scholarly journals Synthesis and Characterization of Layered-Double Hydroxide 3-(4-Hydroxyphenyl) Propionate Nanocomposite

Nano Hybrids ◽  
2014 ◽  
Vol 7 ◽  
pp. 53-67 ◽  
Author(s):  
Ahmad Siti Nurasikin ◽  
Hashim Norhayati ◽  
Nur Hidayah Yusri ◽  
Illyas Md Isa ◽  
Azlan Kamari ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Layered Double Hydroxide ◽  
Ftir Spectra ◽  
Basal Spacing ◽  
Exchange Method ◽  
X Ray ◽  
Ion Exchange Method ◽  
Double Hydroxide ◽  
Thermal Stability Of

A new layered-double hydroxide-3-(4-hydroxyphenyl) propionate (LDH-HPP) has been synthesized by intercalation of 3-(4-hydroxyphenyl) propionic acid (HPP) into Zn-Al-layered double hydroxide (LDH) by ion-exchange method. PXRD, FTIR, TGA/DTG, compositional studies and FESEM were used to characterize the synthesized nanocomposite. The intercalation of HPP into the interlayer gallery space of LDH was characterized by x-ray diffractogram showed expanded basal spacing of the value of 17.1 Å. The FTIR spectra of LDH-HPP nanocomposite synthesis by 0.025M HPP resembled a mixture of both FTIR spectra of HPP and LDH. Thermal analysis of LDH-HPP nanocomposite shows a better thermal stability as compared to the pure HPP, which proved that the intercalation of HPP into LDH interlayer enhanced the thermal stability of the HPP.

Synthesis and Characterization of Layered Double Hydroxide-3-(4-Methoxyphenyl) Propionate Nanocomposite

Nano Hybrids ◽  
2014 ◽  
Vol 8 ◽  
pp. 39-56 ◽  
Author(s):  
Zuhailimuna Muda ◽  
Norhayati Hashim ◽  
Nur Hidayah Yusri ◽  
Illyas Md Isa ◽  
Azlan Kamari ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Thermal Analysis ◽  
Layered Double Hydroxide ◽  
Synthesis And Characterization ◽  
Basal Spacing ◽  
Exchange Method ◽  
Ion Exchange Method ◽  
Double Hydroxide ◽  
Thermal Stability Of

Zn/Al layered double hydroxide (LDH) intercalated by an anionic phenoxyherbicide guest, 3-(4-methoxypheny) propionate (MPP) were prepared by ion-exchange method. Power XRD and FTIR shows that the MPP phenoxyherbicide were successfully intercalated into the LDH interlayer. The basal spacing for Zn/Al layered double hydroxide-3-(4-methoxyphenyl) propionate nanocomposite (LDH-MPP) was 18.7 Å - 20.5 Å for 0.015 M, 0.025 M, and 0.050 M of MPP, respectively. Thermal analysis shows that the thermal stability of MPP was improved by the intercalation into the LDH interlayer. The results were also supported by elemental analysis and the surface morphology of this nanocomposite.

Synthesis of CoAl-layered double hydroxide/graphene oxide nanohybrid and its reinforcing effect in phenolic foams

2017 ◽  
Vol 30 (6) ◽  
pp. 688-698 ◽  
Author(s):  
Zhengzhou Wang ◽  
Xiaoyan Li
Keyword(s):  
Thermal Stability ◽  
Graphene Oxide ◽  
Layered Double Hydroxide ◽  
Photoelectron Spectroscopy ◽  
Limiting Oxygen Index ◽  
X Ray ◽  
Cone Calorimeter Test ◽  
Compressive And Flexural Strengths ◽  
Double Hydroxide ◽  
Thermal Stability Of

A graphene oxide (GO) immobilized with layered double hydroxide (CoAl-LDH/GO) nanohybrid was prepared via a hydrothermal method and characterized by transmission electron microscopy, field emission scan electronic microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and thermogravimetric analysis (TGA). The TGA results show that the immobilization of CoAl-LDH nanoparticles on GO surface greatly promotes the thermal stability of GO. More importantly, the incorporation of the CoAl-LDH/GO nanohybrid into PF foams leads to not only a great improvement in their mechanical strengths but also a reduction in their brittleness and friability. Specifically, compared to neat phenolic (PF) foam, at only 0.9 phr (parts per hundred of resin by mass) of CoAl-LDH/GO, the compressive and flexural strengths of the modified PF foam increase by 54.8% and 35.2%, respectively, and pulverization ratio decreases by 55.2%. The addition of the CoAl-LDH/GO nanohybrid also results in an increase in the limiting oxygen index and a decrease in the peak heat release of the modified PF foam in cone calorimeter test. Moreover, the thermal stability of the PF foam is enhanced by the addition of the nanohybrid.

Formation of Zinc-Aluminium Layered Double Hydroxide-2,4,5-Tricholorophenoxybutyrate Nanocomposites by Ion Exchange Method

2013 ◽  
Vol 832 ◽  
pp. 374-378
Author(s):  
Sheikh Ahmad Izaddin Sheikh Mohd Ghazali ◽  
Mohd Zobir Hussein ◽  
Ri Hanum Yahaya Subhan ◽  
Siti Halimah Sarijo
Keyword(s):  
Ion Exchange ◽  
Surface Area ◽  
Layered Double Hydroxide ◽  
Nitrogen Adsorption ◽  
Basal Spacing ◽  
Exchange Method ◽  
Type Iv ◽  
Ion Exchange Method ◽  
Double Hydroxide ◽  
Adsorption Desorption

The intercalation of herbicide, 2,4,5-tricholorophenoxybutyrate (TBA) , into zinc-aluminium-layered double hydroxide (ZAL) for the formation of a new nanocomposite ZAT, was accomplished via anion exchange method. Due to the intercalation of TBA with ZAL interlayer domain, basal spacing expanded from 8.9Å in the ZAL to 23.3 Å in the ZAT. The percentage loading of TBA in the ZAT is 45.5 % (w/w). The FTIR spectra of the nanocomposite shows resemblance peaks of the TBA and Zn-Al-layered double hydroxide indicating the inclusion of TBA into the layered double hydroxide. Surface area of the resulting nanocomposite increased from 1.3 to 15.6 m2g-1with the nitrogen adsorption-desorption of type IV, indicating the mesopore type of material.

