Papers by Keyword: Soybean Oil

Abstract: Under the condition of nine kinds of storage, In this thesis, through the determination of acid value of soybean oil, to search for the best storage condition, used to prevent the soybean oil acid value rise, through the analysis of the acid value data, We find the best storage condition, is 0°C, 6% moisture content, and PVC plastic wrap packaging.

Abstract: A S-containing additive, sulfuration modified soybean oil (named as SSO), was prepared by chemical modification of soybean oil with sulfur compounds. The friction and wear performances of AZ91D magnesium alloy against GCr15 bearing steel under the lubrication of rapeseed oil formulated with SSO were evaluated on a SRV tribotester. The topographies and the chemical species of the worn surfaces of magnesium alloy were analyzed by a scanning electron microscope (SEM) and an X-ray photoelectron spectroscope (XPS), respectively. The results indicated that the friction and wear of the magnesium alloy-steel tribomates could be effectively reduced by formulating SSO into rapeseed oil lubricant. The friction coefficients and the wear volumes of magnesium alloy decreased with increasing contents of SSO. The surface lubricated with SSO-doped rapeseed oil was characterized by less wear as compared with that lubricated with neat rapeseed oil. The enhanced anti-wear and friction-reducing abilities of rapeseed oil by SSO in the lubrication of magnesium alloy against steel were ascribed to the formation of a composite boundary lubrication film due to the strong adsorption of SSO and rapeseed oil onto the lubricated surfaces and their tribochemical reactions with magnesium alloy.

Abstract: This paper studied the soybean under different temperature storage processing stability of greaseComparison of the moisture content, oil acid value and peroxide value under - 10 °C 0 °C and room temperature storage stored two years in soybean production fat The results show that,The higher the temperature the lower stability of greaseThe higher the temperature, the lower stability of moisture contentUnder - 10 °C, water content change is only 0.04%. at Room temperature the moisture content changes 0.11%The higher the temperature, the soybean processing oil acid value, peroxide value, the greater the increaseunder - 10 °CAcid value increased by 0.07KOH/(mg/g), under room temperature the acid value increases 0.97 KOH/(mg/g)Under - 10 °C peroxide value change tendency for 0.6 mmol/kg, room temperature peroxide value change tendency for 3.9 mmol/kgTherefore, low temperature could delay the deterioration of quality of soybean, and further improve the variation of water content, and delayed the acid value and peroxide value increase.

Abstract: Industrially the epoxidation of soybean oil utilize peracids as oxidizing agents together with strong mineral acids as catalyst. To avoid the corrosive waste and undesirable epoxy-ring opening as well as polymerization under acidic conditions, new green catalytic processes in acid-free system have been paid great attentions in recent years. In this paper, MoO₃/Al₂O₃ simply prepared by impregnation method and mesoporous TS-1 prepared by one-pot hydrothermal method were evaluated as catalysts for the epoxidation of soybean oil with tert-butyl hydroperoxide. Orthogonal experiment design was used to optimize the reaction conditions for MoO₃/Al₂O₃ and the optimized conditions are as reaction temperature of 80°C, reaction time of 4h, the ratio of double bond to TBHP of 1:1.4, and the ratio of Ti to double bond of 1%. Higher than 55.8% of selectivity would be obtained. The synthesized meso-TS-1 displayed worse performance than expected result, only 27.6% of epoxy selectivity at conversion of 38.7%.

Abstract: In this study, waterborne maleinized epoxidized soybean oil (WMESO) films were prepared and characterized in order to investigate their thermal properties, mechanical properties and surface morphology. A series of coating films were cured onto glass substrate. Differential Scanning Calorimetry (DSC) analysis showed that the coating films have glass transition temperature (T_g) ranging between 36-38 °C. Thermogravimetric analysis (TGA) revealed that waterborne films couls stand very high temperature up to 600 °C. W-2.0 was the best sample in terms of hardness. Film adhesion test showed that the adhesion between film and substrate was good. Higher initial water content gave films with better physical properties but poorer adhesion to substrate. Scanning Electron Microscopy (SEM) was used to visualize the surface morphology of film as well as the formation of resin. It was observed that, the particles were well dispersed and were crosslinked to each other.

