Structural transitions and rheological properties of poly-d-lysine hydrobromide: effect of pH, salt, temperature, and shear rate
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Héla Khemissi
Abstract
In this work, we analyzed the pH, temperature, and salt effects of the charged polypeptide and its size, poly-d-lysine (PDL) molecules while applying dynamic light scattering (DLS), Zeta potential, and rheology techniques to assess the most important characteristics of PDL. The experimental results showed that the structural transitions of PDL were a result of a competition between electrostatic interaction, which promotes an extended state, and the hydrophobic effect, which favors a compact state. Moreover, by exploiting the electrokinetic charge on the PDL molecules the zeta potential was determined. We tried to find an analogy between size, viscosity, and conformational changes of PDL so to serve as a guide for polypeptide aggregation in solution.
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: None declared.
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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© 2022 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Material Properties
- Development and characterization of eco-friendly biopolymer gellan gum based electrolyte for electrochemical application
- Structural transitions and rheological properties of poly-d-lysine hydrobromide: effect of pH, salt, temperature, and shear rate
- Carbon dioxide adsorption onto modified polyvinyl chloride with ionic liquid
- Synergistic effect of organic-Zn(H2PO2)2 and lithium containing polyhedral oligomeric phenyl silse-squioxane on flame-retardant, thermal and mechanical properties of poly(ethylene terephthalate)
- Preparation and Assembly
- Network structural hardening of polypropylene matrix using hybrid of 0D, 1D and 2D carbon-ceramic nanoparticles with enhanced mechanical and thermomechanical properties
- An environment friendly hemp fiber modified with phytic acid for enhancing fire safety of automobile parts
- Flexible silicone rubber/carbon fiber/nano-diamond composites with enhanced thermal conductivity via reducing the interface thermal resistance
- In situ synthesis of Ag NPs in the galactomannan based biodegradable composite for the development of active packaging films
- Engineering and Processing
- Multi-objective optimization of injection molded parts with insert based on IFOA-GRNN-NSGA-II
Artikel in diesem Heft
- Frontmatter
- Material Properties
- Development and characterization of eco-friendly biopolymer gellan gum based electrolyte for electrochemical application
- Structural transitions and rheological properties of poly-d-lysine hydrobromide: effect of pH, salt, temperature, and shear rate
- Carbon dioxide adsorption onto modified polyvinyl chloride with ionic liquid
- Synergistic effect of organic-Zn(H2PO2)2 and lithium containing polyhedral oligomeric phenyl silse-squioxane on flame-retardant, thermal and mechanical properties of poly(ethylene terephthalate)
- Preparation and Assembly
- Network structural hardening of polypropylene matrix using hybrid of 0D, 1D and 2D carbon-ceramic nanoparticles with enhanced mechanical and thermomechanical properties
- An environment friendly hemp fiber modified with phytic acid for enhancing fire safety of automobile parts
- Flexible silicone rubber/carbon fiber/nano-diamond composites with enhanced thermal conductivity via reducing the interface thermal resistance
- In situ synthesis of Ag NPs in the galactomannan based biodegradable composite for the development of active packaging films
- Engineering and Processing
- Multi-objective optimization of injection molded parts with insert based on IFOA-GRNN-NSGA-II
