Preparation and Research of Coupling Agent Modified Organophilic Montmorillonite

2013 ◽  
Vol 634-638 ◽  
pp. 2238-2241
Author(s):  
Xiao Hua Gu ◽  
Jia Liang Zhou ◽  
Xiao Sheng Li ◽  
Bao Yun Xu
Keyword(s):  
Thermal Stability ◽  
Coupling Agent ◽  
Interlayer Spacing ◽  
Coupling Agents ◽  
X Ray Diffraction ◽  
X Ray ◽  
Triphenyl Phosphonium ◽  
Ft Ir ◽  
Novel Method ◽  
Organophilic Montmorillonite

A novel method is proposed to modify montmorillonite with coupling agents and Hexadecyl triphenyl phosphonium bromide surfactants made by our group (named P-surfactant in the following). The structure of organophilic montmorillonite (OMMT) was investigated by FT-IR, XRD and TG. The FT-IR shows the coupling agents were inserted between the layers of MMT and reacted with –OH of MMT. The results of X-ray diffraction shows that the coupling agents were all intercalated into the layers of MMT. The interlayer spacing of montmorillonite increases to 4.00 nm, the effect of modification is well. The results of TG showed the thermal stability was better.

Preparation and Research of Anionic and Cationic Secondary Modified Organophilic Montmorillonite

2011 ◽  
Vol 396-398 ◽  
pp. 417-420 ◽  
Author(s):  
Xiao Hua Gu ◽  
Shi Wei Li ◽  
Bing Zheng ◽  
Jia Liang Zhou
Keyword(s):  
Cationic Surfactants ◽  
Anionic Surfactants ◽  
Interlayer Spacing ◽  
X Ray Diffraction ◽  
X Ray ◽  
Modification Effect ◽  
Novel Method ◽  
Organophilic Montmorillonite

A novel method is proposed to modify montmorillonite with anionic surfactants, cationic surfactants and halides stearyl cationic surfactants made by our group (Z-surfactant). The structure of organophilic montmorillonite (OMMT) was characterized by XRD and TG. The results of X-ray diffraction show that cationic surfactants and anionic surfactants are all intercalated into the layer of MMT. When modified with cationic surfactants, the interlayer spacing of MMT increases from 1.24 nm to the maximum of 3.76 nm. When it was secondary modified, the insertion order is to insert the cation first and then the anion. The interlayer spacing of montmorillonite increases to 4.80 nm, the modification effect is well.

The Characterization of Bovine Bone-Derived Hydroxyapatite Isolated Using Novel Non-Hazardous Method

2020 ◽  
Vol 45 ◽  
pp. 49-56
Author(s):  
Aniek Setiya Budiatin ◽  
Samirah ◽  
Maria Apriliani Gani ◽  
Wenny Putri Nilamsari ◽  
Chrismawan Ardianto ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Extraction Method ◽  
Bovine Bone ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir ◽  
Novel Method ◽  
Scanning Electron

Bovine bone is a considerable source for the production of hydroxyapatite. The recent study reported a novel method to extract hydroxyapatite from bovine bone without producing hazardous residue. The bovine bones were cut and boiled in the opened chamber followed by boiling in pressurized tank. The bones were then soaked into 95% ethanol. Calcination was then conducted in 800°C, 900°C and 1,000°C, for 2 hours. The result was then grinded and sieved. The powder then was characterized using Fourier transform infrared (FT-IR), Scanning electron microscopy (SEM) and X-ray diffraction analysis (XRD) to measure the purity of hydroxyapatite. It is concluded that the hydroxyapatite derived from this process showed 100% purity, resulting 35.34 ± 0.39% w/w from the wet bone weight and 72.3% w/w from the dried weight. The present extraction method has been proven to yield high amount of pure hydroxyapatite as well as reducing the use of hazardous reagent.

Preparation of Anion Modified Montmorillonite-Polystyrene Nanocomposite by Suspension Polymerization

2009 ◽  
Vol 87-88 ◽  
pp. 499-503
Author(s):  
Yi Wang ◽  
Hui Xia Feng ◽  
Jian Hui Qiu
Keyword(s):  
Thermal Stability ◽  
Anionic Surfactants ◽  
Suspension Polymerization ◽  
Layered Silicate ◽  
High Thermal Stability ◽  
X Ray Diffraction ◽  
X Ray ◽  
Modified Montmorillonite ◽  
Silicate Nanocomposites ◽  
Ft Ir

To ensure good compatibility between polymer and montmorillonite (MMT), three types organophilic-MMT were prepared and the influence of modifying agent style on the modification effect was studied. The results of X-ray diffraction(XRD) show that the modified reagents are all intercalated into the galleries of MMT, which are also proved by patterns of FT-IR and thermogravimetric analysis(TGA), and the spacing of MMT layers increases from 1.23 nm of the pristine MMT to 2.10nm, 3.52nm and 4.14nm for CTAB, SDS and DBS modified MMT respectively. The results also indicate that the d-spacing and exfoliation degree of anionic surfactants inserted MMT is bigger than that of the cationic surfactants treated MMT, which are usually used to preparation polymer layered silicate nanocomposites in literatures. So PS/SDS-MMT and PS/DBS-MMT nanocomposites were prepared by suspension polymerization. The structure of complex were characterized by XRD and no peak can be observed by the spectra, which suggest that the clay platelets have been exfoliated and dispersed in the PS matrix and the both complex are all have exfoliated structure. FT-IR spectrums analysis confirmed the existence of MMT which implied that the layers of silicate was distributing in composites. The results of TGA show that nanocomposites possess exceptionally high thermal stability and the DBS treated composite has higher thermal stability than that of SDS treated.

