scholarly journals Physical and Thermal Characterization of Alkali Treated Rice Husk Reinforced Polypropylene Composites

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Ismat Zerin Luna ◽  
Krishna Chandra Dam ◽  
A. M. Sarwaruddin Chowdhury ◽  
Md. Abdul Gafur ◽  
Nuruzzaman Khan ◽  
...  
Keyword(s):  
Rice Husk ◽  
Sodium Hydroxide Solution ◽  
Thermal Characterization ◽  
Sem Analysis ◽  
Morphological Properties ◽  
Electron Microscopic ◽  
Polypropylene Composites ◽  
The Matrix ◽  
The Fourier Transform

Rice husk (RH) reinforced polypropylene- (PP-) based composites were prepared by compression molding. The RH was treated with sodium hydroxide solution (1 wt%); then composites were prepared using varying percentages of RH (5 to 20 wt%). The thermomechanical, spectroscopic, and morphological properties of the prepared composites (RH-PP) were investigated. The scanning electron microscopic (SEM) analysis showed better interfacial adhesion between alkali treated RH and the matrix PP. The Fourier Transform Infrared (FTIR) spectra confirmed the chemical bonding.The results revealed that physical properties as well as thermal stability of the composites improved significantly with the addition of alkali treated RH in PP matrix.

Thermal Characterization of Polyurethane from Castor Oil Reinforced Sugarcane Straw Composites

2011 ◽  
Vol 415-417 ◽  
pp. 1103-1106
Author(s):  
Patricia Câmara Miléo ◽  
George Jackson de Moraes Rocha ◽  
Adilson Roberto Gonçalves
Keyword(s):  
Castor Oil ◽  
Thermal Characterization ◽  
Natural Fibre ◽  
Cellulose Fibres ◽  
Sugarcane Straw ◽  
The Matrix ◽  
One Step ◽  
Polyurethane Composites ◽  
Environmental Interests

The development in the area of natural-fibre-reinforced composites has greatly increased in recent years. Using castor oil polyurethane (PU) as matrix for composites reinforced with lignin and cellulose from sugarcane straw is in tune with economical and environmental interests. The aim of this work was the thermal degradation study of castor oil-polyurethane composites reinforced with cellulose from sugarcane straw. For the obtainment of cellulose, sugarcane straw was pretreated by steam explosion, followed by a delignification with NaOH. For the production of the PU, the polyol (castor oil) to diisocyanate mass ratio was 1.5:1.0. Reinforcement of the matrix was done changing the concentration of cellulose fibres (5,10,15,20% w/w). Thermogravimetric analysis of the materials was carried out. The results obtained showed that the process of decomposition of the matrix occurs in one step, while for the composites it occurs in two steps. The addition of reinforcement in the matrix basically did not change the thermal stability of the composite.

Thermal and dynamic-mechanical characterization of rice-husk filled polypropylene composites

2009 ◽  
Vol 17 (1) ◽  
pp. 8-13 ◽  
Author(s):  
Simone M. L. Rosa ◽  
Sônia M. B. Nachtigall ◽  
Carlos A. Ferreira
Keyword(s):  
Rice Husk ◽  
Mechanical Characterization ◽  
Polypropylene Composites ◽  
Dynamic Mechanical

Description of 3D Microstructure of the Composites with Polypropylene (PP) Matrix and Tuf Particles Fillers

2013 ◽  
Vol 197 ◽  
pp. 186-191 ◽  
Author(s):  
Aneta Gądek-Moszczak ◽  
Sabina Żmudka
Keyword(s):  
Mechanical Properties ◽  
Volcanic Ash ◽  
Morphological Characterization ◽  
Qualitative And Quantitative Analysis ◽  
3D Images ◽  
Polypropylene Composites ◽  
Qualitative And Quantitative ◽  
The Matrix ◽  
Working Out

