scholarly journals Preparation of Modified Montmorillonite—Plant Fiber Composite Foam Materials

Materials ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 420
Author(s):  
Qifeng Chen ◽  
Xinya Du ◽  
Guangxue Chen
Keyword(s):  
Fiber Composite ◽  
Wave Tube ◽  
Plant Fiber ◽  
Composite Foam ◽  
X Ray ◽  
Dimethyl Benzyl ◽  
Modified Montmorillonite ◽  
Organically Modified ◽  
Dimethyl Benzyl Ammonium ◽  
Standing Wave Tube

In the present study, plant fiber foam materials have significant differences in density compared to conventional plastic foam materials. In view of the current problems of fiber foam materials, the montmorillonite (MMT) organically modified by octadecyl-dimethyl-benzyl-ammonium chloride (ODBA) was added to the preparation of composite foam materials by optimizing the existing formula. The properties of organic montmorillonite (OMMT) and the prepared composite foam materials were characterized by scanning electron microscopy (SEM), X-ray diffractometry (XRD), and a standing wave tube sound absorption tester. The results showed that the pore size inside the plant fiber foam materials with the addition of OMMT was more uniform and arranged more closely and orderly. In addition, when the OMMT was added to 0.1 g, the density of the prepared OMMT-bagasse composite foam materials reached its lowest point of 0.079 g/cm3, which was shared with high foam materials.

Influence of Exchanged Surfactant on the Structure and Adsorption Properties of Brazilian Green Mud Clay

2012 ◽  
Vol 727-728 ◽  
pp. 1473-1478
Author(s):  
Mariaugusta Ferreira Mota ◽  
Fabricio Machado ◽  
Meiry Glaúcia Freire Rodrigues
Keyword(s):  
Ammonium Chloride ◽  
Basal Spacing ◽  
Natural Clay ◽  
X Ray Diffraction ◽  
Exchange Reactions ◽  
X Ray ◽  
Dimethyl Benzyl ◽  
Dimethyl Benzyl Ammonium ◽  
Green Clay

This work presents an experimental study focusing on the preparation and characterization of modified natural green clay-mud with quaternary ammonium salts of chloride and alkyl dimethyl benzyl ammonium chloride (Dodigen) and dimethyl stearyl ammonium chloride (Praepagen). X ray Diffraction (XRD), infrared spectroscopy (IR) and expansion tests (adsorption capacity and Foster swelling) measurements were performed in order to evaluate the performance of the ion exchange reactions and the degree of affinity with oil products. It is observed an increasing in the XRD basal spacing of the modified clays (1.96 nm and 2.25 nm for Praepagen and Dodigen salts, respectively) in comparison to the observed value (1.56 nm) for the natural clay. The IR results showed that salts were successfully incorporated to natural clay structure. Based on the expansion tests the organoclays presented the best efficiency independent on the kind of solvent used in comparison with the natural clay performance.

Organophilization of Four Differents Bentonitic Clays with a Quaternary Ammonium Salt

2005 ◽  
Vol 498-499 ◽  
pp. 67-72 ◽  
Author(s):  
Daniela de Lourdes A.C.S. Andrade ◽  
Wildemberg A. Freire ◽  
Sueila S. Araújo ◽  
Lucianna G.F. Vieira ◽  
Ana Cristina Figueiredo de Melo Costa ◽  
...  
Keyword(s):  
Polymer Nanocomposites ◽  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Drilling Fluids ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dimethyl Benzyl ◽  
Dimethyl Benzyl Ammonium ◽  
Petroleum Drilling

Organophilic Bentonities clays are widely used for industrial purposes, as components of petroleum drilling fluids as well as in cosmetics, lubricants adhesives and paints. Most recent they have been used as fillers in polymer nanocomposites. In this work, three organophilic bentonitic clays from the distric of Boa Vista and one from Campina Grande, PB, Brazil, were synthesized and characterized. The four clays were treated with a quaternary chloride ammonium salt- dimethyl benzyl ammonium alkyl chloride (Dodigen 1611) provided by Chemco. The cation exchange and swelling capacities of the modified clays were determined and the clays were characterized by FTIR, Thermal Analysis (DTA, TGA) and X-ray diffraction. The results showed the modification of all four clays by the quaternary ammonium salt to be successful.

Preparation, Physical and Mechanical Characterization of Montmorillonite/Polyethylene Nanocomposites

2006 ◽  
Vol 312 ◽  
pp. 205-210 ◽  
Author(s):  
V. Pettarin ◽  
Victor Jayme Roget Rodriguez Pita ◽  
Francisco Rolando Valenzuela-Díaz ◽  
S. Moschiar ◽  
L. Fasce ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Melt Blending ◽  
X Ray Diffraction ◽  
Clay Platelet ◽  
X Ray ◽  
Modified Montmorillonite ◽  
Organically Modified Montmorillonite ◽  
Organically Modified

In this paper, we report the preparation of polyethylene composites with organically modified montmorillonite. Three different Na+-montmorillonites were modified in order to obtain organoclays and two grades of high-density polyethylene were used as composite matrices. All composites were prepared by melt blending, and their physical and mechanical properties were thoroughly characterized. The extent of clay platelet exfoliation in the composites was confirmed by X-ray diffraction (XRD). Mechanical properties under static and impact conditions were evaluated to assess the influence of the reinforcement on the properties of polyethylene.

