• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Functionalized graphene oxide/carboxymethyl chitosan composite aerogels with strong compressive strength for water purification
【24h】

Functionalized graphene oxide/carboxymethyl chitosan composite aerogels with strong compressive strength for water purification

机译：官能化的石墨烯氧化物/羧甲基壳聚糖复合气凝胶具有较强的挤压强度施加净化强度

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A new type of polydopamine functionalized graphene oxide/carboxymethyl chitosan (DGO/CMC) composite aerogels was synthesized via sol-gel once-forming self-assembly and lyophilization. Polydopamine (PDA) on the surface of GO nanosheets replaced those traditional crosslinking agents to connect CMC chains via hydrogen bonding for the establishment of 3D porous aerogels. With the increasing proportion of CMC, the microstructure of aerogels changed from small pores to large plate-bridge-like pores. In addition, their maximum compressive strengths were 6.767, 11.94, and 16.98 MPa under 90% compressions, respectively, which increased in accordance with CMC content. Furthermore, the adsorption system of the aerogels was simulated well by the pseudo second-order kinetic model and the Langmuir isotherm model, with maximum mass adsorption capacities of 170.3, 186.8, and 312.8 mg/g for Cu2+, Ni2+, and Pb(2+)ions, respectively. These composite materials have potential applications for water purification because of their simple and efficient synthesis and excellent recyclability and reusability.
机译：通过溶胶-凝胶一次自组装和冷冻干燥，合成了一种新型的聚多巴胺功能化氧化石墨烯/羧甲基壳聚糖（DGO/CMC）复合气凝胶。GO纳米片表面的聚多巴胺（PDA）取代了传统的交联剂，通过氢键连接CMC链，形成三维多孔气凝胶。随着羧甲基纤维素比例的增加，气凝胶的微观结构由小孔隙变为大的板桥孔。此外，在90%压缩条件下，它们的最大抗压强度分别为6.767、11.94和16.98 MPa，随着CMC含量的增加而增加。此外，气凝胶的吸附系统通过伪二级动力学模型和Langmuir等温线模型得到了很好的模拟，对Cu2+、Ni2+和Pb（2+）离子的最大质量吸附容量分别为170.3、186.8和312.8 mg/g。这些复合材料由于其简单高效的合成以及良好的可回收性和可再利用性，在水净化方面具有潜在的应用前景。

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