Papers by Keyword: Maize Starch

Abstract: In this article we provide results on the preparation of starch-based block copolymer with polyacrylic acid by radical polymerization. Starch was pregelatinized and then reacted with acrylic acid in the presence of radical polymerization initiator. Resulting mixture was used to prepare cast-films. Structure of the polymer films was investigated by gel filtration chromatography, FTIR and DCS analysis. It was found that structure of the films represents starch-graft-polyacrylic acid dispersed in a starch matrix. Results of DCS and FTIR suggested that polyacrylic acid acts as additional plasticizer for starch films.

Abstract: Maize starch is abundant in quantity in China. The hazard from dust explosion of maize starch was very great. Number simulation is a good way to predict the consequent of dust explosion, but the known of reaction kinetics of hazardous materials is necessary. The objective of this research was to determine the reaction kinetics of maize starch using thermo-gravimetric analyses. Thermo-gravimetric analyses of maize starch were performed at heating rates of 5, 10, and 15 min^-1 in an air atmospheres. The weight losses of maize starch in an air atmosphere were found to occur in three stages. The parameters of the reaction kinetics were obtained in Stage and .

Abstract: This study formulated maize-starch based cutting fluids and determined the performance of the cutting fluids for use in turning AISI 304 stainless steel with P35 coated carbide tool. This was with a view to determining the effect of the maize-starch based cutting fluids on power consumption and temperature developed at the tool-workpiece interface during turning of AISI 304 stainless steel using P35 coated carbide tool. The results showed that the temperature at the cutting zone increase with increase in depth of cut while the power consumed decreased with increase in the cutting fluid flow rate. At the best machining data point, maize-starch based cutting fluid showed reduced temperatures and power consumed as compared to the conventional cutting fluids used for the study: 34oC and 0.735 W for maize starch mixed with soluble oil, 40oC and 0.733 W for maize starch mixed with coconut oil respectively. Corresponding values for straight coconut oil were 47.5oC and 0.942 W and for soluble oil mixed with water, 37.5oC and 1.729 W, respectively. It is concluded that maize-starch based cutting fluids are effective in reducing the temperature and power consumed during cylindrical turning. The results indicated that maize-starch mixed with soluble oil has remarkable potentials for use as a cutting fluid.