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丙酮酸改性壳聚糖的制备及应用

作  者:
陈忻;胡秀梅;洪祥乐
单  位:
佛山科学技术学院理学院
关键词:
壳聚糖;丙酮酸;丙酮酸改性壳聚糖;吸附
摘  要:
利用壳聚糖C2位上活泼氨基与丙酮酸进行席夫碱反应,制取丙酮酸改性壳聚糖(简称为PCTS)。实验结果表明其最佳的合成条件为:1.8g溶胀的壳聚糖与1.48g丙酮酸在pH=4~5反应4h后,加入1.7g NaBH4反应1.5h,合成的1.6g PCTS,取代度可达88.14%。结果显示0.1g的PCTS吸附0.1g/L的Cu(Ⅱ)和Zn(Ⅱ),其吸附率分别可达100%和99.29%;PCTS对NO2也有一定的清除作用,11mg/ml的取代度为85.79% PCTS对NO2的清除率可达50.57%。
译  名:
Preparation and Application of Chitosan Modified by Pyruvic Acid
作  者:
CHEN Xin,HU Xiu-mei,HONG Xiang-le(Science Academy, Foshan College of Science and Technology, Foshan 528000,China)
关键词:
chitosan;pyruvic acid;chitosan modified by pyruvic acid;absorption of Cu(Ⅱ)and Zn(Ⅱ)
摘  要:
The modified Chitosan polymer (PCTS) containing schiff-base group was synthesized by the chemical modificationof an amino group of chitosan with pyruvic acid. The experimental results showed that the optimum conditions were:1.8gchitosan reacted with 1.48g pyruvic acid under the aqeous solution at pH4~5 for 4h and then was reduced by 1.7g NaBH4 for1.5h to produce 1.6g PCTS. The product(PCTS) could be dissolved in distilled water, 1% sodium hydroxide solution and 0.3mol/L hydrochloric acid. The analysis showed that the substituted rate of schiff-base group was 88.14%. In comparison withchitosan, the PCTS had a higher absorption rate of Cu(Ⅱ)and Zn(Ⅱ). The PCTS could also remove the NO2 with its removingrate as high as 50.57%.

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