Preparation of Polyaniline/SiO2 Composites by Modified Silica Using Succinic Acid

2012 ◽  
Vol 535-537 ◽  
pp. 149-153 ◽  
Author(s):  
Er Yuan Li ◽  
Xiu Feng Wang ◽  
Xue Zhi Wang ◽  
Hao Wang
Keyword(s):  
Thermal Stability ◽  
Succinic Acid ◽  
X Ray Diffraction ◽  
Modified Silica ◽  
X Ray ◽  
Surface Character ◽  
Ft Ir ◽  
Thermal Stability Of ◽  
Scanning Electron ◽  
Ft Ir Spectroscopy

Polyaniline/SiO2 composites were prepared by the SiO2 particles whose surface character was modified by succinic acid. The composites were characterized by Fourier transform infrared (FT–IR) spectroscopy, X–ray diffraction (XRD), thermogravimetric analysis (TGA), scanning electron microscope (SEM). The results demonstrated that the thermal stability of PANI had improved.

Sonochemically Synthesis of Antimonite Nanoparticles and Its Influence on the Thermal Stability of the ABS Terpolymer

2013 ◽  
Vol 32 (4) ◽  
pp. 339-343 ◽  
Author(s):  
Siyamak Bagheriyan
Keyword(s):  
Thermal Stability ◽  
Acrylonitrile Butadiene Styrene ◽  
X Ray Diffraction ◽  
Limiting Oxygen Index ◽  
X Ray ◽  
Sonochemical Reaction ◽  
Ft Ir ◽  
Higher Temperature ◽  
Thermal Stability Of ◽  
Butadiene Styrene

AbstractSb2S3 nanoparticles were synthesized via a simple sonochemical reaction between SbCl3 and thioacetamide. The effect of different parameters such as power and time of pulsation on the morphology of the product has been investigated. The Sb2 S3 nanostructures were then added to acrylonitrile-butadiene-styrene terpolymer. The effect of Sb2 S3 nanostructures on the thermal stability of the polymeric matrix has been examined. The thermal decomposition of the nanocomposite shifts towards higher temperature in the presence of the Sb2 S3 . Nanostructures were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FT-IR), photoluminescence (PL) spectroscopy, thermogravimetric analysis (TGA), UL-94 and limiting oxygen index (LOI) analysis.

Preparation and Thermal Stability of Pyrrole and m-Toluidine Copolymer/Montmorillonite Composites

2014 ◽  
Vol 915-916 ◽  
pp. 780-783
Author(s):  
Hong Wang ◽  
Ming Tian Li ◽  
Yue Lu ◽  
Di Liu
Keyword(s):  
Thermal Stability ◽  
Interfacial Interaction ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Chemical Polymerization ◽  
X Ray ◽  
Ft Ir ◽  
Clay Layers ◽  
Thermal Stability Of

Pyrrole and m-toluidine copolymer (P(PY/MT)) / montmorillonite (MMT) Composites were prepared by in situ chemical polymerization of pyrrole with m-toluidine monomer in the presence of montmorillonite. The structural, morphological and thermal properties of these composites were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and differential scanning calorimetry (DSC). X-ray diffraction result for P(PY/MT)-MMT illuminated the intercalation of P(PY/MT) copolymer between the clay layers. The FT-IR result showed the successful incorporation of montmorillonite clay in the prepared P(PY/MT)/MMT composite. The higher thermal stability of high MMT content rate might be attributed to its higher chain compactness due to the interfacial interaction between the P(PY/MT) and the clay.

Synthesis and Characterization of Polyaniline Copolymer

2012 ◽  
Vol 217-219 ◽  
pp. 551-554
Author(s):  
Ting Xi Li ◽  
Yu Hua Zhao ◽  
Qian Li ◽  
Cheng Qian Yuan ◽  
Quan Liang Chen ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Infrared Spectroscopy ◽  
Thermogravimetric Analysis ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir ◽  
The Difference ◽  
Thermal Stability Of

Abstract. Polyaniline (PANI) and p-phenylenediamine (p-PDA)-aniline copolymer were prepared via a same microemulsion method. The structures of the PANI and p-PDA-aniline copolymer were characterized by infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis（TGA）. The results revealed the difference of synthesis and characterization between PANI and p-PDA-aniline copolymer. It was shown that structure of the copolymer is almost similar to that of PANI, but the p-PDA-aniline copolymer has a better crystallization than PANI, and the thermal stability of the copolymer is higher than that of pure PANI.

