Mechanically strong graphene oxide/sodium alginate/polyacrylamide nanocomposite hydrogel with improved dye adsorption capacity

被引:457
作者
Fan, Jinchen [1 ]
Shi, Zixing [1 ]
Lian, Min [1 ]
Li, Hong [1 ]
Yin, Jie [1 ]
机构
[1] Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, State Key Lab Met Matrix Composite Mat, Shanghai 200240, Peoples R China
关键词
DOUBLE-NETWORK HYDROGELS; IN-SITU POLYMERIZATION; OXIDE; STRENGTH; BLENDS; TOUGH; NANOSHEETS; REDUCTION; BEHAVIOR; SHEETS;
D O I
10.1039/c3ta10639j
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
In this paper, a novel graphene oxide (GO)/sodium alginate (SA)/polyacrylamide (PAM) ternary nanocomposite hydrogel with excellent mechanical performance has been fabricated through free-radical polymerization of acrylamide (AAm) and SA in the presence of GO in an aqueous system followed with ionically crosslinking of calcium ions. As-prepared GO/SA/PAM (weight ratio SA : AAm = 1 : 2) ternary nanocomposite hydrogel with 5 wt% of GO displays a compressive stress as high as 1.543 MPa at the compressive deformation of 70%. The tensile strength and modulus of the hydrogel achieved similar to 201.7 and similar to 30.8 kPa, respectively. In the meantime, the ternary nanocomposite hydrogels can recover a large proportion of elongation at breakage and exhibits good elasticity. Additionally, the GO/SA/PAM ternary nanocomposite hydrogel exhibited good adsorption properties for water-soluble dyes. After introducing GO, the dye adsorption capacities of the hydrogel were significantly improved.
引用
收藏
页码:7433 / 7443
页数:11
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