Du Xiaoyu, Nie Hailiang, Qu Yanqing, Xu Jingyu, Jia Hongge, Zhang Yong, Ma Wenhui, Du Boyu
Heilongjiang Provincial Key Laboratory of Polymeric Composition, College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, China.
Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Guangxi University, Nanning 530004, China.
Nanomaterials (Basel). 2025 Jul 26;15(15):1157. doi: 10.3390/nano15151157.
Melamine sponges have demonstrated significant application potential in the field of adsorption materials due to their unique three-dimensional porous network structure, excellent chemical/mechanical stability, and abundant amino active sites on the surface. However, the development of modified melamine sponges with efficient Congo red dye removal capabilities remains a substantial challenge. In this study, a stable linear polymer network structure was constructed on the surface of melamine sponges via an in situ polymerization strategy based on the Schiff base reaction mechanism. Characterization analyses reveal that the modified sponge not only retained the original porous skeleton structure but also significantly enhanced the density of surface active sites. Experimental data demonstrate that the modified sponge exhibited excellent adsorption performance for Congo red dye, with the adsorption process conforming to the pseudo-second-order kinetic model and achieving a practical maximum adsorption capacity of 380.4 mg/g. Notably, the material also displayed favorable cyclic stability. This study provides an efficient adsorbent for Congo red dye-contaminated wastewater treatment through the development of a novel surface-functionalized sponge material while also offering new solutions for advancing the practical applications of melamine-based porous materials and environmental remediation technologies.
三聚氰胺海绵因其独特的三维多孔网络结构、优异的化学/机械稳定性以及表面丰富的氨基活性位点，在吸附材料领域展现出显著的应用潜力。然而，开发具有高效去除刚果红染料能力的改性三聚氰胺海绵仍然是一项重大挑战。在本研究中，基于席夫碱反应机理，通过原位聚合策略在三聚氰胺海绵表面构建了稳定的线性聚合物网络结构。表征分析表明，改性海绵不仅保留了原有的多孔骨架结构，还显著提高了表面活性位点的密度。实验数据表明，改性海绵对刚果红染料表现出优异的吸附性能，吸附过程符合准二级动力学模型，实际最大吸附容量达到380.4 mg/g。值得注意的是，该材料还表现出良好的循环稳定性。本研究通过开发新型表面功能化海绵材料，为刚果红染料污染废水处理提供了一种高效吸附剂，同时也为推进三聚氰胺基多孔材料的实际应用和环境修复技术提供了新的解决方案。
