Scholarlink

Abstract <p>With the help of physicochemical methods (viscometry, UV spectroscopy, dynamic light scattering and scanning electron microscopy), the viscosity and structural characteristics of solutions and hydrogels based on L-cysteine and silver nitrate (cysteine–silver solution, CSS) and polysaccharide carrageenan (CAR) are studied. It is found that transparent, stable over time CSS–CAR solutions are formed, if CAR concentration in the samples is varied in the range of 0.0010–0.0030 mg/mL. We assume that association of opposite charged chain structures of cysteine–silver solution with CAR macromolecules due to electrostatic interactions takes place in CSS–CAR samples. Addition of an electrolyte (CuSO<sub>4</sub>) into CSS–CAR solution initiates gelation, electrolyte ions join as a linker CSS cluster chains, the same as in CSS–CuSO<sub>4</sub> gels. A scheme of self-assembly and gelation in CSS–CAR and CSS–CAR–CuSO<sub>4</sub> hydrogels is suggested.</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

Self-Assembly and Gelation in Aqueous Solutions of the Amino Acid L-Cysteine, Silver Nitrate and Polysaccharide Carrageenan

  • 期刊论文

  • 发表日期：

    2026年6月25日

查看全文
  • N. A. Ershov,
  • S. D. Khizhnyak,
  • A. I. Ivanova,
  • P. M. Pakhomov

摘要

Abstract

With the help of physicochemical methods (viscometry, UV spectroscopy, dynamic light scattering and scanning electron microscopy), the viscosity and structural characteristics of solutions and hydrogels based on L-cysteine and silver nitrate (cysteine–silver solution, CSS) and polysaccharide carrageenan (CAR) are studied. It is found that transparent, stable over time CSS–CAR solutions are formed, if CAR concentration in the samples is varied in the range of 0.0010–0.0030 mg/mL. We assume that association of opposite charged chain structures of cysteine–silver solution with CAR macromolecules due to electrostatic interactions takes place in CSS–CAR samples. Addition of an electrolyte (CuSO4) into CSS–CAR solution initiates gelation, electrolyte ions join as a linker CSS cluster chains, the same as in CSS–CuSO4 gels. A scheme of self-assembly and gelation in CSS–CAR and CSS–CAR–CuSO4 hydrogels is suggested.