Faculty of Science Arts and Sciences, Middle East University, Amman 11610, Jordan.
Department of Chemistry, Faculty of Science, The University of Jordan, Amman 1118, Jordan.
Molecules. 2022 Jun 7;27(12):3656. doi: 10.3390/molecules27123656.
Chelating hyperbranched polyester (CHPE) nanoparticles have become an attractive new material family for developing high-capacity nanoscale chelating agents with highly branched structures and many functional groups in the main chains and end groups that can be used to remove heavy metals from water. In this study, a hyperbranched polyester with a particle size of 180-643 nm was synthesized with A+B interfacial polymerization, using dimethylmalonyl chloride as the difunctional monomer (A) and 1,1,1-tris(4-hydroxyphenyl)ethane (THPE) as the trifunctional monomer (B). FTIR and NMR were used to characterize the CHPE and confirm the structure. The CHPE nanoparticles were generally considered hydrophilic, with an observed swelling capacity of 160.70%. The thermal properties of the CHPE nanoparticles were studied by thermal gravimetric analysis (TGA) with 1% mass loss at temperatures above 185 °C. The XRD of the CHPE nanoparticles showed a semi-crystalline pattern, as evident from the presence of peaks at positions ~18° and 20°. The nature of the surface of the CHPE was examined using SEM. Batch equilibrium was used to investigate the removal properties of the CHPE nanoparticles towards Cd(II) ions as a function of temperature, contact time, and Cd(II) concentration. The Cd(II) ion thermodynamics, kinetics, and desorption data on the CHPE nanoparticles were also studied.
螯合超支化聚酯 (CHPE) 纳米粒子已成为开发具有高度支化结构和主链和端基上许多功能基团的高容量纳米级螯合试剂的一种有吸引力的新材料家族，可用于从水中去除重金属。在这项研究中，通过 A+B 界面聚合，使用二甲基丙二酰氯作为二官能单体 (A) 和 1,1,1-三(4-羟基苯基)乙烷 (THPE) 作为三官能单体 (B)，合成了粒径为 180-643nm 的超支化聚酯。FTIR 和 NMR 用于表征 CHPE 并确认结构。CHPE 纳米粒子通常被认为是亲水性的，观察到的溶胀能力为 160.70%。通过热重分析 (TGA) 研究了 CHPE 纳米粒子的热性能，在 185°C 以上的温度下，质量损失为 1%。CHPE 纳米粒子的 XRD 显示出半结晶图案，这从位置~18°和 20°处存在峰可以看出。使用 SEM 检查了 CHPE 的表面性质。批平衡用于研究 CHPE 纳米粒子对 Cd(II)离子的去除性能作为温度、接触时间和 Cd(II)浓度的函数。还研究了 Cd(II)离子在 CHPE 纳米粒子上的热力学、动力学和解吸数据。
