彭超,陈广学,徐军飞.氨基葡萄糖分子上羧基含量对壳聚糖性能影响[J].包装工程,2017,38(13):78-83.
PENG Chao,CHEN Guang-xue,XU Jun-fei.Effect of Carbonxyl Content of Glucosamine Molecules on the Properties of Chitosan[J].Packaging Engineering,2017,38(13):78-83. |
| 氨基葡萄糖分子上羧基含量对壳聚糖性能影响 |
| Effect of Carbonxyl Content of Glucosamine Molecules on the Properties of Chitosan |
| 投稿时间：2017-01-19 修订日期：2017-07-10 |
| DOI： |
| 中文关键词: 漆酶-TEMPO 壳聚糖 羧基含量 抗氧化性 包装材料 |
| 英文关键词: laccase-TEMPO chitosan carboxyl content anti-oxidant activity packaging materials |
| 基金项目:国家自然科学基金（201404042）；广州市科技计划（201607020045） |
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| 中文摘要: |
| 目的 利用漆酶-TEMPO（TEMPO为2,2,6,6-四甲基哌啶-1-氧基的简称）体系氧化低聚壳聚糖，探究氨基葡萄糖分子上引入的羧基含量对壳聚糖性能的影响，以期壳聚糖在包装方面的应用能够更为广泛。方法 通过高效离子色谱（HPIC）检测样品的钠离子含量表征样品的羧基含量，通过检测样品的吸湿保湿性、抗氧化性能表征壳聚糖物理化学性能的改善程度。结果 壳聚糖分子上引入羧基有利于改善其吸湿、保湿性能，氧化产物在饱和碳酸钾与饱和硫酸铵溶液中60 h后吸湿率最高达63.0%, 18.4%，保湿率为5.7%，而当氧化程度超过45.31%时，氧化产物的吸湿、保湿性能保持不变。结论 TEMPO添加量越多，氧化产物的羧基含量越高。引入的羧基基团能够改善壳聚糖氧化产物的吸湿、保湿性能，而增加氨基葡萄糖分子上的羧基含量，会提高壳聚糖的抗氧化性能。这些性能的提高对壳聚糖在包装材料的应用具有长远意义。 |
| 英文摘要: |
| The work aims to explore the effects of introduced carbonxyl content of glucosamine molecules on the properties of chitosan with low molecular weight oxidized by laccase-TEMPO (TEMPO is short for 2,2,6,6- tetramethyl-1-piperidinyloxy) system, for the purpose of broadening the application of chitosan in packaging area. The content of sodium ions in the samples to be detected with high-performance ion chromatography (HPIC) was used to characterize the carboxyl group content of the sample. The improvement degree of physical and chemical properties of chitosan was characterized by detecting the moisture absorbability and retentivity and oxidation resistance of the samples. The introduced carbonxyl of chitosan molecules could help to improve the moisture absorbability and retentivity. The rate of moisture absorption of oxidation products in saturated potassium carbonate and saturated ammonium sulfate solutions for 60 h could respectively reach up to 63.0% and 18.4%, and the rate of moisture retention was 5.7%. However, when the oxidation degree exceeded 45.31%, the moisture absorbability and retentivity remained unchanged. The more addition of TEMPO is, the more carboxyl content of oxidation products is. The introduced carboxyl groups can improve the moisture absorbability and retentivity of chitosan’s oxidation products. The increase in the carbonxyl content of glucosamine molecules will improve the oxidation resistance of chitosan. Such improvement is of far-reaching importance for the chitosan to be applied in the packaging materials. |
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