Biocompatible membrane from the natural rubber-grafted-(2-hydroxyethyl methacrylate) and its metal removal application

IF 2.8 4区工程技术 Q2 POLYMER SCIENCE Macromolecular Research Pub Date : 2024-01-03 DOI:10.1007/s13233-023-00232-8

Thu Ha Nguyen, Thi Lan Pham, Anh Quan Cao, Tuan Anh Nguyen, Xuan Minh Vu, Thi My Hanh Le, Van Thuan Le, Seiichi Kawahara, Dai Lam Tran

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Abstract

This study describes the preparation and characterization of a green and safe membrane based on a natural polymer for metal adsorption. Natural rubber-grafted-(2-hydroxyethyl methacrylate) with a special nanostructure was synthesized by graft copolymerization of 2-hydroxyethyl methacrylate (HEMA) onto the surface of natural rubber (NR) particles using tert-butylhydroperoxide/tetraethylenepentamine as initiators. Optimal conditions for achieving high conversion and grafting efficiency were identified. Characterization of the as-synthesized samples was performed using Fourier-transform infrared spectroscopy, transmission electron microscopy, thermogravimetric analysis, tensile measurement, swelling degree determination, and cytotoxicity testing. The results revealed that HEMA formed a nanoscale matrix surrounding NR particles, which improved the tensile strength, thermal resistance, and swelling degree of the as-prepared samples. Cytotoxicity testing demonstrated that the membrane was safe for human use, as it did not exhibit toxicity to Vero cells at concentrations up to 1024 µg/mL. Furthermore, the membrane displayed a high adsorption capacity toward Fe³⁺ and was well described by Koble-Corrigan isotherm model and the first–second-order kinetic equation. Moreover, the membrane demonstrated excellent recyclability maintaining its adsorption ability towards Fe³⁺ ions over five consecutive cycles. Overall, these findings may recommend the NR-HEMA membrane as a promising candidate for metal removal applications.

Graphical abstract

The adsorption of metal ions on the natural rubber with PHEMA matrix

Abstract Image

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天然橡胶接枝-（2-羟乙基甲基丙烯酸酯）生物相容性膜及其金属去除应用

本研究介绍了一种基于天然聚合物的绿色安全金属吸附膜的制备和表征。以叔丁基过氧化氢/四乙烯五胺为引发剂，通过在天然橡胶（NR）颗粒表面接枝共聚甲基丙烯酸羟乙酯（HEMA），合成了具有特殊纳米结构的天然橡胶接枝甲基丙烯酸（2-羟乙基）酯。确定了实现高转化率和接枝效率的最佳条件。使用傅立叶变换红外光谱、透射电子显微镜、热重分析、拉伸测量、膨胀度测定和细胞毒性测试对合成样品进行了表征。结果表明，HEMA 在 NR 颗粒周围形成了纳米级基质，从而提高了制备样品的拉伸强度、耐热性和膨胀度。细胞毒性测试表明，该膜可安全用于人体，因为在浓度高达 1024 µg/mL 时，它对 Vero 细胞没有毒性。此外，该膜对 Fe3+ 具有很高的吸附能力，Koble-Corrigan 等温线模型和一阶-二阶动力学方程对其进行了很好的描述。此外，该膜还表现出极佳的可回收性，可在五个连续循环中保持对 Fe3+ 离子的吸附能力。总之，这些发现可能会建议将 NR-HEMA 膜作为去除金属应用的一种有前途的候选材料。

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来源期刊

Macromolecular Research 工程技术-高分子科学

CiteScore

4.70

自引率

8.30%

发文量

100

审稿时长

1.3 months

期刊介绍： Original research on all aspects of polymer science, engineering and technology, including nanotechnology Presents original research articles on all aspects of polymer science, engineering and technology Coverage extends to such topics as nanotechnology, biotechnology and information technology The English-language journal of the Polymer Society of Korea Macromolecular Research is a scientific journal published monthly by the Polymer Society of Korea. Macromolecular Research publishes original researches on all aspects of polymer science, engineering, and technology as well as new emerging technologies using polymeric materials including nanotechnology, biotechnology, and information technology in forms of Articles, Communications, Notes, Reviews, and Feature articles.