Nanographite/nanosilica-filled dopamine-containing polyacrylamide hydrogels of temperature-sensitive photothermal responses

被引：4

作者：

Zhang, Haili ^{[1
,2
,3
]}

Xu, Chenggong ^{[3
,5
]}

Li, Deke ^{[3
,4
]}

Huang, Jinxia ^{[3
]}

Guo, Zhiguang ^{[1
,2
,3
]}

机构：

[1] Hubei Univ, Sch Mat Sci & Engn, Key Lab Green Preparat & Applicat Funct Mat, Minist Educ, Wuhan 430062, Peoples R China

[2] Hubei Univ, Hubei Key Lab Polymer Mat, Wuhan 430062, Peoples R China

[3] Chinese Acad Sci, State Key Lab Solid Lubricat, Lanzhou Inst Chem Phys, Lanzhou 730000, Peoples R China

[4] Lanzhou Inst Technol, Sch Mat Engn, Lanzhou 730050, Peoples R China

[5] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2024年 / 312卷

关键词：

Electrical conductivity; Hydrogels; Photothermal effect; Stability;

D O I：

10.1016/j.matchemphys.2023.128578

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Conductive hydrogels are of significant interest because of their important applications in flexible electronics, energy storage, and human-computer interaction. However, the deficiencies of weak electrical conductivity and mechanical properties seriously hinder the applications of conductive hydrogels in these frontier areas. In this research, conductive hydrogels with high electrical conductivity, excellent self-recovery properties and outstanding photothermal effects are prepared by synergistic interaction of dopamine, silica nanoparticles, graphite nano-powder (Grn) and polyacrylamide chains. The effects of Grn and temperature on the conductivity of the hydrogels are investigated in detail. The hydrogels feature highest conductivity (7.2 mS/cm) and even 9.1 mS/cm at 60 degrees C due to the excellent thermal and electrical conductivity of Grn, which also endows the hydrogels with excellent photothermal effect and stable energy storage properties. Notably, the catechol group of dopamine (DA) leads to excellent self-adhesive properties of the conductive hydrogels. The use of silicon dioxide nano -particles (SNs) allows the conductive hydrogels to obtain favorable toughness as well as self-recovery properties. This provides a broad prospect for the applications of conductive hydrogels in practice.

引用

页数：8