Effect of cetyltrimethyl‐ammonium bromide on the properties of hydroxyapatite nanoparticles stabilized Pickering emulsion and its cured poly(L‐lactic acid) materials
| Autor: | Ai-juan Wang, Dong‐jie Liu, Luyang Miao, Yang Song, Hua Xue, Zhuo Zhu, Rong Liu |
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| Rok vydání: | 2021 |
| Předmět: |
Ammonium bromide
Materials science Surface Properties Scanning electron microscope Polyesters Biomedical Engineering Nanoparticle 02 engineering and technology 010402 general chemistry 01 natural sciences Biomaterials Contact angle chemistry.chemical_compound stomatognathic system Zeta potential Cetrimonium Water 021001 nanoscience & nanotechnology Microspheres Pickering emulsion 0104 chemical sciences Solvent Durapatite chemistry Chemical engineering Emulsion Solvents Nanoparticles Emulsions 0210 nano-technology Porosity |
| Zdroj: | Journal of Biomedical Materials Research Part B: Applied Biomaterials. 109:1552-1562 |
| ISSN: | 1552-4981 1552-4973 |
| Popis: | Hydroxyapatite (HAp) nanoparticles stabilized Pickering emulsions were prepared by dichloromethane (CH2 Cl2 ) dissolved poly(L-lactic acid) (PLLA) as the oil phase and the deionized water with different concentrations of cetyltrimethyl-ammonium bromide (CTAB) as the aqueous phase. Effect of CTAB concentration on emulsions type and stability were studied. The emulsion type underwent a two-phase inversion, and emulsion stability increased first and then decreased with increasing CTAB concentrations. Besides, effect of CTAB concentration on zeta potential, aggregate size, contact angle of HAp nanoparticles and the oil-water interfacial tension were studied. The results indicated that zeta potential value of HAp nanoparticles changed from negative to positive, and the contact angle increased to over 80° initially and then decreased to below 40° rapidly. The distribution of HAp nanoparticles on the surface of emulsion droplets with different concentrations of CTAB (5 and 20 mM) was characterized using laser-induced confocal microscope. It revealed the distribution of HAp nanoparticles changed with different CTAB concentrations. The cured PLLA materials were obtained after the solvent being volatilized using as-received emulsions as templates. Scanning electron microscope images showed both microspheres and porous materials with interconnected pore structure were obtained. In conclusion, the microstructure of microspheres or porous PLLA materials is controllable by adjusting the property of HAp nanoparticles stabilized Pickering emulsions with appropriate amount of CTAB. |
| Databáze: | OpenAIRE |
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