Effect of Polyelectrolyte Charge Density on the Linear Viscoelastic Behavior and Processing of Complex Coacervate Adhesives

被引:7
|
作者
van Westerveld, Larissa [1 ]
Pelras, Theophile [1 ,2 ]
Hofman, Anton H. [1 ]
Loos, Katja [2 ]
Kamperman, Marleen [1 ]
Sayed, Julien Es [1 ]
机构
[1] Univ Groningen, Zernike Inst Adv Mat, Polymer Sci, NL-9747 AG Groningen, Netherlands
[2] Univ Groningen, Zernike Inst Adv Mat, Macromol Chem & New Polymer Mat, NL-9747 AG Groningen, Netherlands
基金
欧洲研究理事会; 荷兰研究理事会;
关键词
BULK; SALT; SUPERPOSITION; WATER;
D O I
10.1021/acs.macromol.3c02352
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
It is well-known that the phase behavior and physicochemical and adhesive properties of complex coacervates are readily tuneable with the salt concentration of the medium. For toxicity reasons, however, the maximum applicable salt concentration in biomedical applications is typically low. Consequently, other strategies must be implemented in order to optimize the properties of the resulting complex coacervates. In this work, the effect of the charge density of a strong polyanion on the properties of complex coacervates was studied. To control this charge density, statistical anionic/charge-neutral hydrophilic copolymers were synthesized by means of an elegant protection/deprotection strategy and subsequently complexed with a strong polycation. The resulting complexes were observed to have an increasing water content as well as faster relaxation dynamics, with either increasing salt concentration or decreasing charge density. Time-salt and time-salt-charge density superpositions could be performed and showed that the relaxation mechanism of the complex coacervates remained unchanged. When the charge density was decreased, lower salt concentration complexes became suitable for viscoelastic adhesion with improved injectability. Such complex coacervates are promising candidates for injectable biomedical adhesives.
引用
收藏
页码:652 / 663
页数:12
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