• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Cogent Chemistry >Effect of transition metal ions on the thermal degradation of chitosan
【24h】

Effect of transition metal ions on the thermal degradation of chitosan

机译：过渡金属离子对壳聚糖热降解的影响

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Chitosan–transition metal compounds with Mn~(2+), Co~(2+), Ni~(2+), Zn~(2+), and Cd~(2+) were obtained containing 0–4.0% weight fraction of metal ions. The microstructure of these compounds was determined, and the effect of the metal ions on the thermal degradation of chitosan in nitrogen was studied. The results showed that the second thermal degradation of chitosan was significantly affected by the metal ion species. The temperature of maximal weight loss rate was dependent on the content of the metal ion, with a higher metallic ion concentration sample presenting a lower temperature, and also the metal ion species, which decreased in the order Cd~(2+)??Ni~(2+)??Mn~(2+)??Co~(2+)??Zn~(2+). However, the weight loss, which decreased with an increasing weight fraction of the metal ion, was not proportional to the initial metal concentration in the compound. The activation energies of the second thermal degradation of the compounds were calculated and compared.
机译：获得了含Mn〜（2 +），Co〜（2 +），Ni〜（2 +），Zn〜（2+）和Cd〜（2+）的壳聚糖过渡金属化合物，其重量分数为0-4.0％。金属离子。确定了这些化合物的微观结构，并研究了金属离子对壳聚糖在氮气中热降解的影响。结果表明，壳聚糖的第二次热降解受到金属离子种类的显着影响。最大失重率的温度取决于金属离子的含量，较高的金属离子浓度样品的温度较低，并且金属离子的种类按Cd〜（2+）→> 3的顺序降低。 Ni〜（2+）→> Mn〜（2+）→> Co〜（2+）→> Zn〜（2+）。但是，重量损失随金属离子重量分数的增加而降低，与化合物中的初始金属浓度不成比例。计算并比较了化合物第二次热降解的活化能。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号