Scholarlink

<p>Current scenario shows the need of low-cost adsorbent with the improved thermal and antimicrobial properties. The waste discorded and low-quality silk fibre satisfies the above requirements to some extent. The adsorption capacity of silk fibroin was increased by altering its structure chemically. ε-caprolactone (CL) was polymerized at 160&#xa0;°C through ring opening polymerization (ROP) methodology for two hours with stannous octoate (SO) as a catalyst and silk fibroin as a macro chemical initiator. The second phase involved treating the oxydianiline (ODA) modified by cyanuric chloride (CC) with the Silk-g-PCL system at 85&#xa0;°C for 6&#xa0;h while in an environment of air. To serve as a baseline, the silk fibroin was immediately treated with the ODA-CC system in an environment of air at 85&#xa0;°C for 6&#xa0;h. FT-IR spectroscopy, DSC, TGA, SEM, EDX, FE-SEM, and proton-NMR spectroscopy were used to characterize the end products. Additionally, its adsorption characteristics towards Cr<sup>6+</sup> and the dye Rhodamine 6G (R6G) were examined. The parameters of thermodynamics were established. The PCL grafted silk fibroin matrix was validated by a peak at 1725&#xa0;cm<sup>−1</sup> in the FT-IR spectrum. In the <sup>1</sup>H-NMR spectra, a signal at 8.5&#xa0;ppm indicated that silk fibroin had undergone structural change.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Adsorption of Cr6+ and rhodamine 6G dye by modified silk fibroin: a comparative kinetic study

  • 期刊论文

  • 发表日期：

    2025年6月23日

查看全文
  • Anbarasan Ramasamy,
  • Nirmala Krishnan,
  • Agathian Kandhan,
  • Meenarathi Balakrishnan

摘要

Current scenario shows the need of low-cost adsorbent with the improved thermal and antimicrobial properties. The waste discorded and low-quality silk fibre satisfies the above requirements to some extent. The adsorption capacity of silk fibroin was increased by altering its structure chemically. ε-caprolactone (CL) was polymerized at 160 °C through ring opening polymerization (ROP) methodology for two hours with stannous octoate (SO) as a catalyst and silk fibroin as a macro chemical initiator. The second phase involved treating the oxydianiline (ODA) modified by cyanuric chloride (CC) with the Silk-g-PCL system at 85 °C for 6 h while in an environment of air. To serve as a baseline, the silk fibroin was immediately treated with the ODA-CC system in an environment of air at 85 °C for 6 h. FT-IR spectroscopy, DSC, TGA, SEM, EDX, FE-SEM, and proton-NMR spectroscopy were used to characterize the end products. Additionally, its adsorption characteristics towards Cr6+ and the dye Rhodamine 6G (R6G) were examined. The parameters of thermodynamics were established. The PCL grafted silk fibroin matrix was validated by a peak at 1725 cm−1 in the FT-IR spectrum. In the 1H-NMR spectra, a signal at 8.5 ppm indicated that silk fibroin had undergone structural change.