| abstract |
The purpose of the present invention is to provide a kind of synthetic methods of modified starch environment-friendly materials, first using cornstarch as raw material, use epoxychloropropane as crosslinking agent, obtain high crosslinked starch；Next HClO to be added in crosslinked starch 4 As initiator, epoxychloropropane is added as etherifying agent, has synthesized intermediate product etherification starch, then etherification starch and 1,3- propane diamine are reacted under alkaline condition again, can obtain amino starch, amino group is introduced on starch chain.Again using amino starch as primary raw material, dithiocarbamate modified starch has been synthesized by dithiocarbamate modified, then modified starch acrylamide grafted copolymer is generated by skeleton and generation polymerisation in acrylamide reversed-phase emulsion of dithiocarbamate modified starch.It is good that the beneficial effects of the invention are as follows the flocculating effects of the graft copolymer of modified starch. |