【摘要】 在以二甲基亚砜为溶剂的均相反应体系中,以双醛淀粉和苯胺为底物,乙酸为催化剂,N2保护下,合成了双醛淀粉-苯胺希夫碱。得到的最佳反应条件为:以二甲基亚砜为溶剂,双醛淀粉质量浓度为100 g/L,体系中乙酸体积分数3%,反应温度50℃,醛基与氨基的摩尔比为2:1,反应时间12 h。在最佳条件下,以双醛摩尔分数为5%的双醛淀粉(DAS5)为底物的苯胺利用率为94%;以双醛摩尔分数为20%的双醛淀粉(DAS20)为底物的苯胺利用率为55%。通过FTIR、NMR和XRD对双醛淀粉-苯胺希夫碱的结构进行了表征。更多还原

【Abstract】 Dialdehyde starch-aniline Schiff-base(DAS-AN) was synthesized,with dialdehyde starch(DAS) and aniline as reactants and acetic acid as catalyst,in dimethyl sulfoxide(DMSO) homogeneous system in N2 atmosphere.The synthesis conditions of DAS-AN were studied and the optimum conditions were as follows:the mass concentration of DAS is 100 g/L in DMSO,the dosage of acetic acid is 3%(volume fraction),reaction temperature is 50 ℃,the molar ratio of aldehyde group to amino group is 2∶ 1,and reaction time is 12 h.Under these optimum conditions,the utilization ratio of aniline is 94% with DAS5(the dialdehyde molar fraction is 5%) as reactant,and 55% with DAS20(the dialdehyde molar fraction is 20%) as reactant.The structure of DAS-AN is characterized by means of FTIR,NMR and XRD.更多还原