摘要
采用魔芋葡甘聚糖颗粒 (KGG)在醇水溶液中合成了羧甲基魔芋葡甘聚糖微球 (CMKGG) ,进而合成了交联羧甲基魔芋葡甘聚糖微球 (CCMKGG) ,讨论了合成过程中的影响因素。通过应用正交设计的方法确定了碱用量为魔芋葡甘聚糖 (KGM )量的 2 0 % ,氯乙酸用量为KGM量的 10倍 ,温度 5 5℃ ,反应 8h制得的羧甲基魔芋葡甘聚糖的羧甲基程度较好。交联产物具有较好的交换容量。红外光谱、光学显微镜和扫描电镜的结果表明 ,该颗粒为蜂窝状多孔微球 ,粒度均匀。经测试其阳离子交换容量为 0 .95 38mmol/g ,不溶于水 ,对酸。
Carboxymethyl-konjac-glucomannan granules(CMKGG) are prepared from konjac-glucomannan granules(KGG) and chloroacetic acid in alcohol solution.The crosslinked carboxymethyl-konjac-glucomannan granules((CCMKGG)) is then prepared.Factors influencing the reaction are discussed.CCMKGG may be used as a new adsorbent.From orthogonal experiments,the optimum conditions are:NaOH 20% of KGG,chloroacetic acid 10 times of KGG,temperature 55 ℃,reacting time 8 h with 30% alcohol solution,to obtain the product with good exchange capa-(city).The results of IR,optical microscopy and SEM measurements show that CCMKGG are alveolate particles of homogeneous granularity,with cation interchange capacity 0.953 8 mmol/g.CCMKGG are insoluble in water,and stable in acid and alkali.
出处
《林产化学与工业》
EI
CAS
CSCD
2004年第3期83-86,共4页
Chemistry and Industry of Forest Products
基金
湖北省自然科学基金资助项目 (2 0 0 3ABA0 73)
国家科技部三峡移民科技开发专项资助项目(2 0 0 4EP0 90 0 2 5 )
关键词
魔芋葡甘聚糖
羧甲基化
吸附剂
konjac-glucomannan
carboxymethylation
adsorbent