Physicochemical Characterization of the Magnetic Fe3O4/MO-Intercalated-Layered Double Hydroxide Composite

2013 ◽  
Vol 734-737 ◽  
pp. 2168-2171
Author(s):  
Dan Chen ◽  
Xiao Long Ma ◽  
Yang Li
Keyword(s):  
Layered Double Hydroxide ◽  
Physicochemical Characterization ◽  
Basal Spacing ◽  
X Ray Diffraction ◽  
Exchange Method ◽  
Microwave Hydrothermal ◽  
Ft Ir ◽  
Double Hydroxide ◽  
Ft Ir Spectroscopy

A new magnetic Fe3O4/MO-intercalated-LDH composite has been synthesized by combination of Fe3O4, layered double hydroxide (LDH) and methyl orange (MO). Fe3O4/Zn2CrLDH and Fe3O4/MO-intercalated-LDH were obtained via two-step microwave hydrothermal and anion exchange method. X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy and vibrating sample magnetometer (VSM) were conducted to characterize the as-prepared samples. The latter exhibited that basal spacing of Zn2Cr-LDH is 1.18 nm. The value of saturation magnetization (Ms) is 20.5 emu/g. In addition, the amounts of adsorbed MO reached 1.54 mmol/g. Therefore, the material shows several advantages for the removal of pollutants.

Characterization of PET-Silver Nanocomposite Filaments

2018 ◽  
Vol 930 ◽  
pp. 224-229
Author(s):  
Marcos Antônio Guerra ◽  
Jeferson Prado Swerts ◽  
Mei Abe Funcia ◽  
Neide Aparecida Mariano ◽  
Maria Gabriela Nogueira Campos
Keyword(s):  
Electron Microscopy ◽  
Thermal Stability ◽  
Scanning Electron Microscopy ◽  
Silver Nanoparticles ◽  
Addition Method ◽  
X Ray ◽  
Silver Nanocomposite ◽  
Thermal Stability Of ◽  
Scanning Electron

Polyethylene terephthalate (PET) fiber is a very versatile fiber that can be produced with different properties, such as antimicrobial activity. This study aims to synthesize antimicrobial PET filaments incorporated with silver nanoparticles immobilized in silica (NPAg-Si) by bulk additive method. Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray (EDX) characterized the obtained filaments at concentrations (w/w) of 0.008%, 0.016%, 0.032%, 0.047% and 0.063% NPAg-Si, in order to identify the nanoparticles and analyze their dispersion in the polymeric matrix. Moreover, thermogravimetric analysis (TGA) was carry out to confirm the presence and concentration of the silver nanoparticles in the filaments as well as the thermal stability of the nanocomposites. The bulk addition method was efficient to produce PET-Silver filaments with silver nanoparticles homogeneously dispersed in the PET matrix.

In Situ Polymerization and Characterization of Poly(ε-caprolactone)/Layered Double Hydroxide Nanocomposites

2012 ◽  
Vol 557-559 ◽  
pp. 371-374
Author(s):  
Lian Liu ◽  
Teng Yu ◽  
Pei Wang ◽  
Guang Shuo Wang
Keyword(s):  
Layered Double Hydroxide ◽  
In Situ Polymerization ◽  
X Ray Diffraction ◽  
Visible Spectroscopy ◽  
X Ray ◽  
Uv Visible ◽  
Absorbance Peak ◽  
Double Hydroxide

Nanocomposites of poly(ε-caprolactone) (PCL) and layered double hydroxide (LDH) were prepared by in situ polymerization at low LDHs loadings in this work. The resultants were characterized by FTIR spectroscopy, X-ray diffraction (XRD), differential scanning calorimeter (DSC) and UV-visible spectroscopy (UV-vis). FTIR showed that the PCL/LDHs nanocomposites were prepared successfully by in situ polymerization and XRD spectra showed that the crystal structure did not change greatly in the presence of LDHS. DSC results confirmed that LDHs could act as nucleating agents. UV-vis spectra showed that LDHs had stronger absorbance peak than LDH. Moreover, the PCL/LDHs nanocomposites had strong anti-ultraviolet effect by introduction of LDHs into polymer matrix.

Influence of anionic surface modifiers on the thermal stability and mechanical properties of layered double hydroxide/polypropylene nanocomposites

2015 ◽  
Vol 3 (45) ◽  
pp. 22730-22738 ◽  
Author(s):  
Jae-Hun Yang ◽  
Wei Zhang ◽  
Hyunju Ryu ◽  
Ji-Hee Lee ◽  
Dae-Hwan Park ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Layered Double Hydroxide ◽  
Organic Modifier ◽  
Surface Modifiers ◽  
Polypropylene Nanocomposites ◽  
Loading Amount ◽  
Double Hydroxide ◽  
Thermal Stability Of ◽  
Anionic Surface

The thermal stability of PP was significantly improved after the formation of PP nanocomposites with organo-LDH, which was affected by the type of organic modifier in organo-LDH and the loading amount of organo-LDH.

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