Silica-based Janus nanosheets for self-healing nanocomposite hydrogels

被引：11

作者：

Li, Mengnan ^{[1
]}

Li, Xiuli ^{[1
]}

Li, Chunyu ^{[1
]}

Liu, Hongchen ^{[1
]}

Wang, Wenxiang ^{[1
]}

Bai, Liangjiu ^{[1
]}

Chen, Hou ^{[1
]}

Yang, Lixia ^{[1
]}

机构：

[1] Ludong Univ, Sch Chem & Mat Sci, Key Lab High Performance & Funct Polymer Univ Sha, Collaborat Innovat Ctr Shandong Prov High Perform, Yantai, Peoples R China

来源：

EUROPEAN POLYMER JOURNAL | 2021年 / 155卷

基金：

中国国家自然科学基金;

关键词：

Janus nanosheet; Self-healing; Hydrogels; Pickering emulsion; DOUBLE-NETWORK HYDROGELS; PICKERING EMULSIONS; NANOPARTICLES; BONDS; TOUGH; PERFORMANCE; POLYDOPAMINE; ADHESIVE; STRENGTH; ACID);

D O I：

10.1016/j.eurpolymj.2021.110580

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

As functional nanocomposites, Janus nanomaterials can play an important role due to their asymmetric structure and different components on the same surface. In this manuscript, hollow silicon spheres (SiO2 JHs) with an asymmetric structure were prepared by an emulsion interfacial self-organized sol-gel process. Inspired by mussel chemistry, the exposed surfaces of the SiO2 JHs were modified chemically by polydopamine (PDA). 2-(3-(6Methyl-4-oxo-1,2,3,4-tetrahydropyrimidin-2-yl)ureido)ethyl methacrylate (MAUPy) containing multiple hydrogen bond groups were grafted to obtain SiO2@PDA/PMAUPy Janus Nanosheets (SiO2@PDA/PMAUPy JNs) by Pickering emulsion. The prepared SiO2@PDA/PMAUPy JNs were further applied to prepare nanocomposite self-healing hydrogels. As a result of the synergy of reversible non-covalent metal-ligand and hydrogen bonding, hydrogels with dual self-healing feature were successfully fabricated. The obtained hydrogels maintain preferable mechanical properties (strain of about 411.0% and stress of about 4.1 MPa) and excellent healing ratio (92.6%), which may have broad application prospects in smart flexible sensor and biomedical application.

引用

页数：10

共 76 条

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