Tough and multi-responsive hydrogels based on core-shell structured macro-crosslinkers

被引：13
作者：
Du, Gao-lai [1 ,2 ]
Cong, Yang [3 ]
Chen, Long [3 ]
Chen, Jing [1 ,2 ]
Fu, Jun [1 ,2 ]
机构：
[1] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Polymers & Composites Div, Ningbo 315201, Zhejiang, Peoples R China
[2] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Cixi Inst Biomed Engn, Ningbo 315201, Zhejiang, Peoples R China
[3] Ningbo Univ Technol, Sch Chem Engn, Ningbo 315201, Zhejiang, Peoples R China
来源：
CHINESE JOURNAL OF POLYMER SCIENCE | 2017年 / 35卷 / 10期
基金：
浙江省自然科学基金; 中国国家自然科学基金;
关键词：
Macro-crosslinker; Toughness; Multi-responsive; Hydrophobic association; Hydrogel; HIGH MECHANICAL STRENGTH; SELF-HEALING HYDROGELS; TRIBLOCK COPOLYMER MICELLES; PHYSICAL HYDROGELS; BEHAVIOR;
D O I：
10.1007/s10118-017-1979-5
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Novel hydrogels based on core-shell structured macro-crosslinkers were synthesized, which exhibited high toughness and multiple responsiveness. Sodium dodecyl sulfate (SDS) micelles mediated by NaCl were used to encapsulate hydrophobic stearyl methacrylate (C18) in the core, and hydrophilic 2-acrylamido-2-methyl-1-propanesulfonic (AMPS) monomers in the corona. Such core-shell micelles were simultaneously copolymerized with acrylamide monomers through free radical polymerization. As a result, hydrogels crosslinked by amphiphilic "poly(C18)-PAMPS" macro-crosslinkers were obtained. These hydrogels showed excellent tensile and compression strength and toughness. Cyclic compression loading-unloading tests demonstrated that the hydrogels were of outstanding fatigue resistance, and showed partial damage of energy dissipation mechanism. The damaged energy dissipation mechanism could be recovered at room temperature and the recovery could be accelerated at elevated temperatures. The hydrogels were sensitive to the change in pH and ion strength, showing reversible swelling/deswelling behaviors.
引用
收藏
页码：1286 / 1296
页数：11
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