Controlled preparation of core–shell polystyrene/polypyrrole nanocomposite particles by a swelling–diffusion–interfacial polymerization method

TMAAM, a new dendrimer, was used to modify the conventional aromatic polyamide NF membrane via interfacial polymerization method, and the result TMAAM-based semi-aromatic polyamide NF membrane strong dye rejection, favourable antifouling property and good stability.

Download Full-text

Ultrasonic-Assisted Synthesis, Characterization, and Photocatalytic Application of SiO2@TiO2 Core-Shell Nanocomposite Particles

Journal of Nanomaterials ◽

10.1155/2019/6368789 ◽

2019 ◽

Vol 2019 ◽

pp. 1-11 ◽

Cited By ~ 3

Author(s):

Newaz Mohammed Bahadur ◽

Farhana Chowdhury ◽

Md. Obaidullah ◽

Md. Shahadat Hossain ◽

Rumana Rashid ◽

...

Keyword(s):

Zeta Potential ◽

Metal Oxide ◽

Uv Light ◽

Water Solution ◽

Ultrasound Irradiation ◽

Blue Dye ◽

Core Shell ◽

Nanocomposite Particles ◽

Ultrasonic Assisted ◽

Shell Particles

In this study, we report the synthesis of SiO2@TiO2 core-shell nanocomposite particles by ultrasound irradiation of a mixture of dispersed SiO2 nanoparticles, titanium-tetra-n-butoxide (TBOT), and ammonia in an ethanol-water solution medium. The resulting core-shell nanocomposite particles were characterized by SEM, TEM, FT-IR, XPS, XRF, zeta potential measurements, XRD, and UV-visible spectroscopy. Results showed that TiO2 nanoparticles coated on the surface of SiO2 were 6–10 nm in size and retained an anatase crystalline phase. Zeta potential measurements confirmed that the surface property of the SiO2 changed after TiO2 coating. SiO2@TiO2 core-shell particles demonstrated better decolorization of methylene blue dye compared to commercial TiO2 in aqueous solution under UV light. After treatment, the catalysts were separated with low-speed centrifugation and successfully reused four times without loss of activity. This study may provide some inspiration for the synthesis of other metal oxide-metal oxide core-shell nanocomposite materials through ultrasound irradiation.

Download Full-text

Porous Poly(1-naphthylamine) Synthesized by Interfacial Polymerization

Materials Science Forum ◽

10.4028/www.scientific.net/msf.809-810.319 ◽

2014 ◽

Vol 809-810 ◽

pp. 319-322

Author(s):

Zhen Zhong Hou ◽

Qing Hao Yang

Keyword(s):

Interfacial Polymerization ◽

Amorphous Polymer ◽

Molar Ratio ◽

Polymerization Temperature ◽

Main Mode ◽

Reaction Conditions ◽

Ft Ir ◽

Micro Morphology ◽

Polymerization Method ◽

Porous Poly

Porous poly (1-naphthylamine) were synthesized by interfacial polymerization method. The effects of several reaction conditions including oxidant/monomer molar ratio, polymerization temperature and reaction time on the polymerization yield have been investigated. The highest yield of poly (1-naphthylamine) was up to 73% at oxidant/monomer molar ratio of 3 and polymerization temperature of 25 °C for over 20h. Using FT-IR and XRD to analyze the structure of the obtained polymer, the results show that the main mode of connection for 1-naphthylamine units was linking N to para-C and it formed amorphous polymer with some ordered strutures. The micro-morphology of the polymer observed by SEM was found to have irregular porous structure with pore size less than 5μm, which may be related to the “self-emulsion effect” during polymerization.

Download Full-text

Microstructural and Magnetic Properties of Core-Shell Ni-Ce Nanocomposite Particles Assemblies

MRS Proceedings ◽

10.1557/proc-635-c6.8 ◽

2001 ◽

Vol 635 ◽

Author(s):

Xiang-Cheng Sun ◽

J. A. Toledo ◽

M. Jose Yacaman

Keyword(s):

