High strength graphene oxide/polyvinyl alcohol composite hydrogels

Zhang, Lu; Wang, Zhipeng; Xu, Chen; Li, Yang; Gao, Jianping; Wang, Wei; Yu, Liu

doi:10.1039/c0jm04043f

Cited by 387 publications

(283 citation statements)

References 42 publications

(41 reference statements)

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“…In fact, when the samples are built up of different nanoclusters with different functional groups, the chemical environment for the nearest bonded atoms may vary depending on the nature of the second neighbours. Thus the measurable energy shift of the specific peaks may vary significantly (0.3 eV or even more) [24,[39][40][41]]. An example of the peak synthesis of the O1s and C1s regions for the rGO/PVA 3:3 sample is shown in Fig.…”

Section: Xps Analysismentioning

confidence: 99%

“…The amount of GR or GO is usually low (< 10 wt.%) to avoid the aggregation [23]. Zhang et al [24] added 0.8 wt.% GO into a PVA matrix and the resulting GO/PVA hydrogel exhibited a 132% increase in tensile strength. Ye et al [25] fabricated 3D GO-epoxy composite aerogel with maximum 9 wt.% GO, which not only exhibits a higher decomposition temperature and better mechanical strength (~0.23 MPa), but also achieves high elasticity, as it recovers from a large compressive strain without significant permanent deformation.…”

Section: Introductionmentioning

confidence: 99%

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Structure, Mechanical and Electrochemical Properties of Thermally Reduced Graphene Oxide-poly (Vinyl Alcohol) Foams

Wang

Chen

et al. 2017

Period. Polytech. Chem. Eng.

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Section: Xps Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structure, Mechanical and Electrochemical Properties of Thermally Reduced Graphene Oxide-poly (Vinyl Alcohol) Foams

Wang

Chen

et al. 2017

Period. Polytech. Chem. Eng.

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“…PVA hydrogel has been one of the most widely used polymer as a potential articular cartilage substitute due to its excellent biocompatibility, good load-bearing properties, and can be easily processed and modified [12,18]. The swelling behavior [19,20], mechanical properties [21,22], and biotribological properties [23][24][25] of PVA hydrogels has been widely characterized by researchers. Tadavarthy et al [26] found no adverse effects in surrounding tissue after implanting PVA gels subcutaneously or intramuscularly into rabbits.…”

Section: Introductionmentioning

confidence: 99%

Effects of polymerization degree on recovery behavior of PVA/PVP hydrogels as potential articular cartilage prosthesis after fatigue test

Yan¹,

Xiong²,

Peng³

et al. 2016

Express Polym. Lett.

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Abstract. Poly (vinyl alcohol)/poly (vinyl pyrrolidone) (PVA/PVP) hydrogels with various polymerization degrees of PVA were synthesized by a repeated freezing-thawing method. The influence of polymerization degree on microstructure, water content, friction coefficient, compressive fatigue and recovery properties of PVA/PVP hydrogels were investigated. The results showed that higher polymerization degree resulted in larger compressive modulus and lower friction coefficient. The fatigue behaviors of PVA/PVP hydrogels were evaluated under sinusoidal compressive loading from 200 to 800 N at 5 Hz for up to 50 000 cycles. The unconfined uniaxial compressive tests of PVA/PVP hydrogels were performed before and after fatigue test. During the fatigue test, the height of the hydrogel rapidly decreased at first and gradually became stable with loading cycles. The compressive tangent modulus measured 0 h after fatigue was significantly larger than the values obtained before test, and then the modulus recovered to its original level for 48 h after test. However, the geometry of hydrogels could not return to the original level due to the creep effects. PVA/PVP hydrogels prepared with lower polymerization degree showed better recovery capability than that prepared with high polymerization degree.

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“…4,5 Most work on composites of biopolymers and graphenic materials has been carried out with non-conducting graphene oxide (GO). 19,20 More specifically, a number of authors have shown that the addition of GO can improve the mechanical properties of chitosan films significantly 21,22 and there are some reports on the effects of graphene oxide on the biocompatibility of graphene-chitosan composite films. 10,23 However, very little work has been done to study the effect of the addition of well dispersed, electrically conductive graphene nanosheets on the chitosan matrix.…”

Section: Introductionmentioning

confidence: 99%

Processable conducting graphene/chitosan hydrogels for tissue engineering

et al. 2015

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Composites of graphene in a chitosan-lactic acid matrix were prepared to create conductive hydrogels that are processable, exhibit tunable swelling properties and show excellent biocompatibility. The addition of graphene to the polymer matrix also resulted in significant improvements to the mechanical strength of the hydrogels, with the addition of just 3 wt% graphene resulting in tensile strengths increasing by over 200%. The composites could be easily processed into three-dimensional scaffolds with finely controlled dimensions using additive fabrication techniques and fibroblast cells demonstrate good adhesion and growth on their surfaces. These chitosan-graphene composites show great promise for use as conducting substrates for the growth of electro-responsive cells in tissue engineering. Composites of graphene in a chitosan-lactic acid matrix were prepared to create conductive hydrogels that are processable, exhibit tunable swelling properties and show excellent biocompatibility. The addition of graphene to the polymer matrix also resulted in significant improvements to the mechanical strength of the hydrogels, with the addition of just 3 wt% graphene resulting in tensile strengths increasing by over 200 %. The composites could be easily processed into threedimensional scaffolds with finely controlled dimensions using additive fabrication techniques and fibroblast cells demonstrate good adhesion and growth on their surfaces. These chitosan-graphene composites show great promise for use as conducting substrates for the growth of electro-responsive cells in tissue engineering.

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High strength graphene oxide/polyvinyl alcohol composite hydrogels

Cited by 387 publications

References 42 publications

Structure, Mechanical and Electrochemical Properties of Thermally Reduced Graphene Oxide-poly (Vinyl Alcohol) Foams

Structure, Mechanical and Electrochemical Properties of Thermally Reduced Graphene Oxide-poly (Vinyl Alcohol) Foams

Effects of polymerization degree on recovery behavior of PVA/PVP hydrogels as potential articular cartilage prosthesis after fatigue test

Processable conducting graphene/chitosan hydrogels for tissue engineering

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