The main goal of the study was working out the method of qualitative and quantitative analysis of the microstructure on 3D images of the polypropylene composites with Tuf (type of rock consisting volcanic ash) particles. Three types of composite were analyzed: with 10, 15 and 25% of Tuf. The standard morphological parameters were indicated that describes size, shape, and distribution of Tuf particles in the matrix. The morphological characterization of examined microstructure was compared with mechanical properties. The optimal from the point of mechanical properties composition of this composite were proposed.

scholarly journals Characterization ofH3PO4-Treated Rice Husk Adsorbent and Adsorption of Copper(II) from Aqueous Solution

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Ying Zhang ◽  
Ru Zheng ◽  
Jiaying Zhao ◽  
Fang Ma ◽  
Yingchao Zhang ◽  
...  
Keyword(s):  
Rice Husk ◽  
Morphological Characteristics ◽  
Sem Analysis ◽  
Electron Microscopic ◽  
Sorption Ability ◽  
Maximum Sorption ◽  
Equilibrium Data ◽  
Pseudo Second Order ◽  
Ft Ir ◽  
Agricultural Byproduct

Rice husk, a surplus agricultural byproduct, was applied to the sorption of copper from aqueous solutions. Chemical modifications by treating rice husk with H3PO4increased the sorption ability of rice husk for Cu(II). This work investigated the sorption characteristics for Cu(II) and examined the optimum conditions of the sorption processes. The elemental compositions of native rice husk and H3PO4-treated rice husk were determined by X-ray fluorescence (XRF) analysis. The scanning electron microscopic (SEM) analysis was carried out for structural and morphological characteristics of H3PO4-treated rice husk. The surface functional groups (i.e., carbonyl, carboxyl, and hydroxyl) of adsorbent were examined by Fourier Transform Infrared Technique (FT-IR) and contributed to the adsorption for Cu(II). Adsorption isotherm experiments were carried out at room temperature and the data obtained from batch studies fitted well with the Langmuir and Freundlich models withR2of 0.999 and 0.9303, respectively. The maximum sorption amount was 17.0358 mg/g at a dosage of 2 g/L after 180 min. The results showed that optimum pH was attained at pH 4.0. The equilibrium data was well represented by the pseudo-second-order kinetics. The percentage removal for Cu(II) approached equilibrium at 180 min with 88.9% removal.

Mechanical and Thermal Characterization of Jute Fabric-Reinforced Polypropylene Composites: Effect of Maleic Anhydride

2020 ◽  
pp. 1-13
Author(s):  
Olivia Helena Margoto ◽  
Karen De Souza Do Prado ◽  
Ricardo Coser Mergulhão ◽  
Virgínia Aparecida Da Silva Moris ◽  
Jane Maria Faulstich de Paiva
Keyword(s):  
Maleic Anhydride ◽  
Thermal Characterization ◽  
Polypropylene Composites ◽  
Jute Fabric

scholarly journals Polystyrene Nanocomposites Reinforced with Novel Dumbbell-Shaped Phenyl-POSSs: Synthesis and Thermal Characterization

Polymers ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1475 ◽  
Author(s):  
Abate ◽  
Bottino ◽  
Cicala ◽  
Chiacchio ◽  
Ognibene ◽  
...  
Keyword(s):  
In Situ Polymerization ◽  
Thermal Characterization ◽  
Sem Analysis ◽  
Morphological Properties ◽  
Polyhedral Oligomeric Silsesquioxanes ◽  
Scanning Calorimetry ◽  
Filler Reinforcement ◽  
Aromatic Bridge ◽  
Very High

Two series of novel dumbbell-shaped polyhedral oligomeric silsesquioxanes (POSSs), fully functionalized with phenyl groups at the corner of the silicon cages, were used to prepare polystyrene (PS) nanocomposites through the method of in situ polymerization. The percentage of the molecular filler reinforcement was set as 5% w/w of POSS and was checked by 1H-NMR spectroscopy. The obtained nanocomposites were characterized by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). Thermal and morphological properties were evaluated and compared among the nanocomposites obtained using the two different series of dumbbell-shaped POSSs and with the net PS. The thermal parameters for the prepared nanocomposites were very high when compared with those of neat PS, and they evidenced significant differences when an aliphatic or aromatic bridge was used to link the silicon cages. SEM analysis results allow us to hypothesize a justification for the different resistance to thermal degradation showed by the two series of molecular reinforcement.