Applied Field ◽

Magnetic Core ◽

Field Size ◽

Blocking Temperature ◽

Antiferromagnetic Order ◽

Core Shell ◽

Interparticle Interactions ◽

Nanocomposite Particles ◽

Diffraction Patterns ◽

Field Size Distribution

AbstractNovel magnetic core-shell Ni-Ce nanocomposite particles (15-50 nm) are presented. SEM observation indicates a strongly ferromagnetic interacting order with chain-like features among Ni-Ce nanocomposite particle assemblies. Typical HREM image demonstrates that many planar defects (i. e. stacking faults) exist in large Ni core zone (10-45 nm ); the innermost NiCe alloy and outermost NiO oxide exist in the thin shell layers ( 3-5 nm ). Nano-diffraction patterns show an indication of well-defined spots characteristic and confirm the nature of this core-shell nanocomposite particles. Superparamagnetic relaxation behavior above average blocking temperature (TB =170K) for Ni-Ce nanocomposite particles assemblies have been exhibited, this superparamagnetic behavior is found to be modified by interparticle interactions, which depending on the applied field; size distribution and coupling with the strong interparticle interaction. In addition, an antiferromagnetic order occurs with a Neél temperature TN of about 11K due to Ce ion magnetic order fuction. A spin-flop transition is also observed below TN at a certain applied field and low temperature.

Download Full-text

Synthesis of high latent heat lauric acid/silica microcapsules by interfacial polymerization method for thermal energy storage

Journal of Energy Storage ◽

10.1016/j.est.2020.102059 ◽

2021 ◽

Vol 33 ◽

pp. 102059

Author(s):

Xin Yang ◽

Yong Liu ◽

Zhonghao Lv ◽

Quanxian Hua ◽

Li Liu ◽

...

Keyword(s):

Energy Storage ◽

Latent Heat ◽

Thermal Energy ◽

Thermal Energy Storage ◽

Lauric Acid ◽

Interfacial Polymerization ◽

Polymerization Method ◽

High Latent Heat

Download Full-text

One-Step Synthesis and Antibacterial Properties of Polyaniline/TiO2 Nanocomposites

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.534.78 ◽

2012 ◽

Vol 534 ◽

pp. 78-81

Author(s):

Ting Wei Hu ◽

Shao Yun Shan ◽

Shi Mei Yang ◽

Li Hong Jiang ◽

Ya Ming Wang ◽

...

Keyword(s):

Escherichia Coli ◽

Staphylococcus Aureus ◽

Bacillus Subtilis ◽

Interfacial Polymerization ◽

Antibacterial Property ◽

Antibacterial Properties ◽

Molar Ratio ◽

Tetrabutyl Titanate ◽

One Step ◽

Polymerization Method

Polyaniline(PANI)/TiO2 nanocomposites are successful synthesized by one step-interfacial polymerization method. Morphologies and structures of the nanocomposites are characterized using SEM, FTIR, and XRD. The antibacterial properties of PANI/TiO2 nanocomposites on Staphylococcus aureus, Bacillus subtilis, Escherichia coli, Bacillus megateriu and Bacillus cereus are tested. The effect of molar ratio of aniline and tetrabutyl titanate on structures and antibacterial properties are also been explored. The results show that the content of tetrabutyl titanate has a obvious influence on structure and morphologies of the nanocomposites. PANI/TiO2 nanocomposites have antibacterial properties especially on Staphylococcus aureus and Escherichia coli, which shows a best antibacterial property when the molar ratio of aniline to tetrabutyl titanate is 3:2.

Download Full-text

Core-Shell Structured Fe3O4/PPy Microspheres with High Magnetization for Purification of Plasmid DNA

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.716.314 ◽

2013 ◽

Vol 716 ◽

pp. 314-319 ◽

Cited By ~ 1

Author(s):

Hai Hui Jiang ◽

Yan Zhou ◽

Xiao Yun Han ◽

Xin Cheng Chen ◽

Yun Hua Hou ◽

...

Keyword(s):

Escherichia Coli ◽

Drug Delivery ◽

Plasmid Dna ◽

Magnetic Particles ◽

Interfacial Polymerization ◽

Core Shell ◽

Magnetic Composite ◽

Amino Group ◽

High Quality ◽

E Coli

Amino group-functionalized magnetic particles have wide applications in enzyme immobilization, DNA extraction, drug delivery, water purification, catalysis, and sensor. In this paper, Fe3O4/PPy microspheres with a well-defined coreshell structure have been prepared through an interfacial polymerization approach without surfactant. The magnetic composite spheres were characterized with XRD, FTIR, SEM, TEM, and magnetometry techniques, and further tested as the adsorbent to isolate plasmid DNA from Escherichia coli (E. coli) DH5α cells. The magnetic separation yields high-quality plasmid DNA in satisfying productivity as compared to the conventional phenolchloroform extraction.

Download Full-text