scholarly journals Vapochromism in Complexes of Stoichiometry [Au2Ag2R4L2]n

2009 ◽  
Vol 64 (11-12) ◽  
pp. 1500-1512 ◽  
Author(s):  
Eduardo J. Fernández ◽  
Antonio Laguna ◽  
José M. López-de-Luzuriaga ◽  
M. Elena Olmos ◽  
Raquel C. Puelles
Keyword(s):  
Thermal Stability ◽  
Thermogravimetric Analysis ◽  
Ir Spectroscopy ◽  
Gas Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Polymeric Chains ◽  
Ft Ir ◽  
Aurophilic Interactions ◽  
Ft Ir Spectroscopy

Reaction of [NBu4][Au(C6X5)2] (C6X5 = 3,5-C6Cl2F3, C6Cl5) with AgOClO3 in an Et2O/CH2Cl2 mixture affords [Au2Ag2(C6X5)4(OEt2)2]n [C6X5 = 3,5-C6Cl2F3 (1a), C6Cl5 (1b)]. These compounds react with tetrahydrofuran, acetone, acetonitrile or toluene in solution and in the gas phase (with toluene only in solution) to the new complexes [Au2Ag2(C6X5)4L2]n [L = THF (2a, 2b), (CH3)2CO (3a, 3b), CH3CN (4a, 4b), C7H8 (5a, 5b)]. The crystal structures of 2a and 5a have been determined by X-ray diffraction methods, showing polymeric chains formed by the union of tetranuclear Au2Ag2 units via aurophilic interactions. The thermal stability and the vapochromic behaviour of these complexes have been studied by thermogravimetric analysis (TGA), X-ray powder diffraction and FT-IR spectroscopy

Preparation and Property of Hydrophobic Modified Guar Gum Thickener

2013 ◽  
Vol 631-632 ◽  
pp. 260-264
Author(s):  
Ying Su ◽  
Yi Ding Shen ◽  
Xiao Juan Lai ◽  
Xiao Rong Wang
Keyword(s):  
Thermal Stability ◽  
Heat Resistance ◽  
Guar Gum ◽  
Suspension Polymerization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir ◽  
Polymerization Method ◽  
Long Chain ◽  
Better Than

The modified guar gum was synthesized with guar gum as material and bromododecane as etherifying agent by suspension polymerization method. The solution and gel of the modified guar gum were also prepared. The structure and the property of the modified guar gum were analysized by Fourier transform infrared spectrum (FT-IR), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). The heat resistance and the viscoelasticity modulus of the gel were also researched by rheometer. The results of FT-IR and XRD show that the hydrophobic long chain has been introduced into the guar gum successfully. TGA indicates that the modified guar gum has higher thermal stability. The rheology tests reflect that with different temperature conditions, the shear viscosity, the viscoelasticity modulus of the gel and the heat resistance of the modified guar gum are both better than that of the unmodified guar gum. The modified guar gum can be used as thickener of fracturing fluid, and it can reduce its amount.

Synthesis and Mechanical Properties of Advanced Polyimide/Silicon Dioxide Nanocomposites

2007 ◽  
Vol 561-565 ◽  
pp. 709-712 ◽  
Author(s):  
Qing Xin Zhang ◽  
Kimiyoshi Naito ◽  
Yutaka Kagawa
Keyword(s):  
Silicon Dioxide ◽  
Coupling Agent ◽  
Sol Gel ◽  
Sio2 Nanoparticles ◽  
X Ray Diffraction ◽  
Interatomic Distances ◽  
X Ray ◽  
Sol Gel Process ◽  
Ft Ir ◽  
Sio2 Nanocomposites

Hybrid inorganic-organic materials based on a polyimide (PI) and silicon dioxide (SiO2) were prepared previously only via sol-gel approach. However, sol-gel processes have some critical limitations. The primary drawback is that the resultant gel is extremely fragile and sol-gel process is complicated and costly. In this study, using SiO2 nanoparticles polyimide/SiO2 nanocomposites were synthesized from 4,4'-diaminodiphenyl ether (ODA) and 3,3',4,4'-benzophenonetetracarboxylic dianhydride (BTDA). A coupling agent, 3-glycidyloxyporpl trimethoxysilane (GTMOS), was used to functionalize the SiO2 nanoparticles which enhanced the compatibility between polyimide and SiO2 nanoparticles. The microstructures of polyimide/SiO2 nanocomposites were characterized by Fourier transform infrared spectroscopy (FT-IR) and wide angle X-ray diffraction (WAXD). All the polyimides show typical noncrystalline X-ray diffraction. The frequent occurrence of particular interatomic distances (R) denoted by the noncrystalline WAXD maxima were determined. All the modulus, strength and fracture strain of polyimide were improved with 5 wt% SiO2 modified with the coupling agent.

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