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Deciphering the interactions of fish gelatine and hyaluronic acid in aqueous solutions.

Abstract：

:The interactions of fish gelatine (FG) with hyaluronic acid (HA) are studied in an aqueous environment at 25°C by turbidimetric titration, confocal scanning laser microscopy, dynamic light scattering, zeta potentiometry, spectrophotometry with methylene blue, and construction of state diagrams. FG forms soluble complexes with HA above a boundary pH (pHφ1), where both biopolymers are net-negatively charged, but develop insoluble complexes as liquid-state complex coacervates below pHφ1, where the two biopolymers are oppositely charged. The insoluble complexes are continuously aggregated with further acid titration, followed by immediate visible phase-separation when another boundary pH (pHp) is reached. The complex formation is mainly driven by electrostatic attractions rather than hydrogen bonding or hydrophobic interactions. The complex formation is promoted by increasing FG-to-HA weight ratio or total biopolymer concentration, or at a low ionic strength, but significantly suppressed in the presence of high ionic strength.

journal_name

Int J Biol Macromol

journal_title

International journal of biological macromolecules

authors

Razzak MA,Kim M,Kim HJ,Park YC,Chung D

doi

10.1016/j.ijbiomac.2017.04.083

subject

Has Abstract

pub_date

2017-09-01 00:00:00

pages

885-892

eissn

0141-8130

issn

1879-0003

pii

S0141-8130(16)33054-9

journal_volume

102

pub_type

杂志文章

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