The hydrophobic starch derivatives were prepared by the reaction between the dodecenyl succinic anhydrides(DDSA) and starch. The effects of starch content in water, anhydride content, pH values and temperature on the ...The hydrophobic starch derivatives were prepared by the reaction between the dodecenyl succinic anhydrides(DDSA) and starch. The effects of starch content in water, anhydride content, pH values and temperature on the reaction efficiency were studied. Adding the anhydride to the starch slurry in pre emulsified form makes the reaction faster and more efficiently.展开更多
One new hydroxypropyl hydroxyethyl starch derivative with fine thermoplasticity,of which glass temperature T g≈140℃ and flow temperature T f≈170℃,was prepared when corn starch was properly coupled with epichlorohy...One new hydroxypropyl hydroxyethyl starch derivative with fine thermoplasticity,of which glass temperature T g≈140℃ and flow temperature T f≈170℃,was prepared when corn starch was properly coupled with epichlorohydrin then hydroxypropylated and hydroxyethylated in high substitution values.The derivative might be able to used alone or as an additive to plasticate with plastics etc for degradable materials.展开更多
文摘将以氮为中心的交联淀粉与丙烯酰胺进行接枝共聚和磺化,合成了淀粉衍生物硫代氨基淀粉黄原酸盐(DSX),并通过红外光谱分析对其结构进行了表征。用DSX处理Cu2+,Pb2+,Zn2+,Cd2+浓度均为20 mg/L的模拟重金属废水,结果表明,当温度为20℃,pH为7,DSX投加量为1.5 g/L,处理时间20 m in时,Cu2+,Pb2+,Zn2+,Cd2+的吸附去除率分别达到99.5%,99.4%,99.0%,99.2%。
文摘The hydrophobic starch derivatives were prepared by the reaction between the dodecenyl succinic anhydrides(DDSA) and starch. The effects of starch content in water, anhydride content, pH values and temperature on the reaction efficiency were studied. Adding the anhydride to the starch slurry in pre emulsified form makes the reaction faster and more efficiently.
文摘One new hydroxypropyl hydroxyethyl starch derivative with fine thermoplasticity,of which glass temperature T g≈140℃ and flow temperature T f≈170℃,was prepared when corn starch was properly coupled with epichlorohydrin then hydroxypropylated and hydroxyethylated in high substitution values.The derivative might be able to used alone or as an additive to plasticate with plastics etc for degradable materials.
