Interfacial Tension of Complex Coacervated Mussel Adhesive Protein According to the Hofmeister Series

Title
Interfacial Tension of Complex Coacervated Mussel Adhesive Protein According to the Hofmeister Series
Author(s)
서정현임성혜[임성혜]문재석[문재석]김효정[김효정]강인석[강인석]차형준[차형준]
Keywords
ATOMIC-FORCE MICROSCOPE; POLYSACCHARIDE COMPLEXES; UNDERWATER ADHESIVES; AQUEOUS-ELECTROLYTE; COLLOIDAL FORCES; SURFACE-TENSION; SALT; MACROMOLECULES; ENCAPSULATION; LYSOZYME
Issue Date
201402
Publisher
AMER CHEMICAL SOC
Citation
LANGMUIR, v.30, no.4, pp.1108 - 1115
Abstract
Complex coacervation is a liquid liquid phase separation in a colloidal system of two oppositely charged polyelectrolytes or colloids. The interfacial tension of the coacervate phase is the key parameter for micelle formation and interactions with the encapsulating material. However, the relationship between interfacial tensions and various salt solutions is poorly understood in complex coacervation. In the present work, the complex coacervate dynamics of recombinant mussel adhesive protein (MAP) with hyaluronic acid (HA) were determined in the presence of Hofmeister series salt ions. Using measurements of absorbance, hydrodynamic diameter, capillary force, and receding contact angle in the bulk phase, the interfacial tensions of complex coacervated MAP/HA were determined to be 0.236, 0.256, and 0.287 mN/m in 250 mM NaHCOO, NaCl, and NaNO3 solutions, respectively. The sequences of interfacial tensions and contact angles of the complex coacervates in the presence of three sodium salts with different anions were found to follow the Hofmeister ordering. The tendency of interfacial tension between the coacervate and dilute phases in the presence of different types of Hofmeister salt ions could provide a better understanding of Hofmeister effects on complex coacervated materials based on the protein polysaccharide system. This information can also be utilized for microencapsulation and adsorption by controlling intramolecular interactions. In addition, the injection molding dynamics of mussel byssus formation was potentially explained based on the measured interfacial tension of coacervated MAP.
URI
http://hdl.handle.net/YU.REPOSITORY/33167http://dx.doi.org/10.1021/la403680z
ISSN
0743-7463
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공과대학 > 화학공학부 > Articles
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