ethylene Glycol

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One‐Pot Synthesis of Cyclodextrin‐Doped Cu‐SiO₂ Catalysts for Efficient Hydrogenation of Dimethyl Oxalate to Ethylene Glycol