Mechanical and thermal characterization of as-received recycled polyethylene filled with rice husk and their relationship to the end use of these composites

2020 ◽  
Vol 59 (13) ◽  
pp. 1463-1472
Author(s):  
James G. Kohl ◽  
Andrew G. Kohl ◽  
Angel Licea-Claverie ◽  
Arturo Zizumbo-Lopez ◽  
Randika Jayasinghe ◽  
...  
Keyword(s):  
Rice Husk ◽  
Thermal Characterization ◽  
Recycled Polyethylene ◽  
End Use

Microstructural and Thermal Characterization of Copper Based Composites for Thermal Management in Electronic Packaging

2014 ◽  
Vol 976 ◽  
pp. 148-153 ◽  
Author(s):  
Carlos Alberto León ◽  
Gabriel Rodríguez-Ortiz ◽  
E.A. Aguilar-Reyes ◽  
Makoto Nanko ◽  
M. Takeda
Keyword(s):  
Electronic Packaging ◽  
Coefficient Of Thermal Expansion ◽  
Thermal Characterization ◽  
Electroless Copper Plating ◽  
Pulsed Electric Current ◽  
Alumina Particles ◽  
The Matrix ◽  
Materials Used ◽  
Thermo Physical Properties

Copper based composites with 30, 40, 50 and 60 vol.% Al2O3 were fabricated by powder metallurgy and consolidated by pulsed electric current sintering (PECS). For the purpose of determining the advantage of using coated fillers, composite alumina particles with 18 vol.% copper were prepared by electroless copper plating. Coatings were continuous and homogeneous through alumina surface. Thus, composites consolidated by the modified process increased contact between the matrix and filler, which resulted in superior thermo-physical properties. Thermal conductivities of 210-99 and 227-114 W/mK were obtained for Cu/Al2O3 made by the admixture and the coated filler method, respectively. Such superiority is mainly attributed to the continuity in the matrix phase; the thermal conductivity values observed are similar to those shown by the traditional materials used in electronic packaging. The coefficient of thermal expansion was slight lower in composites fabricated by the coated filler method; values in the ranges of 14-11 and 13-10.5 μm/m°C were obtained for the admixture and the coated filler method, respectively.

scholarly journals Fabrication and Characterization of Sulfonated Graphene Oxide-Doped Polymeric Membranes with Improved Anti-Biofouling Behavior

Membranes ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 563
Author(s):  
Muhammad Zahid ◽  
Anum Rashid ◽  
Saba Akram ◽  
H. M. Fayzan Shakir ◽  
Zulfiqar Ahmad Rehan ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Graphene Oxide ◽  
Membrane Surface ◽  
Sem Analysis ◽  
Polymeric Membranes ◽  
Morphological Properties ◽  
Inversion Method ◽  
Sulfonated Graphene ◽  
Phase Inversion Method

In this study, cellulose acetate (CA) was blended with sulfonated graphene oxide (SGO) nanomaterials to endow a nanocomposite membrane for wastewater treatment with improved hydrophilicity and anti-biofouling behavior. The phase inversion method was employed for membrane fabrication using tetrahydrofuran (THF) as the solvent. The characteristics of CA-SGO-doped membranes were investigated through thermal analysis, contact angle, SEM, FTIR, and anti-biofouling property. Results indicated that anti-biofouling property and hydrophilicity of CA-SGO nanocomposite membranes were enhanced with addition of hydrophilic SGO nanomaterials in comparison to pristine CA membrane. FTIR analysis confirmed the successful decoration of SGO groups on CA membrane surface while revealing its morphological properties through SEM analysis. Thermal analysis performed using DSC confirmed the increase in thermal stability of CA-SGO membranes with addition of SGO content than pure CA membrane.

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