Papers by Keyword: Single Factor Experiment

Abstract: We present a method to fabricate superhydrophobic surfaces on copper substrate using reciprocating type high speed wire cut electrical discharge machining (HS-WEDM) and self-assembly technology. Herein, single factor experiment was used to investigate the influence of several major parameters of the wire electrical discharge machining processing, such as pulse width, pulse gap (pulse interval) and power tube, on the contact angle of resulting surface. Results show that a composite structure, composed of craters and projections, is fabricated on the copper surface, which is the key reason of superhydrophobicity. With the change of pulse width, pulse interval, and the number of the power tube, the hydrophobic properties of resulting copper surface was changed. This paper provided the theoretical support for industrialized fabrications of super-hydrophobic brass surface.

Abstract: The surface of polypropylene (PP) nonwovens was modified by low-temperature plasma technology. Three factors influencing the plasma treatment, i.e. current, time and distance between nozzle and fabric surface, were studied by single factor experiments. The effect of hydrophilic modification of PP nonwovens was evaluated with water absorption. The variation of water absorption of PP nonwovens after plasma treatment was tested. The experimental results show that the plasma treatment can improve the water absorbability of PP nonwovens. The water absorbability increases with the increasing current, but decreases with the increasing distance from nozzle to fabric surface. With the increase of time, the water absorbability increases firstly then decreases.

Abstract: The purpose of this study to establish the optimum ultrasound-assisted extraction (UAE) parameters of Polysaccharides from Agaricus bisporus mycelia (PABM). Single factor experiment was employed to determine the preliminary range of the extraction parameters including liquid-solid ratio, ultrasonic time, extraction temperature, and ultrasonic power. Then, an orthogonal experiment design was employed to determine the best extraction parameters of PABM. the results showed that the optimal UAE parameters of PABM was liquid-solid ratio of 40 ml/g, ultrasonic time of 70 min, extraction temperature of 55°C, and ultrasonic power of 660 W.

Abstract: Members belonging to the genus Brevibacillus had potentials in the bioremediation of hydrocarbon-contaminated soils. However, little is known about the fermentation medium and culture conditions of Brevibacillus panacihumi. The effect of concentrations of glucose and (NH₄)₂SO₄, initial pH value and culture temperature on the biomass of B. panacihumi W25 was measured with single factor experiments, which was a hydrocarbon-degrading bacterium. Polynomial regression analysis showed optimal concentration of glucose and (NH₄)₂SO₄, initial pH value and culture temperature were 45.2 g/L, 0.6 g/L, pH 7.3 and 30.3°C, respectively. The optimization of fermentation of B. panacihumi was reported for the first time.

Abstract: Autonomous coal fly ash modified by vitriol (H₂SO₄) was used to treat Phenol Waste Water. The treatment influences were determined by single-factor experiment and the prioritizing importance and optimizing combination of the influences were studied using orthogonal experiment. We found that the prioritizing importance of the influencing factors was as follow: dosage of ferrous sulfate (FeSO₄) > dosage of hydrogen peroxide (H₂O₂) > initial concentration of phenol > PH > the dosage of modified coal fly ash. The optimizing combination of the influences was 5 wt.% FeSO_4, 1 mL ; 3 wt.%H₂O₂, 7 mL; PH=5; initial concentration of phenol , 300 mg/L and the dosage of modified coal fly ash, 200 mg/L. Under the condition above, phenol removal rate was 99.46%.

Abstract: An esterification reaction of monomer acid with methanol using p-toluenesulfonic acid as catalyst for the preparation of biodiesel was studied. The process variables that influence the esterification of monomer acid, such as catalyst concentration, molar ratio of methanol to acid, reaction time and reaction temperature, were investigated and optimized. Through the single factor experiment, the optimum conditions obtained for the esterification were molar ratio of methanol to acid 3:1, usage amount of p-toluenesulfonic acid 6% and reaction time 3h, reaction temperature 70°C.The produced biodiesel was found to exhibit fuel properties within the limits prescribed by the latest American Standards for Testing Material (ASTM) and 0^# diesel oil.

Abstract: This paper investigated several influencing factors for the preparation of solid alcohol, including the amount of raw materials used such as stearic acid and copper nitrate and so on, and the temperature, etc. Through single factor experiments, the main influence factors of preparing solid alcohol were determined. And, on this basis, in view of three remarkable influence factors: the stearic acid amount used, the copper nitrate amount used and the temperature, the orthogonal experiment was carried out. Finally, the optimal preparation conditions were determined as follows: 25ml industrial alcohol, 1.3g stearic acid, 1.2ml 10% copper nitrate solution, at 75°C, pH 8, the cooling way is gradual cooling with no refluxing.

Abstract: The paper is proposed that we can use single factor experiment method and range analysis method to investigate four technological parameters (Melt temperature, Weight loss, Injection time and Gas content) of the technological parameters in the process of microcellular foam injection molding. By investigating the rules and degree which are obtained from the factors influence on bubbles morphology, it is actually meaningful that we can control and improve the bubbles morphology for improving the capability of Microcellular Foam Injection Molding materials.

Abstract: Applied in illumination area, high power LED (Light Emitting Diode) has a series of advantages with energy saving, environment-friendly, long life span, etc. However, the heat dissipation of the LED is a bottleneck in its development, and has become a key point which must be studied and solved urgently. In this paper, a typical LED lamp is modeled and thermal analysis has been performed using the software of Ansys.

Abstract: Cutting force experiments in turning aluminum-silicon alloy ZL104 are carried out with cement carbide tool YG8. The influence of cutting parameters on cutting force is obtained based on single factor experiments. The results indicate that depth of cut and feed rate have great influence on cutting force while cutting speed provides just little impact.