Viscose fiber/polyamide 12 composites: Novel gas-phase method for the modification of cellulose fibers with an aminosilane coupling agent

2006 ◽  
Vol 102 (5) ◽  
pp. 4478-4483 ◽  
Author(s):  
T. Paunikallio ◽  
M. Suvanto ◽  
T. T. Pakkanen
Keyword(s):  
Gas Phase ◽  
Coupling Agent ◽  
Cellulose Fibers ◽  
Viscose Fiber ◽  
Phase Method ◽  
Polyamide 12

Photo-oxidation of phenylazonaphthol dyes and their reactivity analysis in the gas phase and adsorbed on cellulose fibers states using DFT and TD-DFT

2011 ◽  
Vol 89 (1) ◽  
pp. 16-22 ◽  
Author(s):  
Farzaneh Zanjanchi ◽  
Nasser L. Hadipour ◽  
Hassan Sabzyan ◽  
Javad Beheshtian
Keyword(s):  
Gas Phase ◽  
Cellulose Fibers ◽  
Photo Oxidation ◽  
Td Dft

Deposition of Coatings Based on Boron Carbide by the Gas-Phase Method

2019 ◽  
Vol 55 (2) ◽  
pp. 201-204
Author(s):  
O. Yu. Zhuravl’ov ◽  
O. V. Shyyan ◽  
M. O. Semenov ◽  
S. V. Strygunovs’kyi ◽  
V. V. Levenets’ ◽  
...  
Keyword(s):  
Boron Carbide ◽  
Gas Phase ◽  
Phase Method

Thermodynamic Analysis of a New Gas-Phase Method of Obtaining High-Purity Aluminum Nitride

2015 ◽  
Vol 56 (1) ◽  
pp. 97-102
Author(s):  
R. A. Shishkin ◽  
A. A. Elagin ◽  
A. R. Beketov ◽  
M. V. Baranov
Keyword(s):  
Aluminum Nitride ◽  
Gas Phase ◽  
Thermodynamic Analysis ◽  
High Purity ◽  
Phase Method ◽  
High Purity Aluminum

Mechanical and dynamic mechanical properties of polystyrene composites reinforced with cellulose fibers

2015 ◽  
Vol 30 (9) ◽  
pp. 1242-1254 ◽  
Author(s):  
Matheus Poletto ◽  
Ademir J Zattera
Keyword(s):  
Mechanical Properties ◽  
Coupling Agent ◽  
Interfacial Adhesion ◽  
Cellulose Fiber ◽  
Cellulose Fibers ◽  
Dynamic Mechanical Properties ◽  
Filler Loading ◽  
Fixed Amount ◽  
Dynamic Mechanical ◽  
Damping Peak

The mechanical and dynamic mechanical properties of cellulose fibers-reinforced polystyrene composites were investigated as a function of cellulose fiber content and coupling agent effect. The composites were prepared using a corotating twin-screw extruder and after injection molding. Three levels of filler loading (10, 20, and 30 wt%) and a fixed amount of coupling agent (2 wt%) were used. The results showed that a cellulose fiber loading of more than 20 wt% caused decrease in the mechanical properties. The addition of coupling agent substantially improves the mechanical and dynamic mechanical properties. The use of coupling agent improved the storage modulus and reduced the damping peak values of the composites due to the improved interfacial adhesion. The height of the damping peak was found to be dependent on the content of cellulose fiber and the interfacial adhesion between fiber and matrix. The adhesion factor values confirm that the better adhesion occurs when coupling agent is used.

Numerical Study of Coal Gasification Using Eulerian-Eulerian Multiphase Model

2007 ◽  
Author(s):  
Shaoping Shi ◽  
Christopher Guenther ◽  
Stefano Orsino
Keyword(s):  
Gas Phase ◽  
Large Scale ◽  
Coal Gasification ◽  
Solid Phase ◽  
Numerical Study ◽  
Three Dimensional ◽  
Phase Method ◽  
Multiphase Model ◽  
Measured Temperature ◽  
Entrained Flow

Gasification converts the carbon-containing material into a synthesis gas (syngas) which can be used as a fuel to generate electricity or used as a basic chemical building block for a large number of uses in the petrochemical and refining industries. Based on the mode of conveyance of the fuel and the gasifying medium, gasification can be classified into fixed or moving bed, fluidized bed, and entrained flow reactors. Entrained flow gasifiers normally feature dilute flow with small particle size and can be successfully modeled with the Discrete Phase Method (DPM). For the other types, the Eulerian-Eulerian (E-E) or the so called two-fluid multiphase model is a more appropriate approach. The E-E model treats the solid phase as a distinct interpenetrating granular “fluid” and it is the most general-purposed multi-fluid model. This approach provides transient, three-dimensional, detailed information inside the reactor which would otherwise be unobtainable through experiments due to the large scale, high pressure and/or temperature. In this paper, a transient, three-dimensional model of the Power Systems Development Facility (PSDF) transport gasifier will be presented to illustrate how Computational Fluid Dynamics (CFD) can be used for large-scale complicated geometry with detailed physics and chemistry. In the model, eleven species are included in the gas phase while four pseudo-species are assumed in the solid phase. A total of sixteen reactions, both homogeneous (involving only gas phase species) and heterogeneous (involving species in both gas and solid phases), are used to model the coal gasification chemistry. Computational results have been validated against PSDF experimental data from lignite to bituminous coals under both air and oxygen blown conditions. The PSDF gasifier geometry was meshed with about 70,000, hexahedra-dominated cells. A total of six cases with different coal, feed gas, and/or operation conditions have been performed. The predicted and measured temperature profiles along the gasifier and gas compositions at the outlet agreed fairly well.

scholarly journals Using Factorial Design Methodology to Assess PLA-g-Ma and Henequen Microfibrillated Cellulose Content on the Mechanical Properties of Poly(lactic acid) Composites

2017 ◽  
Vol 2017 ◽  
pp. 1-14 ◽  
Author(s):  
M. Dzul-Cervantes ◽  
P. J. Herrera-Franco ◽  
T. Tábi ◽  
A. Valadez-Gonzalez
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Factorial Design ◽  
Coupling Agent ◽  
Cellulose Fibers ◽  
Microfibrillated Cellulose ◽  
Cellulose Content ◽  
Matrix Adhesion ◽  
Pull Out ◽  
Fiber Matrix

In this work, a 22 factorial design was used to study the effect of microfibrillated henequen cellulose fibers (HENCEL) and PLA-g-MA coupling agent contents on the tensile, flexural, and impact mechanical properties and the heat deflection temperature (HDT) of biodegradable PLA composites. The results show that the principal effects of HENCEL and MA are statistically significant for the tensile, flexural, HDT, and impact strength properties of PLA composites. Regarding the interactions between the principle effects, MA-HENCEL, there are differences with respect to the mechanical property; for example, for tensile and flexural mechanical properties, there is a synergistic effect between MA and HENCEL, whereas for HDT and impact strength there is not any. The micromechanical analysis shows an excellent agreement between the measured and the estimated values for both the composite tensile strength and the elastic modulus and only slight deviations were noticed for high microfibrillated cellulose fibers content. The morphological analysis via SEM indicated that the addition of PLA-g-MA improved the fiber-matrix adhesion because of the HENCEL unbounding and pull-out decreases from the PLA matrix. The use of appropriate values of matrix strength and stiffness and considering the improved fiber-matrix adhesion of the coupling agent yield a good agreement between experimental and estimated values.

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