摘要
首先利用高效阴离子交换色谱法分析了苦樱桃树胶杂多糖的单糖成分,然后以苦樱桃树胶杂多糖为原料,通过与丙烯酰胺的接枝共聚反应制备了树胶-丙烯酰胺接枝共聚物(TG-AM)。对TG-AM进行了红外光谱和扫描电镜分析,并研究了TG-AM对Cu^(2+)的吸附特性。结果表明:苦樱桃树胶杂多糖中含量最高的单糖为D-半乳糖和L-阿拉伯糖,分别为41.56%和38.72%;红外光谱分析表明,丙烯酰胺已成功接枝到杂多糖分子上;扫描电镜图像显示,TG-AM的表面及内部分布着大量彼此独立或相连的微孔,孔径为2~10μm;TG-AM对Cu^(2+)的吸附受溶液pH值影响较大,最佳pH值为6~7,而且吸附过程符合Langmuir单分子层等温吸附模型,20℃时最大理论吸附量(Q_m)为27.93 mg/g。
The high-performance anion exchange chromatography （HPAEC） system was used to determine the monosaccharide compositions of Yunnan bitter cherry tree gum. Then, the hetero polysaccharide of tree gum was used as raw material to graft copolymerize with acrylamide and then the tree gum-aerylamide graft copolymer product （TG-AM） was prepared. The TG-AM was characterized by FT-IR and scanning electron microscope （SEM） analysis, and the adsorption properties of Cu2＋ on TG-AM were investigated. The results indicated that the most abundant monosaccharide compositions of the tree gum hetero polysaccharide were D-galactose and L-arabinose, and the relative percents were 41.56% and 38. 72%, respectively. The FT-IR analysis revealed that acrylamide had successfully grafted onto hetero polysaccharide molecules. The SEM images showed that the surface and inside of the graft copolymer had a lot of independent or conjoint micropores with the pores diameter of 2 - 10 μm. The adsorption of Cu2 ＋ on TG-AM was affected by the solution pH with the optimal pH of 6 - 7, and agreed with the Langmuir isothermal model with the maximum theoretical adsorption quantity （ Qm ） of 27. 93 mg/g at 20 ℃.
出处
《林产化学与工业》
EI
CAS
CSCD
北大核心
2017年第2期65-71,共7页
Chemistry and Industry of Forest Products
基金
国家自然科学基金资助项目(31260179)
云南省教育厅科学研究基金资助项目(2015Y308)
关键词
树胶
杂多糖
丙烯酰胺
接枝共聚
吸附
tree gum
hetero polysaccharide
acrylamide
graft copolymerization
adsorption