Effects of Surface Properties of Montmorillonite for their Cytocompatibility

2016 ◽  
Vol 696 ◽  
pp. 80-84 ◽  
Author(s):  
Ko Nakanishi ◽  
Shigeaki Abe ◽  
Shuichi Yamagata ◽  
Yasuhiro Yoshida ◽  
Junichiro Iida
Keyword(s):  
Coupling Reaction ◽  
Diffraction Peak ◽  
Carboxyl Group ◽  
X Ray Diffraction ◽  
X Ray ◽  
Modified Montmorillonite ◽  
Organically Modified Montmorillonite ◽  
Silane Coupling ◽  
Organically Modified ◽  
Size And Morphology

We modified the surface of organically modified montmorillonite (OMMT) with the carboxyl group using the silane coupling reaction and assessed its characteristics and cytocompatibility. Scanning electron microscope observations show that while the size and morphology of the obtained OMMT (OMMT-COOH) was unchanged, the surface of OMMT-COOH was coarser than that of OMMT. Fourier transform infrared spectra showed characteristic strong peaks at 1210 and 1630 cm−1, corresponding to the peaks of the carboxyl group. X-ray diffraction analysis showed that the diffraction peak of OMMT-COOH corresponding to the (001) reflection was located at higher a 2θ value than that of OMMT. Results of the proliferation ratio and cell viability measurements indicated that the OMMT-COOH cytocompatibility is higher than that of OMMT. Based on these results, we conclude that cytocompatibility of montmorillonite would be improved by tuning the properties of the surface.

Thermomechanical behavior of nanoclay filled TPU/PP blends

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
M. Kannan ◽  
S.S. Bhagawan ◽  
Kuruvilla Joseph ◽  
Sabu Thomas
Keyword(s):  
Hard Segment ◽  
Thermoplastic Polyurethane ◽  
Melt Blending ◽  
X Ray Diffraction ◽  
X Ray ◽  
Surface Modifier ◽  
Modified Montmorillonite ◽  
Organically Modified Montmorillonite ◽  
Organically Modified ◽  
Pp Blends

AbstractBoth ester- and ether- based thermoplastic polyurethane (TPU) nanocomposites were prepared by melt blending, using 3 wt % Cloisite 10A (organically modified montmorillonite clay) as the nanoscale reinforcement. The nanocomposites were subsequently melt-blended with polypropylene (PP) using maleic anhydride grafted polypropylene (MA-g-PP) as a compatibilizer (in the ratio of 70/30- TPU nano/PP, 70/25/5-TPU nano/PP/MA-g-PP). Besides giving substantial increase in modulus, tensile strength and other properties organoclay reinforcement functions as a surface modifier for TPU hard segment. X-ray diffraction studies revealed that compatibilization is further improved by introducing functionalized PP (MA-g-PP) in the organoclay containing blends. The blend system was evaluated by DSC, DMA, SEM, mechanical properties and Xray diffraction. The results indicate that the ester- TPU exhibited greater miscibility than ether-TPU. Abrasion resistance and water absorption were also better for compatibilised ester- TPU blends as compared to the ether-TPU materials.

Synthesis and properties of poly(4-vinylpyridine)/ montmorillonite nanocomposites

e-Polymers ◽  
2003 ◽  
Vol 3 (1) ◽  
Author(s):  
Sinan Sen ◽  
Nihan Nugay ◽  
Turgut Nugay
Keyword(s):  
Block Copolymer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Force Microscopy ◽  
Atomic Force ◽  
Modified Montmorillonite ◽  
Organically Modified Montmorillonite ◽  
Organically Modified ◽  
Organophilic Montmorillonite ◽  
Scanning Electron

Abstract 4-Vinylpyridine monomer was mixed with organically modified montmorillonite (MMT) and polymerized in the presence of 2,2’-azoisobutyronitrile as radical initiator. Organophilic montmorillonite was obtained by using a block copolymer of poly(methyl methacrylate) and quaternized poly(4-vinylpyridine) (P4VP) in different compositions. X-ray diffraction (XRD) and thermogravimetric analysis confirmed that the block copolymer is inserted between MMT layers while the interlayer distance is expanded. The P4VP nanocomposites obtained from the block copolymer with the longer P4VP block exhibited no XRD peak, suggesting an exfoliated structure. These composites showed increased storage modulus and thermal stability at a very low loading of 1 - 2 wt.-%, compared to neat P4VP. Scanning electron microscopy and atomic force microscopy analyses were also conducted for selected nanocomposites.

Self-Recognizing π-π Stacking Interactions Designed for the Generation of Ultrastable Mesoporous Hydrogen-Bonded Organic Frameworks

2019 ◽  
Author(s):  
KAIKAI MA ◽  
Peng Li ◽  
John Xin ◽  
Yongwei Chen ◽  
Zhijie Chen ◽  
...  
Keyword(s):  
Pore Size ◽  
Fiber Composite ◽  
Aqueous Media ◽  
Stacking Interactions ◽  
Mustard Gas ◽  
X Ray Diffraction ◽  
X Ray ◽  
Expansion Strategy ◽  
Π Stacking ◽  
Hydrogen Bonded

Creating crystalline porous materials with large pores is typically challenging due to undesired interpen-etration, staggered stacking, or weakened framework stability. Here, we report a pore size expansion strategy by self-recognizing π-π stacking interactions in a series of two-dimensional (2D) hydrogen–bonded organic frameworks (HOFs), HOF-10x (x=0,1,2), self-assembled from pyrene-based tectons with systematic elongation of π-conjugated molecular arms. This strategy successfully avoids interpene-tration or staggered stacking and expands the pore size of HOF materials to access mesoporous HOF-102, which features a surface area of ~ 2,500 m2/g and the largest pore volume (1.3 cm3/g) to date among all reported HOFs. More importantly, HOF-102 shows significantly enhanced thermal and chemical stability as evidenced by powder x-ray diffraction and N2 isotherms after treatments in chal-lenging conditions. Such stability enables the adsorption of dyes and cytochrome c from aqueous media by HOF-102 and affords a processible HOF-102/fiber composite for the efficient photochemical detox-ification of a mustard gas simulant.

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