首页|Preparation of porous starch by alpha-amylase-catalyzed hydrolysis under a moderate electric field
Preparation of porous starch by alpha-amylase-catalyzed hydrolysis under a moderate electric field
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NSTL
Elsevier
Enzymatically-catalytic conversion of starch-based industrial waste into porous materials was enhanced by a moderate electric field (MEF). Changes in the hydrolysis rate, a-amylase activity and starch structure during MEF treatment (0-20 V, 0-400 Hz, room temperature and 0-2 h) were monitored and the hydrolyzed products were characterized by scanning electron microscopy, X-ray diffraction and water/oil adsorption analyses. The results showed that MEF enhanced enzymatic hydrolysis mainly by destroying starch structure, rather than by altering a-amylase activity. The average number of pores of hydrolyzed starch increased when voltage increased from 2 to 15 V, but a further increase of voltage caused the gelatinization of starch, thus making it unfavorable for the preparation of porous materials. The crystallinity of electrically-treated porous starches was decreased by 2.87-5.06%. The water and oil adsorption capacity of the porous starches was much higher than that of their native counterpart. Overall, this study extends the applications of electric field-based techniques in an enzymatic modification of biomaterials.
Non-thermal effectPolarization effectGranular structureAdsorption capacityClean production
NSTL
Elsevier
