Aspects of the preparation of starch microcellular foam particles crosslinked with glutaraldehyde using a solvent exchange technique

摘要: Abstract Starch microcellular foam (SMCF) has been produced using a solvent exchange technique with native corn starch crosslinked glutaraldehyde. To produce high specific surface area for the particles cooked solution was reacted glutaraldehyde and then precipitated under shear ethanol. The relationship between crosslinking density on void structure of SMCF studied. Characterization by NMR confirmed reaction. An increase in concentration from 0 to 15 g glutaraldehyde/100 g accompanied decrease particle size moisture content an brightness area. Scanning electron microscope images show that smallest average diameter obtained 0.182 μm at 7.5 g starch. Four materials having different viscosity were prepared hydrolysis 1 N HCl/methanol system reaction durations investigate molecular weight SMCF. starches ethanol form Decreasing decreased area, increased size, content. Increases stirring speed during precipitation enhanced properties particles. effect pressing pellet caused collapse pressures above about 6000 psi. results indicate structure/chemistry material processing conditions can be controlled order morphology useful light scattering applications. In particular, higher intermolecular have found enhance formation.