Abstract: The aim of this study was to investigate the effect of antioxidants of soybean oil and virgin olive oil during heating. Tocopherol and total phenol content in oils were determined by HPLC and Folin test, respectively. Antioxidant activity was measured with scavenging-activity (RSA) of free radical 1,1-diphenyl-2-picrylhydrazyl (DPPH·) by spectrophotometer. Among the antioxidants studied, comparable activity was found between Trolox and tocopherol, while activity of phenol was low in the study. Tocopherol compounds contribute the RSA of soybean oil, and the RSA of virgin olive oil was from phenol compound as well as tocopherols. Our study showed the variety and content of antioxidants influence RSA of vegetable oils, which concerned the stability and nutrition quality of vegetable oil.

Abstract: Ultrasound-assisted ionic liquid ester exchange Preparation of biodiesel, effects of alcohol to oil ratio, reaction time, reaction temperature, the amount of ionic liquid and ultrasonic power factors on the rate of transesterification. The results showed that ultrasound-assisted ionic liquid soybean oil catalyzed preparation of biodiesel process: ultrasonic power 280W, alcohol-oil ratio of 10:1, 10% of the amount of catalyst is the quality of the raw oil, the reaction temperature of 100 ° C, reaction time 50min, biodiesel yield up to 92.5%.

Abstract: The aim of study was to prepare a water compatible form of soybean oil through nanoemulsification. Factors affecting properties of nanoemulsions containing soybean oil such as types and amounts of surfactants (Tween 60, Cremophor RH-40, sodium lauryl sulfate (SLS) and Lutrol F-127) were investigated. The results demonstrated that types and amount of surfactants affected the formation and physical stability of nanoemulsions. The emulsions containing Cremophor RH-40 and Lutrol F-127 showed 100% creaming while those containing Tween 60 and SLS indicated the lower percentage of creaming suggesting the less physical stability. However, the formation of nanoemulsions was not observed in the formula containing Lutrol F-127. The average droplet size of emulsions was 1766 nm and 193 nm for emulsions containing 5% w/w Lutrol F-127 and Cremophor RH-40, respectively. The droplet size was also affected by the amount of Cremophor RH-40. The droplet size was decreased from 795 to 114 nm as increasing amount of Cremophor RH-40 from 2.5 to 10 %w/w. Additionally, the properties of nanoemulsions containing Cremophor RH-40, including physical appearance, droplet size and zeta potential, were not change even after temperature cycling. In conclusion, the more water compatible form of soybean oil was accomplished through incorporation into the nanoemulsions with specific type and amount of surfactant.

Abstract: Two bio-based polyols (Polyol-r and Polyol-t) were synthesized from commercially available epoxidized soybean oil (ESBO). Polyol-r was obtained from ring opening of ESBO in the presence of fluoboric acid, while Polyol-t from a transesterification of Polyol-r with glycerol through a litharge catalyst. A rigid polyurethane foam was prepared by mixed polyols (Polyol-t and commercial 635 polyether polyol) with 4,4'-methylene-bis (phenyl isocyanate). The hydroxyl value of Polyol-t was higher than that of Polyol-r, which was also backed up by Fourier transform infrared spectrometry. Scanning electron microscope examination revealed that the foam has closed cells. The test of performances of the foam shows that it possesses an excellent dimension stability and compressive strength.

Abstract: Biodiesel is a renewable, biodegradable, and nontoxic fuel. At present, biodiesel is primarily produced in batch reactors in which the required energy is provided by heating accompanied by mechanical mixing. Alternatively, ultrasonic processing is an effective way to attain required mixing while providing the necessary activation energy. Biodiesel was synthesized by soybean oil using ultrasonication and alkali-acid catalysis method. Its structure was characterized by gas chromatograph, and the effects of various factors on transesterification rate were studied. The results show that a biodiesel yield in excess of 98% can be achieved in 30 min, methanol/oil molar ratio of 6:1, alkali-acid catalysis includes 0.5% of NaOH and 0.5% of solid super acid.