Functionalized graphene oxide/carboxymethyl chitosan composite aerogels with strong compressive strength for water purification,Journal of Applied Polymer Science

当前位置： X-MOL 学术 › J. Appl. Polym. Sci. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Functionalized graphene oxide/carboxymethyl chitosan composite aerogels with strong compressive strength for water purification
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-10-22 , DOI: 10.1002/app.50065
Jingqi Luo ₁ , Chuanjie Fan ₁ , Xiaodong Zhou _{1,

2}

Affiliation

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 Pb²⁺ ions, respectively. These composite materials have potential applications for water purification because of their simple and efficient synthesis and excellent recyclability and reusability.

中文翻译：

具有强大抗压强度的功能化氧化石墨烯/羧甲基壳聚糖复合气凝胶用于水净化

通过溶胶-凝胶一次成型自组装和冻干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，从而建立了3D多孔气凝胶。随着CMC比例的增加，气凝胶的微观结构从小孔变为大的板桥状孔。此外，在90％压缩下，它们的最大抗压强度分别为6.767、11.94和16.98 MPa，随CMC含量的增加而增加。此外，利用伪二级动力学模型和Langmuir等温线模型很好地模拟了气凝胶的吸附系统，最大质量吸附能力为170.3，²⁺，Ni ²⁺和Pb ²⁺离子。这些复合材料具有简单有效的合成方法以及出色的可回收性和可重复使用性，因此在水净化方面具有潜在的应用前景。

更新日期：2020-12-14

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南