TY - JOUR
T1 - Quaternized Chitosan/Poly(acrylic acid) Polyelectrolyte Complex Hydrogels with Tough, Self-Recovery, and Tunable Mechanical Properties
AU - You, Jun
AU - Xie, Shuyi
AU - Cao, Jinfeng
AU - Ge, Hao
AU - Xu, Min
AU - Zhang, Lina
AU - Zhou, Jinping
N1 - Publisher Copyright:
© 2016 American Chemical Society.
PY - 2016/2/9
Y1 - 2016/2/9
N2 - Quaternized chitosan (QCh) was homogeneously synthesized by reacting chitosan with 3-chloro-2-hydroxypropyltrimethylammonium chloride (CHPTAC) in alkali/urea aqueous solution for the first time. The structure and solution properties of QCh were characterized by using element analysis, FT-IR, 13C NMR, SEC-LLS, rheology, viscometer, and ξ-potential measurements. Subsequently, polyelectrolyte complex (PEC) hydrogels were constructed by in situ polymerization of acrylic acid (AA) monomers in the concentrated QCh solution. The structure and mechanical behavior of the prepared hydrogels were systematic studied. Because of the high charge density and solubility of QCh, strong electrostatic interactions were formed in the hydrogels and endowed them tough with self-recovery properties. The mechanical behavior of the hydrogels was accurately tuned from stiff and viscoelastic to soft and elastic by changing the poly(acrylic acid) (PAA) content. The regulation mechanism relied on the remarkable difference in the chain segmental mobility between QCh and PAA. Moreover, the QCh/PAA PEC hydrogels displayed excellent solvent-induced shape-memory behavior due to the reversible properties of the ionic bonds. In summary, we offered a novel modification method for chitosan and opened up a new avenue to construct chitosan-based hydrogels with outstanding mechanical properties.
AB - Quaternized chitosan (QCh) was homogeneously synthesized by reacting chitosan with 3-chloro-2-hydroxypropyltrimethylammonium chloride (CHPTAC) in alkali/urea aqueous solution for the first time. The structure and solution properties of QCh were characterized by using element analysis, FT-IR, 13C NMR, SEC-LLS, rheology, viscometer, and ξ-potential measurements. Subsequently, polyelectrolyte complex (PEC) hydrogels were constructed by in situ polymerization of acrylic acid (AA) monomers in the concentrated QCh solution. The structure and mechanical behavior of the prepared hydrogels were systematic studied. Because of the high charge density and solubility of QCh, strong electrostatic interactions were formed in the hydrogels and endowed them tough with self-recovery properties. The mechanical behavior of the hydrogels was accurately tuned from stiff and viscoelastic to soft and elastic by changing the poly(acrylic acid) (PAA) content. The regulation mechanism relied on the remarkable difference in the chain segmental mobility between QCh and PAA. Moreover, the QCh/PAA PEC hydrogels displayed excellent solvent-induced shape-memory behavior due to the reversible properties of the ionic bonds. In summary, we offered a novel modification method for chitosan and opened up a new avenue to construct chitosan-based hydrogels with outstanding mechanical properties.
UR - https://www.scopus.com/pages/publications/84957998553
U2 - 10.1021/acs.macromol.5b02231
DO - 10.1021/acs.macromol.5b02231
M3 - 文章
AN - SCOPUS:84957998553
SN - 0024-9297
VL - 49
SP - 1049
EP - 1059
JO - Macromolecules
JF - Macromolecules
IS - 3
ER -